High-entropy alloys yog dab tsi?

Cov ntaub ntawv yooj yim

High-entropy alloys (HEAs) yog cov alloys uas tau tsim los ntawm kev sib xyaw ua ke los yog sib npaug loj ntawm (feem ntau) tsib lossis ntau lub ntsiab lus. Ua ntej kev sib txuas ntawm cov tshuaj no, cov hlau alloys raug suav nrog ib lossis ob lub ntsiab lus tseem ceeb nrog cov nqi me me ntawm lwm cov ntsiab lus.

Piv txwv li, cov ntsiab lus ntxiv tuaj yeem muab ntxiv rau hlau los txhim kho nws cov khoom, yog li tsim cov hlau-raws li alloy, tab sis feem ntau nyob rau hauv qis proportions, xws li cov proportions ntawm carbon, manganese, thiab lwm yam nyob rau hauv ntau yam steels. Yog li ntawd, high-entropy alloys yog ib chav kawm tshiab ntawm cov ntaub ntawv.

Lub sij hawm "high-entropy alloys" tau coined vim hais tias qhov entropy nce ntawm kev sib xyaw yog ntau dua thaum muaj ntau cov ntsiab lus nyob rau hauv qhov sib tov, thiab lawv cov proportions yog ze li ntawm sib npaug.

Adaim ntawv thov Prospect

Daim ntawv thov kev cia siab ntawm siab entropy alloys yog dav heev, uas yog vim lawv cov cim tshwj xeeb ntawm lub cev thiab tshuaj lom neeg. Nov yog qee qhov kev siv hauv thaj chaw tshwj xeeb:

1.Aerospace: Vim lawv lub zog siab, siab hardness, siab hnav tsis kam thiab kub stability, high-entropy alloys yog zoo heev nyob rau hauv kev tsim cov foob pob ua ntxaij cav, satellite Cheebtsam thiab aircraft structural Cheebtsam uas yuav tsum tau mus ua hauj lwm nyob rau hauv high kub thiab lwm yam huab cua. ib puag ncig. Tsis tas li ntawd, high-entropy alloys kuj tseem siv tau rau hauv cov khoom tseem ceeb ntawm cov tsheb hypersonic thiab hauv thaj chaw xws li aeroengine turbine hniav.

2.Automotive kev lag luam: Qhov cuam tshuam tsis kam thiab corrosion kuj ntawm high entropy alloys ua rau lawv zoo tshaj plaws rau automotive engine, kis tau tus mob, chassis thiab lub cev Cheebtsam Figured. Cov yam ntxwv no ua rau muaj kev ruaj ntseg thiab kev nyab xeeb ntawm lub tsheb.

3.Electronics kev lag luam: Vim muaj cov yam ntxwv ntawm cov hluav taws xob conductivity, siab thermal conductivity thiab siab electromagnetic shielding zog, siab entropy alloys muaj ntau yam kev siv nyob rau hauv kev tsim khoom ntawm hluav taws xob Cheebtsam, integrated circuits thiab solar cells. Qhov no yuav pab txhawb kev txhim kho kev ua tau zoo thiab miniaturization qauv ntawm cov khoom siv hluav taws xob.

4.Nuclear zog thiab lwm yam kev siv tub rog: Ntxiv rau cov ntawv thov saum toj no, cov khoom siv siab entropy kuj tseem tuaj yeem siv rau hauv kev tiv thaiv me me ntawm cov kob nuclear, txheej txheej ntawm cov hlau thiab lwm yam kev siv tub rog lossis nuclear zog. Qhov no qhia tau hais tias qhov dav siv tau ntawm high entropy alloys hauv ntau qhov chaw tshwj xeeb thiab cov kev xav tau.

5.Structural Mechanics thiab zog hloov dua siab tshiab thiab cia: siab entropy alloys yuav tsum tau ua lub luag hauj lwm tseem ceeb nyob rau hauv lub tshav pob ntawm structural mechanics vim lawv zoo heev mechanical zog. Nyob rau tib lub sijhawm, nws qhov peev xwm thov tus nqi hauv kev hloov pauv hluav taws xob thiab kev cia khoom kuj tsim nyog rau kev mloog thiab kev tshawb fawb

Tshawb xyuas.

6. Cov khoom siv kho mob: Lub biocompatibility thiab corrosion kuj ntawm high-entropy alloys muab rau lawv muaj peev xwm siv nyob rau hauv cov kev kho mob cov cuab yeej, xws li kev cog hniav, orthopedic pab kiag li lawm, thiab lwm yam khoom siv kho mob uas yuav tsum tau implantation mus sij hawm ntev nyob rau hauv tib neeg lub cev. Feem ntau, nrog kev txhim kho txuas ntxiv thiab kev vam meej ntawm kev tshawb fawb thiab thev naus laus zis thiab kev xav tau ntau ntxiv rau cov ntaub ntawv tshiab, nws tuaj yeem kwv yees tias kev tshawb fawb thiab kev txhim kho ntau ntxiv ntawm kev siv high-entropy alloys yuav tshwm sim yav tom ntej.