氩气雾化制备Cu-3Ag-0.5Zr合金粉末的显微组织及性能

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Abstract Cu-3Ag-0.5Zr alloy powder was fabricated by argon gas atomization, and its particle size distribution, oxygen content, apparent density, flowability, morphology, phase and microstructure were investigated. The results show that argon gas atomized Cu-3Ag-0.5Zr alloy powders are almost spherical and normal distribution. 90% of particle size of the powders is less than 200 μm. The median diameter Dv₍₅₀₎ is about 49.9 μm. Oxygen content (mass fraction) of Cu alloy powders with size less than 50 μm, between 50-106 μm and more than 106 μm are 0.067%, 0.039% and 0.013%, the apparent density are 4.39, 4.95 and 5.02 g/cm³, and the flowability are 16.59, 15.96 and 15.62 s/50 g, respectively. The microstructure of the powders is fine and homogeneous, and the average grain size is 3.82 μm. The microstructure of large particle size powders is dendritic crystal structure and the microstructure of small particle size powders is equiaxed crystal structure. There is no obvious Ag or Zr second-phase precipitation in powder matrix, and the structure of powder is a homogeneous supersaturated solid solution.

Key words： argon gas atomization Cu-3Ag-0.5Zr alloy powders powder size morphology microstructure

Received: 29 June 2018 Published: 12 July 2019

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TG146.1

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	WEN Jingyu
	LIU Zuming
	MA Mengmei
	LÜ Xueqian

Cite this article:

WEN Jingyu,LIU Zuming,MA Mengmei, et al. Microstructure and properties of Cu-3Ag-0.5Zr alloy powder prepared by argon gas atomization[J]. Materials Science and Engineering of Powder Metallurgy, 2019, 24(4): 329-333.

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http://pmbjb.csu.edu.cn/EN/ OR http://pmbjb.csu.edu.cn/EN/Y2019/V24/I4/329

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