Effects Of Solid Lubricants On Friction Performance Of Ceramic Friction Materials And Friction Mechanism Of Ceramic Friction Materials

Solid lubricants are one of the important ingredients in brake friction materials and play critical roles in stabilizing friction coefficient, depressing specific wear rate and do not damage the cast iron disc.Latin square coupled with Golden Section approach was utilized for experimental formulations design. Friction performance of ceramic friction material samples was tested. The friction layer was characterized by SEM and EDX.The friction performance of different friction formulations was compared by friction performance test. The experimental results indicate that as improvement of friction performance as concerned, MoS₂ is excellent, natural graphite is good, and Sb₂S₃ is fair.The best formulations were obtained. When the percentage of solid lubricants was 5.6 vol. % , the performance of ceramic friction material was best.The weight loss of three solid lubricants were measured in air by the method of thermogravimetric analysis (TGA) and differential scanning calorimetry(DSC). The result showed that the thermo behavior of solid lubricants played an important role in friction process.