Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1477591 | Journal of the European Ceramic Society | 2008 | 5 Pages |
Abstract
Combustion synthesis (CS) of Si3N4 with the addition of polytetrafluoroethylene (PTFE) was carried out at a relatively low N2 pressure of 2 MPa. It was found that the additive PTFE promoted the nitridation of Si. The α-Si3N4 contents in the periphery of the combustion-synthesized products showed great dependence on the contents of PTFE added in the reactants, which reached 77.7 wt.% with 4 wt.% PTFE addition. The residual silicon in the center of the combustion-synthesized products could be completely nitrided by further heat treatment at 1300 °C for 1 h in N2. The temperature difference between the center and the edge of the samples was responsible for the discrepancy in both phase composition and morphology of the products.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Yixiang Chen, Zhiming Lin, Jiangtao Li, Jisheng Du, Shuliang Yang,