橡胶磨耗表面形貌及结构研究

Study on the Surface Morphology and Structure of Rubber Wear

磨耗特性是橡胶材料性能的重要功能性指标,而温度是影响橡胶材料磨耗特性的重要因素。针对目前橡胶磨耗特性和机理研究主要集中于常温条件这一问题,实验测试了不同温度和角度下的橡胶磨耗率,并利用LEXT OLS4000型3D测量激光显微镜和SU8010型扫描电子显微镜采集磨耗表面形貌图像及其微观结构特征参数,引入多重分形谱从理论上表征橡胶磨耗特性。通过综合分析宏观磨耗量、表面粗糙度特征参数和多重分形谱数据,进一步探究了橡胶磨损磨耗表面形貌及结构特点.研究发现磨耗随温度和角度的增大而增大,并与温度呈三次函数关系,与角度近似呈线性关系;粗糙度特征参数R_a呈现正态分布特征,并随着实验条件的变化发生整体偏移;多重分形谱谱图随温度、角度的增大呈现向下扩展和向右移动的趋势,谱宽△α和谱差△f(a)均增大。研究结果为进一步探究橡胶磨耗产生、演化和发展的规律及机理提供了依据.

Wear is an important performance functional index of rubber,and temperature is one of the key influential paratmeters for wear performance of rubber products.Aiming at the problem the present study on rubber wear properties and mechanism mainly focusing on the room temperature conditions,the wear rate of rubber at different temperatures and angles were measured experimentally.Images and micro-structure characteristic parameters of worn surface morphology of rubber were obtained by LEXT OLS4000 3D measuring laser microscope and SU8010 scanning electron microscop.The multifractal spectrum was introduced to characterize the wear properties of rubber.The rubber worn surface morphology and structure characteristics were further explored on the basis of the comprehensive analysis of wear rate,surface roughness and multifractal spectrum.The studies show that the wear increases with the increase of temperature and angle.The relationship between wear rate and temperature can be described by a third power function,and the relationship between wear rate and angle is linear.The roughness characteristic parameter R_a follows the Gauss distribution,and the R_a overall offset occurs with the variation of experimental conditions.With the increase of temperature and angle,the multifractal spectrum tends to expand downward and move right,and the spectral width △a and the spectral difference △f(a)both increase.The results provide a basis for further probing into the rubber wear law and mechanism of generation,evolution and development.