不同类型颗粒混合增强铁基复合材料的磨损性能

发布时间：2018-07-28 19:19

【摘要】：采用电流直加热动态热压烧结工艺制备陶瓷颗粒增强铁基复合材料,研究高体积分数(25%,30%,35%)下,单一类型颗粒(SiC,TiC,TiN)及混合类型颗粒(TiC+TiN,SiC+TiN,SiC+TiC)作为增强相对铁基复合材料磨损性能的影响。结果表明:单一类型粒子强化时,TiNP/Fe复合材料的耐磨性最好,TiCP/Fe次之,SiCp/Fe最差。混合粒子作为增强体时,(TiC+TiN)P/Fe复合材料磨损性能显著优于其对应的单一颗粒增强材料;其中粒子含量为30%时,(TiC+TiN)P/Fe复合材料磨损性能提高最大,其磨损量比TiCP/Fe降低了51.9%,比TiNp/Fe复合材料降低了44.1%,体现出可贵的混合增强价值。(SiC+TiC)_P/Fe和(SiC+TiN)P/Fe复合材料的磨损性能分别处于对应的两个单一颗粒增强材料之间。磨损表面观察表明,耐磨性好的(TiC+TiN)P/Fe复合材料的磨损机理为磨粒磨损,而(SiC+TiC)_P/Fe和(SiC+TiN)P/Fe复合材料除磨粒磨损外还存在明显的疲劳磨损现象。
[Abstract]:Ceramic particle reinforced iron matrix composites were prepared by direct current heating and dynamic hot pressing sintering process. The high volume fraction (25% 30%) of iron matrix composites was studied. The effects of single type particles (sic _ C _ n) and mixed type particles (TiC) on the wear properties of iron matrix composites were investigated. The results show that the wear resistance of TiNP / Fe composite is the best when the single type of particle is strengthened, followed by TiCP-Fe / Fe and SICP / Fe is the worst. The wear properties of, (TiC TiN) P/Fe composites with mixed particles as reinforcements were significantly better than those of its corresponding single particle reinforced materials, and the wear properties of, (TiC TiN) P/Fe composites increased most when the particle content was 30. The wear capacity of the composites is 51.9% lower than that of TiCP/Fe and 44.1% lower than that of TiNp/Fe composites, which shows that the wear properties of. (SiC TiC) P / Fe and (SiC TiN) P/Fe composites are between the two single particle reinforcement materials respectively. The wear surface observation shows that the wear mechanism of (TiC TiN) P/Fe composites with good wear resistance is abrasive wear, while the wear mechanism of (SiC TiC) P / Fe and (SiC TiN) P/Fe composites is not only abrasive wear, but also obvious fatigue wear phenomenon.
【作者单位】：东北大学材料科学与工程学院各向异性与织构教育部重点实验室;
【基金】：国家自然科学基金资助项目(51171040,U1302272,51301035) 国家高技术研究发展计划(2013AA031601) 中央财政基本科研业务费(L1502028,N151004004)
【分类号】：TB333

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