Magnesium Scandium Alloy

Scandium, raws li kev hloov pauv tsis tshua muaj lub ntiaj teb, muaj qhov ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom ntom. Nws muaj kev ua tau zoo hauv kev ua haujlwm ntawm cov hlau, tshwj xeeb tshaj yog nyob rau hauv kev lag luam ntawm aluminium alloy, uas tuaj yeem txhim kho cov txiaj ntsig zoo, kev ua haujlwm vuam thiab corrosion kuj ntawm aluminium alloy. Nws yog cov khoom siv hlau nrog qhov zoo tshaj plaws ntxiv dag zog rau hauv aluminium alloy. Nyob rau tib lub sijhawm, cov khoom siv scandium tseem tuaj yeem ua lub luag haujlwm tseem ceeb hauv kev txhim kho cov khoom ntawm Al-Cu alloy, Al-Mg alloy, Al-Zr alloy, Al-Zn alloy thiab lwm yam ntaub ntawv.

Nco tseg: Mg-Sc alloy nrog Sc cov ntsiab lus tsawg dua 50 feem pua ​​tuaj yeem kho raws li cov neeg siv khoom xav tau.

Ntim
Ntim hauv thawv los yog hlau nruas

Ntau lawm
Hunan Oriental Scandium muaj nws tus kheej kom zoo dua ntawm cov peev txheej scandium. Cov khoom siv scandium los ntawm cov kua qaub pov tseg ntawm titanium dioxide hauv peb pab pawg, LB pawg, uas yog lub ntiaj teb thib 3 cov chaw tsim khoom loj tshaj plaws ntawm kev ua haujlwm siab titanium dioxide pigments thiab 1st hauv Asia raws li TiO2 pigment muaj peev xwm.

Raws li cov chaw tsim khoom tshwj xeeb hauv kev lag luam scandium rau ntau tshaj 10 xyoo, Hunan Oriental Scandium tau cog lus los txhawb kev lag luam thoob ntiaj teb scandium thiab tsim Magnesium Scandium Alloy nrog cov khoom ruaj khov thiab tus nqi pheej yig, uas ua rau kev lag luam loj hauv daim ntawv thov.

Daim ntawv thov
Tohoku University, Nyiv, tshaj tawm tias qhov kev tshawb pom tshiab magnesium-scandium alloy nrog cov qauv bcc qhia txog kev hloov pauv martensitic thiab nthuav tawm cov nyhuv superelastic ntawm −150 degree (−238 degree F). Mg-20Sc alloy tau lees paub tias muaj cov kab mob superelastic ntau dua 4 feem pua, thiab qhia txog 6 feem pua ​​​​txoj kev rov qab tau (xws li ob qho tib si elastic thiab superelastic hom). Daim duab qhia txog kev ntxhov siab-txheej nkhaus ntawm Mg-Sc alloy daim ntawv ntawm −150 degree (−238 degree F). Daim ntawv qauv tau thauj khoom hauv qhov nro mus txog 3 feem pua ​​​​thiab tom qab ntawd tshem tawm. Daim ntawv alloy qhia tau hais tias muaj cov nyhuv superelastic.

Tsis tas li ntawd, ib qho kev nco zoo tau pom. Pab pawg tau pom tias qhov kev ua haujlwm kub ntawm Mg-Sc zoo-nco alloy tuaj yeem sib txawv los ntawm kev tswj cov ntsiab lus scandium, thiab paub tseeb tias Mg-Sc alloy nrog 18.3 ntawm feem pua ​​​​scandium pom cov duab rov qab thaum cua sov ntawm −30 degree (−22 degree. F) rau chav tsev kub. Mg-Sc SMA muaj qhov ntom ntawm li 2 g / cm3, uas yog ib feem peb tsawg dua li TiNi SMAs.

Cov kws tshawb fawb ntseeg tias qhov no tuaj yeem cuam tshuam loj rau kev lag luam aerospace. Qhov sib zog ntawm cov khoom, cov roj ntau dua cov foob pob hluav taws thiab lub dav hlau. Yog li no lub teeb yuag magnesium-raws li SMA muaj peev xwm zoo hauv kev siv aerospace xws li tus kheej-deployable qhov chaw nyob thav ntawv thiab damping li ntawm spacecraft systems.

Ntxiv mus, magnesium-based SMAs kuj tuaj yeem siv rau hauv kev kho mob. Tam sim no, TiNi superelastic alloys tau siv los ua tus kheej-expandable stents nrog kev vam meej. Txawm li cas los xij, muaj teeb meem ntawm in-stent restenosis. Txhawm rau kov yeej qhov restenosis, biodegradable magnesium alloy stents tsis ntev los no tau thov. Qhov no txhais tau hais tias Mg-Sc superelastic alloy tuaj yeem siv rau hauv biodegradable self-expanding stents.

Cov kws tshawb fawb tau cia siab tias yav tom ntej, cov alloy muaj pes tsawg leeg yuav ua kom zoo dua rau kev ua haujlwm kub, thiab biocompatibility thiab biodegradable yam ntxwv ntawm cov txheej txheem alloy tam sim no yuav raug soj ntsuam.