Friction and wear property of ceramic seals against materials in water

• Main Authors: Ying-Chia Huang, 黃盈嘉
• Other Authors: Kuo-Ming Chang
• Format: Others
• Language: zh-TW
• Published: 2008
• Online Access: http://ndltd.ncl.edu.tw/handle/97392475467074932218

碩士 === 國立高雄應用科技大學 === 機械與精密工程研究所 === 96 === The purpose of the present study is to find out the optimal mating pairs of seal materials from the wear and friction performance of the mating pairs. From the combinations between various ceramic materials (e.g. SiC, graphite, WC, Al2O3、ZrO2 and Si3N4), they are tested on the Model Tester under conditions of dry and water lubrication to discuss the wear and friction performance of the mating pairs. In addition, pin-on-disk (POD) tribological test and the optical microscope and surface roughness apparatus are utilized to generate tribological data, to analysis of the experimental data, respectively. The correlations of POD and Model Tester are discussed. The first part is to simulate the realistic mating conditions in Model Tester which was designed by SCENIC. SiC, graphite and WC ceramic materials are used to match against impregnation resin graphite and impregnation antimony graphite.The Model Tester is modified to realize on-line monitoring the temperature.From the measured temperature and surface roughness, and investigates the lubricant states for various material on seal using experimental results. Furthermore, the anatomic and function are analyzed using OM and surface roughness apparatus. As the results, both the impregnation resin graphite A and impregnation antimony graphite A are the optimal material for heating behavior, The impregnation antimony graphite A have steady heating behavior. Temperature rises 14℃ that experiment initial 10 minutes. And temperature rises 1℃ that experiment final 10 minutes. the temperature as time reduces and the controllability is stable, hence, the impregnation antimony graphite disk are matched with ball of Al2O3, ZrO2, Si3N4, steel. Experiment second part for use POD and AD/DA system to record friction coefficient.Discuss different load condition of Si3N4、Al2O3、ZrO2、Stainless steel materials of friction and wear property in the dry and water lubrication. According to the data to drew the friction coefficient and analyse，the purpose is compare that different mating pairs material.The anatomic and function are analyzed using OM and surface roughness apparatus. Experimental result display that friction coefficient will be reduced in water lubricating. Such as the Al2O3, the friction coefficient is 0.329 in dry lubricate higher than 0.047 in water. In load 30N,water lubrication,After experiment about 15 hours (slip distance 30000m),The friction coefficient can faster through the running-in, then to make the friction coefficient reach steadily. And we find the ceramic／graphite than the metal／graphite have more quality wear property. About wear rate, No matter the dry or water lubricated. Impregnation resin graphite of wear rate higher than impregnation antimony graphite. Such as Impregnation resin graphite disk／Al2O3 ball of wear rate（1.2169％） higher than impregnation antimony graphite disk／Al2O3（0.3549％）.