期刊
INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS
卷 115, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ijrmhm.2023.106323
关键词
NbC-Ni; Ball milling; Spark Plasma Sintering (SPS); Binder distribution; Cermet
This study reports the effect of ball milling time and sintering temperature on the microstructure, binder distribution, hardness, and indentation fracture toughness of NbC-Ni cermets synthesized using mechanical mixing (MM) and spark plasma sintering (SPS) method. Insufficient milling time resulted in inhomogeneous binder distribution in the consolidated cermets, while sintering above a certain temperature resulted in complete loss of binder. Therefore, a combination of sufficient milling time and an appropriate sintering temperature was essential to obtain a consolidated cermet with a homogeneous microstructure and uniform mechanical properties.
Niobium carbide (NbC) based cermets are emerging as strong contenders to replace conventional tungsten carbide (WC) based cermets for applications involving abrasion and wear resistance due to their superior mechanical, physical, and chemical properties. NbC cermets with various binders have been explored in literature and nickel has emerged as a promising candidate binder material. Mechanical mixing (MM) followed by spark plasma sintering (SPS) has been shown to be one of the effective methods to synthesize NbC-Ni cermets. However, the effect of certain crucial process parameters during the MM + SPS process on the end product have not been established. To address this, the present study reports the effect of ball milling time and the effect of sintering temperature on the microstructure, binder distribution, hardness, and indentation fracture toughness of NbC - 16 vol% Ni cermets synthesized using MM + SPS. Insufficient milling time resulted in inhomogeneous binder distribution in the consolidated cermets and sintering above a certain temperature resulted in complete loss of binder. Therefore, the combination of sufficient milling time and an appropriate sintering temperature was essential to obtain a consolidated cermet with homogeneous microstructure and uniform mechanical properties.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据