Oxidation of Short Carbon Fiber Reinforced ZrB2-SiC Ceramics under Atmospheric and Oxyacetylene Torch Conditions

摘要：

　　The oxidation behavior ofZrB2-20 vol.% SiC (ZS) and ZrB2-20 vol.% SiC containing 20 vol.% short carbon fiber (ZSC) was studied using thermal gravimetric analysis and oxyacetylene torch test.It was shown that weight gains changed from 3.71 wt.% for ZS to 4.57 wt.% for ZSC after heating 10℃ /rain to 1450℃ in air.A thin layer of Si-rich glass and then a depletion layer of SiC was found on the cross section of both materials and carbon fiber of ZSC exposed in air was oxidized.Under oxyacetylene,an average mass loss of 0.8 vet.% for ZS and 0.9 wt.% for ZSC was measured after 180 seconds.After exposure,an oxidized layer with the formation of ZrO2 and SiO2 was found on the surface of both materials.Meanwhile,fiber in the surface of ZSC appeared oxidized and removed.

关键词： Short carbon fiber ZrB2-based UHTCs Oxidation Microstructure

作者: Yang Fei-yu Zhang Xing-hong Du Shan-yi

作者单位: Center for Composite Materials and Structures,Harbin Institute of Technology,Harbin 150001,China

会议类型: 国际会议

会议名称: The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))

会议地点: 长沙

会议语种:英文

页码: 1753-1755

在线出版日期: 2007-05-10（万方平台首次上网日期，不代表论文的发表时间）