A Study on Tribology Behavior of The Polymer-Based Composite with Different Additives

• Main Authors: Po-I Kuo, 郭柏毅
• Other Authors: Yuan-Ching Lin
• Format: Others
• Language: zh-TW
• Published: 2014
• Online Access: http://ndltd.ncl.edu.tw/handle/73537276794174095930

碩士 === 國立臺灣科技大學 === 機械工程系 === 103 === This study focuses on the use of phenol formaldehyde (PF) and polyoxymethylene(POM) resin as the base materials associated with the additives of Cu, MoS2 and carbon fibers. Besides, the silane coupling agent was used for surface modification. Following, the twelve kinds of specimens of friction polymer matrix composites were manufactured by the hot pressing process. The cross sections, mechanical properties and thermal stability were investigated. Tribological performance of the specimens was evaluated by the ring-on-disc apparatus. The load of 0.21MPa and the sliding velocities of 0.53 m/s and 1.6 m/s were applied as the testing parameters. Friction coefficient, wear loss and worn surface morphology were observed. The results show that POM at low sliding speeds exhibited superior wear resistance. However, frictional heat to soften or melt the material resulted in the inferior wear resistance under the high sliding speed. Generally, the phenolic resin/ Cu-MoS2 specimen exhibited the best wear resistance because the addition of MoS2 improved the frictional behavior and reduced the interference between the sliding surfaces, leading to stable friction coefficient and smooth transfer films. Besides, the mix of Cu and MoS2 effectively reduced the agglomeration of MoS2, which increased the compressive strength for the MoS2 specimens, In addition, the variation on average of friction coefficient between 0.33 and 0.36 shows a potential development of pad material in brake systems.