杨昊,周浩钧,陶洪亮,吴宁,尹育航,李益民,罗丰华

• 1:中南大学粉末冶金国家重点实验室
• 2:广东奔朗新材料股份有限公司

摘要(Abstract)：

采用真空烧结工艺制备了(56-x)Ti(C_(0.5), N_(0.5))-20WC-3.5Mo_2C-20(Co+Ni)-xCeO_2(x=0, 0.05%, 0.1%, 0.2%)系列金属陶瓷,研究了CeO_2添加量对Ti(C,N)基金属陶瓷显微结构和力学性能的影响。结果表明:添加适量的CeO_2有利于Ti(C,N)金属陶瓷显微组织细化,使硬质相颗粒尺寸减小,而且分布更加均匀,从而提高其力学性能。此外,添加CeO_2后金属陶瓷中裂纹扩展过程产生较多的桥接现象,使其具有较高的断裂韧性。随着CeO_2添加量增加,Ti(C, N)金属陶瓷的密度和力学性能先增大后减小,CeO_2添加量为0.1%时,金属陶瓷的密度、硬度、抗弯强度和断裂韧性分别为6.51 g/cm~3、91.6 HRA、1577 MPa和9.11 MPa·m~(1/2)。

关键词(KeyWords)： Ti(C,N)金属陶瓷;CeO_2;显微结构;力学性能

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 杨昊,周浩钧,陶洪亮,吴宁,尹育航,李益民,罗丰华

DOI: 10.13289/j.issn.1009-6264.2021-0129

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