放电等离子烧结法制备TiC/SiC复合增强材料的研究  

Study on TiC/SiC reinforcement material by spark plasma sintering

作　　者：刘小红 王艳凤[1] 曹永娣[1] 刘建秀 王兵维 Liu Xiaohong;Wang Yanfeng;Cao Yongdi;Liu Jianxiu;Wang Bingwei(Yellow River Conservancy Technical Institute,Kaifeng 475000,Henan,China;Zhengzhou University of Light Industry,Zhengzhou 450000,Henan,China)

机构地区：[1]黄河水利职业技术学院,河南开封475000 [2]郑州轻工业大学,河南郑州450000

出　　处：《钢铁钒钛》2021年第6期153-157,共5页Iron Steel Vanadium Titanium

摘　　要：采用放电等离子烧结工艺,将不同用量的纳米SiC粉末与TiC颗粒相复合制备力学增强材料。分别对不同SiC粉末含量的试样进行SEM表征,对质量分数10%SiC的复合试样进行XRD测试。并着重分析探讨了SiC对复合材料在断裂韧性、导电性方面的影响及TiC对复合材料在材料密度和硬度方面的影响。结果表明:该复合增强材料内部晶粒细密化程度较高,结构缺陷度较低,SiC与TiC相容性优异。质量分数10%SiC样品中的各组分含量占比与XRD分析测试结果相一致,杂质衍射峰基本没有出现。SiC的加入对于复合材料断裂韧性和导电性的提升效果较为显著,30%SiC样品的断裂强度比单纯TiC材料高116%,平均电导率高约100倍。TiC的加入对于材料密度和硬度的提升作用较为良好,当TiC/SiC的含量之比为1.3∶1时,密度和硬度均达到最大值,分别为4.3 g/cm^(3)和68.3HRA。试验结果基本符合预期。Mechanical reinforcement materials were prepared by spark plasma sintering(SPS),using SiC nanopowder and TiC particles as raw materials.The composite samples with different SiC content were characterized by SEM,and the composite sample with 10%SiC was tested by XRD.The effects of SiC content on the fracture toughness,conductivity,density and hardness of the composites were discussed.The results show that the grains are refined in the TiC/SiC reinforcement samples with lower structural defects and excellent compatibility between SiC and TiC.The component content in the sample with 10%SiC coincides well with the XRD analysis result.Compared with those of the pure TiC material,the fracture strength of the sample with 30%SiC is increased by about 116%and the average conductivity is enhanced by about 100 times.At the TiC/SiC ratio of 1.3∶1,the maximum value of density(4.3 g/cm^(3))and hardness(68.3HRA)can be obtained.The experimental results is consistent with the expected goals.

关 键 词：SiC/TiC复合增强材料 放电等离子烧结 断裂韧性 导电性 硬度 耐磨性 

分 类 号：TF823[冶金工程—有色金属冶金] TF124