微量Y2O3对多孔Mg-Al合金组织和性能的影响

雷德山, 肖晓华, 方梓伊, 邓睿, 刘千礼, 黄本生

doi:10.16577/j.issn.1001-1560.2023.0087

材料保护 >

2023 , Vol. 56 >Issue 4: 81 - 87

DOI: https://doi.org/10.16577/j.issn.1001-1560.2023.0087

试验研究

微量Y₂O₃对多孔Mg-Al合金组织和性能的影响

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¹西南石油大学新能源与材料学院； ²西南石油大学网络与信息化中心

黄本生(1969-)，教授，博士后，研究方向为表面工程、新材料开发，E-mail:hbslxp＠163.com

收稿日期: 2022-10-21

修回日期: 2022-11-14

录用日期: 2022-12-08

网络出版日期: 2023-08-03

基金资助

国家级大学生创新创业训练计划(S202110615015)；西南石油大学大学生课外开放实验项目(2020KSZ61003)资助

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Effect of Trace Yttrium Oxide on the Microstructure and Properties of Porous Mg-Al Alloy

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(a.School of New Energy and Materials，b.Network and Information center，Southwest Petroleum University，Chengdu 610500，China)

Received date: 2022-10-21

Revised date: 2022-11-14

Accepted date: 2022-12-08

Online published: 2023-08-03

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摘要

镁基多孔材料在生物医用领域具有广阔的应用前景，为提高多孔Mg-Al 合金在人体体液中的耐腐蚀性，采用粉末冶金法制备多孔Mg-Al 合金，添加不同含量(0，0.2%，0.4%，0.6%)的Y2O3对Mg-Al 合金进行改性。采用金相显微镜、XRD、SEM、万能试验机和电化学工作站探究了Y2O3含量对多孔Mg-Al 合金的孔隙率和孔隙形貌、显微组织、抗压强度及其在Hank’s 仿生溶液中耐蚀性的影响。结果表明:采用粉末冶金法制备的多孔Mg-Al合金的孔隙率为39%左右，粉末冶金法可较为准确地控制多孔Mg-Al 合金的孔隙形貌和大小。多孔Mg-Al 合金主要由Mg 和第二相Al12Mg17组成，Y2O3的添加可使多孔Mg-Al 合金晶粒得到细化、晶粒尺寸均匀化，第二相分布更加均匀，并提高多孔Mg-Al 合金的抗压强度及其在Hank’s 仿生溶液中的耐蚀性。当Y2O3含量为0.4%时，多孔Mg-Al 合金的抗压强度为46.4 MPa，在Hank’s 仿生溶液中的腐蚀速率为0.887 44 mm/a。

关键词： 多孔Mg-Al 合金; Y2O3; 抗压强度; 耐蚀性; Hank’s 仿生溶液

本文引用格式

雷德山, 肖晓华, 方梓伊, 邓睿, 刘千礼, 黄本生 . 微量Y₂O₃对多孔Mg-Al合金组织和性能的影响[J]. 材料保护, 2023 , 56(4) : 81 -87 . DOI: 10.16577/j.issn.1001-1560.2023.0087

Abstract

Mg-based porous materials have broad application prospect in biomedical field.In order to improve the corrosion resistance of porous Mg-Al alloy in human body fluid，porous Mg-Al alloy was prepared by powder metallurgy，and Y2O3 with different contents (0，0.2%，0.4%，0.6%) was added to modify the Mg-Al alloy.The effects of Y2 O3 content on the porosity，pore morphology，microstructure，compressive strength and corrosion resistance of porous Mg-Al alloy in Hank's biomimetic solution were investigated by means of metallographic microscope，XRD，SEM，universal testing machine and electrochemical workstation.Results showed that the porosity of porous Mg-Al alloy prepared by powder metallurgy was about 39%，and the powder metallurgy method could accurately control the pore morphology and size of porous Mg-Al alloy.Moreover，porous Mg-Al alloy was mainly composed of Mg and the second phase Al12Mg17.The addition of Y2O3 could refine the grains of porous Mg-Al alloy，homogenize the grain size，distribute the second phase more evenly，and improve the compressive strength of porous Mg-Al alloy and its corrosion resistance in Hank's bionic solution.When the content of Y2O3 was 0.4%，the compressive strength of porous Mg-Al alloy was 46.4 MPa，and the corrosion rate in Hank's biomimetic solution was 0.887 44 mm/a.

Key words： porous Mg-Al alloy; Y2O3; compressive strength; corrosion resistance; Hank’s bionic solution

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