钻石涂层碳化的干摩擦性能
Yuefeng Du1,2, Fangmin Xie2, Jian Wang2
1Key Laboratory of Marine Materials and Related Technologies, Zhejiang Key Laboratory of Marine Materials and Protective Technologies, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Sciences, Ningbo 315201, China.
Materials (Basel, Switzerland)
|May 27, 2023
概括
纳米晶体钻石 (NCD) 涂层显著减少碳化 (SiC) 机械密封的摩擦和磨损. 这种增强可以在极端条件下提高密封性能,延长使用寿命.
科学领域:
- 材料科学 材料科学 材料科学
- 部落学 (tribology) 是一个学科.
- 机械工程 机械工程
背景情况:
- 机械密封件的干摩擦,特别是在极端条件下,损害了操作稳定性和寿命.
- 碳化 (SiC) 是用于密封面的常见材料,但其tribological性能可能是有限的.
研究的目的:
- 为了研究纳米晶体钻石 (NCD) 涂层在SiC密封圈上的有效性,以改善 tribological 属性.
- 为了减少在干燥条件下工作的机械密封件的摩擦和磨损.
主要方法:
- 在SiC密封环上制备NCD涂层,使用热化学蒸汽沉积 (HFCVD).
- 在干燥环境下测试SiC-NCD密封对和SiC-SiC密封对的摩擦和磨损.
- 对磨损痕迹的分析,以了解 tribological 改进的潜在机制.
主要成果:
- 与SiC-NCD密封对相比,SiC-NCD密封对的摩擦系数 (COF) 显著降低,为0.07-0.09,比SiC-SiC对减少83-86%.
- 观察到SiC-NCD密封对的低磨损率 (1.13 × 10−7到3.26 × 10−7毫米/N·m),归因于防止粘合剂和磨料磨损.
- 在SiC-NCD对的磨损表面上形成一个自我滑的无形层,有助于它们的优秀的tribological性能.
结论:
- NCD涂层在提高SiC机械密封的tribological性能方面非常有效.
- 开发的SiC-NCD密封对显示了在苛刻,高参数的工作条件下可靠运行的潜力.
- 本研究提出了一种可行的策略,通过先进的表面工程来提高机械密封的耐用性和稳定性.
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