TiC含量对无压液相烧结SiC-TiC陶瓷复合材料结构和性能的影响
Effect of TiC Content on Structure and Properties of SiC-TiC CeramicComposites by Pressureless Liquid Phase Sintering
摘 要
以SiC粉体和TiC粉体为原料，Al2O3-Y2O3为烧结助剂，采用无压液相烧结技术制备了SiC-TiC陶瓷复合材料，研究了TiC体积分数（35%~45%）对其微观结构和性能的影响。结果表明：陶瓷复合材料的物相组成均为SiC、TiC、YAG （Y3Al5O12）和YAM （Y4Al2O9）；随着TiC含量的增加，TiC颗粒逐渐形成连续网络结构，陶瓷复合材料的开口气孔率先减小后增大，相对密度、抗弯强度、断裂韧度和维氏硬度均先升高后降低，体积电阻率降低。当TiC体积分数为40%时，陶瓷复合材料具有优异的综合性能，其相对密度、开口气孔率、抗弯强度、断裂韧度、维氏硬度、体积电阻率分别为98.1%，0.28%，429 MPa，5.87 MPa·m1/2，26 GPa，1.66×10-5Ω·m。
无压液相烧结
微观结构
性能
SiC-TiC ceramic composite
pressureless liquid phase sintering
microstructure
property
Abstract
Taking SiC powder and TiC powder as raw materials, Al2O3-Y2O3 as sintering aid, SiC-TiC ceramic composites were prepared by pressureless liquid phase sintering, and the effect of TiC content (35vol%-45vol%) on the microstructure and properties of the ceramic composites was studied. The results show that the phase composition of the ceramic composites was SiC, TiC, YAG(Y3Al5O12)and YAM(Y4Al2O9). With increasing TiC content, TiC particles were formed to be a continuous network structure gradually; the open porosity of the ceramic composites decreased first and then increased, the relative density, flexural strength, fracture toughness, Vickers hardness and volume resistivity increased first and then decreased, and the volume resistivity decreased. When the TiC content was 40vol%, the ceramic composites had the excellent comprehensive properties, and the relative density, open porosity, flexural strength, fracture toughness, Vickers hardness and volume resistivity were 98.1%, 0.28%, 429 MPa, 5.87 MPa·m1/2, 26 GPa and 1.66×10-5 Ω·m, respectively.
中图分类号 TQ174 DOI 10.11973/jxgccl202210006
所属栏目 试验研究
基金项目 辽宁省自然科学基金资助项目（2019-MS-126）；国家重点研发计划项目（2017YFB0310300）；国家自然科学基金资助项目（51602041，51772048）；装备预先研究项目（41422010905，41422010903）
收稿日期 2021/8/14
修改稿日期 2022/8/25
网络出版日期
作者单位点击查看
备注韩凌锋(1995-),男,河南洛阳人,硕士研究生导师:茹红强教授;张翠萍讲师
引用该论文: HAN Lingfeng,ZHAO Yiliang,ZHANG Cuiping,YUE Xinyan,RU Hongqiang,WANG Wei. Effect of TiC Content on Structure and Properties of SiC-TiC CeramicComposites by Pressureless Liquid Phase Sintering[J]. Materials for mechancial engineering, 2022, 46(10): 34～38
韩凌锋,赵义亮,张翠萍,岳新艳,茹红强,王伟. TiC含量对无压液相烧结SiC-TiC陶瓷复合材料结构和性能的影响[J]. 机械工程材料, 2022, 46(10): 34～38
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