摘要
研究钛酸钾晶须(PTW)对酚醛树脂基摩擦材料的摩擦磨损性能的影响,并与玻纤(GF)进行比较。结果表明,定速摩擦试验中,与GF相比,PTW填充摩擦材料摩擦因数变化幅度和高温段磨损率分别减小19%和20%;200℃后摩擦因数的衰退率降低。MPX-2000摩擦磨损试验中,填充PTW摩擦材料的最高摩擦面温度为333.3℃,低于GF的379℃;摩擦材料的磨损率和对偶件磨损失重分别比填充GF的降低19%和36%,摩擦因数更加平稳。SEM观察显示PTW能够促使对磨面上形成平整致密的转移膜。微小尺寸和晶须状形貌使PTW具有良好的显微增强作用,这是PTW填充酚醛树脂基摩擦材料具有良好摩擦磨损性能的关键。PTW的莫氏硬度小于GF,对对偶件的伤害更小。
The effect of potassium titanate whiskers（PTW） on the tribological properties of phenolic-based friction materials was studied and compared with that of glass fibers （GF）. The results of fixed velocity friction test show that the change ranges of friction coefficient and wear rate of PTW reinforced friction materials in high temperature region reduce by 19% and 20% respectively, the fade rate of friction coefficient after 200 ℃ decreases compared with GF. The test results of MPX-2000 tester show that the highest temperature of frictional surface of PTW （333.3 ℃ ） is lower than that of GF （379 ℃ ）. The wear rate of friction materials filled with PTW and wear mass loss of counterpart decrease by 19% and 36% compared with GF, its friction coefficient is stabler than GF＇ s. SEM analysis indicate that PTW is helpful to form smooth and compact transfer film on the surface of counterparts. Small size and whisker-like topography lead to good microscopic reinforced effect. These are key points of good wear and tribological properties of PTW reinforced phenolic-based friction materials. The Mohs hardness of PTW is less than that of GF, so PTW does less harm to the counterparts than GF.
出处
《润滑与密封》
CAS
CSCD
北大核心
2010年第7期30-35,共6页
Lubrication Engineering
基金
国家重点基础研究发展计划项目(2009CB623400)
国家科技支撑计划重点项目(2006BAE03B07)
中小企业创新基金项目(08C26223201858)
科技人才创新创业资金项目(200904008)
江苏省企业博士创新项目(BK2009497)
关键词
钛酸钾晶须
酚醛树脂基摩擦材料
摩擦磨损
转移膜
potassium titanate whiskers
phenolic-based friction material
firction and wear
transfer film
