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The use of heat-insulating ceramic coatings on the cylinder walls of diesel engines is currently being considered for certain advanced engine designs. Since a major consideration in such an application is the wear resistance of the coatings, a series of tests has been carried out to determine the sliding wear behavior of several pairs of candidate materials systems, initially at room temperature. The tests were performed using a washer-on-disc specimen configuration and an oscillatory rotation movement to simulate the motion of a piston ring on a cylinder wall. It was determined that each material tested had a different pattern of sliding wear behavior. Impregnation of plasma-sprayed Y2O3-ZrO2 with chromia markedly improved its wear resistance. 相似文献
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1.IntroductionStraightchainalkylphosphineoxidemixtureCyanex923isonecommercialextractantsdevelopedbyCytecCanadaInc..ComparedwithotherphosphinereagelltsuchasTOPO,theextractatlthajsseveraladvantagesincludinglittleliablehydrolyzation,lowsolubilityinaqueo... 相似文献
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WANG Fudong LIU Xinfu Guan Zhichuan LIU Chunhua School of Petroleum Electronic Engineering China University of Petroleum Qingdao China Qingdao TSC Offshore Equipment Co Ltd. Qingdao China Received February revised September accepted October published electronically October 《机械工程学报(英文版)》2011,(6)
The existing design of the pumping systems mainly focuses on the approximate computational formulae and procedures,which are developed based on the analytic approaches of conventional oil/gas fields.The calculation of polished rod loads usually just concerns about the static and inertial loads.And the computation of gearbox torque generally uses empirical formulae and correction factors.The above modeling procedures,if applied to the coalbed methane(CBM) wells,can not give the desired accuracy of the system... 相似文献
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ＦＲＡＣＴＵＲＥＭＥＣＨＡＮＩＣＳＡＮＡＬＹＳＩＳＯＦＴＨＥＲＭＡＬＳＴＲＡＩＮＦＡＴＩＧＵＥＬＩＦＥＦＯＲＴＨＥＳＩＮＴＥＲＩＮＧＭＡＣＨＩＮＥＰＡＬＬＥＴＬＩＺｈｅｎｚｉａｎｄＬＩＭｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＡｒｃｈｉｔｅｃｔｎｒｅＥｎｇｉ... 相似文献
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ＡＤＥＶＥＬＯＰＭＥＮＴＳＴＵＤＹＯＦＣＡＳＴＣＯＰＰＥＲＡＬＬＯＹＷＩＴＨＨＩＧＨＳＴＲＥＮＧＴＨＡＮＤＨＥＡＴ－ＲＥＳＩＳＴＡＮＣＥＷＡＮＧＺｈｅｎｇ;ＲＥＮＣｈｅｎｘｉｎｇａｎｄＷＡＮＧＳｕｙｉｎｇ（ＤｅｐａｒｔｍｅｎｔｏｆＭａｔｅｒｉａｌｓＳ... 相似文献
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FANG Zheng ZHANG Hengzhong ZHANG Pingming HUANG Shengtang GUO Li HU Guoqiang 《金属学报(英文版)》1996,9(3):189-192
ＢＡＳＩＣＥＱＵＡＴＩＯＮＳＦＯＲＴＨＥＲＭＯ－ＥＬＥＣＴＲＯＣＨＥＭＩＳＴＲＹＡＮＤＴＨＥＥＮＴＲＯＰＹＣＨＡＮＧＥＯＦＴＨＥＳＴＡＮＤＡＲＤＨＹＤＲＯＧＥＮＥＬＥＣＴＲＯＤＥＲＥＡＣＴＩＯＮＦＡＮＧＺｈｅｎｇ,ＺＨＡＮＧＨｅｎｇｚｈｏｎｇ,ＺＨＡ... 相似文献
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依据合金特征晶体理论,固溶体中组元的原子状态分裂成若干特征原子状态,固溶体的晶格常数可由特征晶体的晶格常数相加定律,特征原子体积相加定律的特征原子状态相加定律求得,介绍了无序二元固溶体的９种晶格常数函数;确定了无序Ａｕ－Ｃｕ合金及其元的晶格常数函数;预计了Ａｕ３Ｃｕ,ＡｕＣｕ,ＡｕＣｕ３和相应有序合金随成分变化的晶格常数。理论值与实验符合较好。 相似文献
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