Experimental Study Of Wear Behaviours For Machinable Fluorophlogopite Ceramics

Two ceramics, fluorophlogopite glass-ceramic and Al₂O₃, were chosen for pin-disk wear tests. Each pair was composed of two samples. The wear tests were carried out for the eight pairs, such as glass-ceramic and bearing steel, glass-ceramic and carbon steel, glass-ceramic and high-speed steel, glass-ceramic and cemented carbide, Al₂O₃ and bearing steel, Al₂O₃ and carbon steel, Al₂O₃ and high-speed steel, Al₂O₃ and cemented carbide. Load, rotational speed and cooling condition were considered as test parameters. Friction coefficients and material wear rates were analyzed based on one parameter experiment. The worn surfaces were observed with optical microscope. The influence of test condition on wear behavior of glass-ceramic was studied.The increasing rotational speed enhanced the friction coefficients of pairs significantly. The friction coefficients at high rotational speed were much bigger than those at medium speed and low speed test condition. The friction coefficients of glass-ceramic in the dry friction test were much bigger than those at cooling condition. When the load was raised, the friction coefficients tended toward increasing at cooling condition. The increasing of rotational speed resulted in the rapid increase of wear rates. The wear rates of disk and pin at dry friction were much bigger than those at cooling condition. The apparent groove traces could be observed with optical microscope. The major wear form of glass-ceramic was abrasive wear and the second was adherence wear. The wear rates of both glass-ceramic and metal tended toward increasing when load was raised. The friction coefficients between Al₂O₃ and bearing steel were bigger than those between glass-ceramic and bearing steel.The results and data can be used as references for the engineering application, and theory base for machinable glass-ceramic wear performance.