激光粉末床融合WS2/316L不钢纳米复合材料,以提高机械和tribological性能
Sangharatna M Ramteke1, Suryank Dwivedi1, Jorge Ramos-Grez1
1Department of Mechanical and Metallurgical Engineering, School of Engineering, Pontificia Universidad Católica de Chile, Santiago 7820436, Chile.
Langmuir : the ACS journal of surfaces and colloids
|January 30, 2026
概括
二硫化物 (WS2) 纳米粒子增强了通过激光粉床融合 (LPBF) 制造的316L不钢金属矩阵复合材料 (MMC). 5%的WS2复合材料表现出更好的硬度和显著降低的磨损率,非常适合耐用植入物.
科学领域:
- 材料科学 材料科学 材料科学
- 机械工程 机械工程
- 表面工程是什么?表面工程是什么?
背景情况:
- 植入物材料和工业部件需要增强耐用性,防止磨损和表面退化.
- 316L不钢是一种常见的材料,但在苛刻的应用中面临限制.
- 需要先进的复合材料来克服这些局限性.
研究的目的:
- 开发和表征316L不钢金属矩阵复合材料 (MMC) 增强二硫化物 (WS2) 纳米粒子.
- 为了研究WS2加法对微观结构,机械性能和tribological行为的影响.
- 评估这些纳米复合材料在高性能应用中的潜力.
主要方法:
- 使用激光粉床聚变 (LPBF) 制造316L/WS2纳米复合材料,使用不同的WS2度 (1,3,5 wt%).
- 微观结构分析观察谷物形态和精细化.
- 机械测试包括微硬度测量.
- 在不同温度 (25°C和37°C) 的干振荡条件下进行tribological测试.
- 拉曼光谱分析磨损机制和 tribofilm 组成.
主要成果:
- WS2的整合导致了显著的微观结构改进和更平衡的粒度结构.
- 5%重量的WS2复合材料表现出最高的微硬度 (254 HV) 和降低的硬度异构性.
- 在25°C和37°C的体积磨损率下降了21%,对于5重%的WS2复合材料,与纯316L相比,观察到的体积磨损率下降了44%.
- WS2纳米粒子形成了保护性 tribofilms,减少金属对金属的接触和磨损.
- 拉曼光谱证实了在不同温度下富含WS2和氧化物主导的 tribofilm 形成.
结论:
- 激光粉床融合制造的WS2/316L纳米复合材料提供了增强的机械性能和优越的耐磨性.
- 添加WS2纳米粒子通过微结构改进和triofilm形成协同改善材料性能.
- 这些纳米复合材料显示出耐用生物医学植入物和在恶劣条件下运行的工业部件的巨大潜力.
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