TY - RPRT A1 - Wäsche, Rolf A1 - Köse, Fatma T1 - Einfluß der Verfahrensparameter beim Gelcasting auf die Entstehung bruchauslösender Gefügefehler in hochreinen Aluminiumoxidkeramiken N2 - Es wird die Untersuchung des Entlüftungsvorgangs in Keramikschlickern beschrieben, die Teil des Gelcastingprozesses zur Herstellung hochfester Aluminiumoxidkeramiken sind. Ziel der Untersuchung war es, den Einfluss von Viskosität und Entlüftungszeit als prozessvariablen auf die Entstehung von bruchauslösenden Fehlern im Gefüge zu verdeutlichen. T3 - BAM Forschungsberichtreihe - 221 PY - 1997 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-2294 SN - 978-3-89429-036-4 SN - 0938-5533 VL - 221 SP - 1 EP - 54 PB - Wirtschaftsverlag NW CY - Bremerhaven AN - OPUS4-229 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - RPRT A1 - Wäsche, Rolf A1 - Habig, Karl-Heinz T1 - Physikalisch-chemische Grundlagen der Feststoffschmierung - Literaturübersicht - N2 - Die für einen erfolgreichen Einsatz von Festschmierstoffen zur Minderung von Reibung und Verschleiß systembestimmender Parameter wie Last, Geschwindigkeit, Temperatur, umgebende Atmosphäre, Filmbildung und -haltung sowie die Anwendungstechnologien werden dargestellt, ferner Modellvorstellungen zum Verschleißverhalten von Festschmierstoffen im Hinblick auf konkrete Anwendungsfälle diskutiert. T3 - BAM Forschungsberichtreihe - 158 KW - Festschmierstoff KW - Transferschmierung KW - Hohe Temperaturen KW - Graphit KW - Reibung KW - Verschleißmodelle KW - gebundene Filme KW - Synergieeffekte PY - 1989 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-2921 SN - 978-3-88314-889-X SN - 0938-5533 VL - 158 SP - 1 EP - 112 PB - Wirtschaftsverlag NW CY - Bremerhaven AN - OPUS4-292 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wäsche, Rolf A1 - Naito, M. A1 - Jahanmir, S. T1 - TWA 27 Characterization Methods for Ceramic Powders and Green Bodies KW - Standardisierung KW - Keramische Pulver KW - Grünkörper PY - 2000 SN - 1016-2178 IS - 23 SP - 21 EP - 27 PB - National Institute of Standards and Technology AN - OPUS4-979 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Kautek, Wolfgang A1 - Rudolph, Pascale A1 - Brzezinka, Klaus-Werner A1 - Wäsche, Rolf ED - Meunier, M. T1 - Physical chemistry of the femtosecond and nanosecond laser-material-interaction with SiC and a SiC-TiC-TiB2 composite ceramic compound N2 - The interaction of nanosecond laser pulses in the ultraviolet wavelength range and femtosecond laser pulses in the near-infrared region with the direct semiconductor SiC and the composite compound SiC-TiC-TiB2 was investigated in respect to resulting physicochemical processes. Surface analytical techniques, such as XPS, µ-Raman, and EDX were used to identify the chemical changes between untreated and laser-treated areas. Single-pulse irradiation led to material modifications in the condensed state in most instances. Multi-pulse results differed depending on the pulse duration. In the nanosecond case, melting of the surface and redeposited material (debris) were observed. With femtosecond pulses instead, only negligible melting and few debris could be detected. Additionally, periodic structures (ripples) appeared, with parallel orientation and in most cases two different periodicities for a particular material. Laser ablation of all the studied compound materials exhibited preferential ablation of the lighter component elements. Crystal structure changes of the irradiated surface were observed as a consequence of laser-induced melting and resolidification. An oxidation process interfered with all this processes so that unstoichiometric oxides were formed. T2 - Symposium D - European Materials Research Society CY - Strasbourg, France DA - 2002-06-18 PY - 2002 UR - http://www.emrs-strasbourg.com/files/pdf/2002_SPRING/02_Prog_Dv2.pdf N1 - Serientitel: Applied surface science – Series title: Applied surface science VL - 208/209.2003,1 IS - 1 SP - 1 PB - Elsevier CY - Amsterdam AN - OPUS4-1732 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Wäsche, Rolf A1 - Suchantke, Christian A1 - Yarim, Rasim ED - Schulte, K. ED - Kainer, K. T1 - Sintern von Verbundwerkstoffen im System SiC-TiC-TiB2 T2 - 12. Tagung "Verbundwerkstoffe und Werkstoffverbunde" CY - Hamburg, Deutschland DA - 1999-10-05 KW - Sintern KW - Verbundwerkstoffe KW - Thermochemische Analyse PY - 1999 SN - 3-527-29967-X SP - 189 EP - 194 PB - Wiley-VCH CY - Weinheim AN - OPUS4-720 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Klaffke, Dieter A1 - Hartelt, Manfred A1 - Wäsche, Rolf ED - Bartz, Wilfried J. T1 - Non-Oxide Ceramics as Tribo Materials - Analysis of Wear Mechanisms under Oscillating Sliding Conditions in Various Atmospheres T2 - 12th International Colloquium Tribology CY - Esslingen, Germany DA - 2000-01-11 KW - Tribologie PY - 2000 SN - 3-924813-44-2 VL - 3 SP - 1755 EP - 1763 PB - Techn. Akad. Esslingen CY - Ostfildern AN - OPUS4-848 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Wäsche, Rolf T1 - Feste Schmierstoffe für hohe Temperaturen - Eine Literaturübersicht PY - 1989 SN - 0724-3472 VL - 36 IS - 3 SP - 145 EP - 151 PB - Expert Verlag CY - Renningen AN - OPUS4-1432 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Wäsche, Rolf A1 - Steinborn, Gabriele A1 - Klaffke, Dieter ED - Somiya, S. T1 - Gas pressure sintering of SiCp-alumina composites made by gelcasting and their tribological properties N2 - COMPOSITE MATERIALS OF A 99.7 % ALPHA-ALUMINA MATRIX WITH PLATELETS OF SILICON CARBIDE (SICP) HAVE BEEN PREPARED BY GELCASTING. DENSIFICATION WAS CARRIED OUT BY GAS-PRESSURE SINTERING WITHOUT FURTHER SINTERING AIDS. FIVE DIFFERENT COMPOSITIONS WITH 0, 5, 10, 15, AND 20 VOL.% SICP RESP. HAVE BEEN INVESTIGATED AND TRIBOLOGICAL PROPERTIES WERE CHARACTERIZED. INCREASING AMOUNT OF SICP AS RIGID PARTICLES IN THE FINE GRAINED MATRIX COMPLICATE THE DENSIFICATION PROCESS. WITH THE APPLICATION OF 50 BAR AR PRESSURE DURING THE FINAL SINTERING STEP AT A TEMPERATURE OF 1700 DEGREE C THE DENSITY OF THE SAMPLES COULD BE INCREASED BY 3-5%. INVESTIGATION OF THE TRIBOLOGICAL PROPERTIES AGAINST STEEL AS A COUNTERBODY UNDER UNLUBRICATED OSCILLATING SLIDING CONDITIONS SHOWED A HIGH COEFFICIENT OF FRICTION AND AN INCREASING WEAR RATE UP TO A SICP CONTENT OF 10 VOL. % . AT 15 AND 20 VOL. % SICP RESP. BOTH THE COEFFICIENT OF FRICTION AND THE COEFFICIENT OF WEAR DROP DOWN. T2 - 3rd IUMRS International Conference on Advanced Materials (ICAM) CY - Tokyo, Japan DA - 1993-08-31 PY - 1994 SN - 0-444-81993-2 N1 - Serientitel: Transactions of the Materials Research Society of Japan – Series title: Transactions of the Materials Research Society of Japan IS - 16B SP - 791 EP - 794 PB - Elsevier CY - Amsterdam AN - OPUS4-1433 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Yarim, Rasim A1 - Wäsche, Rolf A1 - Woydt, Mathias ED - Franek, F. T1 - Wear Behaviour of SiC-TiC-TiB2 Ceramic Composites Sliding against SiC up to 800°C and 2m/s T2 - 2nd World Tribology Congress ; 2nd WTC 2001 CY - Vienna, Austria DA - 2001-09-03 KW - Dry sliding KW - Tribochemistry KW - Silicon carbide KW - Titanium carbide KW - Titanium boride KW - High temperature KW - Ceramic composites PY - 2001 SN - 3-901657-07-X SP - 1(?) EP - 4(?) PB - ÖTG CY - Wien AN - OPUS4-1438 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Wäsche, Rolf A1 - Klaffke, Dieter ED - Andersson, P. T1 - Tribological Behaviour of Multiphase Ceramic Composites in the System Si-Ti-B-C Containing Free Carbon T2 - 9th Nordic Symposium on Tribology ; 9th NORDTRIB 2000 CY - Porvoo, Finland DA - 2000-06-11 PY - 2000 SN - 951-38-5276-8 SN - 0357-9387 N1 - Serientitel: VTT Symposium – Series title: VTT Symposium VL - 1 IS - 200 SP - 186 EP - 195 PB - VTT, Technical Research Centre of Finland CY - Espoo AN - OPUS4-1439 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf A1 - Naito, M. ED - Puri, V. ED - Adair, J. ED - Knobloch, C. ED - Huang, C. T1 - Electrokinetic Characterization of Aqueous Ceramic Suspensions T2 - Fine Powder Processing Conference '99 CY - State University, PA, USA DA - 1999-09-20 KW - Meßverfahren KW - Zeta Potenzial KW - Hochleistungskeramik PY - 1999 SP - 177 EP - 183 AN - OPUS4-1441 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Steinborn, Gabriele A1 - Wäsche, Rolf A1 - Reichel, U. T1 - Fabrication of porous ceramics made from nano sized alumina powder by gelcasting N2 - The gelcasting process was used for manufacturing porous ceramic bodies from nano sized powders. 3 different powders with specific surface areas between 12 and 30 m²/g were used. Solid content of the corresponding slurries was dependent on the milling procedure and the use of a suitable dispersant. For bimodal GradeA powder solid content was as high as 58 vol%. For sintering temperatures between 1250 and 1600°C the porosity varied between 45 and 20%, whereas the pore radii varied between 50 and 91nm. The grain size of crystallites in the sintered microstructures was about 1um. The reflection ratio for visible light increased in comparison to a reference sample made from conventional powder from 0.8 to 0.95 in the wavelenght range around 400nm. T2 - 2nd International Conference on Shaping of Advanced Ceramics CY - Gent, Belgium DA - 2002-10-24 PY - 2002 SP - 103 EP - 108 AN - OPUS4-1813 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Wäsche, Rolf A1 - Yarim, Rasim T1 - Tribological Behaviour of SiC-TiC-TiB2 Composites under Unlubricated Sliding Conditions KW - Silicon carbide KW - Titanium carbide KW - Titanium diboride KW - Alumina KW - Oscillating sliding KW - Relative humidity PY - 2003 SN - 1354-4063 SN - 1557-685X VL - 9-3 IS - 9 SP - 185 EP - 195 PB - Coppin CY - Deal AN - OPUS4-2486 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Klaffke, Dieter A1 - Steinborn, Gabriele A1 - Wäsche, Rolf A1 - Wötting, G. ED - Degischer, H.-P. T1 - Tribologische Untersuchungen an SiC- und Si3N4-basierten Keramiken T2 - 14. Symposium Verbundwerkstoffe und Werkstoffverbunde CY - Wien, Österreich DA - 2003-07-02 PY - 2003 SN - 3-527-30762-1 SP - 545 EP - 550 PB - Wiley-VCH CY - Weinheim AN - OPUS4-2591 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Yarim, Rasim A1 - Wäsche, Rolf T1 - Effect of Pre-oxidation on Friction and Wear Behaviour of a SiC-TiC-TiB2 composite PY - 2003 VL - 22 SP - 12 EP - 20 PB - Metallilaboratorio CY - Espoo AN - OPUS4-2517 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Klaffke, Dieter A1 - Yarim, Rasim A1 - Wäsche, Rolf T1 - Einfluss einer Voroxidation auf das tribologische Verhalten keramischer Komposits KW - SiC KW - TiC KW - TiB2 KW - Kompositkeramik KW - Reibung KW - Schwingungsverschleiß KW - Randzone KW - Luftfeuchte PY - 2003 SN - 0724-3472 VL - 50 IS - 2 SP - 34 EP - 39 PB - Expert Verlag CY - Renningen AN - OPUS4-2536 LA - deu AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Wäsche, Rolf A1 - Yarim, Rasim A1 - Klaffke, Dieter A1 - Hartelt, Manfred ED - Bartz, Wilfried J. T1 - Oscillating Sliding Wear Behaviour of SiC, TiC, TiB2, 59SiC-41TiB2 and 52SiC-24TiC-24TiB2 Materials up to 750°C in Air T2 - 14th International Colloquium Tribology, Tribology and Lubrication Engineering CY - Stuttgart, Deutschland DA - 2004-01-13 PY - 2004 SN - 3-924813-54-X VL - II SP - 1039 EP - 1045 PB - Techn. Akad. Esslingen CY - Ostfildern AN - OPUS4-3057 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Klaffke, Dieter A1 - Wäsche, Rolf A1 - Wötting, G. ED - Bartz, Wilfried J. T1 - Tribological Characterisation of a Sl3N4-TiN Composite Ceramic in Fretting Tests at Room Temperature T2 - 14th International Colloquium Tribology, Tribology and Lubrication Engineering CY - Stuttgart, Germany DA - 2004-01-13 PY - 2004 SN - 3-924813-54-X VL - III SP - 1413 EP - 1420 PB - Techn. Akad. Esslingen CY - Ostfildern AN - OPUS4-3058 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Klaffke, Dieter A1 - Wäsche, Rolf A1 - Aldinger, F. A1 - Janakiraman, N. ED - Bartz, Wilfried J. T1 - Tribological investigations on siliconcarbonitride ceramics derived from preceramic polymers T2 - 14th International Colloquium Tribology, Tribology and Lubrication Engineering CY - Stuttgart, Deutschland DA - 2004-01-13 PY - 2004 SN - 3-924813-54-X VL - 3 SP - 1403 EP - 1412 PB - Techn. Akad. Esslingen CY - Ostfildern AN - OPUS4-3059 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - CONF A1 - Wäsche, Rolf A1 - Yarim, Rasim A1 - Klaffke, Dieter A1 - Hartelt, Manfred T1 - Oscillating Sliding Wear Behaviour of SiC, TiC, TiB2, 59SiC-41TiB2 and 52SiC-24TiC-24TiB2 Materials up to 750°C in Air T2 - 14th International Colloquium Tribology, Tribology and Lubrication Engineering CY - Ostfildern, Germany DA - 2004-01-13 PY - 2004 AN - OPUS4-3076 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -