Effect of Ni contents on mechanical properties and corrosion behavior of Ti (C,N)-WC-Mo2C-(Ni,Co) cermets

被引：24
作者：
Xu, L. W. [1 ]
Lin, N. [1 ]
Zhao, L. B. [1 ]
Ma, C. [1 ]
Wang, Z. Y. [1 ]
He, Y. H. [2 ]
机构：
[1] Hunan Univ, Coll Mat Sci & Engn, Hunan Prov Key Lab Spray Deposit Technol & Applic, Changsha 410082, Hunan, Peoples R China
[2] Cent South Univ, State Key Lab Powder Met, Changsha 410083, Peoples R China
来源：
MATERIALS CHEMISTRY AND PHYSICS | 2020年 / 252卷
基金：
中国国家自然科学基金;
关键词：
Cermet; Nickel addition; Mechanical properties; Corrosion behavior; XPS; ELECTROCHEMICAL-BEHAVIOR; TI(C; N)-BASED CERMETS; OXIDATION BEHAVIOR; SECONDARY CARBIDES; EROSIVE WEAR; MICROSTRUCTURE; XPS; WC; MOLYBDENUM; MO;
D O I：
10.1016/j.matchemphys.2020.123253
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The mechanical properties and corrosion behavior of Ti(C,N)-WC-Mo2C-(Ni,Co) cermets with different Ni/Co ratios were investigated by mechanical property tests, scanning electron microscope, abrasion resistance test, electrochemical measurements, X-ray photoelectron spectroscopy. The results showed the increasing Ni content caused the improvement of fracture toughness and the reduction of hardness and abrasion resistance. Electrochemical tests indicated that the proper Ni addition in cermet may enhance the corrosion resistance with cermet in HCl and NaOH solution. The corrosion behavior of cermet was mainly determined by the selective dissolution of the binder phase and the formation of oxides on corroded surface. Moreover, the improving corrosion resistance of cermet in NaOH solution can be attribute to a dense passive film oxidized from binder phase. Hence, cermet with an appropriate ratio may be considered as promising structural material in complicated application with acid or alkali solution.
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页数：9
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