刘爱军,刘宁.二次颗粒尺寸和添加WC对双结构金属陶瓷组织和性能的影响[J].稀有金属材料与工程,2019,48(2):375~384.[Aijun Liu,Ning Liu.Effect of granule size and WC content on the microstructure and mechanical properties of double Ti(C,N) based cermets[J].Rare Metal Materials and Engineering,2019,48(2):375~384.]
二次颗粒尺寸和添加WC对双结构金属陶瓷组织和性能的影响
投稿时间:2017-08-25  修订日期:2017-11-22
中文关键词:  双结构金属陶瓷,组织,力学性能,韧化机理
基金项目:
中文摘要:
      研究了二次颗粒尺寸和添加WC对双结构金属陶瓷组织和力学性能的影响,结果表明二次颗粒均匀地分布在基体中,随着添加WC含量的增加,组织中白芯灰壳结构和无芯结构增加。组织中发现了一种新的四层复合结构的硬质相。随着二次颗粒尺寸的增加,材料的断裂韧性提高,但抗弯曲度和硬度下降,而提高WC加入量,断裂韧性和抗弯曲度提高,但硬度有所下降。更高的断裂韧性主要归功于裂纹的分叉、桥接、偏转、微裂纹以及二次颗粒的拔出效应。
Effect of granule size and WC content on the microstructure and mechanical properties of double Ti(C,N) based cermets
英文关键词:Double  Ti(C,N) based  cermets, microstructure, mechanical  properties,
英文摘要:
      Effect of starting granule size and addition of WC on the microstructure and mechanical properties of double Ti(C,N) based cermets was investigated. Results show that the Ti(C,N) based cermets granules distribute in the matrix homogeneously. The amount of hard phases with the white core/grey rim and coreless structures in the matrix increases by increasing WC content. A new phase with the four layer composite structures was also found. With the increase of granules size, the fracture toughness increases, while the transverse rupture strength (TRS) and hardness have an opposite trend. With the increase of WC, the fracture toughness and TRS increase, while the hardness decreases. Higher fracture toughness of double Ti(C,N) based cermets is mainly owing to the branch, bridge and deflection of crack, the formation of micro-cracks at the nearby of the tip of main crack and the pull-out effect of granules.
作者单位E-mail
刘爱军 合肥工业大学材料学院 447617835@qq.com 
刘宁 合肥工业大学 2042845889@qq.com 
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