CAJ | 학술논문

以Si粉和SiC为原料,采用半干法冷等静压成型,通过反应烧结成功制备了Si_3N_4-SiC复相耐磨材料.并将其和95Al_2O_3耐磨陶瓷在以水和SiC混合颗粒为冲蚀介质实验条件下,进行液固两相流冲蚀磨损对比实验.结果表明:原料中Si粉加入量为40%～80%(质量分数)试样的耐冲蚀磨损性能优于95Al_2O_3耐磨陶瓷.原料中Si粉加入量为70%试样的耐固液两相流冲蚀磨损性能最好,在平均线速度分别为132和67 m/min的实验条件下的冲蚀率分别仅为0.87%和0.30%.此外,通过SEM观察了冲蚀后试样的显微形貌,探讨了其耐液固两相流冲蚀磨损的机理.
이Si분화SiC위원료,채용반간법랭등정압성형,통과반응소결성공제비료Si_3N_4-SiC복상내마재료.병장기화95Al_2O_3내마도자재이수화SiC혼합과립위충식개질실험조건하,진행액고량상류충식마손대비실험.결과표명:원료중Si분가입량위40%～80%(질량분수)시양적내충식마손성능우우95Al_2O_3내마도자.원료중Si분가입량위70%시양적내고액량상류충식마손성능최호,재평균선속도분별위132화67 m/min적실험조건하적충식솔분별부위0.87%화0.30%.차외,통과SEM관찰료충식후시양적현미형모,탐토료기내액고량상류충식마손적궤리.
Si_3N_4-SiC composites were fabricated from the compact of Si powder and SiC formed by cold isostatic pressing via reactive sintering in nitrogen atmosphere. And contrast experiments of liquid-solid two-phase erosion-wear were taken with 95Al_2O_3 wear resistant ceramic using water and SiC particles as erosion medium. The results showed that erosion-wear resistance of samples with the addition of 40～80wt% Si powder was better than that of 95Al_2O_3 wear resistant ceramic. And the sample with the addition of 70wt% Si powder possessed an optimum liquid-solid two-phase erosion-wear property. The erosion rate were only 0.87% and 0.30% under a line speed of 132 m/min and 67 m/min, respectively.