TY - JOUR A1 - Skopp, André A1 - Klaffke, Dieter A1 - Buchkremer-Hermanns, H. A1 - Ren, H. A1 - Weiß, H. T1 - Tribological behavior of MW PACVD diamond coatings in vibrating contacts KW - Diamond coatings KW - Chemical vapour deposition KW - MW PACVD KW - Vibrating contacts KW - Steel/diamond pairings KW - Running-in KW - Wear KW - SEM KW - EDX KW - LRS KW - AFM KW - Surfaces KW - Wear scar KW - Transfer layer KW - Debris PY - 1997 SN - 1354-4063 SN - 1557-685X VL - 4-1 SP - 3 EP - 27 PB - Coppin CY - Deal AN - OPUS4-2429 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - GEN A1 - Skopp, André A1 - Klaffke, Dieter A1 - Buchkremer-Hermanns, H. A1 - Ren, H. A1 - Weiß, W. ED - Bartz, Wilfried J. T1 - Oscillating sliding behavior of MW PACVD diamond coatings T2 - 10th International Colloquium CY - Esslingen, Germany DA - 1996-01-09 PY - 1996 SN - 3-924813-34-5 N1 - Serientitel: Internationales Kolloquium / Technische Akademie Esslingen – Series title: Internationales Kolloquium / Technische Akademie Esslingen IS - 10 SP - 1943 EP - 1959 PB - Techn. Akad. Esslingen CY - Ostfildern AN - OPUS4-2419 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Skopp, André A1 - Klaffke, Dieter A1 - Buchkremer-Hermanns, H. A1 - Ren, H. A1 - Weiß, W. T1 - Tribotest journalTribological behavior of MW PACVD diamond coatings in vibrating contacts PY - 1997 SN - 1354-4063 SN - 1557-685X VL - 4-1 SP - 3 EP - 27 PB - Coppin CY - Deal AN - OPUS4-2420 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Österle, Werner A1 - Dmitriev, A.I. A1 - Orts Gil, Guillermo A1 - Schneider, Thomas A1 - Ren, H. A1 - Sun, X. T1 - Verification of nanometre-scale modelling of tribofilm sliding behaviour N2 - A model based on movable cellular automata has been applied to study the sliding behaviour of tribofilms formed during automotive braking. Since it is not possible yet to determine the composition of real tribofilms quantitatively, final verification of modelling results is needed. This was done by preparing artificial third bodies with compositions and nanostructures matching the ones assumed for modelling. Pin-on-disc tests were performed while applying the artificial third bodies to the contact. The results revealed that not only the structure of the third body but also the amount of the applied normal pressure determines the COF obtained by modelling and that much better correlation between experimental and modelling results was obtained while assuming high normal pressures at asperity contacts. KW - Automotive braking KW - Third body KW - Modelling KW - Sliding simulation PY - 2013 U6 - https://doi.org/10.1016/j.triboint.2013.02.018 SN - 0301-679X VL - 62 SP - 155 EP - 162 PB - Butterworth-Heinemann CY - Oxford AN - OPUS4-27946 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER - TY - JOUR A1 - Xu, F. A1 - Ren, H. A1 - Zheng, M. A1 - Shao, X. A1 - Dai, T. A1 - Wu, Y. A1 - Tian, L. A1 - Liu, Y. A1 - Liu, B. A1 - Günster, Jens A1 - Liu, Y. A1 - Liu, Y. T1 - Development of biodegradable bioactive glass ceramics by DLP printed containing EPCs/BMSCs for bone tissue engineering of rabbit mandible defects N2 - Bioactive glass ceramics have excellent biocompatibility and osteoconductivity; and can form direct chemical bonds with human bones; thus, these ceramic are considered as “Smart” materials. In this study, we develop a new type of bioactive glass ceramic (AP40mod) as a scaffold containing Endothelial progenitor cells (EPCs) and Mesenchymal stem cells (BMSCs) to repair critical-sized bone defects in rabbit mandibles. For in vitro experiments: AP40mod was prepared by Dgital light processing (DLP) system and the optimal ratio of EPCs/BMSCs was screened by analyzing cell proliferation and ALP activity, as well as the influence of genes related to osteogenesis and angiogenesis by direct inoculation into scaffolds. The scaffold showed suitable mechanical properties, with a Bending strength 52.7 MPa and a good biological activity. Additionally, when EPCs/BMSCs ratio were combined at a ratio of 2:1 with AP40mod, the ALP activity, osteogenesis and angiogenesis were significantly increased. For in vivo experiments: application of AP40mod/EPCs/BMSCs (after 7 days of in vitro spin culture) to repair and reconstruct critical-sized mandible defect in rabbit showed that all scaffolds were successfully accurately implanted into the defect area. As revealed by macroscopically and CT at the end of 9 months, defects in the AP40mod/EPCs/BMSCs group were nearly completely covered by normal bone and the degradation rate was 29.9% compared to 20.1% in the AP40mod group by the 3D reconstruction. As revealed by HE and Masson staining analyses, newly formed blood vessels, bone marrow and collagen maturity were significantly increased in the AP40mod/EPCs/BMSCs group compared to those in the AP40mod group. We directly inoculated cells on the novel material to screen for the best inoculation ratio. It is concluded that the AP40mod combination of EPCs/BMSCs is a promising approach for repairing and reconstructing large load bearing bone defect. KW - Three-dimensional Bone tissue engineering KW - Endothelial progenitor cell KW - Bone marrow-derived mesenchymal stem cell KW - Bioactive glass scaffold PY - 2020 U6 - https://doi.org/10.1016/j.jmbbm.2019.103532 SN - 1751-6161 VL - 103 SP - 103532 EP - 103532 PB - Elsevier Ltd. AN - OPUS4-50491 LA - eng AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany ER -