Grain Growth upon Annealing and Its Influence on Biodegradation Rate for Pure Iron

被引：2

作者：

Zhang, Yu ^{[1
,2
]}

Zhang, Ke ^{[1
,2
]}

Liu, Weidong ^{[1
,3
]}

Zheng, Zhongren ^{[4
]}

Zhao, Mingchun ^{[4
]}

机构：

[1] Cent South Univ, Xiangya Hosp, Changsha 410008, Peoples R China

[2] Xiangya Hosp, Natl Clin Res Ctr Geriatr Disorders, Changsha 410008, Peoples R China

[3] Int Joint Res Ctr Minimally Invas Endoscop Techno, Changsha 410008, Peoples R China

[4] Cent South Univ, Sch Mat Sci & Engn, Changsha 410083, Peoples R China

来源：

MATERIALS | 2022年 / 15卷 / 22期

关键词：

pure iron; annealing; grain refinement; biodegradation; implant material; BIOCOMPATIBILITY; DEGRADATION; CYTOTOXICITY; CORROSION; ALLOYS; METAL;

D O I：

10.3390/ma15228030

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Biodegradable pure iron has gained significant interest as a biomedical material. For biodegradable implant applications, the biodegradation behavior of pure iron is important. In this work, the influence of ferrite grain size on the biodegradation rate for pure iron was studied by means of heat treatment that was annealed below the austenized temperature using as-forged pure iron. Grains were coarsened and a spectrum of ferrite grain sizes was gained by changing the annealed temperature. Biodegradation behavior was studied through weight loss tests, electrochemical measurements and microscopic analyses. Hardness (HV) and biodegradation rate (P-i or P-w) were linearly ferrite grain size-dependent: HV = 58.9 + 383.2d(-1/2) and P-i = -0.023 + 0.425d(-1/2) or P-w = 0.056 + 0.631d(-1/2). The mechanism by which the role of grain size on biodegradation rate was attributed to the ferrite grain boundary traits.

引用

页数：11

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