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以微米Al_2O_3为主要原料,以纳米ZrO_2和TiC作为添加剂,以微米Y_2O_3粉作为烧结助剂,采用热压烧结工艺制备了氧化铝基复合金属陶瓷模具材料。分析了样品的抗折强度、硬度以及断裂韧性等性能,采用现代材料测试手段对最佳烧结样品的显微结构进行了分析。结果表明,最佳烧结温度为1660℃;当微米Al_2O_3添加量为74wt%,纳米ZrO_2为18wt%、纳米TiC为6wt%以及微米Y_2O_3粉添加量为2wt%时,所制备的氧化铝基复合金属陶瓷模具材料性能最佳,抗折强度912.78 MPa,硬度19.856 GPa,断裂韧性5.84 MPa·m1/2。
Alumina-based composite metal-ceramic mold material was prepared by hot-press sintering with micron Al 2 O 3 as the main raw material, nano-ZrO 2 and TiC as additive, micron Y 2 O 3 powder as sintering aid. The flexural strength, hardness and fracture toughness of the samples were analyzed. The microstructure of the sintered samples was analyzed by modern materials testing methods. The results show that the optimum sintering temperature is 1660 ℃. When the additive amount of Al 2 O 3 is 74wt%, the content of nano-ZrO 2 is 18wt%, the content of nano-TiC is 6wt% and that of micron Y_2O_3 powder is 2wt%, the prepared alumina matrix composite metal The best performance of ceramic mold material, the flexural strength of 912.78 MPa, hardness 19.856 GPa, fracture toughness 5.84 MPa · m1 / 2.