Kev tsim ntawm molybdenum thiab nws cov alloys tsis yog tsuas yog hais txog kev kos duab cov qauv, tab sis kuj yog ib qho kev tsim qauv zoo raws li kev sib sib zog nqus ntawm cov khoom siv thiab cov kev pabcuam ib puag ncig, tsom rau kev ua tau zoo, kev ua neej ntev, thiab kev ua tau zoo. Hauv cov teb uas xav tau qhov kub thiab txias, siab zog, tiv thaiv corrosion, thiab tshwj xeeb electromagnetic ib puag ncig, qhov tshwj xeeb zoo ntawm molybdenum alloys yuav tsum tau muab txhais ua cov kev daws teeb meem txhim khu kev qha los ntawm kev tsim qauv suab.
Nyob rau theem pib tsim, cov ntaub ntawv kev ua tau zoo yog qhov tseem ceeb los txheeb xyuas cov cim tseem ceeb ntawm molybdenum thiab nws cov alloys -high melting point, high thermal conductivity, low coefficient of thermal expansion, and excellent recrystallization resistance-and correlates with the expect service conditions. Piv txwv li, nyob rau hauv aerospace engine nozzle tsim, lub siab zog ntawm molybdenum alloys saum toj no 1600℃yuav tsum tau siv tag nrho, thaum lub teeb yuag thiab optimized tshav kub khiav txoj kev txo lub zos thermal kev nyuaj siab concentration thiab ncua kev tiv thaiv lifespan.
Multi-scale structural synergy yog ib qho ntawm cov ntsiab lus tseem ceeb. Nyob rau theem macroscopic, geometry thiab kev ntxhov siab faib khoom ntawm cov khoom yuav tsum raug txiav txim siab los tiv thaiv kev ntxhov siab thiab thermal qaug zog tawg pib thaum ua haujlwm. Nyob rau theem microscopic, yuav tsum tau them nyiaj mloog mus rau grain orientation, grain ciam faib, thiab precipitated theem morphology, coj cov tsim ntawm microstructures conducive mus rau siab - kub stability thiab creep resistance los ntawm cov txheej txheem tsim. Rau cov khoom uas yuav tsum tau vuam los yog brazing, tshav kub- cuam tshuam cheeb tsam tsis muaj zog ntsuas yuav tsum tau tshwj tseg thaum lub sij hawm tsim kom tsis txhob muaj kev sib koom ua haujlwm degradation.
Txheej txheem compatibility tsim yog sib npaug indispensable. Molybdenum alloys muaj qhov txwv tsis pub siv tau thiab chav tseem ceeb -kub brittleness. Cov qauv tsim yuav tsum tau rationally npaj cov txheej txheem sib lawv liag thiab kev kho cua sov, sib txuas ua haujlwm txias thiab kub kom txo tau qhov kev pheej hmoo ntawm kev tawg. Piv txwv li, kev tsim cov txheej nyias nyias- cov phab ntsa tuaj yeem txais kev sib txuas ntawm ntu kub molding thiab kev ntxhov siab tom qab-relieving annealing kom sib npaug cov duab raug thiab cov khoom siv.
Tsis tas li ntawd, tus qauv tsim yuav tsum suav nrog kev tsim khoom thiab kev xav txog nyiaj txiag. Thaum ua tau raws li cov kev xav tau ntawm kev ua tau zoo, qhov kev nyiam tshaj plaws - cov duab thiab qhov loj me rau kev tsim khoom loj yuav tsum raug xaiv los txo qis kev siv cov khoom tsis tshua muaj thiab kev ua haujlwm nyuaj, yog li txhim kho cov saw hlau ruaj khov. Rau cov khoom siv hluav taws xob zoo xws li cov khoom siv hluav taws xob, ntoo khaub lig- cov khoom siv interface optimization tsim yog yuav tsum tau, suav nrog thermal conductivity, hluav taws xob conductivity, thiab thermal expansion txuam qhov yuav tsum tau, kom ntseeg tau tias cov cuab yeej kev ntseeg siab nyob rau hauv siab - lub zog ua haujlwm.
Hauv cov ntsiab lus, kev tsim lub tswv yim ntawm molybdenum thiab nws cov alloys yog raws li qhov zoo ntawm cov khoom siv, kev koom ua ke kev pabcuam ib puag ncig kev tsom xam, ntau- nplai kev ua kom zoo dua qub, txheej txheem kev npaj, thiab tag nrho lub neej- kev tswj hwm tus nqi los tsim ib txoj hauv kev tsim qauv rau huab cua, yog li ua tiav cov ntawv thov siab -3} kev ua haujlwm siab.
