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热处理Mg-Y-Ag生物可降解合金的显微硬度及体外腐蚀性能

Microhardness and In Vitro Corrosion of Heat-Treated Mg-Y-Ag Biodegradable Alloy.

作者信息

Vlček Marián, Lukáč František, Kudrnová Hana, Smola Bohumil, Stulíková Ivana, Luczak Monika, Szakács Gábor, Hort Norbert, Willumeit-Römer Regine

机构信息

Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 12116 Prague 2, Czech Republic.

Institute of Materials Research, Helmholtz-Zentrum Geesthacht, Max-Planck-Straße 1, 21502 Geesthacht, Germany.

出版信息

Materials (Basel). 2017 Jan 11;10(1):55. doi: 10.3390/ma10010055.

DOI:10.3390/ma10010055
PMID:28772414
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5344547/
Abstract

Magnesium alloys are promising candidates for biodegradable medical implants which reduce the necessity of second surgery to remove the implants. Yttrium in solid solution is an attractive alloying element because it improves mechanical properties and exhibits suitable corrosion properties. Silver was shown to have an antibacterial effect and can also enhance the mechanical properties of magnesium alloys. Measurements of microhardness and electrical resistivity were used to study the response of Mg-4Y and Mg-4Y-1Ag alloys to isochronal or isothermal heat treatments. Hardening response and electrical resistivity annealing curves in these alloys were compared in order to investigate the effect of silver addition. Procedures for solid solution annealing and artificial aging of the Mg-4Y-1Ag alloy were developed. The corrosion rate of the as-cast and heat-treated Mg-4Y-1Ag alloy was measured by the mass loss method. It was found out that solid solution heat treatment, as well artificial aging to peak hardness, lead to substantial improvement in the corrosion properties of the Mg-4Y-1Ag alloy.

摘要

镁合金是用于可生物降解医疗植入物的有前途的候选材料，这减少了进行二次手术取出植入物的必要性。固溶态的钇是一种有吸引力的合金元素，因为它能改善机械性能并具有合适的腐蚀性能。银已被证明具有抗菌作用，还能增强镁合金的机械性能。通过测量显微硬度和电阻率来研究Mg-4Y和Mg-4Y-1Ag合金对等时或等温热处理的响应。比较了这些合金中的硬化响应和电阻率退火曲线，以研究添加银的影响。制定了Mg-4Y-1Ag合金的固溶退火和人工时效工艺。采用质量损失法测量了铸态和热处理态Mg-4Y-1Ag合金的腐蚀速率。结果发现，固溶热处理以及人工时效至峰值硬度，会使Mg-4Y-1Ag合金的腐蚀性能得到显著改善。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83b1/5344547/f0b3bb51e485/materials-10-00055-g009.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83b1/5344547/0a4dc531e5af/materials-10-00055-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83b1/5344547/201dcb37292e/materials-10-00055-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83b1/5344547/3e2cb53a9607/materials-10-00055-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83b1/5344547/e45c04b7203c/materials-10-00055-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83b1/5344547/f0b3bb51e485/materials-10-00055-g009.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83b1/5344547/9ec39077b605/materials-10-00055-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83b1/5344547/b0830c6c1f55/materials-10-00055-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83b1/5344547/8f9572894278/materials-10-00055-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83b1/5344547/22540b417cb1/materials-10-00055-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83b1/5344547/0a4dc531e5af/materials-10-00055-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83b1/5344547/201dcb37292e/materials-10-00055-g006.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83b1/5344547/3e2cb53a9607/materials-10-00055-g007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83b1/5344547/e45c04b7203c/materials-10-00055-g008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83b1/5344547/f0b3bb51e485/materials-10-00055-g009.jpg

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