難熔金屬的空心陰極等離子燒結(jié)工藝研究.pdf

1、北京工業(yè)大學(xué)碩士學(xué)位論文難熔金屬的空心陰極等離子燒結(jié)工藝研究姓名：牛宇鋒申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：材料學(xué)指導(dǎo)教師：王從曾20060601ABSTRACTThehollowcatllodesintel婦gisakindofm曲一tempe咖resimeringIneaIlsWhichmakeuseofmeheatinge虢ctwhichproducedbyhi曲一densitybi分energyionwhen910wdischargefbm

2、ledh01lowcathodedischargeNow，theh01lowcathodesinteringhavebeenusedin也epreparationofironbasepowerandAINcer蕊cs，butthereislitcleresearchinsinteringllighmeltingpoimre丘actorymetal(T如gsten，Molybdenum，Niobium，Tamal啪etc)nlismesi

3、sresearchedmeignitionVoltageofhollowcamode，disch盯gecurrent，血echaracterofheatingupandtheinfluenceofpressIlreandvoltageVscurrentaIldternper咖re，ailddischargecharacterofhollowcathOdeAt廿1es咖etime，Iresearcheddischargecharacter

4、ofdi任eremhollowca血ode，arldmeinfluenceOfcathodesizevsdisch釕gecharacterThea_utlorpreparedhighermelting—pointme詛l—TungstenandCeriurnTungstena110yanddidhollowca血odesinteringeXperime毗s，researched也einnuenceofcurrent，Voltage，si

5、meriIlgtemperatureVsthes詛bmzationofdischargeinhollowca吐lode，andmeinnuenceofallkindsoftechnolo酉calconditionsvssintel虹gconsequenceIalsoanalyzedopticalmicros鈿cture，micr0hardllessetca11dsomespecialanalysisofh01lowcamodedisch

6、argeusinginsinteringre矗actorymetalsThecharacterexperimentSindicate：Vd(igIlitedv01tage)hei曲tencdwit1tleincreaseofd(di蛐eter)ora(space1eng血)，whenp(pressurc)doesnotchange；Vdheightened晰tllthe婦reaseofp，whendoradoesnotchangeThe

7、t、vocathodemasked，whenthevalueofaordistoolitne，cannotignitedhollowcathodeho、vevermeVoltageishiglLOnlythecertaincombinationrangeofapordp，itcanproducehOllowcamodedischarge，t11enegativeglOwdis塒ctcanoVerlapint11ecathOdeIclea

8、redtllerelationshjpbet、veencurrent，Voltagcandsinteringtemperature，觚d恤relationsMpbet、veendensit)，andsinteringtemperature，holdingtime，mroughouthollowc弛odesin跳geXp髓in圮nts，generalizingexperiences，analysisdataIobt出ed恤sustaine

9、dand鼢lehollowc砒odedischargee＆ct，throughomratio戚adj戚ofallkindSoftechnolo酉calcondmonssuchascu玎眥，vol_【age，恤K幽esttemperaturereach2500℃Iobtainedhighdensitysinteredbody，thehighestdensityreachl799／cm’，thfoughoutrationalheating—