Paper Title:

Characteristics and Mechanisms of Dynamic Oxidation for ZrB2-SiC Based UHTC

Periodical Key Engineering Materials (Volumes 368 - 372)
Main Theme High-Performance Ceramics V
Edited by Wei Pan and Jianghong Gong
Pages 1722-1726
DOI 10.4028/www.scientific.net/KEM.368-372.1722
Citation Jie Cai Han et al., 2008, Key Engineering Materials, 368-372, 1722
Online since February, 2008
Authors Jie Cai Han, Ping Hu, Xing Hong Zhang, Song He Meng
Keywords Oxidation Mechanism, Silicon Carbide (SiC), Ultra-High Temperature Ceramics (UHTC), ZrB2
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Abstract

The present study focuses on the dynamic oxidation resistance of five representative ZrB2-SiC based ultra-high temperature ceramics (UHTCs): ZrB2-SiC, ZrB2-SiC-Si3N4, ZrB2-SiC-TiB2, ZrB2-SiCHfB2 and ZrB2-SiC-ZrC using oxyacetylene torch and arc jet testing. The effects of second phase incorporation (Si3N4, TiB2, HfB2, ZrC) on oxidation resistance were compared and analyzed. The mechanism of oxidation based on experimental results and thermodynamic calculations were explored. Some approaches to improvement of oxidation resistance and future directions of UHTC are also presented.