【摘要】 将粒径为1～3 mm的ZTA(ZrO2增韧Al2O)3陶瓷颗粒与自制粘结剂均匀混合后填充到具有蜂窝状内腔的模具中固化后获得蜂窝状多孔陶瓷预制体,浇注高铬铸铁金属液铸渗陶瓷预制体成功制备出ZTA陶瓷颗粒增强高铬铸铁基耐磨复合材料,并考察了复合材料的三体磨料磨损性能。结果表明:复合材料中陶瓷颗粒的体积分数为48%～58%;陶瓷颗粒与基体界面致密,无缩孔、裂纹等缺陷;经热处理后复合材料的耐三体磨料磨损性能是工程中常用的Cr20高铬铸铁的5.9倍。更多还原

【Abstract】 The porous ceramic preforms were fabricated by firstly mixing the ZTA(ZrO2 toughened Al2O3)ceramic particles of 1 to 3 mm in diameter and self-made binder,then put the mixture into a die with honeycombing cavity,and finally a porous ceramic preforms can be obtained after solidification.ZTA particle reinforced high chromium cast iron matrix composites have been prepared successfully by pouring the liquid metal to the porous ceramic preforms.The three-body abrasive resistance of the composite has been investigated.The results show that the volume fraction of ceramic particle in the composite is 48% to 58%,and the interface between ceramic particle and matrix is compact,there are no defects such as porosity,crack and so on.The three-body abrasive resistance of the composite after heat treatment is 5.9 times higher than that of Cr20 cast iron.更多还原