Phase composition of SiC-ZrO2 composite materials synthesized from zircon doped La2O3  

作　　者：MA Beiyue YU Jingkun 

机构地区：[1]School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China

出　　处：《Journal of Rare Earths》2009年第5期806-810,共5页稀土学报（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (50274021) and Baoshan Iron and Steel Co., Ltd.

摘　　要：A study was carried out to determine the optimum parameters for synthesis of SiC-ZrO2 composite materials by carbothermal re-duction of zircon. Test samples were prepared by mixing average mesh size of less than 30 μm of carbon black and 40 μm of zircon with C/ZrSiO4 mass ratio of 0.2 and the extra addition amount of La2O3 was 0, 1 wt.% and 2 wt.%. Prepared samples were subjected to the car-bothermal reduction process at temperatures of 1723, 1753, 1773 and 1803 K for 4 h, respectively. The carbothermal reduction process was conducted in an atmosphere controlled tube furnace at an argon flow of 1.5 L/min. All products were examined by X-ray diffraction (XRD) to determine the transformation. The results showed that the best transformation of SiC-ZrO2 composite materials occurred at 1803 K for 4 h with the amount of 2 wt.%La2O3.

关 键 词：composite materials carbothermal reduction ZIRCON LANTHANUM oxide RARE earths 

分 类 号：TF845-55[冶金工程—有色金属冶金]