Investigating the Bio-tribological Aspects of Novel Squeeze Rheo Casted Magnesium Alloy Composites for Orthopedic Implant Applications

IF 2.1 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY

JOM Pub Date : 2024-10-10 DOI:10.1007/s11837-024-06897-5

Vignesh Packkirisamy, Arunkumar Thirugnanasambandam, Rajendra Prasad Reddy Botta, Manoj Gupta

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引用次数: 0

Abstract

The present research work assessed the influence of zinc and tin alloying elements on the wear behavior of hydroxyapatite-reinforced magnesium-based composites such as Mg/HA, Mg-Zn/HA and Mg-Sn/HA. These composites were made through the new ultrasonic-assisted squeezing rheo casting method. The SEM analysis reveals the even distribution of HA and formation of MgZn as well as Mg₂Sn secondary phases. The microhardness and compression test results showed that the mechanical properties of Mg-Sn/HA composites were better. Wear tests were performed under a simulated body fluid environment with a constant load of 45 N, sliding velocity of 2 m/s and sliding distance of 1000 m. Wear test results revealed that the Mg-Sn/HA sample had a lower wear rate and COF than the other samples. The predominant form of wear was abrasion but there was also evidence of fatigue cracks, oxidation, adhesion and delamination. The improvement in mechanical properties and wear resistance shown by Mg-Sn/HA composites has been attributed to grain size reduction as well as proper dispersion of secondary phases and formation of protective tribolayers between the sliding surfaces. Thus, the 1% Sn alloyed Mg/HA composite can be adopted as a wear-resistant implant in biomedical applications.

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研究骨科植入物应用中新型挤压流变铸造镁合金复合材料的生物特征

本研究评估了锌和锡合金元素对羟基磷灰石增强镁基复合材料（如 Mg/HA、Mg-Zn/HA 和 Mg-Sn/HA）磨损行为的影响。这些复合材料是通过新型超声波辅助挤压流变铸造法制成的。扫描电镜分析表明，HA 分布均匀，并形成了 MgZn 和 Mg2Sn 两种次生相。显微硬度和压缩试验结果表明，Mg-Sn/HA 复合材料具有更好的机械性能。在模拟体液环境下进行了磨损测试，恒定载荷为 45 N，滑动速度为 2 m/s，滑动距离为 1000 m。磨损测试结果表明，Mg-Sn/HA 样品的磨损率和 COF 均低于其他样品。磨损的主要形式是磨损，但也有疲劳裂纹、氧化、粘附和分层的迹象。Mg-Sn/HA 复合材料机械性能和耐磨性的改善归功于晶粒尺寸的减小、次生相的适当分散以及滑动表面之间保护摩擦层的形成。因此，1% 锡合金化 Mg/HA 复合材料可用作生物医学应用中的耐磨植入物。

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来源期刊

JOM 工程技术-材料科学：综合

CiteScore

4.50

自引率

3.80%

发文量

540

审稿时长

2.8 months

期刊介绍： JOM is a technical journal devoted to exploring the many aspects of materials science and engineering. JOM reports scholarly work that explores the state-of-the-art processing, fabrication, design, and application of metals, ceramics, plastics, composites, and other materials. In pursuing this goal, JOM strives to balance the interests of the laboratory and the marketplace by reporting academic, industrial, and government-sponsored work from around the world.