TY - CONF A1 - Jaenicke, Bernd A1 - Helms, Rolf A1 - Florian, Wolfgang A1 - Lipp, H. A1 - Seidl, W. A1 - Kaiser, B. T1 - Untersuchungen zur Zeit- und Kurzzeitschwingfestigkeit von St E 47 und St E 70 im geschweißten und ungeschweißten Zustand T2 - 5. Sitzung des Arbeitskreises "Betriebsfestigkeit" CY - Stuttgart, Deutschland DA - 1979-10-08 PY - 1979 VL - 5 SP - 597 EP - 619 PB - DVM CY - Stuttgart AN - OPUS4-9050 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Florian, Wolfgang A1 - Neumann, Volker T1 - Maßnahmen zur Begrenzung des Wasserstoffgehaltes im Schweißgut von Feinkornbaustählen T2 - 3. Internationales Kolloquium Schweißen in der Kerntechnik CY - Hamburg, Deutschland DA - 1978-11-28 PY - 1978 SN - 3-87155-353-0 SN - 0418-9639 N1 - Serientitel: DVS-Berichte – Series title: DVS-Berichte IS - 52 SP - 173 EP - 178 PB - Deutscher Verl. für Schweißtechnik CY - Düsseldorf AN - OPUS4-9013 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Prinz, N. A1 - Neumann, Eberhard A1 - Florian, Wolfgang A1 - Neumann, Volker A1 - Thiel, R. T1 - Schallemission als Mittel zur Beobachtung von Rißbeginn und Rißfortschritt bei Kaltrissen in geschweißten niedrig legierten hochfesten Stählen PY - 1980 SN - 0025-5300 VL - 22 IS - 9 SP - 361 EP - 364 PB - Carl Hanser Verlag CY - München AN - OPUS4-9418 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Neumann, Volker A1 - Florian, Wolfgang T1 - Beitrag zur Durchführung und Auswertung von Implantversuchen PY - 1980 SN - 0036-7184 VL - 32 IS - 9 SP - 383 EP - 387 PB - Verl. für Schweißen u. Verwandte Verfahren, DVS-Verl. CY - Düsseldorf AN - OPUS4-9447 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Preß, Henning A1 - Florian, Wolfgang T1 - Contribution on the Formation of Toxic substances in gas shielded arc welding and determination of Requiered Exhaustion Capacity T2 - Colloque sur Soudage et Santé CY - Estoril, Portugal DA - 1980-07-08 PY - 1980 SP - 1 EP - 8 PB - Instituto de Soldadura CY - Lisboa AN - OPUS4-9451 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Oran, Umut A1 - Swaraj, Sufal A1 - Friedrich, Jörg Florian A1 - Unger, Wolfgang T1 - Surface analysis of Plasma Deposited Polymer Films, 5 - ToF-SSIMS Characterization of Plasma Deposited Allyl Alcohol Films N2 - The effect of the composite plasma parameter P/F, where P is the plasma power and F is the monomer flow rate, on the chemical character of pulsed plasma deposited allyl alcohol films was investigated by ToF-SSIMS. Information on the unsaturated character, the cross-linked and/or branched character of the plasma polymer films was derived in detail. The problem of the retention of OH groups in plasma deposited allyl alcohol films was elucidated in detail using SSIMS data. The lowest conversion rate from the monomer's hydroxyl groups to other oxygen functionalities in the plasma was concluded for the plasma polymer film produced at a P/F ratio of 0.05 W · sccm-1. It was found that the overall oxygen content of the films decreased vs. increasing P/F ratio. Because the freshly prepared films were investigated without air exposure, ageing on ambient air could be studied in detail. It was found that in the case of plasma deposited allyl alcohol films the ageing on air is probably based on two competing processes which are discussed in detail. Additionally, a review of literature data on the characterization of plasma deposited allyl alcohol films is given. KW - Ageing KW - Allyl alcohol KW - Plasma polymerization KW - ToF-SIMS PY - 2005 DO - https://doi.org/10.1002/ppap.200400075 SN - 1612-8850 SN - 1612-8869 VL - 2 IS - 7 SP - 563 EP - 571 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-11933 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Swaraj, Sufal A1 - Oran, Umut A1 - Lippitz, Andreas A1 - Friedrich, Jörg Florian A1 - Unger, Wolfgang T1 - Aging of Plasma-Deposited Films Prepared from Organic Monomers N2 - Plasma-deposited polymer films were prepared from organic molecules and investigated using near edge X-ray absorption fine structure (NEXAFS) and X-ray photoelectron spectroscopy (XPS) for aging effects after exposure to air. Results from the investigation of homopolymers are summarized. Primarily the effect of the deposition parameters duty cycle and power are dealt with. The effect of the deposition parameter pressure is briefly discussed. An example to show the effect of feed gas composition on the aging of plasma polymerized ethylene/allyl alcohol and styrene/allyl alcohol copolymer is also given. In general, change in content of unsaturated or aromatic species, change in concentration of monomer functionality, and change in the oxygen content was observed in the plasma polymerized films on aging. KW - Plasma copolymer KW - ESCA/XPS KW - NEXAFS KW - Plasma polymerization PY - 2007 SN - 1612-8850 SN - 1612-8869 VL - 4 IS - S1 SP - S784 EP - S789 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-11934 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Swaraj, Sufal A1 - Oran, Umut A1 - Lippitz, Andreas A1 - Schulze, Rolf-Dieter A1 - Friedrich, Jörg Florian A1 - Unger, Wolfgang T1 - Surface Analysis of Plasma-Deposited Polymer Films, 4 - In situ Characterization of Plasma-Deposited Ethylene Films by XPS and NEXAFS N2 - XPS and NEXAFS spectroscopy were used for the chemical characterization of pulsed plasma-deposited ethylene films before and after exposure to ambient air. The influence of external plasma parameters on the spectroscopic results was investigated. Information on the chemical character of the plasma-polymerized films, such as the regularity of the primary structure, the amount of long-living radicals, and branching or cross-linking or both was derived from this data. Irregularity and radical concentration for post-plasma reactions of the plasma-deposited films increased with the duty cycle or power. A decreased level of monomer fragmentation and, consequently, an increase in regularity is partially concluded from the experimental data when the monomer pressure is increased. The concentration of surface radicals available for post-plasma reactions also increased with monomer pressure. The correlation found between the degree of the post-plasma oxygen incorporation and the variation of the various external parameters agreed with earlier ToF-SSIMS findings. KW - ESCA/XPS KW - NEXAFS KW - Plasma polymerization KW - Polyethylene (PE) KW - Thin films PY - 2005 DO - https://doi.org/10.1002/ppap.200400070 SN - 1612-8850 SN - 1612-8869 VL - 2 IS - 4 SP - 310 EP - 318 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-11940 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Oran, Umut A1 - Swaraj, Sufal A1 - Friedrich, Jörg Florian A1 - Unger, Wolfgang T1 - Surface analysis of plasma-deposited polymer films by Time of Flight Static Secondary Ion Mass Spectrometry (ToF-SSIMS) before and after exposure to ambient air N2 - Pulsed plasma deposited styrene and ethylene films were studied by Time of Flight Static Secondary Ion Mass Spectrometry (ToF-SSIMS) before and after exposure to ambient air. The influence of the external plasma parameters on the secondary ion mass spectra of plasma deposited films was investigated. Approaches for the interpretation of SSIMS spectra of organic materials were reviewed and applied to the evaluation of SSIMS data of plasma deposited films. From these data, information on the chemical character of the plasma deposited films was derived. When the plasma polymers are exposed to air oxygen incorporation occurs. The oxygen uptake is high at the beginning and then it levels of. A relation that “higher the regularity of the film lower is the oxygen uptake” was found. Harder plasma conditions, which could be obtained by applying higher plasma power or lower monomer flow rate, result in higher oxygen uptake and vice versa. KW - Plasma polymerization KW - Polyethylene (PE) KW - Polystyrene (PS) KW - SIMS KW - Ageing PY - 2005 DO - https://doi.org/10.1016/j.surfcoat.2005.02.032 SN - 0257-8972 VL - 200 IS - 1-4 SP - 463 EP - 467 PB - Elsevier Science CY - Lausanne AN - OPUS4-11044 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Swaraj, Sufal A1 - Oran, Umut A1 - Lippitz, Andreas A1 - Friedrich, Jörg Florian A1 - Unger, Wolfgang T1 - Study of influence of external plasma parameters on plasma polymerised films prepared from organic molecules (acrylic acid, allyl alcohol, allyl amine) using XPS and NEXAFS N2 - Plasma polymerised films of acrylic acid, allyl alcohol and allyl amine were prepared and studied by XPS (X-ray photoelectron spectroscopy) and XAS (X-ray absorption spectroscopy). The influence of external plasma parameters on certain chemical aspects of the films was investigated. The use of XPS and NEXAFS (near edge X-ray absorption fine structure) as complimentary tools in the surface characterisation of thin films has been highlighted. Certain chemical aspects of the plasma polymerised films such as presence of ROCdouble bond; length as m-dashO in the case of plasma polymerised acrylic acid films, presence of RCdouble bond; length as m-dashO and RC–OR bonds in case of plasma polymerised allyl alcohol films and presence of RCdouble bond; length as m-dashN and C?N in case of plasma polymerised allyl amine films were studied. The concentration of ROCdouble bond; length as m-dashO species was found to decrease with increase in r.f. duty cycle in the case of plasma polymerised acrylic acid films. In case of plasma polymerised allyl alcohol films there is a decrease in the concentration of RCdouble bond; length as m-dashO species and increase in the concentration of RC–OR species at higher pressures, while in the case of plasma polymerised allyl amine films the concentration of RCdouble bond; length as m-dashN and C?N increases at higher powers, with an increase in C?N more pronounced at higher powers. KW - Plasma polymerization KW - NEXAFS KW - XPS KW - Plasma parameter PY - 2005 DO - https://doi.org/10.1016/j.surfcoat.2005.01.083 SN - 0257-8972 VL - 200 IS - 1-4 SP - 494 EP - 497 PB - Elsevier Science CY - Lausanne AN - OPUS4-11045 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Oran, Umut A1 - Swaraj, Sufal A1 - Friedrich, Jörg Florian A1 - Unger, Wolfgang T1 - Static ToF-SIMS analysis of plasma chemically deposited ethylene/allyl alcohol co-polymer films N2 - A plasma co-polymerization of ethylene as a “chain extending” monomer and allyl alcohol as a carrier monomer for hydroxyl groups was studied. The composition of the feed gas was systematically varied and the plasma co-polymers were analyzed in terms of their relative concentrations of OH functional groups by static Time of Flight Secondary Ion Mass Spectrometry (ToF-SIMS) immediately after their preparation without any air contact, i.e., under so called “in situ” conditions. The relative OH group concentration involved in the –CH2–OH groups was derived from the normalized yields of the CH3O+ secondary fragment ion. The density of functional groups in the plasma co-polymers was found to vary non-linearly with respect to the mole percentage of the monomers in the feed gas. Co-polymerization phenomena, i.e. chemical interactions and recombination reactions taking place between monomer molecules in the plasma and/or during the deposition process, become evident in ToF-SIMS spectra. KW - Plasma deposition KW - ToF-SIMS KW - Plasma co-polymerization KW - Ethylene KW - Allyl alcohol PY - 2006 DO - https://doi.org/10.1016/j.apsusc.2006.02.089 SN - 0169-4332 SN - 1873-5584 VL - 252 IS - 19 SP - 6588 EP - 6590 PB - North-Holland CY - Amsterdam AN - OPUS4-13724 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Swaraj, Sufal A1 - Oran, Umut A1 - Friedrich, Jörg Florian A1 - Lippitz, Andreas A1 - Unger, Wolfgang T1 - Surface Chemical Analysis of Plasma-Deposited Copolymer Films Prepared from Feed Gas Mixtures of Ethylene or Styrene with Allyl Alcohol N2 - Plasma deposited styrene/allyl alcohol and ethylene/allyl alcohol copolymer films were prepared and characterized using XPS, NEXAFS and ToF-SIMS. The relative partial flow rates of the co-monomers are used as deposition process parameters to vary and all other process parameters were constrained to conditions optimized for retention of functional groups. By doing this it is possible to control certain chemical properties of the copolymer films such as unsaturation, oxygen and hydroxyl group relative surface contents. The aging behavior of the plasma copolymer films on air was studied, too. Non-linear variations of relative oxygen contents, contents of C—OR species and contents of carbonyl species are obtained vs. variation of feed gas composition for both monomer combinations. The chemical character of the plasma copolymer films varies between the limits given by the respective plasma homopolymers. The observed non-linear correlations are discussed in terms of approaches developed for classic radical copolymerization. The aging behavior of the different plasma copolymers films depends on the feed gas composition. Principally these aging phenomena known from plasma polymer aging studies of that respective monomer which dominates the character of the plasma copolymer are observed. KW - Plasma polymers KW - Plasma copolymers KW - XPS KW - NEXAFS KW - Allyl alcohol KW - ESCA/XPS KW - Plasma polymerization KW - ToF-SIMS PY - 2007 SN - 1612-8850 SN - 1612-8869 VL - 4 IS - 4 SP - 376 EP - 389 PB - Wiley-VCH Verl. CY - Weinheim AN - OPUS4-14846 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wettmarshausen, Sascha A1 - Min, Hyegeun A1 - Unger, Wolfgang A1 - Jäger, Christian A1 - Hidde, Gundula A1 - Friedrich, Jörg Florian T1 - Significance of hydrogen-deuterium exchange at polyolefin surfaces on exposure to ammonia low-pressure plasma N2 - Since more than 40 years ammonia plasma exposure of polyolefins is used for introduction of primary amino groups. The selectivity of this reaction and the yield in primary amino groups was found to be low. Here, a prominent side-reactions of this process was investigated, the hydrogenation by NH3 plasma. For identification of hydrogenation ammonia (NH3) and deuterated ammonia (ND3) were exposed to Polyethylene (h-PE) and fully deuterated polyethylene (d-PE) as well as hexatriacontane (h-HTC) and fully deuterated hexatriacontane (d-HTC) as low-molecular weight model for PE. H–D exchange was assumed and detected by Time-of-Flight Secondary Ion Mass Spectrometry (ToF–SIMS), X-ray Photoelectron Spectroscopy (XPS), Attenuated Total Reflectance (ATR-FTIR) and 1H and 2H Nuclear magnetic Resonance. Results show a significant H–D exchange within the sampling depth of ATR (2.5 µm). However, N- and NH2 introduction was limited to the topmost surface as shown by SIMS and XPS (a few nanometers). KW - Deuterated ammonia KW - Ammonia plasma KW - Deuterated polyolefins KW - Hexatriacontane KW - H-D exchange PY - 2011 DO - https://doi.org/10.1007/s11090-011-9304-5 SN - 0272-4324 VL - 31 IS - 4 SP - 551 EP - 572 PB - Plenum Publ. Corp. CY - New York, NY, USA AN - OPUS4-24178 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Lippitz, Andreas A1 - Friedrich, Jörg Florian A1 - Unger, Wolfgang T1 - Plasma bromination of HOPG surfaces: a NEXAFS and synchrotron XPS study N2 - Br bonding on plasma brominated graphite surfaces has been studied by using Near Edge X-ray Absorption Fine Structure (NEXAFS) and X-ray Photoelectron Spectroscopy (XPS). Br2 and bromoform were used as plasma gases in an r.f. cw low pressure plasma process. Kr plasma had been used to study separately the physical and chemical plasma etching effects. At early steps of plasma bromination which lead to only small XPS Br surface concentration values a quick decay of aromaticity has been observed. At low Br surface concentration radical or even electrophilic addition of bromine onto sp2 carbon atoms is discussed as the dominating reaction pathway. At higher Br surface concentrations the inherent formation of sp3 defects in the graphene network by chemical etching processes promotes nucleophilic substitution of bromine at sp3 carbons as a competing reaction pathway. Both reaction pathways lead to C–Br species characterized by the same Br 3d XPS binding energy. However more than one Br 3d component in XP spectra has been found at lower Br2 plasma induced Br surface concentrations and complexation of bromine at HOPG is assumed as a third way of interaction with Br2 plasma. KW - HOPG KW - Graphite KW - Plasma bromination KW - Low pressure plasma KW - NEXAFS KW - XPS PY - 2013 DO - https://doi.org/10.1016/j.susc.2013.01.020 SN - 0039-6028 VL - 611 SP - L1 EP - L7 PB - Elsevier CY - Amsterdam AN - OPUS4-27928 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Friedrich, Jörg Florian A1 - Retzko, Iris A1 - Kühn, Gerhard A1 - Unger, Wolfgang A1 - Lippitz, Andreas ED - Mittal, K. T1 - Metal doped plasma polymer films T2 - 7th Symposium on Metallized Plastics CY - Newark, NJ, USA DA - 1999-12-02 KW - Plasma polymer KW - r.f. pulsed plasma KW - Conducting films KW - Metal-polymer interface PY - 2001 SN - 90-6764-340-8 VL - 7 SP - 117 EP - 142 PB - VSP CY - Utrecht AN - OPUS4-929 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Kannengießer, Thomas A1 - Florian, Wolfgang A1 - Wilken, Klaus T1 - Moderne Möglichkeiten der Prüfung und Simulation von Bauteilschweißungen N2 - Die hier vorgestellte Großanlage zur Prüfung und Simulation von Bauteil­ schweißungen (GAPSI 16) mit einer Maximalprüfkraft von ±16 MN erlaubt wirklichkeitsnahe Analysen des Bau­ teilverhaltens während des Schwei­ ßens. Ein fundamentaler Vorteil ge­ genüber konventionellen Universal­ prüfmaschinen ist, Momente während des Schweißens mittels acht unabhän­ giger Hydraulikzylinder in zwei Prüf­ tischen aufbringen bzw. registrieren zu können. Derzeitige Forschungsvorhaben sind zum einen Spannungs- und Verformungsvorgängen während des Schweißens von Blechen und zum anderen Modellen gewidmet, womit Kenngrößen für Flammrichtarbeiten ermittelt werden können. Simulations­ versuche an Großproben tragen we­ sentlich zu höherer Aussagesicherheit bei, zumal konventionelle Prüfmetho­ den mit einfachen Kleinproben und auch Berechnungen nach der Finite­ Elemente-Methode (FEM) stets Rand­ bedingungen und zumeist größere Idealisierungen enthalten. Dagegen weist die Großprüfanlage GAPSI 16 mit angepaßten Probengeometrien und Spannkräften einen neuen Weg. KW - GAPSI 16 KW - Prüfung und Simulation KW - Bauteilschweißungen PY - 1997 SN - 0943-4569 VL - 70 IS - 5 SP - 192 EP - 194 PB - Allianz Versicherungen AG CY - München AN - OPUS4-38257 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Friedrich, Jörg Florian A1 - Geng, Sh. A1 - Unger, Wolfgang A1 - Lippitz, Andreas A1 - Erdmann, J. A1 - Gorsler, H.-V. T1 - Plasma functionalization and reorientation of macromolecules at polymer surfaces KW - Plasma KW - Polymer KW - Monolayer KW - Einschichtsystem KW - NEXAFS KW - Spektroskopie KW - Oberflächenanalyse PY - 1995 SN - 0257-8972 VL - 74-75 SP - 664 EP - 669 PB - Elsevier Science CY - Lausanne AN - OPUS4-627 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Friedrich, Jörg Florian A1 - Wigan, L. A1 - Unger, Wolfgang A1 - Lippitz, Andreas A1 - Erdmann, J. A1 - Gorsler, H.-V. T1 - Barrier properties of plasma and chemically fluorinated polypropylene and polyethyleneterephthalate N2 - The functionalization, perfluorination or an coating of polypropylene (PP) and polyethyleneterephthalate (PET) surfaces in different plasma atmospheres and in an F[2] + N[2] gas mixture were investigated. The aim of this work was to form a barrier layer against solvent and fuel permeation. Typical test solvents were n-pentane, toluene, tetrachloroethylene and mixtures of n-pentane and methanol. The permeation was gravimetrically measured. The permeation of the solvent mixtures was analyzed by mass spectrometry and Fourier transform IR spectroscopy. The permeation of the solvent mixtures through the plasma-modified polymer samples was associated with increased absorption of polar solvent components in the polymer film. The thickness of the plasma-fluorinated PP surface layer was 10-100 nm and that of chemically fluorinated PP about 5000 nm. Nearly the same barrier efficiency was measured for both plasma- and chemically fluorinated samples. T2 - International Conference on Plasma Surface Engineering No. 4 CY - Garmisch-Partenkirchen, Germany DA - 1994-09-19 KW - Plasma KW - Fluor KW - Plasmapolymer KW - Sperrschicht KW - Permeation PY - 1995 UR - http://cat.inist.fr/?aModele=afficheN&cpsidt=3158319 SN - 0257-8972 VL - 74-75 IS - 1-3 SP - 910 EP - 918 PB - Elsevier Science CY - Lausanne AN - OPUS4-628 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Lippitz, Andreas A1 - Koprinarov, Ivaylo A1 - Friedrich, Jörg Florian A1 - Unger, Wolfgang A1 - Weiss, K. A1 - Wöll, Ch. T1 - Surface analysis of metaillized poly(bisphenol A cabonate) films by x-ray absorption spectroscopy (NEXAFS) KW - NEXAFS KW - Röntgenadsorptionsspektroskopie KW - Oberflächenanalyse KW - Film, metallisiert KW - Polymeroberfläche PY - 1996 SN - 0032-3861 SN - 1873-2291 VL - 37 IS - 14 SP - 3157 EP - 3160 PB - Springer CY - Berlin AN - OPUS4-649 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Lippitz, Andreas A1 - Friedrich, Jörg Florian A1 - Unger, Wolfgang A1 - Schertel, A. A1 - Wöll, Ch. T1 - Surface analysis of partially crystalline and amorphous poly(ethylene terephthalate) samples by x-ray absorption spectroscopy (NEXAFS) KW - NEXAFS KW - Röntgenadsorptionsspektroskopie KW - Oberflächenanalyse KW - Polymeroberfläche PY - 1996 SN - 0032-3861 SN - 1873-2291 VL - 37 IS - 14 SP - 3151 EP - 3155 PB - Springer CY - Berlin AN - OPUS4-650 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Lippitz, Andreas A1 - Koprinarov, Ivaylo A1 - Friedrich, Jörg Florian A1 - Unger, Wolfgang A1 - Schertel, A. A1 - Wöll, Ch. T1 - NEXAFS analysis of a plasma treated, partially crystalline poly(ehtylene terephtalate) surface KW - NEXAFS KW - Röntgenstrukturanalyse KW - Oberflächen behandeln KW - Plasma PY - 1996 SN - 0179-4159 SP - 279 EP - 281 PB - Berliner Elektronenspeicherring-Gesellschaft für Synchrotronstrahlung CY - Berlin AN - OPUS4-681 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Unger, Wolfgang A1 - Lippitz, Andreas A1 - Gross, Thomas A1 - Friedrich, Jörg Florian A1 - Wöll, Ch. A1 - Nick, L. T1 - The Use of Octadecyltrichlorosilane Self-Assembled Layers as a Model for the Assessment of Plasma Treatment and Metallization Effects on Polyolefins N2 - Self-assembled octadecyltrichlorosilane (CH3(CH2)17SiCl3, OTS) films were deposited on an oxidized silicon wafer. They were carefully exposed to a low-pressure oxygen direct current (dc) plasma and/or Cr vapor. Subsequently, they were characterized by X-ray photoelectron spectroscopy, near-edge X-ray absorption fine structure spectroscopy, and atomic force microscopy. Detailed information on the oxygen functionalization and the molecular conformation of the OTS films was obtained. The main result was that functionalization conditions can be found where the order of the film remains almost unaffected. Similarly, Cr evaporation of pure OTS films revealed only slight effects on the order in the film. Cr evaporation of an ordered but functionalized OTS film immediately changes its state toward a fully isotropic one. In the course of interaction, oxygen sites at the surface of the functionalized OTS film are reduced whereas Cr becomes oxidized. A redox reaction scheme is proposed for this interfacial reaction. Finally, it is concluded that the given study should be of importance for advanced plasma processing of polyolefins. KW - NEXAFS KW - OTS Self-Assembled Layers PY - 1999 DO - https://doi.org/10.1021/la981174l SN - 0743-7463 SN - 1520-5827 VL - 15 IS - 4 SP - 1161 EP - 1166 PB - American Chemical Society CY - Washington, DC AN - OPUS4-808 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Friedrich, Jörg Florian A1 - Koprinarov, Ivaylo A1 - Giebler, Rainer A1 - Lippitz, Andreas A1 - Unger, Wolfgang T1 - Reactions and Intermediates at the Metal-Polymer Interface as Observed by XPS and NEXAFS Spectroscopy KW - XPS KW - NEXAFS KW - Interfacial polymer-metal redox reactions KW - Chromium-polymer intermediates KW - Near edge X-ray absorption fine structure spectroscopy KW - Adhesion KW - Polymer-metal bonds KW - Polymer-aluminium bonds KW - Polymer-copper bonds PY - 1999 SN - 0021-8464 SN - 1545-5823 VL - 71 SP - 297 EP - 321 PB - Gordon & Breach CY - New York, NY AN - OPUS4-798 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Kannengießer, Thomas A1 - Mc Inerney, T. A1 - Florian, Wolfgang A1 - Böllinghaus, Thomas A1 - Cross, C.E. ED - Cerjak, H. T1 - The influence of local weld deformation on hot cracking susceptibility T2 - 6th International Seminar on the Numerical Analysis of Weldability CY - Seggauberg, Austria DA - 2001-10-01 PY - 2002 SN - 1-902653-56-4 N1 - Serientitel: Books of IOM3 – Series title: Books of IOM3 IS - 784 SP - 803 EP - 818 PB - Maney CY - London AN - OPUS4-1793 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - RPRT A1 - Kannengießer, Thomas A1 - Böllinghaus, Thomas A1 - Florian, Wolfgang A1 - Herold, H. T1 - Effect of weld metal strength and welding conditions on reaction forces and stress distribution of restrained components N2 - Düring the past decades, weldability studies have predominantly been concentrated on the material and the welding process. In order to achieve a closer insight into the structural effects, component weldability tests have been performed by online monitoring of the reaction forces and moments. As a particular item, the effects of different strengths of the base and filier material on the reaction force and stress build up transverse to the welding direction have been studied at a specific structural restraint. As a most relevant result for practical welding it is demonstrated that the final reaction force and also the reaction stress level in the multilayer butt welds decreases with overmatch of the weld metal. PY - 2000 IS - IX-1971-00 SP - 1 EP - 18 PB - International Institute of Welding CY - Paris AN - OPUS4-11842 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -