稀土对Al_2O_3-TiC/Fe基金属陶瓷材料性能的影响

Influence of Rare Earth on the Properties of Al_2O_3-TiC/Fe Based Metal Ceramic Materials

以TiC、C、Mn、Ni、Mo、α-Al2O3微粉和还原Fe粉为主要原料,采用粉末冶金方法制备Al2O3-TiC/Fe金属基陶瓷材料。利用管式真空烧结炉(150 mm)高真空(2.5 Pa)烧结,烧成温度为1530℃,保温时间90 min。研究探讨不同稀土添加剂对试样吸水率及体积密度的影响,揭示材料的耐磨性能,以及稀土添加剂对试样的显微组织影响。试验表明:在以上条件下,添加0.3%的Y2O3时,Al2O3-TiC/Fe基金属陶瓷材料的吸水率和体积密度达到了最佳状态,分别为0.0310%和6.7770 g/cm3,此时材料的耐磨性能得到提高。

Al2O3-TiC / Fe metal-base ceramic composite materials were prepared by means of powder metallurgy method with TiC, C, Mn, Ni, Mo, α-Al2O3 powders and reduction of Fe powder as the main raw materials. It was sintered in a tube vacuum sintering furnace（6 150 mm）with high vacuum of 2.5 Pa, 1530℃, holding time of 90 min. The influences of different rare earth on water absorption, bulk density, microstructure and wear-resistant property were investigated. The results show that the water absorption and bulk density （0. 0310% and 6. 7770 g/cm3 respectively） of Al2O3-TiC / Fe cermets wear the optimum by doping 0. 3wt% Y2O3, and the wear resistance is improved.