微结构砂轮对不同陶瓷的磨削性能

Grinding performance of micro-texured grinding wheel on different ceramic materials

基于阵列微孔的微结构砂轮和普通砂轮对氧化铝、氮化铝、氧化锆及氮化硅陶瓷材料的不同磨削性能,对比研究不同砂轮和不同陶瓷材料的磨削力、比磨削能、表面粗糙度及表面崩边特征。结果表明:相比普通砂轮,微结构砂轮提高了氧化铝、氮化铝及氧化锆陶瓷的磨削力和比磨削能,降低了表面粗糙度,而对氮化硅陶瓷的磨削力及表面粗糙度影响不明显;相比其他陶瓷,氮化硅陶瓷具有较高的磨削力和比磨削能。从磨削加工表面特征上看,氧化铝、氮化铝陶瓷以脆性去除方式为主,氧化锆以塑性去除为主,而氮化硅则兼具塑性和脆性去除特征;微结构砂轮加工表面崩边尺寸大于普通砂轮的崩边尺寸,氧化铝和氮化铝陶瓷的表面崩边尺寸明显大于氧化锆和氮化硅陶瓷的。

The grinding performance of micro-textured grinding wheel with arrayed micro-hole and common grinding wheel are compared through experiments on alumina,aluminum nitride,zirconia and silicon nitride ceramic materials.The grinding force,the specific grinding energy,the surface roughness and the surface chipping are analyzed.In comparison with common grinding wheel,micro-textured grinding wheel improves the grinding force and the specific grinding energy in grinding of alumina,aluminum nitride and zirconia ceramics,reduces the surface roughness of these ceramics,but has a little effect on the grinding force and the surface roughness of silicon nitride ceramics.Silicon nitride has higher grinding force and specific grinding energy than other ceramic materials do.The surface characteristics of alumina and aluminum nitride mainly imply brittle removal mode,while a ductile removal mode is characterized on the surface of zirconia and silicon nitride has both plastic and brittle removal characteristics.The surface chipping thickness processed by the micro-textured grinding wheel is larger than that of the common grinding wheel,while the surface chipping thickness of both alumina and aluminum nitride ceramics is larger than those of zirconia and silicon nitride ceramics.