ISSN   1004-0595

CN  62-1095/O4

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王伟, 刘小君, 刘焜. 颗粒流润滑过程中粉末层的微观破坏形式和机理分析[J]. 摩擦学学报, 2012, 32(3): 258-263.
引用本文: 王伟, 刘小君, 刘焜. 颗粒流润滑过程中粉末层的微观破坏形式和机理分析[J]. 摩擦学学报, 2012, 32(3): 258-263.
WANG Wei, LIU Xiao-jun, LIU Kun. Micro Damages and Mechanism of a Powder Layer under Particulate Lubrication[J]. TRIBOLOGY, 2012, 32(3): 258-263.
Citation: WANG Wei, LIU Xiao-jun, LIU Kun. Micro Damages and Mechanism of a Powder Layer under Particulate Lubrication[J]. TRIBOLOGY, 2012, 32(3): 258-263.

颗粒流润滑过程中粉末层的微观破坏形式和机理分析

Micro Damages and Mechanism of a Powder Layer under Particulate Lubrication

  • 摘要: 将松散的石墨粉末导入到面接触摩擦副间隙中,对粉末层形成和破坏过程的宏、微观现象进行了跟踪和分析.通过对粉末层的电子、光学显微镜观察及能谱分析发现粉末层典型的生命周期包含完整、轻微破损、严重剥落和完全破坏4个阶段.利用光学显微镜观察到粉末层的鼓包、部分剥落、分层剥落和擦伤等微观现象,这些现象代表粉末层不同阶段的破坏状态和磨损程度.鼓包、部分剥落、分层剥落是粉末层破坏的早期形式.擦伤是粉末层破坏的严重形式,表明上试件和下试件发生了表面的直接接触并产生磨损,通常能够在粉末层完全破坏之前观察到.

     

    Abstract: Loose graphite powder is used to lubricate the plane contact tribopairs, and the formation and damage behavior of the powder layer is analyzed. The typical life cycle of a powder layer includes the full powder layer, partial detachment, serious detachment, and complete destruction, which can be concluded from the powder layer images and the analysis of the carbon and copper content remaining on the surface by scanning electron microscopy and energy dispersive X-ray spectroscopy. Layer blistering, partial detachment, delamination, and scuffing, which represent the different forms of damage and deterioration grades, are observed using an optical microscope. Layer blistering, partial detachment, and delamination are the damage forms that occur at earlier stages. Scuffing, which indicates direct contact and rubbing between the steel surface of the upper sample and the copper surface of the bottom sample, is a serious form of damage and is observed before the full destruction of the powder layer.

     

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