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放电等离子烧结制备生物Mg-Zn合金的组织及性能
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作者单位:

太原理工大学材料科学与工程学院,太原理工大学材料科学与工程学院,太原理工大学材料科学与工程学院,太原理工大学材料科学与工程学院,新材料界面科学与工程教育部重点实验室;新材料界面科学与工程教育部重点实验室

中图分类号:

TG146

基金项目:

国家自然科学基金资助(项目号51305292)


Microstructures and mechanical properties of biodegradable magnesium-zinc alloy fabricated by spark plasma sintering
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Affiliation:

School of Materials Science and Engineering,Taiyuan university of technology,School of Materials Science and Engineering,Taiyuan university of technology,School of Materials Science and Engineering,Taiyuan university of technology,School of Materials Science and Engineering,Taiyuan university of technology,Key Laboratory of Interface Sscience and Engineering in Advanced Materials,Ministry of Education,Shanxi Taiyuan;Key Laboratory of Interface Sscience and Engineering in Advanced Materials,Ministry of Education,Shanxi Taiyuan

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    摘要:

    以Mg粉和Zn粉为原料,采用高能球磨混粉和放电等离子烧结(SPS)的方法制备了含Zn量为0wt%, 2wt, 4wt%, 6wt%, 8wt%的生物Mg-Zn 合金,对其显微组织、力学性能和腐蚀性能进行了研究。结果表明：制备的Mg-Zn合金内部结构致密,组织分布均匀；显微硬度和抗压强度随Zn含量增加而增加,含量为6wt%时达到最大值(69.0 Hv0.1和379.5 MPa)；模拟体液中的电化学腐蚀电位随Zn含量的增加而升高,腐蚀电流密度则降低,在6wt%时分别达到最高值和最小值。浸泡试验中,含Zn量为6wt%合金表现出最好的耐腐蚀性能,随含Zn量的增加,腐蚀形式由严重的点蚀和颗粒剥落转变为轻微的点蚀和颗粒内均匀的晶内腐蚀。

    Abstract:

    Biological Mg-x(2~8) wt%Zn alloys were fabricated from pure magnesium and zinc powders using high-energy ball milling and spark plasma sintering method. The microstructure, mechanical properties and corrosion performance of the biological Mg-Zn alloys were investigated. The results reveal that the sintered samples have a compact and homogenous internal structure. The mechanical properties, i.e. hardness and compression strength increased with increasing Zn content, and reached the maximum (69.0 Hv0.1 and 379.5 MPa) at the 6wt% of Zn. The corrosion potential increased with increasing Zn content, while representing opposite tendency in current density tested in the SBF, and achieved the maximum and minimum respectively at the 6wt% of Zn. Moreover the corrosion mode in SBF transformed from severly crevice corrosion and pitting corrosion into particle spalling, finally presening a internal corrosion of particles and light pitting corrosion with the Zn content increased.

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程林信,崔泽琴,郭浦山,王文先,许并社.放电等离子烧结制备生物Mg-Zn合金的组织及性能[J].稀有金属材料与工程,2017,46(11):3518~3524.[Cheng Linxin, Cui Zeqin, Guo Pushan, Wang Wenxian, Xu Binshe. Microstructures and mechanical properties of biodegradable magnesium-zinc alloy fabricated by spark plasma sintering[J]. Rare Metal Materials and Engineering,2017,46(11):3518~3524.]
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  • 收稿日期:2015-09-11
  • 最后修改日期:2015-11-02
  • 录用日期:2015-12-11
  • 在线发布日期: 2017-12-13

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