$Al_2O_3-ZrO_2-Spinel$계 복합체의 미세구조 및 물성제어: II. 용액침투법에 의한 $Al_2O_3-ZrO_2-Spinel$ 복합소결체 = Control of Microstructures and Properties of Composites of the $Al_2O_3-ZrO_2-Spinel$ System: II. $Al_2O_3-ZrO_2-Spinel$ Composites Prepared by the Solution Infiltration Method

다국어 초록 (Multilingual Abstract)

Al2O3/ZrO2-Spinel composites were prepared by infiltrating magnesium sulfate solution into the porous preform made from Al2O3-20wt% ZrO2 composite powders derived through an emulsion route. The microstructure and composition of the modified composites could be controlled by manipulating the presingtering temperature of the preform, infiltration time, and so on. It was found that spinel phases were concentrated near the surface than in the interior of the Al2O3/ZrO2-Spinel composites infiltrated for 6hrs, while spinel phases were uniformly distributed in the comosites infiltrated for 2 days. The relative density and fracture toughness of the composite infiltrated for 6 hrs were 98.6% and 7.2MN/m3/2, respectively.