《Optimization of the surface texture for silicon carbide sliding in water》.pdf

Applied Surface Science 253 (2006) 1282–1286 /locate/apsusc Optimization of the surface texture for silicon carbide sliding in water Xiaolei Wang a,b,*, Koshi Adachi a, Katsunori Otsuka a,c, Koji Kato a a Laboratory of Tribology, School of Mechanical Engineering, Tohoku University, Sendai 980-8579, Japan b College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China c Koyo Seiko Co., Ltd., 24-1 Kokubu, Higanjo-cho, Kashiwara 582-8588, Japan Received 5 December 2005; received in revised form 28 January 2006; accepted 31 January 2006 Available online 9 March 2006 Abstract Surface texturing has been recognized as an effective means to improve the tribological performances of sliding surfaces. Usually, generation additional hydrodynamic pressure to increase the load carrying capacity is regarded as the most significant effect of surface texture. In the case of silicon carbide sliding against identical material in water, the experimental results indicate that surface texture is also helpful to improve the running-in progress to smooth the contact surfaces, showing another reason to result in low friction. Based on the consideration of enhancing the generation of hydrodynamic pressure and improving running-in progress, a surface texture pattern, which was combined with large (circle, 350 mm in diameter) and small (rectangular, 40 mm in length) dimples, was designed to maximize the texture effect on the load carrying capacity of SiC surfaces sliding in water. The friction coefficient of such textured surface was evaluated and compared with that of untextured and those o