真空氮气雾化法制备3D打印Cu6AlNiSnInCe仿金粉末及表征

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Abstract A novel Cu6AlNiSnInCe imitation-gold powder for 3D printing was fabricated by vacuum gas atomization. And its color, morphology, particle size distribution and microstructure were characterized by using spectrophotometer, scanning electron microscopy (SEM), laser particle size analyzer, laser particle shape analyzer and DTA. The formability of specimens was also studied in selective laser melting (SLM). The results show that the color difference ΔE between Cu6AlNiSnInCe powder and pure gold is 28.9; the 80% (volume fraction) of the powder roundness fitting rate up to 85%, the 60% of the powder bluntness fitting rate up to 70%, and the shape of the powder particles are spherical or nearly spherical, the fluidity of powder is 16 s/50 g, apparent density is 4.39 g/cm³, tap-density is 4.67 g/cm³, average oxygen content is 0.01%. The yield of powder with particle size between 15 and 53 μm is 40%. The microstructure of the powders is composed of cellular and dendritic grains, which is a matrix of α-Cu solid solution and a Sn-rich phase distributed along grain boundaries. The relative density of Cu6AlNiSnInCe alloy formed by Selective laser melting (SLM)increases with increasing laser power or decreasing laser scanning speed, and the maximum relative density reaches 89.6%。

Key words： imitation-gold powder vacuum gas atomization Cu6AlNiSnInCe spherical powder 3D printing

Received: 12 June 2018 Published: 12 July 2019

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	Articles by authors
	CUI Bo
	ZHU Quanli
	CHEN Jin
	MAO Weidong
	Li Bo
	XIAO Zhiyu

Cite this article:

CUI Bo,ZHU Quanli,CHEN Jin, et al. Preparation and characterization of Cu6AlNiSnInCe imitation-gold powder by vacuum nitrogen gas atomization for 3D printing[J]. Materials Science and Engineering of Powder Metallurgy, 2019, 24(1): 1-7.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2019/V24/I1/1

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