三维网络SiC陶瓷/金属复合材料摩擦性能的研究

以三维网络SiC陶瓷/Fe-Cu合金复合材料作为静片、三维网络SiC陶瓷/40Cr复合材料作为动片,研究了法向载荷、摩擦时间和pv值对该材料体系摩擦因数的影响以及摩擦次数对静片磨损量的影响,并采用金相显微镜观察了复合材料的显微结构和磨损表面形貌,分析了材料的摩擦磨损性能和磨损机理.结果表明:该摩擦副的稳定摩擦因数在0.33~0.35之间,摩擦过程中材料的磨损机理以磨粒磨损和粘着磨损为主,材料表面摩擦形成的氧化层硬度较高,是该材料耐磨性能优良的主要原因.

On the Friction Properties of 3D-meshy SiC Ceramics-Metal Composites

The 3D-meshy SiC-Fe-Cu composites and SiC-40Cr composites are used as stationary and moving specimens, respectively, in tribologic test. The influences of normal load, rubbing time and pv value on the coefficient of friction were studied, as well as the effect of friction frequency on the wear loss of the stationary specimen. The microstructure and worn surface morphologies of the composites were observed by metolloscope to analyze the friction/wear properties and mechanism. The results showed that the steady coefficient of friction of the friction pair tested is 0. 33-0. 35, and the wear mechanism is mainly due to the friction of abrasive grains and viscous friction. The hardness of oxide layer formed by surface friction on composite surface is high and provides mainly the high wearability for those composites.