...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>ACS applied materials & interfaces >State-of-the-Art of Extreme Pressure Lubrication Realized with the High Thermal Diffusivity of Liquid Metal
【24h】

State-of-the-Art of Extreme Pressure Lubrication Realized with the High Thermal Diffusivity of Liquid Metal

机译：最终压力润滑，实现了液态金属的高热扩散性

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Sliding between two objects under very high load generally involves direct solid solid contact at molecular/atomic level, the mechanism of which is far from clearly disclosed yet. Those microscopic solid solid contacts could easily lead to local melting of rough surfaces. At extreme conditions, this local melting could propagate to the seizure and welding of the entire interface. Traditionally, the microscopic solid solid contact is alleviated by various lubricants and additives based on their improved mechanical properties. In this work, we realized the state-of-the-art of extreme pressure lubrication by utilizing the high thermal diffusivity of liquid metal, 2 orders of magnitude higher than general organic lubricants. The extreme pressure lubrication property of gallium based liquid metal (GBLM) was compared with gear oil and poly-alpha-olefin in a four-ball test. The liquid metal lubricates very well at an extremely high load (10 kN, the maximum capability of a four-ball tester) at a rotation speed of 1800 rpm for a duration of several minutes, much better than traditional organic lubricants which typically break down within seconds at a load of a few kN. Our comparative experiments and analysis showed that this superextreme pressure lubrication capability of GBLM was attributed to the synergetic effect of the ultrafast heat dissipation of GBLM and the low friction coefficient of FeGa3 tribo-film. The present work demonstrated a novel way of improving lubrication capability by enhancing the lubricant thermal properties, which might lead to mechanical systems with much higher reliability.
机译：在非常高负荷下的两个物体之间滑动通常涉及分子/原子水平的直接固体固体接触，其机制远远明确公开。这些微观固体固体触点可以容易地导致粗糙表面的局部熔化。在极端条件下，这种局部熔化可以传播到整个界面的癫痫发作和焊接。传统上，基于其改进的机械性能，通过各种润滑剂和添加剂来缓解微观固体固体接触。在这项工作中，我们通过利用液态金属的高热扩散性，实现了极端压力润滑的最新，比一般有机润滑剂高2个数量级。将镓基液态金属（GBLM）的极压润滑性与四球试验中的齿轮油和聚α-烯烃进行比较。液态金属以极高的负载（10kN，四球测试仪的最大能力）润滑，以1800rpm的转速为几分钟的持续速度，比通常在内部分解的传统有机润滑剂更好几秒钟在几kn。我们的比较实验和分析表明，GBLM的这种俯仰压力润滑能力归因于GBLM超快散热的协同效应和Fega3摩擦膜的低摩擦系数。本工作证明了一种通过增强润滑剂热性能来改善润滑能力的新方法，这可能导致具有更高可靠性的机械系统。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号