作　　者： ; ; ;

机构地区： 华南理工大学机械与汽车工程学院

出　　处： 《机械工程材料》 2005年第2期48-51,共4页

摘　　要： 使用定速摩擦试验机研究了纳米CaCO3对半金属摩擦材料性能的影响。结果表明:在半金属材料中,用纳米CaCO3代替普通的CaCO3粉体,在混料过程中,纳米CaCO3粒子粘附在其他颗粒和钢纤维表面上,热压成型过程中,作为粘结剂的树脂材料与这些材料之间的结合强度降低。在摩擦过程中,造成表面颗粒在剪切力的作用下,很容易与基体脱离,从而使得摩擦材料的摩擦因数偏小,而磨损率却大大增加。 The tribological properties of semi-metallic friction materials with nano-SiC were studied. The results indicate that when nano-CaCO_3 powders substituted for the general CaCO_3 powders in a semi-metallic friction material, the friction coefficient of this material decreased and the wear increased. From the SEM images together with the experimental data analysis, it was shown that when the dry powders containing nano-CaCO_3 powders were mixed, the nano-CaCO_3 particles adhered to the surfaces of other ingredients, and the bonding strength between resin and ingredients was reduced during hot molding of the mixture. It induced that the steel fibers and grains were easy to be disengaged from the friction surface under shear stresses.

关 键 词： 纳米 制动 半金属摩擦材料 摩擦磨损

领　　域： [金属学及工艺] [一般工业技术] [金属学及工艺]