Ti(C,N)/AlCoCrFeNi金属陶瓷烧结过程中的粘结相表面富集行为研究<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.016.026

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Abstract Through the analysis of surface topography and phase composition of the alloy, the concentrating behavior of binder on the surface of Ti(C,N)/AlCoCrFeNi cermets during sintering process were studied. The results indicated that the binder was obviously concentrated on surface when sintered under 1 300 ℃ for 60 minutes, and formed a third phase containing M₆C-type brittle phase (η). This phenomenon could attribute to the carbon concentration difference, solid solution concentration difference and temperature difference of the surface and interior, which caused by decarbonization during sintering. It urged the migration of W, Ta, Ti, Mo to the interior in a diffusion way. Besides, the surface decarbonization also caused the increase of alloy eutectic temperature. Thus, the reduction of surface liquid phase leaded to the generation of negative pressure, which made the inner liquid phase transfer to the surface. In addition, binding phase regions with different volume content in the microstructure might lead to the pressure difference, and the rich W region was apt to migrate to the poor W region with low liquid phase during sintering, which caused the binding phase transfer, permeate and finally gathered on the surface.

Key words： Ti(C,N)-based cermets high entropy alloy binder concentrating behavior

Published: 07 May 2018

CLC number:

TG148

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	Articles by authors
	ZHU Gang
	CHEN Jialin
	JIA Hailong
	LIU Ying
	XIE Ming

Cite this article:

ZHU Gang,CHEN Jialin,JIA Hailong, et al. Study on Concentrating Behavior of Binder on Surface of Ti(C,N)/AlCoCrFeNi Cermets During Sintering[J]. Materials Reports, 2017, 31(16): 125-128.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.016.026 OR http://www.mater-rep.com/EN/Y2017/V31/I16/125

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