The wear mechanism of ceramic grinding balls is divided into brittle fracture wear and plastic deformation wear. The former's wear characteristic is the shedding of grains along intergranular fracture, and the latter's wear characteristic is the microscopic cutting of transgranular fracture. The former has a much higher wear rate than the latter. It is expected that the wear of ceramics is plastic deformation wear. The internal factors of ceramics have an important influence on the plastic deformation wear mechanism of ceramics. Alumina ceramic balls are a kind of friction and wear components, and their wear rate is affected by internal factors and external factors, of which internal factors have a greater influence.
The wear resistance of ceramic grinding balls is closely related to the mechanical properties of its own materials and the synergistic effect of the microstructure, that is, its internal factors, elastic modulus, hardness, fracture toughness, grain size, grain boundary and porosity, A lot of research has been done on this. The toughness and grain size of ceramics are the most studied internal factors that are most closely related to wear resistance. Toughness has a great impact on the friction and wear of ceramic grinding balls. The better the wear resistance of the grinding ball, so the wear-resistant ceramics are developing in the direction of microcrystallization. However, the cost of nano-ceramic grinding balls is very high, and it is difficult to promote the use in engineering applications. Therefore, the research focus of wear-resistant materials for ceramic grinding balls has made breakthroughs and developments within a few micrometers of grain size.
