Application of Powder Metallurgy Methods for Production of a Novel Cu‐Based Composite Frictional Train Brake Material [chapter]

Glenn Kwabena Gyimah, Zhongning Guo, Ping Huang, Dong Chen
2017 Powder Metallurgy - Fundamentals and Case Studies  
A novel Cu-based composite frictional train brake material composed of several elements such as Al, SiO 2 , Fe, graphite, Sn, Mn and SiO 2 re-enforced with other elements was treated under Powder Metallurgy (P/M) route. The materials were sintered at three different temperatures (850 C, 900 C and 950 C) at a constant pressure. The tribological behavior of these materials was analyzed by pad-on-disk tests without lubrication and the coefficient of friction, wear rate and wear number were studied
more » ... in order to identify the effects of the sintering temperature on the base materials composition. The pores in the sintered material were mainly solid lubricants such as graphite and other low melting elements. This resulted in poor hardness and mechanical properties, which were compensated by its ability to reduce seizure. The wear mechanisms that were generated are as follows; delamination, plowing and abrasive wear. The abrasive wear were dominant and found on samples sintered at 850 C and 900 C, it is seen to be responsible for high wear rates. The friction coefficient under high pressure (3.13MPa) dry conditions had average values of 0.404, 0.343, and 0.336, at 950 C, 900 C and 850 C respectively. The investigation of worn surface was assessed by using x-ray defractory and scanned electron microscope.
doi:10.5772/67533 fatcat:oa3lpc5uwfhsvdbth66z3v2cx4