B4C包覆ZTA颗粒增强铁基复合材料制备与性能

Preparation and Properties of the ZTA Particles Cover with B4C Powder Reinforced Iron Matrix Composites

中文关键词: 复合材料 界面过渡区域 高铬铸铁 预制体 三体磨料磨损

英文关键词: composites, interface transition zone, high chromium cast iron, preform, three-body abrasive wear

中文摘要:

      ZTA (ZrO₂增韧Al₂O₃)陶瓷颗粒表面包覆B₄C微粉,将其制备成蜂窝状结构陶瓷预制体。采用传统重力浇注工艺将陶瓷预制体与熔融的高铬铸铁(HCCI)金属溶液进行复合,获得ZTA陶瓷颗粒增强高铬铸铁基复合材料。对复合材料中ZTA陶瓷颗粒增强相与高铬铸铁基体之间的界面及复合材料的耐磨料磨损性能进行了研究。结果表明,ZTA陶瓷颗粒与高铬铸铁界面结合处形成了明显的过渡区域,界面过渡区域的存在提高了陶瓷颗粒与金属基体的结合,从而提升了复合材料的整体稳定性能。同时,三体磨料磨损试验表明该复合材料的耐磨料磨损性能是高铬铸铁的3.5倍左右。

英文摘要:

      The surface of the ZTA (ZrO₂ toughened Al₂O₃) ceramic particles cover with B₄C powder. The ceramic particles were prepared into a ceramic preform with honeycomb structure. The composites of ceramic particles reinforced high chromium cast iron matrix was fabricated by the molten HCCI casting infiltrate the preform. The interface between the ZTA ceramic particles and the high chromium cast iron were studied and the wear resistances of the composites were also studied. The results show that the interface transition zone was formed at the interface between the ZTA particles and the high chromium cast iron. The existence of the interface transition layer can improve the combination of the ceramic particles and metal matrix that improve the overall stability of the composites. At the same time, the three-body abrasive wear test shows that the wear resistance of the composites is higher than the high chromium cast iron about 3.5 times.