Microstructure Characterization and Wear-Resistant Properties Evaluation of an Intermetallic Composite in Ni–Mo–Si System

Materials

Boyuan Huang¹  Yang Liu²  Yongliang Gui³  Chunyan Song³ 

[1] School of Materials Science and Engineering, Southwest Petroleum University, Chengdu 610500, China;School of Mechanical Engineering, University of Science and Technology Beijing, Beijing 100083, China;School of Metallurgy and Energy, North China University of Science and Technology, Tangshan 063009, China;

关键词: intermetallic compound;    microstructure;    wear-resistance;    abrasive wear;   

DOI  :  10.3390/ma10020130

来源: DOAJ

【 摘 要 】

Intermetallic compounds have been studied for their potential application as structural wear materials or coatings on engineering steels. In the present work, a newly designed intermetallic composite in a Ni–Mo–Si system was fabricated by arc-melting process with commercially pure metal powders as starting materials. The chemical composition of this intermetallic composite is 45Ni–40Mo–15Si (at %), selected according to the ternary alloy diagram. The microstructure was characterized using optical microscopy (OM), scanning electron microscopy (SEM), X-ray diffraction (XRD), and energy dispersive spectroscopy (EDS), and the wear-resistant properties at room temperature were evaluated under different wear test conditions. Microstructure characterization showed that the composite has a dense and uniform microstructure. XRD results showed that the intermetallic composite is constituted by a binary intermetallic compound NiMo and a ternary Mo2Ni3Si metal silicide phase. Wear test results indicated that the intermetallic composite has an excellent wear-resistance at room-temperature, which is attributed to the high hardness and strong atomic bonding of constituent phases NiMo and Mo2Ni3Si.

【 授权许可】

Unknown