基于原位和RNT技术的摩擦试验机及其实验研究

针对目前传统摩擦磨损试验机的不足之处,开发了一种基于原位和RNT技术的摩擦磨损试验机。在合理设计和选取试验机工作系统及主要部件的基础上,采用原位全息显微技术和放射性核素技术,实现了对摩擦过程中材料磨痕表面微观形貌的在线原位观察和磨损量的实时精确测量。利用试验机对CuZ n20/100Cr6进行摩擦磨损性能实验,并对试验后试样进行了X射线电子能谱分析(XPS)、扫描电子显微镜(SEM)和透射电子显微镜(TEM)分析研究。结果表明,磨痕表面形成耐磨层和晶粒细化是CuZ n20具有良好耐磨性的主要原因;试验机的实验结果精确,能为深入研究材料摩擦学行为提供重要参考依据。

Tribometer based on in situ and radionuclide technique and its characteristic experiment study

Aiming at the deficiencies of traditional tribometers, a new tribometer based on in situ and radionuclide techniques is developed in this paper. The working system and main components of the tribometer were designed and selected reasonably, based on which the in situ holographic microscopy and radionuclide techniques were applied in the tribometer to realize the on line in situ observation of the microstructure of the material grinding crack surface in the friction process and the accurate real time measurement of the wearing loss. The friction and wearing behavior experiments of the brass samples (i.e. 80% of copper and 20% of zinc) sliding against 100 of Cr6 under lubricated condition were conducted on the developed tribometer, and the samples were analyzed and studied with XPS, SEM and TEM after the experiments. The results indicate that the oxide layer formed on the grinding crack surface and the crystal grain refinement during the experiments are the main reasons for good wearing resistance of the brass sample. The experiment results obtained with the tribometer are accurate, which provides an important reference basis for deeply studying the tribological behaviors of materials.