銀基電接觸材料在繼電器中的應用研究.pdf

1、天津大學碩士學位論文銀基電接觸材料在繼電器中的應用研究姓名：竇富起申請學位級別：碩士專業(yè)：材料學指導教師：鄭冀20090501ABSTRACTThecontactbetweentwoconductorsiScalledtheelectricalcontactandtheelectricalcontactdevicesarethekeycomponentsoftheelectricalsignalandpowertransmissionI

2、nrecentyears，withthetherapiddevelopmentofthetelecommunications，automobilesandallkindsofelectronicproducts，varioustypesofrelaysgrowindemandfastTheelectricalcontactmaterialswhicharethekeycomponentsofrelays，haveaverylargema

3、rketIdealelectricalcontactmaterialsmusthavegoodstaticproperties，dynamicpropertiesandmechanicalprocessingpropertiesThestudieshaveshownthataddingdifferemadditivecanchangetheorganizationalstructureandimprovevariouspropertie

4、sofelectricalcontactmaterialsInthisdissertation，AgSn02electricalcontactmaterialsaddingofCe02andLa203werepreparedbythepowdermetallurgymethodTheelectricalpropertiesandthephysical—mechanicalpropertiesweremeasured，andtheimpa

5、ctofthetypeandthecontentofrareearthoxideonAgSn02materialstructureandpropertieshevebeenanalysedTheresultsshowthat，thebestadditivecontentofrareearthoxideforAgSn02contactmaterialis2％TheAgW，AgWC，AgSn02，AgCe02，AgLa203silverba

6、sedelectricalcontactmaterialswerepreparedWemeasuredtheconductance，densityandhardnessofthecontactmaterials，andthemi凹ostrucmreofthesurfacewascharacterizedbytheopticalmicroscopytheenvironmentalscanningelectronmicroscopeandt

7、heatomicforcemicroscope，respectivelyAelectricalcontactmaterialsdynamicperformancetestingsystemhavebeendesignedandassembledaccordingtothenationalstandardoftherelaysTheAgW，AgWC，AgSn02，AgCe02，AgLa203contactmaterialsweretest

8、edfortenthousandonoffcycles，andwemeasuredtheI／lasstransferandtheconductanceofthemTheresultsshowthattheAgWmaterialhastheminimummasstransferof55mgandasmallerconductancereductionAftertheonofftesting，theelectricalerodedregio