Dab tsi yog Cov Khoom Siv Lub Cev Thiab Kev Siv Nickel-titanium Superelastic Memory Alloys?

1, cov yam ntxwv ntawm lub cim xeeb (zoo li lub cim xeeb) lub cim xeeb yog thaum muaj qee yam duab ntawm niam txiv theem los ntawm Af kub siab tshaj qhov txias rau Mf kub hauv qab qhov tsim ntawm martensite, lub martensite yuav qis dua Mf kub deformation, los ntawm cua sov rau lub Tom qab qhov kub thiab txias hauv qab no, nrog rau qhov hloov pauv hloov pauv, cov khoom siv yuav cia li rov qab kho nws cov duab hauv niam txiv theem thaum cov duab. Nyob rau hauv qhov tseeb, cov duab nco nyhuv yog ib tug tshav kub-induced theem kev hloov nyob rau hauv Ni-Ti alloys.

2, Superelastic Lub npe hu ua superelasticity yog hais txog qhov tshwm sim uas cov qauv tsim los ntawm cov qauv nyob rau hauv qhov kev txiav txim ntawm sab nraud quab yuam yog loj dua li cov kev txwv ntawm elasticity, thiab cov strain tuaj yeem rov qab tau thaum tshem tawm. Ntawd yog, nyob rau hauv niam txiv theem lub xeev, vim yog lub luag haujlwm ntawm kev siv kev ntxhov siab, ua rau muaj kev ntxhov siab vim kev hloov pauv ntawm martensitic theem tshwm sim, yog li ntawd cov alloy qhia tau hais tias cov khoom siv sib txawv ntawm cov khoom siv zoo tib yam, nws cov kev txwv tsis pub muaj ntau dua li qhov qub. cov ntaub ntawv, thiab tsis ua raws li Hooke txoj cai.

Nyob rau hauv sib piv rau lub cim xeeb zog, hyperelasticity tsis muaj thermal kev koom tes. Txhawm rau kom ua tiav, hyperelasticity yog hais txog qhov tseeb tias kev ntxhov siab tsis nce ntxiv nrog kev nyuaj siab nyob rau hauv qee yam ntawm deformation, thiab tuaj yeem muab faib ua ob pawg: linear hyperelasticity thiab nonlinear hyperelasticity. Nyob rau hauv lub qub, kev ntxhov siab thiab kev nyuaj siab nyob rau hauv txoj kev nyuaj siab-strain nkhaus yog ze rau ib tug linear kev sib raug zoo. Nonlinear hyperelasticity yog hais txog qhov tshwm sim ntawm kev ntxhov siab vim kev hloov pauv martensitic theem thiab nws qhov hloov pauv hloov pauv thaum lub sijhawm thauj khoom thiab tshem tawm hauv qee qhov kub ntawm lub sijhawm saum toj no Af, yog li nonlinear hyperelasticity tseem hu ua theem hloov pauv pseudoelasticity.

Cov theem hloov pseudoelasticity ntawm Ni-Ti alloys tuaj yeem ncav cuag li 8%. Lub superelasticity ntawm Ni-Ti alloy tuaj yeem hloov pauv nrog kev hloov pauv ntawm cov xwm txheej ntawm kev kho cua sov, thiab cov superelasticity pib txo thaum lub archwire yog rhuab mus rau ntau tshaj 400oC.

3, intraoral kub hloov rhiab heev: lub orthodontic quab yuam ntawm stainless hlau hlau thiab CoCr alloy hniav orthopedic hlau yog yeej tsis cuam tshuam los ntawm intraoral kub. Lub orthodontic quab yuam ntawm superelastic Ni-Ti alloy hniav orthopedic hlau hloov nrog kev hloov ntawm qhov ncauj kub.
Thaum tus nqi ntawm deformation yog tseeb. Thaum qhov kub nce, lub zog orthodontic nce. Ntawm qhov tod tes, nws ua kom nrawm nrawm ntawm cov hniav, uas yog vim qhov kub hloov pauv hauv qhov ncauj kab noj hniav txhawb nqa cov ntshav ntws hauv qhov chaw tsis txaus ntseeg ntawm cov ntshav ntws los ntawm capillary stagnation vim yog cov khoom siv orthodontic, uas ua rau cov hlwb rov qab los. tau txais kev noj zaub mov txaus los tswj lawv qhov tseem ceeb thiab kev ua haujlwm zoo hauv cov txheej txheem ntawm cov hniav. Ntawm qhov tod tes, tus kws kho hniav tsis tuaj yeem tswj xyuas lossis ntsuas lub zog orthodontic hauv qhov ncauj ib puag ncig.

4, corrosion kuj: qee qhov kev tshawb fawb tau pom tias qhov corrosion kuj ntawm nickel titanium hlau zoo ib yam li stainless hlau hlau.

5, anti-toxicity: npib tsib xee-titanium zoo nco alloy tshwj xeeb tshuaj muaj pes tsawg leeg, uas yog, qhov no yog ib tug npib tsib xee-titanium isoatomic alloy, muaj li ntawm 50% npib tsib xee, thiab npib tsib xee paub tias muaj carcinogenic thiab mob qog noj ntshav-txhawb cov teebmeem. Feem ntau, txheej txheej ntawm titanium oxide ua raws li qhov thaiv kom ua rau Ni-Ti alloy biocompatible.

Cov txheej txheej saum npoo TiXOy thiab TixNiOy inhibit qhov tso tawm Ni.

6, Mos orthodontic quab yuam: Tam sim no kev lag luam siv orthodontic hlau xaim muaj xws li austenitic stainless hlau xaim, cobalt-chromium-nickel alloy hlau, nickel-chromium alloy xov hlau, Australian alloy xov hlau, thiab titanium alloy hlau. Hais txog lub load-tsav curves ntawm no orthodontic kho hlau hlau nyob rau hauv tensile xeem thiab peb-point dabtsi yog khoov kuaj tej yam kev mob.

Nickel-titanium alloy muaj qhov qis tshaj plaws thiab flattest unloading nkhaus toj siab, qhia tias nws yog qhov muaj peev xwm tshaj plaws ntawm kev muab lub zog ntev thiab maj mam orthodontic.

7, zoo vibration damping yam ntxwv: vim zom thiab sib tsoo cov hniav rau archwire tshwm sim los ntawm qhov ntau dua qhov kev co, qhov ntau dua qhov kev puas tsuaj rau cov hauv paus hniav thiab cov ntaub so ntswg. Los ntawm cov txiaj ntsig ntawm kev sib txawv archwire attenuation thwmsim, nws pom tau hais tias qhov kev vibration amplitude ntawm stainless hlau hlau yog loj dua li ntawm super-elastic npib tsib xee titanium hlau, thiab qhov pib vibration amplitude ntawm super-elastic npib tsib xee titanium archwire tsuas yog ib nrab ntawm cov khoom ntawm cov hlau. stainless hlau hlau. Kev co zoo thiab kev poob siab absorbing yam ntxwv ntawm archwire tseem ceeb heev rau kev noj qab haus huv ntawm cov hniav, whereas ib txwm archwires xws li stainless hlau hlau muaj ib tug nyiam exacerbate lub resorption ntawm lub hauv paus ntawm cov hniav.