| 后热处理对C_f/ZrC复合材料微观结构及性能的影响 |
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| 引用本文： | 陈红梅,祝玉林,王松.后热处理对C_f/ZrC复合材料微观结构及性能的影响[J].材料工程,2017,45(8). |
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| 作者姓名： | 陈红梅 祝玉林 王松 |
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| 作者单位： | 1. 湖南涉外经济学院机械工程学院,长沙410205;国防科学技术大学新型陶瓷纤维及其复合材料重点实验室,长沙410073;2. 国防科学技术大学新型陶瓷纤维及其复合材料重点实验室,长沙,410073 |
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| 基金项目： | 2014年湖南省教育厅科学规划一般项目 |
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| 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%。
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| 关 键 词： | Cf/ZrC复合材料 热处理 微观结构 性能 |
Effect of Post Heat Treatment on Microstructure and Properties of Cf/ZrC Composites |
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| CHEN Hong-mei,ZHU Yu-lin,WANG Song.Effect of Post Heat Treatment on Microstructure and Properties of Cf/ZrC Composites[J].Journal of Materials Engineering,2017,45(8). |
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| Authors: | CHEN Hong-mei ZHU Yu-lin WANG Song |
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| Abstract: | Carbon fiber reinforced zirconium carbide ceramic matrix composites (Cf/ZrC) were fabricated by reactive melt infiltration at relative low temperature,C/C composites as substrate,Zr2 Cu 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 residual 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 decrease after post heat treatments.The flexural strength retention rate of the composites is only 52.3％,when the heat treatment temperature reaches 2200℃. |
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| Keywords: | Cf/ZrC composite heat treatment microstructure property |
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