Taw qhia
titanium thiab hlau puas tuaj yeem sib xyaw? Nws yog lo lus nug uas tau ua rau ntau tus neeg xav tsis thoob, tshwj xeeb tshaj yog cov neeg nyob hauv metallurgy thiab engineering. Titanium thiab hlau yog ob qho khoom siv dav siv hlau, nrog rau lawv cov khoom tshwj xeeb thiab kev siv. Tab sis yuav ua li cas tshwm sim thaum ob hlau no sib xyaw ua ke? Hauv tsab xov xwm no, peb yuav tshawb xyuas cov khoom ntawm titanium thiab hlau, thiab sib tham txog cov txiaj ntsig zoo thiab qhov tsis zoo ntawm kev sib xyaw ua ke.
Cov khoom ntawm Titanium
Titanium yog cov khoom siv tshuaj lom neeg nrog lub cim Ti thiab atomic naj npawb 22. Nws yog cov hlau nplaum, muaj zog, tsis tshua muaj ntom ntom uas tiv taus corrosion. Nws tshwj xeeb ua ke ntawm lub zog, qis ntom ntom, thiab corrosion kuj ua rau nws yog cov khoom siv zoo tagnrho rau ntau cov ntawv thov, suav nrog cov tshuaj, tshuaj, thiab khoom siv kis las.
Ib qho ntawm cov khoom tseem ceeb ntawm titanium yog nws lub zog-rau-qhov hnyav piv. Nws yog ib qho ntawm cov hlau uas muaj zog tshaj plaws thiab lightest muaj, ua rau nws yog ib qho kev xaiv nrov rau kev lag luam aerospace. Titanium kuj tseem tiv taus corrosion, tshwj xeeb tshaj yog thaum nyob rau hauv kev sib cuag nrog seawater los yog acidic ib puag ncig.
Lwm yam khoom tseem ceeb ntawm titanium yog nws biocompatibility. Qhov no txhais tau tias nws tsis muaj tshuaj lom thiab tsis hnov tsw ntawm tib neeg lub cev. Qhov no ua rau nws yog ib qho zoo tagnrho hlau rau kev cog hniav kho mob, xws li kev sib koom tes hloov thiab kev cog hniav.
Cov cuab yeej ntawm Hlau
Hlau yog cov khoom siv tshuaj lom neeg nrog lub cim Fe thiab atomic tooj 26. Nws yog cov hlau ntom ntom, malleable, ductile hlau uas tau siv dav hauv kev tsim kho, kev thauj mus los, thiab kev tsim khoom. Hlau yog siv dav tshaj plaws ntawm tag nrho cov hlau thiab yog ib qho tseem ceeb rau lub neej.
Ib qho ntawm cov khoom tseem ceeb ntawm cov hlau yog nws cov magnetic susceptibility. Nws yog cov hlau nplaum heev thiab siv ntau yam kev siv, suav nrog cov tshuab hluav taws xob thiab cov tshuab hluav taws xob. Hlau kuj yog cov conductive heev, ua rau nws zoo tagnrho cov khoom siv hluav taws xob.
Hlau kuj yog heev reactive thiab yog nquag rusting nyob rau hauv lub xub ntiag ntawm noo noo thiab oxygen. Qhov no tuaj yeem ua rau muaj teeb meem hauv cov ntawv thov uas qhov kev tiv thaiv corrosion tseem ceeb.
Kev sib xyaw titanium thiab hlau
Muab cov khoom tshwj xeeb ntawm ob qho tib si titanium thiab hlau, nws yuav zoo li qhov kev xaiv pom tseeb los sib xyaw ua ke los tsim cov hlau super nrog qhov zoo tshaj plaws ntawm ob lub ntiaj teb. Txawm li cas los xij, muaj ntau qhov kev sib tw uas cuam tshuam nrog kev sib xyaw ob cov hlau no.
Ib qho ntawm cov teeb meem tseem ceeb yog qhov sib txawv ntawm cov ntsiab lus melting ntawm ob lub hlau. Titanium muaj ib tug melting point ntawm 1668 degree, thaum hlau muaj ib tug melting point ntawm 1538 degree. Qhov no txhais tau hais tias thaum kub kub, ob lub hlau yuav yaj ntawm cov nqi sib txawv thiab tej zaum yuav tsis ua ke zoo.
Lwm qhov kev sib tw yog qhov sib txawv ntawm cov qauv atomic ntawm ob lub hlau. Titanium muaj hexagonal close-packed (HCP) siv lead ua qauv, thaum hlau muaj lub cev-centered cubic (BCC) siv lead ua qauv. Cov kev sib txawv no tuaj yeem ua rau muaj qhov tsis xws luag thiab cov yam ntxwv tsis muaj zog hauv cov txiaj ntsig alloy.
Txawm hais tias muaj kev sib tw no, muaj ntau qhov kev sim sib xyaw titanium thiab hlau los tsim cov hlau tshiab. Ib txoj hauv kev yog siv cov txheej txheem hu ua reactive sintering, qhov twg ob lub hlau sib xyaw ua ke hauv cov hmoov hmoov thiab tom qab ntawd ua kom sov hauv siab los tsim cov khoom siv hlau. Lwm txoj hauv kev yog siv cov txheej txheem hu ua diffusion bonding, qhov twg ob lub hlau yog rhuab thiab nias ua ke los tsim ib daim ntawv cog lus.
Cov txiaj ntsig ntawm kev sib xyaw titanium thiab hlau
Thaum muaj kev sib tw nrog kev sib xyaw titanium thiab hlau, kuj tseem muaj cov txiaj ntsig zoo uas ua rau nws tsim nyog tshawb nrhiav. Ib qho ntawm cov txiaj ntsig tseem ceeb yog qhov muaj peev xwm txhim kho lub zog thiab corrosion kuj. Titanium twb muaj zog heev rau corrosion, tab sis nws nrog hlau yuav tsim ib tug alloy uas yog ntau resistant rau corrosion nyob rau hauv ib puag ncig hnyav.
Lwm qhov txiaj ntsig zoo yog lub peev xwm los txo tus nqi ntawm kev siv titanium. Titanium yog cov hlau kim, thiab nrhiav txoj hauv kev los txo tus nqi ntawm kev siv nws tuaj yeem ua rau nws yooj yim dua rau kev siv ntau yam. Sib tov nws nrog hlau yuav yog ib txoj hauv kev los tsim ib qho kev pheej yig dua rau cov ntshiab titanium.
Kev sib xyaw titanium thiab hlau kuj tseem tuaj yeem qhib cov ntawv thov tshiab rau cov alloys. Piv txwv li, ib tug alloy ntawm titanium thiab hlau yuav siv tau nyob rau hauv kev tsim kho ntawm cov choj los yog lwm yam infrastructure tej yaam num uas muaj zog thiab corrosion kuj tseem ceeb heev. Nws kuj tseem tuaj yeem siv rau hauv kev tsim cov khoom siv kis las lossis lwm yam khoom siv uas yuav tsum tau siv cov hlau sib zog, ntau dua.
Drawbacks ntawm Mixing Titanium thiab Hlau
Thaum muaj cov txiaj ntsig zoo rau kev sib xyaw titanium thiab hlau, kuj tseem muaj ob peb qhov tsis zoo uas yuav tsum tau xav txog. Ib qho ntawm cov teeb meem tseem ceeb yog qhov muaj peev xwm rau kev ua haujlwm tsis muaj zog hauv qhov tshwm sim alloy. Raws li tau hais ua ntej, cov qauv atomic ntawm titanium thiab hlau sib txawv, uas tuaj yeem ua rau muaj qhov tsis zoo thiab tsis muaj zog ntawm cov hlau.
Lwm qhov tsis zoo yog qhov muaj peev xwm rau galvanic corrosion. Galvanic corrosion tshwm sim thaum ob cov hlau sib txawv nyob rau hauv kev sib cuag thiab raug rau ib qho electrolyte, xws li dej ntsev. Qhov no tuaj yeem ua rau corrosion sai ntawm ib qho ntawm cov hlau thiab tuaj yeem cuam tshuam cov qauv kev ncaj ncees ntawm cov hlau.
Thaum kawg, muaj peev xwm txo qis biocompatibility. Thaum titanium yog biocompatible heev, nws sib xyaw nrog hlau tuaj yeem ua rau cov hlau tsis sib xws nrog tib neeg lub cev. Qhov no tuaj yeem txwv tsis pub siv cov alloy hauv kev siv kho mob, xws li kev sib koom ua ke los yog kev cog hniav.
Xaus
Hauv kev xaus, cov lus nug ntawm seb titanium thiab hlau puas tuaj yeem sib xyaw yog ib qho nyuaj. Txawm hais tias muaj teeb meem cuam tshuam nrog kev sib xyaw ntawm ob cov hlau no, kuj tseem muaj cov txiaj ntsig zoo uas ua rau nws tsim nyog tshawb nrhiav. Los ntawm kev ua tib zoo xav txog cov khoom ntawm txhua cov hlau thiab qhov muaj peev xwm tsis zoo ntawm kev sib xyaw ua ke, peb tuaj yeem pib nkag siab txog cov peev txheej thiab cov kev txwv ntawm titanium-hlau alloys. Raws li thev naus laus zis nce qib thiab cov ntaub ntawv tshiab tau tsim, nws muaj peev xwm hais tias peb yuav muaj ib hnub pom cov alloys tshiab uas ua ke cov khoom zoo tshaj plaws ntawm ob qho tib si hlau.