Effect of Mn addition on the microstructure, interface structure and mechanical properties of MoCoB-Co cermets prepared by in-situ synthesis

被引：5

作者：

Yang, Guoqiang ^{[1
]}

Zhang, Jianyu ^{[1
]}

Chen, Yayu ^{[1
]}

Zeng, Hongtao ^{[1
]}

Zhao, Leijie ^{[1
]}

Wang, Yanhui ^{[1
]}

Yin, Haiqing ^{[2
]}

机构：

[1] Hebei Univ Engn, Sch Mech & Equipment Engn, Handan 056038, Peoples R China

[2] Univ Sci & Technol Beijing, Collaborat Innovat Ctr Steel Technol, Beijing 100083, Peoples R China

来源：

CERAMICS INTERNATIONAL | 2023年 / 49卷 / 10期

关键词：

MoCoB; Cermet; In-situ synthesis; Interface; Mechanical properties; CR-MO ALLOY; EPSILON-MARTENSITE; TRANSFORMATION; PHASE;

D O I：

10.1016/j.ceramint.2023.02.009

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

MoCoB-Co cermets with different Mn contents were synthesized using an in-situ sintering reaction, and the effect of Mn addition on the microstructure, interfaces, and mechanical properties was investigated. The addition of Mn inhibited the transition of the binder phase from fcc to hcp. Adding an appropriate Mn can increase the density of the material and refine the hard phase grain. With increasing Mn content, the hardness decreased marginally and then gradually increased, and the transverse rupture strength (TRS) and fracture toughness (KIC) gradually decreased. The cermet with 6 wt% Mn addition had the smallest grain size and lower porosity. The hardness of the cermet increased from HRA 89.0 to HRA 91.7. The interface bonding strength of MoCoB/hcp-Co is higher than that of MoCoB/fcc-Co. After isothermal aging treatment, the content of hcp-Co in the binder phase increased markedly; thus, the KIC and TRS increased from 11.3 MPa m1/2 and 1200 MPa-13.3 MPa m1/2 and 1750 MPa, respectively.

引用

页码：16477 / 16485

页数：9

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