Cr含量对微波烧结ZK30-0.2Cu-Cr合金组织与性能的影响

doi:10.19976/j.cnki.43-1448/TF.2021073

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Abstract Using ZK30 powders, copper powders and Cr powders as raw materials, ZK30-0.2Cu-Cr alloy with Cr content of 0-0.40% (mass fraction, the same below) was prepared by microwave sintering. The microstructure of the alloy was observed and analyzed by metallographic microscope, scanning electron microscope and X-ray diffracto meter. The mechanical properties, degradability, antibacterial properties and biocompatibility of the alloy were determined as well. The effect of Cr content on the microstructure and properties of ZK30-0.2Cu-xCr alloy was studied. The results show that the hardness of the alloy increases with the increase of the solid solubility of Cr in the matrix. With the increase of Cr content, the biodegradation rate fluctuates. When w(Cr) is 0.1%, a Cr₂O₃ oxide film forms on the alloy surface to protect the matrix from corrosion, and the biodegradation rate of the alloy reaches the lowest. But when w(Cr) exceeds 0.1%, the solid phase diffusion is not complete, and the residue of Cr element increases galvanic corrosion. Itadversely affects the corrosion resistance of the alloy and increases the biodegradation rate. In addition, all of the ZK30-0.2Cu-xCr alloys have good cytocompatibility and antibacterial ability (antibacterial rate > 93%). Among them, ZK30-0.2Cu-0.05Cr has the best antibacterial performance with antibacterial rate as high as 99.38%. Taken into account, ZK30-0.2Cu-0.1Cr alloy has good mechanical properties, appropriate degradation rate, excellent cytocompatibility and antibacterial properties, so it is a potential antibacterial biological implant material.

Key words： microwave sintering magnesium alloy biodegradation biocompatibility antibacterial properties

Received: 26 August 2021 Published: 28 February 2022

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TG139.6

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	Articles by authors
	XU Yan
	ZHANG Zhizhen
	JI Jie
	JIA Yunyi
	WU Jiani
	PEI Yingluo
	JI Hairui
	ZHAO Mingchun

Cite this article:

XU Yan,ZHANG Zhizhen,JI Jie, et al. Effect of Cr content on microstructure and properties of ZK30-0.2Cu-Cr alloys prepared by microwave sintering[J]. Materials Science and Engineering of Powder Metallurgy, 2022, 27(1): 34-44.

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http://pmbjb.csu.edu.cn/EN/10.19976/j.cnki.43-1448/TF.2021073 OR http://pmbjb.csu.edu.cn/EN/Y2022/V27/I1/34

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