Kev Tshawb Fawb thiab Kev Siv Cov Khoom Siv Xuab Zeb Zirconia Tshiab
Thaum nws los txog rau cov ntaub ntawv siv hauv kev lag luam, ntau tus neeg tsis paub yuav pom tias cov ncauj lus no tsis lom zem, tab sis qhov tseeb muaj ntau yam nyuaj rau nws.zirconia, piv txwv li. Yav dhau los, tib neeg tsuas xav tias nws tsuas yog siv rau cov khoom xws li riam ceramic thiab cov hniav cuav, ib yam dab tsi tawv thiab ci ntsa iab. Tab sis rau cov neeg uas koom nrog kev tshawb fawb thiab kev txhim kho cov ntaub ntawv thiab kev siv hauv kev lag luam, nws yog ib qho khoom muaj nqis heev. Cov khoom siv xuab zeb zirconia tshiab uas tau tshwm sim hauv xyoo tas los no, tshwj xeeb, tau daws cov teeb meem tseem ceeb thiab muab cov kev cia siab zoo kawg nkaus.
Kuv nco qab tias kuv tau mus koom ib lub rooj sib tham txog kev lag luam ob xyoos dhau los thiab tau tham nrog ib tug kws ua vaj tse uas tau ua haujlwm hauv cov khoom siv refractory tau ntau xyoo. Nws ntaus nws lub duav thiab hais tias, "Auj, kwv tij, koj tsis nkag siab! Kev lag luam smelting tam sim no muab cov khoom siv xav tau ntau heev! Kub nce siab zuj zus, thiab ib puag ncig tab tom ua rau hnyav zuj zus. Cov khoom siv ib txwm tsis tuaj yeem ua tau. Piv txwv li, zirconia. Txhua tus paub tias nws zoo heev - tiv taus kub siab thiab ruaj khov. Tab sis xuab zeb zirconia tsim los ntawm kev siv cov txheej txheem ib txwm muaj tsis muaj kev huv, tsis sib xws ntawm cov khoom me me, lossis tsis ruaj khov. Nws kuj kim heev, ua rau nws nyuaj rau siv. Feem ntau, nws zoo li 'lub siab nyiam nyob ntawd, lub peev xwm tsis nyob ntawd.'"
Nws ua tiav qhov no lawm. Qhov no yog lub hom phiaj tseem ceeb ntawm peb txoj kev tshawb fawb thiab kev txhim kho zirconia xuab zeb tshiab - puas yog nws los kov yeej cov teeb meem qub no?
Yog li ntawd, kev tsim kho tshiab nyob qhov twg tiag? Cia kuv piav qhia.
Ua ntej, "lub hauv paus" yuav tsum hloov. zirconia yav dhau los muaj teeb meem: nws cov qauv siv lead ua tsis ruaj khov. Thaum qhov kub hloov pauv, nws tuaj yeem "sib ntaus" sab hauv, tsim cov kab nrib pleb me me. Dhau sijhawm, kev ua tau zoo poob qis. Peb txoj hauv kev tshiab suav nrog kev kho dua tshiab hauv kev tsim thiab kev ua tiav. Los ntawm kev qhia txog cov stabilizers siab dua, xws li yttrium, ua ke nrog kev sintering kub siab heev thiab cov txheej txheem crushing thiab kev faib tawm ntau dua, peb tau ua tiav cov khoom zoo kawg no: "zirconia ruaj khov ib nrab." Hais lwm txoj hauv kev, nws zoo li tsim "txuj ci hlau" hauv cov khoom zirconia, xyuas kom meej tias lawv nyuaj thaum xav tau thiab ductile thaum xav tau, tsis zoo li cov khoom tawg yooj yim ntawm yav dhau los. Ntxiv mus, kev dawb huv yog nce ntxiv, nrog rau qib impurity khaws cia rau qib qis heev.
Qhov thib ob, yuav tsum tau them sai sai rau qhov tsos thiab cov duab. Cov xuab zeb zirconia tshiab muab qhov tseem ceeb rau qhov tsos - tsis yog rau kev sib tw zoo nkauj xwb, tab sis hais txog cov qauv ntawm cov khoom me me thiab kev faib tawm qhov loj me. Cov khoom me me uas tsis sib npaug, qhov loj me tsis sib xws, "coarse" yog qhov puas tsuaj rau kev siv precision. Tam sim no, los ntawm cov txheej txheem zoo li air jet milling thiab centrifugal classification, peb tuaj yeem tsim cov hmoov zirconia micropowders ze li ntawm spherical nrog cov khoom me me sib xws heev. Coj ib txhais tes thiab nws zoo li hmoov zoo tshaj plaws, tab sis nws qhov nyuaj yog siab heev. Qhov kev sib xws no muab cov txiaj ntsig zoo heev: txawm tias siv ua txheej lossis abrasive, cov txiaj ntsig ruaj khov thiab sib xws, tsis muaj kev siv tsis sib xws.
Kev hais lus loj tsis muaj txiaj ntsig; kev txhim kho yuav tsum tau siv rau hauv kev ua tau zoo. Cov kev tsim kho tshiab nocov xuab zeb zirconiatam sim no tau nrhiav ntau heev hauv ntau qhov chaw siab.
Ua ntej tshaj plaws, kev ua kom raug yog qhov tseem ceeb heev, tshwj xeeb tshaj yog rau cov khoom siv superalloy uas muaj phab ntsa nyias, xws li cov hniav dav hlau thiab cov hniav roj turbine. Qhov kub ntawm kev ua kom raug ncav cuag ntau dua 1,000 degrees Celsius, ua rau muaj kev thov siab heev rau cov khoom siv pwm. Cov txheej txheem saum toj kawg nkaus ua los ntawm cov xuab zeb zirconia tshiab no muaj kev ruaj khov zoo heev thiab cov coefficient thermal expansion sib xws. Qhov no ua rau qhov tiav ntawm qhov chaw ua kom tiav zoo dua, ua rau cov qhov tsis zoo xws li xuab zeb khaws thiab burrs tsis pom, txo cov nqi ntawm kev ua tiav tom qab. Cov kws ua haujlwm txawj ntse hais tias, "Siv cov xuab zeb tshiab no, txoj haujlwm zoo kawg nkaus!"
Lwm daim ntawv thov yog qib siabsib tsoo thiab polishingPeb lub xov tooj ntawm tes iav, lub koob yees duab lens, thiab ntau yam semiconductor wafers xav tau cov nplaim du heev; txawm tias qhov khawb me me yuav ua rau khawb. Tshiab zirconium oxide micropowder, nrog nws qhov nyuaj siab, qhov loj me me, thiab cov khoom siv tshuaj lom neeg thiab kho tshuab zoo heev, yog cov kua polishing zoo heev. Tus nqi tshem tawm raug tswj hwm meej, thiab kev tiv thaiv khawb tsawg heev, ua tiav qhov nplaim du tiag tiag ntawm nanoscale lossis txawm tias atomic theem. Hais yooj yim, koj lub xov tooj screen zoo li du heev ua tsaug rau nws.
Kuj tseem muaj cov txheej txheej tiv thaiv cua sov. Cov cav aerospace thiab cov turbines roj yuav ua li cas thiaj li tiv taus qhov kub thiab txias heev no? Cov khoom tseem ceeb yog txau nrog "lub tsho tiv thaiv cua sov." Ib qho ntawm cov khoom siv tseem ceeb siv hauv lub tsho no yog zirconium oxide-based ceramics. Cov xuab zeb zirconium oxide tshiab, nrog nws qhov kev tiv taus kub siab thiab kev ruaj khov theem, yog cov khoom siv tseem ceeb rau kev npaj cov hmoov txheej saum toj kawg nkaus no, uas muaj feem cuam tshuam ncaj qha rau kev ua haujlwm ntawm lub cav thiab lub neej ntev.
Tsis tas li ntawd xwb, nws kuj tseem pom muaj nyob rau hauv cov khoom siv ua los ntawm cov av nplaum uas siv rau tej qhov chaw nyuaj, cov khoom siv uas siv hluav taws xob ntau heev, thiab txawm tias cov khoom siv kho mob. Nws cov kev siv kuj tab tom nthuav dav zuj zus.
Yav tom ntej, kuv ntseeg tias txoj kev rau cov xuab zeb zirconia tshiab yuav dav dua. Nrog rau kev nce qib sai hauv kev lag luam xws li photovoltaics, semiconductor chips, thiab aerospace, qhov kev xav tau kev ua tau zoo rau cov ntaub ntawv tsuas yog yuav dhau los ua qhov xav tau ntau dua. Cov khoom xuab zeb Zirconia nrog cov khoom huv dua, zoo dua, sib xws dua, thiab kev ua tau zoo dua yuav raug tsim kho. Tej zaum muaj ib hnub, nws yuav ci ntsa iab hauv thaj chaw uas peb tsis tuaj yeem xav txog tam sim no.
Yog li ntawd, tsis txhob saib tsis taus cov xuab zeb me me no. Lawv muaj kev txawj ntse loj heev thiab tuaj yeem muaj zog rau cov lag luam loj. Qhov tseem ceeb ntawm kev tsim kho tshiab yog nyob rau hauv kev tso tawm tag nrho lub peev xwm ntawm cov khoom siv los ua kom tau raws li qhov xav tau ntawm peb lub sijhawm.