Silicon Titanium Carbide, Ti3SiC2

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Silicon Titanium Carbide, Ti3SiC2

Xyoo tsis ntev los no, cov ntaub ntawv tus kws tshawb fawb tau tsim cov chav kawm tshiab ntawm 312 hom cov khoom siv ceramic, cov qauv mis rau M3XZ2, ntawm lawv, M yog ib lossis ob peb ntawm kev hloov cov hlau (xws li Ti, V), X yog ib lossis ntau dua ntawm cov pawg tseem ceeb hauv qab no, tus lej ntawm III, IV lub ntsiab ntawm pawg (xws li Al Ge Si), Z yog ib lossis ob peb pawg tsis yog (xws li CNB, thiab lwm yam),


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>> Cov Ntawv Pov Thawj Loj

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>> Cov ntaub ntawv muaj feem xyuam

Xyoo tsis ntev los no, cov ntaub ntawv tus kws tshawb fawb tau tsim cov chav kawm tshiab ntawm 312 hom cov khoom siv ceramic, cov qauv mis rau M3XZ2, ntawm lawv, M yog ib lossis ob peb ntawm kev hloov cov hlau (xws li Ti, V), X yog ib lossis ntau dua ntawm cov pawg tseem ceeb hauv qab no, tus lej ntawm III, IV lub ntsiab pab pawg (xws li Al Ge Si), Z yog ib lossis ob peb lub ntsiab tsis siv (xws li CNB, thiab lwm yam), muaj 312 tus txiv neej ntawm kev kawm txog ternary compound Ti3SiC2 lub ntsiab Ti3AlC2 Ti3GeC2 lawv muaj tib lub qauv siv lead ua, tib yam txog / MMC chaw pab pawgTypical tus sawv cev ntawm cov tebchaw no yog dab tsi Ti3SiC2 yog txheej Ti3SiC2 ceramic khoom Titanium silicon carbide Ti3SiC2 (Titanium silicon carbide) yog ib hom ntawm cov khoom sib xyaw ceramic. kev ua tau zoo ntawm kev tiv taus kub kub oxidation tsis kam ntawm lub zog loj, thiab cov ntaub ntawv hlau xws li cov tshuab conductive ntawm cov thermal conductivity thiab cov ntaub ntawv yas kev txhim kho lub sijhawm nyob rau xyoo 1980 s, ntxhib los ntawm kev khiav ceev opment ntawm tus neeg sawv cev ntxiv dag zog xws li fiber ntau, whisker thiab aviation siab nyob rau hauv kev hwm dua li qhov yuav tsum tau ua lub cav, ceramic matrix sib xyaw ua cov kev tshawb fawb kub nqaij ntawd fiber ntau, whisker txhim kho nws cov tawv yog qhov zoo dua, tab sis vim tias npaj siab tus nqi thiab tsis ntseeg siab , tseem nyuaj nyuaj rau kev thov siv los daws qhov teebmeem no cov kws tshawb nrhiav tau pib tshawb qhov xwm ntawm ob qho tib si hlau thiab ceramic cov khoom ntawm qhov kub siab, thaum kawg pom hauv Ti - Si - C system ib qho titanium silicon carbide Ti3SiC2 (Ti3SiC2) muaj ob qho tib si ntawm hlau ntawm chav sov nrog cov zoo thermal conductivity thiab hluav taws xob conductivity, tsis tshua muaj vickers hardness thiab siab modulus ntawm elasticity; Ductile ntawm chav tsev kub, tuaj yeem ua tiav zoo li hlau, thiab yas ntawm qhov kub siab; Tib lub sijhawm, nws muaj cov yam ntxwv ntawm cov ntaub ntawv ceramic, siab yield zog, siab melting taw tes, siab thermal stability thiab oxidation zoo kuj. Nws tuaj yeem tswj lub zog muaj zog ntawm kev kub. Dab tsi tseem ceeb dua yog tias nws muaj qis txhuam kev sib txhuam coefficient thiab qhov ua tau zoo ntawm tus kheej lub cev zoo dua li cov roj nplua nyeem roj.
Raws li thaum lub Kaum Ob Hlis 2005, lub xeev Ministry of Science thiab Technology hauv peb lub teb chaws tau tshaj tawm hais tias: ib qho muaj cov tswv cuab kev ywj pheej, Ti3SiC2 conductive ceramic ntau lawm ntawm ib tiam tshiab ntawm kev kub ceev tsheb ciav hlau pantograph swb hauv qhov kev pabcuam hauv lub tebchaws 863. , kev ua haujlwm siab cov khoom siv cov cuab yeej ua haujlwm, kev tsim kho hauv tsev nrog nyiaj txiag los ntawm qhov project kom ua lub luag haujlwm hauv tsev kawm ntawv Beijing jiaotong tsev kawm ntawv tom qab ob xyoos tom qab los tuav yeej cov siab-siab huv Ti3SiC2, Ti3AlC2, Ti2SnC ceramic hmoov bulk synthesis technology, kev tsim cov khoom lag luam skateboard, kom ua tiav kawm txog cov khoom siv lub cev thiab tshuaj, kev thau cov khoom siv thauj khoom siv sib tw khiav. Ti3SiC2 series ceramic pob hluav taws tsho ua tiav tau zoo los ntawm pawg neeg tshawb fawb no muaj qhov tshwj xeeb ntawm kev coj ua tau zoo, kev cuam tshuam, tsis kam, puas kam, arc ablation tsis kam, qis qis ntawm cov xaim hu, thiab lwm yam, muaj txiaj ntsig zoo los daws cov teeb meem xws li kev cuam tshuam sai ntawm cov pa roj carbon based thiab hmoov metallurgy cov khau hluav taws xob siv nyob hauv tsev thiab txawv teb chaws, yooj yim tawg, thiab kev puas tsuaj loj rau cov xov hlau. Ti3SiC2 cov log tsheb kauj vab saum ntoo ua tau zoo tsim nyob rau xyoo ntawd tau ua lub luag haujlwm tseem ceeb hauv kev txhim kho kev tsheb nqaj hlau nyob hauv Suav teb.Ii. Cov khoom tseem ceeb ntawm Ti3SiC2 fawm kib khoom siv ceramic
Ti3SiC2 sib txuas ua ke cov yam ntxwv ntawm ceramics thiab cov hlau. Nws lub siab elastic modulus, melting taw tes thiab kub siab ruaj ntseg qhia zoo ib yam li cov khoom zoo nkauj ceramic. High conductivity, siab elastic modulus, siab melting taw tes thiab kub qhov kub tsis txias qhia txog nws cov khoom zoo sib xws ceramic.
Cov lus 1. Cov Khoom Tseem Ceeb ntawm Ti3SiC2 ceramics (Chav sov)
Kev tshawb fawb txog kev tiv thaiv kev puas tsuaj ntawm Ti3SiC2 qhia tau hais tias muaj pseudo-yas puas loj
cheeb tsam hauv qab qhov poob ntawm Ti3SiC2. Qhov laj thawj yog tias Ti3SiC2 muaj ntau lub zog nqus cov hluav taws xob thaum lub sij hawm sib chwv kev puas tsuaj, xws li diffusion microcrack, tawg deflection, grain rub tawm, grain dabtsi yog khoov, thiab lwm yam Ntxiv mus, cov khoom zoo li no muaj qhov zoo-lubricity. Cov khoom zoo li no muaj cov ntawv thov dav raws li cov qauv kub kub, cov khoom siv txhuam hluav taws xob, cov khoom siv hluav taws xob rau tus kheej, cov khoom hloov pauv kub thiab lwm yam. Txawm li cas los xij, qhov tsis tshua muaj qhov nyuaj, hnav tsis kam thiab oxidation tsis kam ntawm cov ntaub ntawv ceramic txwv nws daim ntawv thov nyob rau hauv lub sijhawm tsis xws li qaug zog tsis kam, hnav tsis kam thiab oxidation tsis kam.Iii. Daim ntawv thov ntawm Ti3SiC2 fawm kib cov khoom siv ceramic
(Kuv) Kev Siv Biomedical
Hauv kev kho hniav, cov ntaub ntawv lossis cov khoom siv uas siv hauv qhov chaw nyob hauv qhov ncauj yuav tsum muaj ob qho tib si ruaj khov thiab siv tau ntev dhau sijhawm vim muaj oxidation. Ti3SiC2 muaj ob qho tib si ceramic thiab hlau cov khoom thiab biocompatibility zoo, ua rau nws siv tau rau hauv tib neeg lub cev. Ti3SiC2 tuaj yeem ua tiav cov xov ntawm qhov loj me uas tsis muaj lub roj nplua nyeem, yog li nws tuaj yeem ua rau hauv kev cog hniav lossis mob caj dab rau kev siv hauv stomatology. Ti3SiC2's elastic modulus yog ze dua rau cov txha hniav laus lossis hniav ntau dua li zirconia (1.9 × 105MPa), nce nws qhov peev xwm ntau rau daim ntawv thov xa xov lossis ceramic sab hauv cov yas. Ti3SiC2 cov ntaub ntawv muab los ntawm nws tus kheej tawm cov khoom kub-cov khoom kub muaj cov ntaub so ntswg uas yuav yooj yim rau kev txhim kho thiab khi rau. Qhov coefficient tsawg ntawm kev sib txhuam ua rau nws muaj peev xwm siv nws rau orthodontics kom nce qeeb thiab txo kev sib txhuam.
Corrosion tsis kam thiab oxidation tsis kam yog cov xwm txheej tseem ceeb rau daim ntawv thov ntawm cov khoom siv no hauv qhov ncauj ib puag ncig thiab rau nws txoj kev ruaj ntseg. Cov khoom siv no thiab cov plooj (porcelain hmoov) yog ob qho tib si cov ntaub ntawv ceramic, thiab lawv cov keeb khi yuav zoo dua li ntawm cov hlau thiab cov plooj (porcelain). Yog li ntawd, kev thov daim ntawv thov ntawm cov khoom siv no yuav dav rau cov yas sab hauv cov yas.
Txawm li cas los xij, nyob rau hauv txoj kev npaj tam sim no ntawm Ti3SiC2, cov txheej txheem npaj yuav tsum tau txhim kho kom tau txais cov ntshiab Ti3SiC2 block, thiaj li nkag siab ntau thiab ntau qhov tseeb ntawm cov khoom siv. Cov kev sim txuas ntxiv thiab kev soj ntsuam yog qhov xav tau kom paub meej tias biocompatibility thiab kev coj ua ntawm cov khoom siv.
(2) cov ntawv thov nyob rau hauv cov ntaub ntawv refractoryThaum lub npe nrov ntawm kev siv tshuab hluav taws xob sai hauv kev lag luam ceramic, kev siv lub rooj tog ntawm qhov cub qhov cub tau ua luv luv thiab kev siv cov kev mob tau nruj dua. Yog li, nws yog qhov yuav tsum tau txuas ntxiv txhim kho cov thermal shock tsis kam ntawm cov khoom siv kiln cov khoom siv kom tau raws li cov kev xav tau ntawm kev siv tshuab hluav taws xob sai hauv kev lag luam ceramic.
Raws li hom ntawm qib siab - qib refractory, qhov rooj tog txaj txaj muaj qhov tseem ceeb rau cov khoom lag luam zoo. Ti3SiC2 ceramics tsis rhiab rau cov cua sov ua rau muaj kev kub ntxhov, lawv cov qauv tsis sib xws thiab cov yas cwj pwm thaum kub siab tuaj yeem txo cov nyhuv ntawm thermal kev ntxhov siab.
Cov khoom siv los ntawm △ T = 1400 ℃ thermal poob siab lub zog qhov seem hluav taws xob tseem yog siab dua 300MPa, thermal shock tsis kam ua haujlwm ntawm qhov zoo tshaj plaws tuaj yeem tiv thaiv 900 ℃ kub sib txawv. Nyob rau tib lub sijhawm, Ti3SiC2 ceramics muaj qhov zoo ntawm kev siv tshuaj zoo, kev ua kom yooj yim thiab tus nqi qis dua ntawm cov ntaub ntawv raw, ua rau nws ua qhov zoo tshaj plaws kiln rooj tog khoom siv los tsim.
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