The reciprocating wear behaviour of TiC-Ni₃Al cermets

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• 作者：S. Buchholz ; Z.N. Farhat ; G.J. Kipouros ; K.P. Plucknett ; ^{kevin.plucknett@dal.ca}
• 关键词：Ceramic-metal composites ; Cermet ; Profilometry ; Hardness ; Indentation fracture resistance
• 刊名：International Journal of Refractory Metals and Hard Materials
• 出版年：2012
• 期刊代码：91_02634368
• 类别：et
• 出版时间：July, 2012
• 卷：33
• 期：Complete
• 页码：44-52
• 文件大小：2861 K

摘要

TiC-based cermets have become more popular as a replacement to traditional WC-Co 鈥榟ardmetals鈥?due to their superior mechanical properties at elevated temperatures, improved corrosion resistance and significantly lower density. The current study assesses the reciprocating wear response of TiC-Ni₃Al cermets fabricated by melt infiltration, with Ni₃Al binder contents ranging from 20 to 40 vol.%. Wear testing was performed using a ball-on-flat geometry, with a WC-Co sphere used as the counter-face material. It is demonstrated that the cermets are affected by similar wear mechanisms for each of the binder contents, but displayed the lowest wear when prepared with 30 vol.%Ni₃Al. Additionally, the 40 vol.%samples displayed a clear transitional behaviour, with an improved wear resistance comparable to the 30 vol.%samples at low applied loads, but a degraded wear response comparable to the 20 vol.%samples at high applied loads.