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	反应热压烧结制备SiC/ZrB_2复相陶瓷及其性能表征
	魏红康 ; 邓翔宇 ; 汪长安 ; 刘美景 ; WEI Hong-kang ; DENG Xiang-yu ; WANG Chang-an ; LIU Mei-jing
	2016-03-30 ; 2016-03-30
关键词	二硼化锆 碳化硅 反应热压烧结 力学性能 ZrB2 SiC reactive hot press sintering mechanical property TQ174.1
其他题名	Preparation and Performance Characterization of SiC/ZrB_2 Multiphase Ceramics by Reactive Hot Press Sintering
中文摘要	以二硼化锆、硅和活性碳为原材料,在1850℃、20 MPa条件下,采用反应热压烧结工艺制备出了SiC/ZrB2陶瓷基复合材料。研究了添加剂(硅和活性碳)含量对ZrB2陶瓷烧结行为和力学性能的影响。借助X射线衍射和扫描电镜分析了复合材料的物相组成和微观结构。研究结果表明:添加剂可以显著提高复合材料的烧结致密度和力学性能。复合材料的XRD衍射图谱中只有ZrB2和SiC的衍射峰。当添加剂含量为12wt%时,复合材料的弯曲强度和断裂韧性分别达到584 MPa和7.25 MPa·m1/2。显微结构分析表明,致密度的提高、晶粒粒径的减小以及断裂模式的转变是复合材料力学性能提高的主要原因。; SiC /ZrB2ceramic matrix composites were prepared by reactive hot pressing at 1850 ℃ under 20 MPa with zirconium diboride,silicon,activated carbon as raw materials. The effects of sintering additives( silicon and activated carbon) content on sintering behavior and mechanical properties of ZrB2 were studied. Phase composition and microstructure of the composites were analyzed by XRD and SEM, respectively. The results indicate that the sintering additives could significantly improve the densities and mechanical properties of the composites. Only the diffraction peaks of ZrB2and SiC were found in the Xray diffraction patterns of the hot-pressed ceramics. For the specimen with sintering additives content of 12wt%,flexural strength of 584 MPa and fracture toughness of 7. 25 MPa·m1 /2were obtained. It seems that the improvement in mechanical properties was attributed to the improvement of density,the decrease of grain size and the change of fracture mode.
语种	中文 ; 中文
内容类型	期刊论文
源URL	[http://ir.lib.tsinghua.edu.cn/ir/item.do?handle=123456789/141866]
专题	清华大学
推荐引用方式 GB/T 7714	魏红康,邓翔宇,汪长安,等. 反应热压烧结制备SiC/ZrB_2复相陶瓷及其性能表征[J],2016, 2016.
APA	魏红康.,邓翔宇.,汪长安.,刘美景.,WEI Hong-kang.,...&LIU Mei-jing.(2016).反应热压烧结制备SiC/ZrB_2复相陶瓷及其性能表征..
MLA	魏红康,et al."反应热压烧结制备SiC/ZrB_2复相陶瓷及其性能表征".(2016).

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