激光重熔对生物可降解<strong>Zn-0.4Mn</strong>合金微观结构和性能的影响

doi:10.11902/1005.4537.2024.223

中国腐蚀与防护学报

2025, Vol. 45

Issue (4): 1127-1134 CSTR: 32134.14.1005.4537.2024.223 DOI: 10.11902/1005.4537.2024.223

研究报告

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激光重熔对生物可降解Zn-0.4Mn合金微观结构和性能的影响

岳锐¹^,², 刘咏咏¹, 杨丽景²(

), 朱兴隆², 陈权昕², 阿那尔², 张青科², 宋振纶²

1 宁波大学材料科学与化学工程学院宁波 315211
2 中国科学院宁波材料技术与工程研究所海洋关键材料全国重点实验室宁波 315201

Effect of Laser Surface Remelting on Microstructure and Properties of Biodegradable Zn-0.4Mn Alloy

YUE Rui¹^,², LIU Yongyong¹, YANG Lijing²(

), ZHU Xinglong², CHEN Quanxin², A Naer², ZHANG Qingke², SONG Zhenlun²

1 School of Materials Science and Chemical Engineering, Ningbo University, Ningbo 315211, China
2 State Key Laboratory of Advanced Marine Materials, Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, Ningbo 315201, China

引用本文:

岳锐, 刘咏咏, 杨丽景, 朱兴隆, 陈权昕, 阿那尔, 张青科, 宋振纶. 激光重熔对生物可降解Zn-0.4Mn合金微观结构和性能的影响[J]. 中国腐蚀与防护学报, 2025, 45(4): 1127-1134.
Rui YUE, Yongyong LIU, Lijing YANG, Xinglong ZHU, Quanxin CHEN, Naer A, Qingke ZHANG, Zhenlun SONG. Effect of Laser Surface Remelting on Microstructure and Properties of Biodegradable Zn-0.4Mn Alloy[J]. Journal of Chinese Society for Corrosion and protection, 2025, 45(4): 1127-1134.

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摘要:

锌合金因其较低的腐蚀速率和良好的生物相容性，被认为是潜在的医用可降解金属材料。针对Zn-0.4Mn合金延伸率较好但表面硬度和耐磨性较低以及细胞相容性较差的问题，本研究在合金表面利用激光重熔技术在合金表面进行改性，并对激光重熔后合金的微观结构、显微硬度、耐磨性、耐腐蚀性和细胞相容性进行分析探讨。结果表明，重熔后的Zn-0.4Mn合金表面硬度和耐磨性显著提高；腐蚀电流密度降低以及阻抗的增大，表明了激光重熔提高了Zn-0.4Mn合金的耐腐蚀性；L929细胞毒性实验结果说明锌合金的生物相容性有所提升，这是由于重熔后合金耐蚀性增加，减少了锌离子的溶出。因此，激光重熔是提升锌合金力学性能、降解性能和生物安全性的一种有效手段。

关键词 ：锌合金, 激光重熔, 显微硬度, 耐磨性, 耐腐蚀性

Abstract：

Zn-alloys are regarded as promising biodegradable metallic materials due to their low corrosion rates and favorable cytocompatibility. To address the challenges associated with the Zn-0.4Mn alloy, which exhibits better ductility but lower surface hardness, wear resistance, and cytocompatibility etc., herein, the effect of surface laser remelting on the microstructure, microhardness, wear resistance, corrosion resistance, and cytocompatibility of the Zn-0.4Mn alloy was assessed. The findings revealed that the surface hardness and wear resistance of the remelted Zn-0.4Mn alloy were significantly enhanced. Furthermore, a reduction in corrosion current density and an increase in impedance indicated that laser remelting improved the corrosion resistance of the Zn-0.4Mn alloy. Additionally, L929 cytotoxicity tests demonstrated that the biocompatibility of the Zn-alloy was enhanced due to improved corrosion resistance and reduced leaching of Zn ions. Consequently, laser remelting emerges as an effective method for improving the mechanical properties, degradation characteristics, and biosafety of Zn-alloys.

Key words： Zn-alloy laser surface remelting microhardness abrasion resistance corrosion resistance

收稿日期: 2024-07-26 32134.14.1005.4537.2024.223

ZTFLH:

TG174.4

基金资助:“尖兵领雁+X”研发攻关计划项目(2024C03078);宁波市国际科技合作项目(2023H022);宁波市青年科技创新领军人才项目(2023QL014)

通讯作者: 杨丽景，E-mail：yanglj@nimte.ac.cn，研究方向为金属材料腐蚀与防护

Corresponding author: YANG Lijing, E-mail: yanglj@nimte.ac.cn

作者简介: 岳锐，男，1999年生，硕士生

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https://www.jcscp.org/CN/10.11902/1005.4537.2024.223 或 https://www.jcscp.org/CN/Y2025/V45/I4/1127

图1 纳米压痕测试示意图

Composition	Concentration
Na⁺	142 mmol/L
K⁺	5.0 mmol/L
Ca²⁺	2.5 mmol/L
Mg²⁺	1.5 mmol/L
HCO $3 -$	4.2 mmol/L
Cl^-	147 mmol/L
HPO $4 2 -$	1 mmol/L
SO $4 2 -$	0.5 mmol/L
Tris	6.069 g/L

表1 SBF溶液的离子浓度[23]

图2 LSR处理的Zn-0.4Mn合金的表面和横截面形貌

图3 Zn-0.4Mn合金和LSR处理的Zn-0.4Mn合金的XRD谱

图4 LSR处理的Zn-0.4Mn合金在载荷为5 μN和持续时间为10 s的条件下的载荷-深度曲线和硬度分布曲线

图5 在2 N的载荷和2 Hz的频率下对样品进行1800 s的摩擦和磨损测试的摩擦系数变化曲线和磨损深度曲线

表2 摩擦系数和磨损深度

图6 在SBF中浸泡不同天数的试样的腐蚀形貌

图7 试样在SBF溶液中浸泡30 min后的极化曲线和EIS

表3 在SBF溶液的PDP测试结果

表4 在SBF溶液中的EIS拟合结果

图8 L-929细胞在25%浓度提取物的不同试样中培养24和72 h后的生长形态

表5 ICP-OES对浸提液中元素的测定结果

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