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.
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.
参考文献
| [1] | 姜晓霞.金属的腐蚀磨损[M].北京:化学工业出版社,2003:122. |
| [2] | 董文麟.氮化硅陶瓷[M].北京:中国建筑工业出版社,1987 |
| [3] | 黄朝晖.[J].耐火材料,1990(05):10. |
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