粉末冶金立方氮化硼聚晶材料的球磨混料工艺

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Abstract The operation law of ball mill and the mechanism of ball milling process were studied. The cubic boron nitride powders with different particle sizes were milled, and the particle size distribution and grain refinement rate before and after ball milling were analyzed by laser particle size analyzer. SEM and XRD were used to observe and analyze the powder and sintered samples to study the effect of ball milling process on the preparation of cubic boron nitride polycrystalline materials. The results show that, the horizontal planetary ball mill used for mixing process has a suitable rotation speed range. In this range, the higher the rotating speed is, the stronger the impact and grinding effect the ball will bear. The finer particles tend to agglomerate during ball milling, but the coarser the powder particles are, the higher the refining rate is. The coarse and fine mixed particles appear doping after mixing for 4 h. The longer the milling time, the higher the mixing uniformity and the more doping. The higher the rotating speed, the more significant the doping. The higher the rotation speed, the more significant the ball milling powder doping. The best wet milling mixing process of 2-8 μm fine powder is ball milling at 180 r/min for 12 h.

Key words： horizontal planetary ball mill ball milling mixing polycrystalline cubic boron nitride fineness rate particle agglomeration

Received: 07 July 2020 Published: 18 January 2021

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	TF122

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	XIE Hui
	DENG Fuming
	WANG Hao
	HAN Shunli
	FENG Fei

Cite this article:

XIE Hui,DENG Fuming,WANG Hao, et al. Ball milling mixing progress for preparation of polycrystalline cubic boron nitride composites[J]. Materials Science and Engineering of Powder Metallurgy, 2020, 25(5): 424-432.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2020/V25/I5/424

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