Synthesis of ZrO2—Al2O3 Ultrafines Composites and Their Sintering Behavior

摘要

Four kinds of ultrafies were manufac-tured by different methods,Sintering behavior,mechanical properties,thermal shock resis-tance and microstructure were studied,ZrO2 grains and Al2O3 grains can inhibit each other's growth during sintering process,ZrO2-Al2O3 comosites have higher sintering temperatures than single Y-ZrO2 or Al2O3 materials,Proper ZrO2 addition can reinforce and densify Al2O3 ultrafines material as well as improve thermal shock resistance,20wt% Al2O3 doped to 3Y-ZrO3 material is beneficial to stability of ZrO2 materials,the bend strength can reach 817.8 MPa.