首页|吻合钉用可降解四元Mg?1Zn?0.2Ca?xAg合金丝材的显微组织、力学性能和腐蚀行为

吻合钉用可降解四元Mg?1Zn?0.2Ca?xAg合金丝材的显微组织、力学性能和腐蚀行为

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
  • 维普
研究吻合钉用Mg−1Zn−0.2Ca−xAg(x=1,2,4,％,质量分数)可降解镁合金丝材的显微组织、力学性能和腐蚀行为.通过SEM、EDS、XRD和TEM分析,发现合金主要由Mg基体和Ag17Mg54相组成.拉伸和打结试验结果表明,该合金丝材具有优良的力学性能.特别是Mg−1Zn−0.2Ca−4Ag合金的力学性能最好,其极限抗拉强度为334 MPa,伸长率为8.6％.此外,根据质量损失实验和SKPFM结果,随着Ag含量的增加,Mg基体与Ag17Mg54相之间形成微电偶,镁合金丝材的腐蚀速率显著增加.该镁合金能在28 d内在体内完全降解,各项性能均能满足吻合钉的要求.
Microstructure, mechanical properties and corrosion behavior of quaternary Mg−1Zn−0.2Ca−xAg alloy wires applied as degradable anastomotic nails
The microstructure, mechanical properties and corrosion behavior of quaternary degradable Mg−1Zn− 0.2Ca−xAg (x=1, 2, 4 wt.％) alloy wires, intended as anastomotic nails, were investigated. It was found that these Ag-containing alloy wires mainly consist of Mg matrix and Ag17Mg54 phase, characterized by SEM, EDS, XRD and TEM. Tensile and knotting tests results demonstrate the superior mechanical properties of these alloy wires. Especially, Mg−1Zn−0.2Ca−4Ag alloy exhibits the highest mechanical properties, i.e. an ultimate tensile strength of 334 MPa and an elongation of 8.6％. Moreover, with increasing Ag content, the corrosion rates of these alloy wires remarkably increase due to the formation of more micro-galvanic coupling between Mg matrix and Ag17Mg54 phase, shown by mass loss and scanning Kelvin probe force microscopy (SKPFM) results. The present alloy can be completely degraded within 28 d, satisfying the property requirements of anastomotic nails.

Mg−Zn−Ca−Ag alloydegradabilityanastomotic nailsmicrostructuremechanical propertiescorrosion behavior

马英中、王德鑫、李宏祥、杨长林、原福松、张济山

展开 >

北京科技大学新金属材料国家重点实验室,北京 100083

西北工业大学凝固技术国家重点实验室,西安 710072

北京大学口腔医院口腔数字化中心,北京 100081

Mg−Zn−Ca−Ag合金 可降解性 吻合钉 显微组织 力学性能 腐蚀行为

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaBeijing Municipal Natural Science Foundation, ChinaBeijing Laboratory of Metallic Materials and Processing for Modern Transportation, ChinaFundamental Research Funds for the Central Universities, ChinaMajor State Research and Development Program of ChinaFund of State Key Laboratory for Advanced Metals and Materials, China

51671017519710202202033FRF-IC-19-0152016YFB03008012018-Z04

2021

10.1016/S1003-6326(20)65481-4

中国有色金属学报(英文版)
中国有色金属学会

中国有色金属学报(英文版)

CSTPCDCSCDSCI
影响因子：1.183
ISSN：1003-6326
年,卷(期)：2021.31(1)
  • 8
  • 10