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含有GO对Ti6Al4V涂层增强人工关节微观结构和机械性能的影响
Yuling Gong1, Chen Cui2, Meiping Wu2
1School of Mechatronic Engineering, Taizhou University, Taizhou, Jiangsu, China.
概括
石墨烯氧化物 (GO) 的添加增强了合金 (Ti6Al4V) 人造关节的表面性能. 最佳0.5%的GO含量显著提高了微硬度,降低了磨损率,提高了机械性能.
科学领域:
- 材料科学 材料科学 材料科学
- 生物材料工程 生物材料工程
- 表面工程是什么?表面工程是什么?
背景情况:
- 人工关节材料需要增强的表面机械性能,以提高寿命和性能.
- 像Ti6Al4V这样的合金广泛用于关节置换,但可以从表面修改中获益.
- 石墨烯氧化物 (GO) 被探索为增强剂,以改善金属材料的性能.
研究的目的:
- 研究现场合成的碳化 (TiC) 硬相对Ti6Al4V表面机械性能的影响.
- 为了确定石墨烯氧化物 (GO) 的最佳添加,以创建GO/Ti6Al4V复合涂层.
- 评估开发的复合涂料的微观结构,相位组成和机械行为.
主要方法:
- 制备GO/Ti6Al4V复合粉末,其GO度不同 (0-1.5重量%).
- 激光覆盖技术将GO/Ti6Al4V复合涂层沉积在Ti6Al4V基板上.
- 使用SEM,OM,EDS,tribometer,硬度测试仪和表面造型仪进行表征.
主要成果:
- 在in-situ合成的纳米级TiC相分布在状马石中,显著提高了涂层性能.
- 与纯Ti6Al4V相比,最佳的GO添加 (0.5重量%) 导致微硬度增加了1.325倍.
- 0.5%重量的GO/Ti6Al4V涂层在模拟的体液中表现出低摩擦系数 (0.307) 和降低磨损率 (3.5 × 10−7 mm3/N·m).
结论:
- 通过GO添加在现场形成TiC是一种有效的策略,可以改善Ti6Al4V在人工关节的表面机械性能.
- 添加GO精炼了谷物结构并提高了耐磨性,但过量会对流动性产生负面影响并引入缺陷.
- 优化的GO/Ti6Al4V复合涂层表现出优越的硬度和tribological性能,使其成为人工关节应用的有希望的候选人.
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