期刊
MATERIALS RESEARCH EXPRESS
卷 6, 期 5, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2053-1591/ab0803
关键词
alloying; Strontium; corrosion properties; cytotoxicity; biomaterials; magnesium alloys
资金
- ShanDong province project of outstanding subject talent group
- National Science Foundation of Shandong Province of China [ZR2017MEM005, 2017GK2120]
- Key Research and Development Program of Hunan Province
- National Science Foundation of Hunan Province of China [2018JJ2506]
Mg-1Zn-1Mn (wt%) alloy and Mg-1Zn-1Mn-xSr (wt%, x = 0.1, 0.25, 0.5, 1) alloy as candidates for degradable biomaterials were prepared by casting and extrusion methods. The effect of Sr addition on microstructure, mechanical properties, corrosion resistance and cytotoxicity of Mg-Zn-Mn alloy was investigated. The results showed that Mg-1Zn-1Mn alloy mainly consisted of a-Mg matrix phase while Mg11Zn4Sr3 phase was formed in Mg-1Zn-1Mn-0.25Sr, Mg-1Zn-1Mn-0.5Sr and Mg-1Zn-1Mn-1Sr alloy. After adding Sr, the highest tensile strength of Mg-1Zn-1Mn-1Sr alloy was 280 MPa, but its elongation dropped to 7%. Mg-1Zn-1Mn-0.25Sr alloy exhibited better corrosion resistance in immersion tests, with hydrogen evolution rate of 0.42 mm/year, weight loss rate of 0.72 mm/year, and pH value of 9.0. The cytotoxicity tests indicated that both Mg-1Zn-1Mn and Mg-1Zn-1Mn-0.25Sr alloys were non-toxic against L-929 cells and the highest relative growth rate of Mg-Zn-Mn-0.25Sr extracts group was 102%.
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