Investigation on wear-resistant properties of Al2O3/SiC nano composite ceramics in fused zinc

Al2O3/SiC nano composite ceramics can replace wear-resistant and heat-resis tant alloys used in preparing the arm-bush that is the key parts in the equ ipment of galvanizing steel strip. Conventional alloy for arm-bush could on ly operate 4 similar to7 days, and the ceramic Arm-bush can operate more th an 100 days continuously tested in the same equipment and its service life has increased 15 times more than that of alloy. According to the results of microstructure analysis, one of the most important cause that the composit e ceramics possess excellent wear-resistant properties in the fused zinc is that nano SiC particles have existed within fine grains of Al2O3.