Significant refinement of coarse (Fe, Mn)Zn13 phase in biodegradable Zn-1Mn-0.1Fe alloy with minor addition of rare earth elements

被引：21

作者：

Shi, Zhang-Zhi ^{[1
,2
,3
]}

Bai, Wen-Shan ^{[2
]}

Liu, Xue-Feng ^{[2
,3
]}

Zhang, Hai-Jun ^{[4
,5
]}

Yin, Yu-Xia ^{[1
,5
]}

Wang, Lu-Ning ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, Sch Mat Sci & Engn, Beijing Adv Innovat Ctr Mat Genome Engn, Beijing 100083, Peoples R China

[2] Univ Sci & Technol Beijing, Beijing Lab Metall Mat & Proc Modern Transportat, Beijing 100083, Peoples R China

[3] Univ Sci & Technol Beijing, Minist Educ, Key Lab Adv Mat Proc, Beijing 100083, Peoples R China

[4] Tartgji Univ, Peoples Hosp Shanghai 10, Dept Intervent & Vasc Surg, Shanghai 200072, Peoples R China

[5] Natl United Engn Lab Biomed Mat Modificat, Branden Ind Pk, Dezhou City 251100, Shandong, Peoples R China

来源：

MATERIALS CHARACTERIZATION | 2019年 / 158卷

基金：

国家重点研发计划;

关键词：

Biodegradable Zn alloys; Microstructure refinement; Mechanical properties; Cell viability; Rare-earth addition; MECHANICAL-PROPERTIES; DEGRADATION BEHAVIOR; CRYSTALLOGRAPHY; MICROSTRUCTURE; CU; SOLIDIFICATION; COMPOUND;

D O I：

10.1016/j.matchar.2019.109993

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Zn alloys containing Fe element suffer from the detrimental effect of coarse FeZn(13 )or (Fe, Mn)Zn-13 second phase in Zn matrix on mechanical properties, especially on ductility. The key reasons are the peritectic reaction of Fe and Zn at high temperatures and negligible solid solubility of Fe in Zn at low temperatures. Taking a recently developed biodegradable Zn-Mn-Fe alloy as the base alloy, it is revealed that minor additions of Y and Nd rare-earth elements can significantly refine (Fe, Mn)Zn-13 phase. With a total addition of 0.14%, the average size of blocky (Fe, Mn)Zn-13 particles reduces about 43%, while the average length of lath-like (Fe, Mn)Zn-13 particles reduces about 50%. Sphere-like (Y, Nd)Zn-12 particles serve as effective nucleating agents for (Fe, Mn)Zn-13 and MitZn(13) with nearly the same lattice parameters. As a result, yield strength, the ultimate tensile strength, and elongation to failure of the base alloy increase by 30 MPa, 27 MPa, and 6%, respectively. Cell viabilities of the alloys with or without rare-earth additions are all over 100%, indicating good biocompatibility.

引用

页数：9

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