Ti(C,N)基金属陶瓷成分对抗热震性能的影响  

The effect of Ti(C,N)-Based Ceramic Composition on Thermal Shock Resistance

作　　者：赵玉玲[1,2] 但成[3] 余海洲 丰平[4] Zhao Yuling;Dan Cheng;Yu Haizhou;Feng Ping(State Key Laboratory of Cemented Carbide,Zhuzhou Hunan 412000,China;Zhuzhou Cemented Carbide Croup Co.,Ltd.,Zhuzhou Hunan 412000,China;Wuhan Zhenguang Technology Co.,Ltd.,Wuhan Hubei 430000,China;China Three Gorges University,Yichang Hubei 443002,China)

机构地区：[1]硬质合金国家重点实验室,湖南株洲412000 [2]株洲硬质合金集团有限公司,湖南株洲412000 [3]武汉振光科技有限公司,湖北武汉430000 [4]三峡大学,湖北宜昌443002

出　　处：《硬质合金》2023年第5期329-334,共6页Cemented Carbides

基　　金：国家自然科学基金(No.51304124);湖北省自然科学基金(No.2018CFB653)。

摘　　要：制备了不同碳氮比Ti(C,N)固溶体和分别加入NbC、TaC、VC、Cr_(3)C_(2)的Ti(C,N)基金属陶瓷,采用水淬冷热震方法研究了不同成分对Ti(C,N)基金属陶瓷抗热震性能的影响。结果表明:金属陶瓷在热冲击过程中,陶瓷相在热应力的作用下会发生开裂现象,在裂纹扩展路径上产生的微裂纹能促进裂纹扩展;在不同碳氮比的Ti(C_(x),N_(y))固溶体金属陶瓷中,碳氮比7/3的Ti(C_(0.7),N_(0.3))金属陶瓷的抗热震性能最好,本文研究中其热震临界温度为240℃;在添加的四种碳化物(NbC、TaC、VC和Cr_(3)C_(2))中,NbC和TaC能显著提升金属陶瓷的抗热震性,且TaC更优于NbC,而VC和Cr_(3)C_(2)的加入不利于改善金属陶瓷抗热冲击性能。Ti(C,N)solid solutions with different carbon and nitrogen(C/N)ratios and Ti(C,N)-based ceramics with NbC,TaC,VC,and Cr_(3)C_(2)added separately were prepared.The effects of different compositions on the thermal shock resistance of Ti(C,N)-based ceramics were studied by means of water quenching.The results show that the ceramic phase cracks are observed under the action of thermal stress during the thermal shock process of the ceramics,and the microcracks in the crack propagation path can promote crack propagation.Among Ti(C_(x),N_(y))solid solution ceramics with different C/N ratios,Ti(C_(0.7),N_(0.3))ceramic with a C/N ratio of 7/3 has the best thermal shock resistance,and the critical thermal shock temperature is 240℃.Among the four added carbides(NbC,TaC,VC,and Cr_(3)C_(2)),the thermal shock resistance of the ceramics is significantly improved by NbC and TaC,and TaC is better than NbC,while the addition of VC and Cr_(3)C_(2)is not conducive to the thermal shock resistance of the ceramics.

关 键 词：TI(C N)基金属陶瓷 抗热震性能 碳氮比 碳化物 

分 类 号：TB333[一般工业技术—材料科学与工程]