【摘要】 在粉末冶金铜基摩擦材料中添加6%（质量分数）的SiO₂/ZrO₂复合陶瓷组元,研究SiO₂和ZrO₂的质量分数对摩擦材料摩擦磨损性能的影响,并分析其机理。结果表明:随w（SiO₂）/w（ZrO₂）比值减小,铜基摩擦材料的密度和硬度增大。高速制动时,摩擦材料的摩擦因数和摩擦稳定因数较小。SiO₂可有效提高摩擦因数,ZrO₂可降低摩擦副的磨损率。当w（SiO₂）/w（ZrO₂）为2/4时,摩擦材料具有较好的摩擦磨损性能,高速制动下平均摩擦因数为0.326,摩擦稳定因素处于较高水平,为0.71,对偶数材料损伤在可接受范围内。SiO₂较易脱落而形成磨粒,ZrO₂与基体界面结合状态较好,所以随SiO₂含量减少,主要磨损机制从磨粒磨损转变为黏着磨损和磨粒磨损,最后转变为剥层磨损。更多还原

【Abstract】 6%（mass fraction） SiO₂/ZrO₂ composite ceramic components was added into powder metallurgy copper-based friction materials to study the effect of the mass fraction changes of SiO₂ and ZrO₂ on the friction and wear properties of friction materials,and analyze the friction and wear mechanism of materials.The results show that with increasing w（SiO₂）/w（ZrO₂）,the density and hardness of the copper-based friction material increase.When braking at high speed,the friction coefficient and friction stability factor of friction material are small.SiO₂can effectively improve the friction coefficient,and ZrO₂ can reduce the wear rate of the friction pair.When w（SiO₂）/w（ZrO₂） is 2/4,the average friction coefficient during high-speed braking is 0.326,the friction stability factor is 0.71,which is at a high level,and the damage of the dual material is within the acceptable range,so the material has a relatively good friction and wear performance.SiO₂is easy to fall off to form abrasive particles,and the interface between ZrO₂ and the matrix is in a better bonding state,so as the content of SiO₂decreases.The main wear mechanism changes from abrasive wear to adhesive wear and abrasive wear and finally to delamination wear.更多还原