Processing route dramatically influencing the nanostructure of carbon-rich SiCN and SiBCN polymer-derived ceramics. Part I: Low temperature thermal transformation |
| |
| Authors: | Yan Gao Gabriela Mera Hong Nguyen Koji Morita Hans-Joachim Kleebe Ralf Riedel |
| |
| Affiliation: | 1. Technische Universität Darmstadt, Fachbereich Material- und Geowissenschaften, Petersenstrasse 23, Darmstadt D-64287, Germany;2. National Institute for Materials Science, Materials Engineering Laboratory, Tsukuba, Ibaraki, Japan;3. Technische Universität Darmstadt, Institut für Angewandte Geowissenschaften, Schnittspahnstraße 9, D-64287 Darmstadt, Germany;1. Department of Materials Science and Engineering, College of Materials, Xiamen University, Xiamen, Fujian 361005, China;2. Advanced Materials Processing and Analysis Center, University of Central Florida, Orlando, FL 32816, USA;3. Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China;1. Institute for Advanced Ceramics, School of Materials Science and Engineering, Harbin Institute of Technology, Heilong Jiang, Harbin 150080, China, China;2. State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Heilong Jiang, Harbin 150001, China, China |
| |
| Abstract: | In this study, the significant effect of the processing route on the nanostructure evaluation of carbon-rich SiCN and SiBCN polymer-derived ceramics is reported. For the first time, bulk carbon-rich SiCN and SiBCN ceramics are successfully produced by warm pressing of polyphenylvinylsilylcarbodiimide and polyborophenylsilylcarbodiimide. The bulk samples were compared with their analogous powder samples with respect to the developed nanostructure. Representative temperatures of 1100 and 1400 °C were chosen in order to investigate the effect of processing route used on the crystallization behavior of those samples. As the solid-state structure of polymer-derived ceramics (PDCs) is highly sensitive to the molecular structure of the precursor, the variation of processing route and pyrolysis temperature during the polymer to ceramic transformation and decomposition enables to alter the nanostructure of PDCs. It was found that the bulk carbon-rich SiCN and SiBCN ceramics show an improved thermal stability against crystallization as compared to their powder analogues. |
| |
| Keywords: | |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
