摘要
以C/C复合材料为基材、Zr_2Cu合金为渗剂,采用低温反应熔渗工艺制备得到碳纤维增强碳化锆陶瓷基复合材料(Cf/ZrC),重点研究后热处理对Cf/ZrC复合材料微观结构及性能的影响。结果表明:经1400~2200℃热处理后,材料密度下降,开孔率增大;材料在后热处理过程中会发生残余富铜熔体的流失、ZrC基体体积分数的增加以及ZrC基体结构的破坏;后热处理造成材料力学性能下降,热处理温度达到2200℃时,材料的弯曲强度保留率仅为52.3%。
Carbon fiber reinforced zirconium carbide ceramic matrix composites （Cf/ZrC） were fabrica-ted by reactive melt infiltration at relative low temperature, C/C composites as substrate, Zr2Cu alloy as infiltrator. Effect of post heat treatment on microstructure and properties of Cf/ZrC composites was investigated. The results show that after different temperature heat treatments at 1400-2200..,the density of the composites decreases, and the porosity increases. During post heat treating, the residu-al copper rich melt in the composites evaporates, the volume fraction of ZrC matrix increases and the damage to the microstructure of ZrC matrix occurs. The mechanical properties of the composite de-crease after post heat treatments. The flexural strength retention rate of the composites is only 52. 3 % , when the heat treatment temperature reaches 2200℃.
出处
《材料工程》
EI
CAS
CSCD
北大核心
2017年第8期43-48,共6页
Journal of Materials Engineering
基金
2014年湖南省教育厅科学规划一般项目(14c0663)
