Article ID Journal Published Year Pages File Type
1477591 Journal of the European Ceramic Society 2008 5 Pages PDF
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.

Related Topics
Physical Sciences and Engineering Materials Science Ceramics and Composites
Authors
, , , , ,