Cov Txheej Txheem Tsim Rau Silicon Carbide Ceramics

Cov Txheej Txheem Tsim Khoom Rau Silicon Carbide Ceramics: Ib Daim Ntawv Qhia Txog Kev Paub Tag Nrho

Cov qauv siv lead ua tshwj xeeb thiab cov yam ntxwv ntawm silicon carbide ceramics ua rau nws cov yam ntxwv zoo heev. Lawv muaj lub zog zoo heev, tawv heev, tiv taus kev hnav zoo heev, tiv taus kev xeb, ua kom sov tau zoo thiab tiv taus kev poob siab zoo. Cov yam ntxwv no ua rau silicon carbide ceramics zoo tagnrho rau kev siv ballistic.

Kev tsim cov silicon carbide ceramics feem ntau siv cov txheej txheem hauv qab no:

1. Kev txhaj tshuaj molding: Kev txhaj tshuaj molding yog ib txoj kev siv dav dav rau kev tsim cov ntawv silicon carbide uas tiv taus cov mos txwv. Cov txheej txheem yooj yim, yooj yim rau kev khiav lag luam, ua haujlwm tau zoo thiab tsim nyog rau kev tsim khoom tas mus li.

2. Kev txhaj tshuaj molding: Kev txhaj tshuaj molding muaj kev hloov pauv zoo heev thiab tuaj yeem tsim cov duab thiab cov qauv nyuaj. Txoj kev no yog qhov zoo tshaj plaws thaum tsim cov khoom siv ceramic silicon carbide uas muaj cov duab tshwj xeeb.

3. Kev nias txias isostatic: Kev nias txias isostatic cuam tshuam nrog kev siv lub zog sib npaug rau lub cev ntsuab, ua rau muaj kev faib tawm sib npaug. Cov thev naus laus zis no txhim kho kev ua haujlwm ntawm cov khoom thiab tsim nyog rau kev tsim cov khoom siv silicon carbide ceramics ua tau zoo.

4. Kev txhaj tshuaj gel: Kev txhaj tshuaj gel yog ib txoj kev txhaj tshuaj tshiab uas ze li ntawm qhov loj me. Lub cev ntsuab tsim tawm muaj cov qauv zoo ib yam thiab muaj zog heev. Cov khoom siv ceramic tau txais tuaj yeem ua tiav los ntawm ntau lub tshuab, uas txo cov nqi ntawm kev ua tiav tom qab sintering. Kev txhaj tshuaj gel yog qhov tsim nyog rau kev tsim cov silicon carbide ceramics nrog cov qauv nyuaj.

Los ntawm kev siv cov txheej txheem tsim no, cov chaw tsim khoom tuaj yeem tau txais cov khoom siv silicon carbide zoo nrog cov khoom siv kho tshuab thiab ballistic zoo heev. Lub peev xwm los tsim cov khoom siv silicon carbide rau hauv ntau yam duab thiab cov qauv tso cai rau kev hloov kho thiab kev ua kom zoo dua kom ua tau raws li cov kev xav tau tshwj xeeb ntawm ntau daim ntawv thov.

Tsis tas li ntawd xwb, qhov pheej yig ntawm cov khoom siv silicon carbide ceramics ua rau nws zoo nkauj dua li cov khoom siv tiv taus ballistic. Kev sib xyaw ua ke ntawm cov yam ntxwv zoo thiab tus nqi tsim nyog ua rau silicon carbide ceramics yog tus neeg sib tw muaj zog hauv qhov chaw ua rog.

Xaus lus, silicon carbide ceramics yog cov khoom siv ballistic ua ntej vim lawv cov khoom zoo heev thiab ntau txoj kev molding. Cov qauv siv lead ua, lub zog, qhov nyuaj, hnav tsis kam, corrosion tsis kam, thermal conductivity thiab thermal shock tsis kam ntawm silicon carbide ceramics ua rau lawv yog qhov kev xaiv zoo rau cov tuam txhab tsim khoom thiab cov kws tshawb fawb. Nrog ntau yam kev tsim cov txheej txheem, cov tuam txhab tsim khoom tuaj yeem kho silicon carbide ceramics kom tau raws li cov ntawv thov tshwj xeeb, kom ntseeg tau tias muaj kev ua tau zoo tshaj plaws thiab kev tiv thaiv. Yav tom ntej ntawm silicon carbide ceramics muaj kev cia siab thaum lawv txuas ntxiv txhim kho thiab ua tau zoo hauv kev ua haujlwm ntawm cov khoom siv ballistic.

Raws li kev tiv thaiv ballistic, kev sib xyaw ua ke ntawm cov ntawv polyethylene thiab cov ntxig ceramic tau ua pov thawj tias muaj txiaj ntsig zoo heev. Ntawm ntau yam kev xaiv ceramic muaj, silicon carbide tau nyiam ntau qhov kev saib xyuas ob qho tib si hauv tsev thiab txawv teb chaws. Nyob rau hauv xyoo tas los no, cov kws tshawb fawb thiab cov chaw tsim khoom tau tshawb nrhiav lub peev xwm ntawm silicon carbide ceramics ua cov khoom siv tiv taus ballistic ua tau zoo vim nws cov khoom zoo heev thiab tus nqi qis.

Silicon carbide yog ib qho tshuaj uas tsim los ntawm kev sib sau ua ke ntawm Si-C tetrahedrons, thiab muaj ob hom siv lead ua ke, α thiab β. Thaum kub sintering qis dua 1600 ° C, silicon carbide muaj nyob rau hauv daim ntawv ntawm β-SiC, thiab thaum kub tshaj 1600 ° C, silicon carbide hloov mus rau α-SiC. Cov kev sib txuas ntawm α-silicon carbide muaj zog heev, thiab nws tuaj yeem tswj tau qhov kev sib txuas siab txawm tias thaum kub siab.