Microstructure, mechanical properties, and corrosion resistance of Mo2(Fe, Ni)B2-based cermets prepared by reaction boronizing sintering. Issue 22 (15th November 2021)

• Record Type: Journal Article
• Authors: Han, Zishen; Gong, Ao; Zheng, Yong; Wu, Hao; Xue, Chaogang; Li, Xiaoyu; Yang, Huimin
• Is Part Of: Ceramics international. Volume 47:Issue 22(2021)
• Page Start: 31567
• Page End: 31573
• Publication Date: 2021-11-15
• Subjects: Cermets -- Microstructure characteristic -- Mo2(Fe, Ni)B2 -- Corrosion resistance; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.08.036
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Mo2 (Fe, Ni)B2 -based cermets were successfully prepared by reaction boronizing sintering strategy, and their phase transformation, microstructure evolution, mechanical properties, and corrosion resistance were investigated. Mo2 (Fe, Ni)B2 was formed by the reaction between (Fe, Ni)2 B and Mo during solid-phase sintering. In the temperature range of 1010–1270 °C, extremely rapid densification occurred, and nearly full densification was obtained at the sintering temperature of 1270 °C. Mo2 (Fe, Ni)B2 -based cermets demonstrated superior mechanical properties with transverse rupture strength of 2140 ± 35 MPa, Rockwell hardness of 83.9 ± 0.1 HRA, and fracture toughness of 22.5 ± 0.6 MPa m 1/2 . Moreover, corrosion current density of Mo2 (Fe, Ni)B2 -based cermets was about four orders of magnitude lower than that of Mo2 FeB2 -based cermets, which indicates excellent corrosion resistance.