Qhov zoo tshaj plaws, qhov txheeb ze ntawm cov alloy yuav tsum yog 100%, tab sis nyob rau hauv cov txheej txheem ntau lawm, tus nqi no nyuaj rau kev ua tiav vim muaj kev cuam tshuam ntawm ntau yam. Yog li ntawd, ib tug tooj liab-tungsten alloy nrog ib tug txheeb ze ntom ntawm tsis muaj tsawg tshaj li 97% yog suav hais tias yog ib tug zoo tagnrho W-Cu alloy. Yog li, dab tsi yam yuav cuam tshuam rau cov txheeb ze ntawm cov alloys?
Ua ntej tshaj plaws, peb yuav tsum hais txog cov khoom xyaw nyoos. Cov ntsiab lus oxygen hauv tungsten hmoov yog qhov tseem ceeb. Thaum cov hmoov tungsten muaj ntau cov oxides, cov oxides no yuav cuam tshuam kev sib raug zoo ntawm cov hlau vim tias cov dej ntub ntawm cov hlau thiab cov oxides tsis zoo. Qhov no txhais tau hais tias kev tswj cov pa oxygen hauv cov hmoov yog ib kauj ruam tseem ceeb los txhim kho qhov ntom ntawm cov hlau.
Qhov thib ob, qhov chaw oxide kuj yog qhov tseem ceeb uas tsis tuaj yeem tsis quav ntsej. Thaum lub sij hawm xovxwm txheej txheem, cov oxide nto ua rau nws nyuaj rau cov hmoov mus rau lub yas deformation vim nws siab elastic modulus, uas nyob rau hauv lem ua rau ib tug txo nyob rau hauv tus txheeb ze ntom ntawm cov tsim dawb paug. Ib yam li ntawd, thaum lub sij hawm sintering txheej txheem, cov hmoov tsis txaus yuav ua rau cov dej vapor, uas yog detrimental rau densification ntawm cov khoom.
Tsis tas li ntawd, cov purity thiab oxygen cov ntsiab lus muaj kev cuam tshuam ncaj qha rau ntawm qhov ntub dej ntawm tungsten hmoov. High purity, tsis tshua muaj oxygen cov ntsiab lus tungsten hmoov yuav muab tau zoo wettability, yog li kom ntseeg tau zoo tooj liab infiltration nyhuv. Thaum cov pa oxygen cov ntsiab lus ntawm tungsten hmoov nce, lub kaum sab xis ntawm tungsten thiab cov kua tooj liab yuav nce ntxiv, thiab cov dej ntub dej yuav dhau mus.
Thaum kawg, qhov loj me ntawm tungsten hmoov kuj yog ib qho tseem ceeb cuam tshuam. tungsten hmoov nrog ntau qhov sib txawv ntawm qhov sib txawv yuav muaj qhov sib txawv ntawm qhov sib txawv thiab kev sib cuag ntawm qhov chaw thaum lub sij hawm nias, uas cuam tshuam ncaj qha rau lub siab yuav tsum tau nias rau tib qhov ceev. Feem ntau hais lus, coarser tungsten hmoov hais tau yooj yim dua kom ncav cuag qhov xav tau ceev thaum nias. Qhov no yog vim hais tias ntxhib hais muaj ib tug muaj zog bridging nyhuv thiab muaj peev xwm zoo dua kis tau tus pressing siab, yog li ua rau cov particles zoo sib xws. Nyob rau hauv sib piv, lub porosity ntawm nplua porous tungsten hmoov yog me me, uas txhais tau hais tias cov hmoov zoo muaj ntau dua lub zog dawb thaum sintering, uas yog ntau conducive rau sintering. Yog li ntawd, cov hmoov zoo yog qhov tsim nyog rau qhov ntom ntom ntawm tungsten-tooj liab alloy.
