Mechanical and tribological properties of polymer-derived Si/C/N sub-millimetre thick miniaturized components fabricated by direct casting

被引:17
作者
Bakumov, Vadym [1 ]
Blugan, Gurdial [1 ]
Roos, Sigfried [2 ]
Graule, Thomas [1 ]
Fakhfouri, Vahid [3 ]
Grossenbacher, Jonas [3 ]
Gullo, Maurizio [3 ]
Kiefer, Thomas [3 ]
Brugger, Juergen [3 ]
Parlinska, Magdalena [4 ]
Kuebler, Jakob [1 ]
机构
[1] Empa, Swiss Fed Labs Mat Sci & Technol, Lab High Performance Ceram, CH-8600 Dubendorf, Switzerland
[2] Empa, Swiss Fed Labs Mat Sci & Technol, Lab Nanoscale Mat Sci, CH-8600 Dubendorf, Switzerland
[3] Ecole Polytech Fed Lausanne, Microsyst Lab, CH-1015 Lausanne, Switzerland
[4] Empa, Swiss Fed Labs Mat Sci & Technol, Electron Microscopy Ctr, CH-8600 Dubendorf, Switzerland
关键词
Shaping; Nanocomposites; Strength; Carbon; Wear parts; CERAMIC MICROPARTS; BEHAVIOR; FILMS; MEMS;
D O I
10.1016/j.jeurceramsoc.2012.01.007
中图分类号
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The utilization of silicon-based polymers as a source of amorphous non-oxide ceramics obtained upon pyrolytic treatment of them is increasingly gaining attention in research and is currently expanding into the field of commercial products. This work is focused on the near-net shaped fabrication, mechanical and tribological properties of a polymer-derived Si/C/N system. Small sub-millimetre thick ceramic test discs and bars were fabricated by casting of polysilazane and/or polycarbosilane precursor mixtures into elastomeric polydimethylsiloxane forms, thermal cross-linking and subsequent pyrolysis. Additional carbon was introduced on the molecular level using triphenylvinylsilane as the precursor, its cross-linking with the polymers via hydrosilylation prohibits phase separation of graphite within. the amorphous matrix. The characteristic strength of nearly 700 MPa along with stable low friction coefficients in sliding against similar polymer-derived ceramics testifies to their potential in micro electro mechanical system applications. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码:1759 / 1767
页数:9
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