Lin Ronghui1,Xi Yingxin2,Shao Yanxia2£¬Fang Liang1
(1.School of Material Science and Engineering,Xi'an Jiaotong University,Xi'an 710049,China;2.School of Sciences,Xi'an Jiaotong University,Xi'an 710049,China)
Abstract:The phenolic resin modified by nano-particle copper was successfully prepared with in situ co-producing method,and the prepared resin was characterized by X-ray diffraction and transmission electron microscope.It was found that the particles with 10-40 nm in diameter were perfectly dispersed in the phenolic resin.The effects of nano-particle copper on phenolic resin and the friction materials were studied via thermogravimetric analysis,impacting tests and friction-and-wear experiments.The results indicate that the initially decomposed and half-decomposed temperatures of the phenolic resin rise firstly and then drop with the increase of the nano-particle content,and reach to the maximum as the particle mass fraction approaches to 7£¥.The impact strength of the phenolic resin is enhanced firstly and then weakened with the increase of the nano-particle content and reaches to the maximum at the mass fraction of 5£¥.The tribological properties of friction materials can be improved by adding the nanoª²particles,and the heat fade and wear rate can be remarkablely lowered,especially at high temperature£®
Keywords:in situ co-producing method;nano-particle copper;phenolic resin; friction material