Aluminium titanium carbide, Ti3AlC2

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Aluminium titanium carbide, Ti3AlC2

Titanium-aluminium carbide (TI-Al carbide) yog hom tshiab ntawm peb-txheej qauv ceramic khoom, uas tau txhawj xeeb los ntawm cov ntaub ntawv tshawb fawb thiab tus kws tshaj lij vim nws cov khoom tshwj xeeb.


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Titanium-aluminium carbide (TI-Al carbide) yog hom tshiab ntawm peb-txheej qauv ceramic khoom, uas tau txhawj xeeb los ntawm cov ntaub ntawv tshawb fawb thiab tus kws tshaj lij vim nws cov khoom tshwj xeeb.
Titanium aluminium carbide (Ti3AlC2) belongs rau hexagonal crystal system, thiab muaj cov yam ntxwv ntawm cov hlau thiab ceramics: nws muaj tib lub conductivity thiab tshav conduction li hlau, tab sis kuj muaj tib lub siab elastic modulus thiab zoo heev kub-kub kho tshuab zog xws li ceramic , nrog cov zoo conductivity thiab kub conduction muaj peev xwm, siab elastic modulus thiab tsis Vickers hardness, thiab zoo puas kuj muaj peev xwm. Nws tuaj yeem ua tshuab hauv chav tsev kub thiab tsim cov yas deformation ntawm kub. Nws kuj muaj qhov kub zoo ua hauj thiab qhov ruaj khov oxidation. Nws kuj muaj zoo thermal poob siab tsis kam, tiv thaiv kev puas tsuaj thiab zoo tshuaj corrosion kuj.
MAX theem ceramics (suav nrog Ti3SiC2, Ti3AlC2, thiab lwm yam) yog hom tshiab ntawm cov khoom siv ua muaj plooj hluavtaws. Cov ceramics no muaj ntau tshaj li rau caum ternary carbides los yog nitrides. M sawv rau pem hauv ntej hlau caij ntawm kev hloov pab pawg; A sawv cev ntawm cov pab pawg tseem ceeb, feem ntau yog cov ua ntawm pawg peb thiab pawg thib plaub; X yog rau cov pa roj carbon lossis nitrogen.

Ti3SiC2 yog qhov muaj kev kawm ntau tshaj plaws. Ti3SiC2 tau ntse ua tiav los ntawm kub nias hauv 1996 los ntawm cov xibfwb Barsoum M ntawm Drexel University hauv Tebchaws Meskas thiab nws cov haujlwm zoo heev tau pom. Vim nws qhov tshwj xeeb nanometer fawm kib siv lead ua qauv, cov khoom siv zoo li no muaj cov khoom xws li oxidation tsis kam, nws tus kheej lubrication, lub siab tawv ntawm chav tsev kub thiab kev coj ua. Cov khoom zoo li no tuaj yeem siv dav raws li cov txheej txheem kub kub, cov khoom siv txhuam hluav taws xob, cov khoom siv tshuaj tua kab mob thiab ua kom kub lub zog kub. Cov khoom lag luam yog siv rau kev kub txheej txheej, MXene ua ntej, kev coj tus kheej lubricating ceramics, lithium ion roj teeb, supercapacitors, electrochemical catalysis.
Kev tsis ntawm Ti3AlC2:

yam parameter
 tshuab

cov cuab yeej

lub zog compressive (MPa) 764
dabtsi yog khoov zog (MPa) 375 ± 15
rhuav lub peev xwm (MPa ?? m1 / 2) 7.2
Vickers hardness (GPa) 3.5
Modulus hluas (GPa) 297
hluav taws xobcov cuab yeej Ib qho conductivity × S 106S ?? m ﹣ 1) 2.9 (25 ℃)
0.85 (800))
qhov kub txias coefficient ntawm kev tiv taus (﹣ 10﹣3K ﹣ 1) 3.1
tshav kublub zog coefficient ntawm thermal expansionthermal expansivity

× ﹣ 10﹣6K ﹣ 1)

9.0
tshav kub muaj peev xwm (J ?? mol ﹣ 1 ?? K ﹣ 1) -
Thaum tshav kub kub conductivity (W ?? m ﹣ 1 ?? K ﹣ 1) -
thermal poob siab tsis kam Nplua
siab kub stability Nplua

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