电火花-超声复合技术制备镍微米空心球的研究<sup>*</sup>

doi:10.11896/j.issn.1005-023X.2017.014.015

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Abstract Based on technology of ultrasonication-aided spark discharge process, the growing process of Ni particles eroded by spark discharge on the bubble surfaces was investigated. The bubbles induced by spark discharge and ultrasonication-induced cavita-tion effect served as templates. The formation mechanism of Ni hollow microspheres by ultrasonication-aided spark discharge was interpreted through analyzing the morphology of samples from SEM. Nitrogen pycnometer density analyzer and tapping density analyzer were used to test the effective and tapping densities of each sample. The effect of ultrasonication on the hollow ratio of Ni particles was studied through comparing the change of effective density on different experimental conditions. The forming process of hollow spheres based on the theory of liquid phase base metal film was expounded. Meanwhile, the effect of ultrasonication on morpho-logy also was investigated through analyzing the values of tapping and losing density. Additional, the Hausner ratio was calculated to explain the liquidity of hollow particles. The results showed that the hollow ratio increase of 10%-20%, and the mobility of the particles was improved by applying ultrasonication.

Key words： ultrasound-aided spark discharge bubble Ni hollow microspheres effective density hollow ratio

Published: 04 May 2018

CLC number:

TG146

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	Articles by authors
	ZHAO Zhankui
	LI Xianglong
	LIU Yifan
	ZHU Kunlun

Cite this article:

ZHAO Zhankui,LI Xianglong,LIU Yifan, et al. Preparation of Nickel Hollow Microspheres by Ultrasonication-aided Spark Discharge[J]. Materials Reports, 2017, 31(14): 72-76.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2017.014.015 OR http://www.mater-rep.com/EN/Y2017/V31/I14/72

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