Friction and Wear Characteristics of Silicon Nitride in Bioethanol
Recently,bioethanol has been paid an attention as petroleum substitute fuel in automobile engine.Since reaction product of ethanol;aldehyde and formic acid are corrosive to aluminum based alloy used in engine parts,such as pistons or cylinders,new material instead of aluminum based alloy is needed for any sliding components in alcohol fuel engine.On this background,we conducted ball-on disk type friction and wear tests of silicon nitride in bioethanol.Two kinds of ethanol were used in this experiment;one is made from woods,and the other is made from corn (produced in Brazil).Authentic ethanol of 99.5％ and distilled water are also used for comparison.Experiments were made at the load ranged from 0.49 N to 9.8 N.The sliding speed was 200mm/s.Silicon nitride shows better lubrication performance in ethanol because of the generation of tribochemical reaction products having lubrication property.The friction coefficient of silicon nitride decreased as the increase of the applied load in three kinds of ethanol,among three kinds of ethanol tested,the ethanol group including two kind of bioethanol showed better lubrication performance than distilled water.However,the friction characteristic to the load was individually different.This is probably due to impurities in bioethanol are not effective to reduce the friction.
Bioethanol Ceramics Silicon nitride Lubricating property Tribochemical reaction
Tsuneaki Yamabe Hiroaki Yamaguchi Takashi Kawamura Yuji Enomoto Yuko Hibi
Faculty of Textile Science and Technology,Shinshu University,Japan National Institute of Advanced Industrial Science and Technology (AIST),Tsukuba,Japan
国际会议
杭州
英文
2008-10-15（万方平台首次上网日期，不代表论文的发表时间）