(Ti,W,Mo,Ta,Nb,Zr)(C,N)-(Co,Ni)基金属陶瓷的烧结致密化过程  

Sintering Densification Process of(Ti,W,Mo,Ta,Nb,Zr)(C,N)-(Co,Ni) Based Cermet

作　　者：项忠楠[1,3] 李战江 常发 戴品强 Xiang Zhongnan;Li Zhanjiang;Chang Fa;Dai Pinqiang(Fuzhou University,Fuzhou 350116,China;Xiamen Tungsten Co.,Ltd,Xiamen 361009,China;Fujian University of Technology,Fuzhou 350118,China;Fujian Provincial Key Laboratory of New Material Preparation and Forming Technology,Fuzhou 350118,China;College of Materials Science and Engineering,Fujian University of Technology,Fuzhou 350118,China)

机构地区：[1]福州大学材料科学与工程学院,福建福州350116 [2]福州大学,福建福州350116 [3]厦门钨业股份有限公司,福违厦门361009 [4]福建工程学院,福建福州350118 [5]福建省新材料制备与成形技术重点实验室,福建福州350118

出　　处：《稀有金属材料与工程》2020年第10期3562-3568,共7页Rare Metal Materials and Engineering

基　　金：福建省科技重大专项(2017HZ0001-1);福建省高校产学合作项目(2019H6022)。

摘　　要：研究了(Ti,W,Mo,Ta,Nb,Zr)(C,N)-(Co,Ni)基金属陶瓷材料烧结致密化过程,烧结过程中金属陶瓷的成分、组织结构和性能的变化,初步探讨烧结工艺对成分、组织结构和性能的影响。研究结果表明:(Ti,W,Mo,Ta,Nb,Zr)(C,N)-(Co,Ni)基金属陶瓷致密化过程中,合金因烧结而引起的质量损失在液相出现前的固相烧结阶段基本结束;而1340℃以后,由于液相的出现,合金的体积收缩和密度急剧上升。烧结过程中氮含量的变化趋势与合金磁性能的变化趋势一致,金属陶瓷合金成分中氮含量的变化对合金固溶体的形成有显著的影响。在1490℃烧结温度下,(Ti,W,Mo,Ta,Nb,Zr)(C,N)-(Co,Ni)基金属陶瓷的综合力学性能最佳,而通过合适的N2分压烧结工艺,可以实现对(Ti,W,Mo,Ta,Nb,Zr)(C,N)-(Co,Ni)基金属陶瓷强韧性的进一步提升。The sintering densification process of(Ti,W,Mo,Ta,Nb,Zr)(C,N)-(Co,Ni)based cermet was studied.The effects of sintering process on composition,microstructure and properties were discussed.The results show that during the densification process of(Ti,W,Mo,Ta,Nb,Zr)(C,N)-(Co,Ni)based cermets,the mass loss caused by sintering basically ends at the solid phase sintering stage.When the sintering temperature is above 1340℃,the volume shrinkage and density of the alloy increase sharply due to the appearance of liquid phase.The change of nitrogen content in cermet during the sintering process is consistent with the change of magnetic properties of the alloy,and the nitrogen content has a significant effect on the formation of solid solution.When the sintering temperature is 1490℃,the comprehensive mechanical properties of(Ti,W,Mo,Ta,Nb,Zr)(C,N)-(Co,Ni)based cermets are the best,and the strength and toughness of the cermets can be further improved by the appropriate control of N2 partial pressure at sintering temperature.

关 键 词：金属陶瓷 烧结温度 成分 组织结构 强韧性 

分 类 号：TG148[一般工业技术—材料科学与工程]