Kev tsim cov txheej txheem rau Silicon Carbide Ceramics

Kev Tsim Cov Txheej Txheem rau Silicon Carbide Ceramics: Kev Pom Zoo

Cov qauv siv lead ua tshwj xeeb thiab cov khoom ntawm silicon carbide ceramics pab txhawb rau nws cov khoom zoo heev. Lawv muaj lub zog zoo heev, tsis tshua muaj siab hardness, zoo heev hnav tsis kam, corrosion kuj, siab thermal conductivity thiab zoo thermal shock kuj. Cov khoom no ua silicon carbide ceramics zoo tagnrho rau kev siv ballistic.

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

1. Compression molding: Compression molding yog ib txoj kev siv dav rau kev tsim cov ntawv silicon carbide mos txwv. Cov txheej txheem yog yooj yim, yooj yim rau kev khiav lag luam, siab nyob rau hauv efficiency thiab haum rau tas mus li ntau lawm.

2. Txhaj tshuaj molding: Txhaj tshuaj molding muaj kev hloov tau zoo heev thiab tuaj yeem tsim cov duab thiab cov qauv. Txoj kev no yog qhov tshwj xeeb tshaj yog thaum tsim tshwj xeeb zoo li silicon carbide ceramic qhov chaw.

3. Txias isostatic nias: Txias isostatic nias nrog rau daim ntawv thov ntawm lub zog sib xws rau lub cev ntsuab, uas ua rau muaj qhov sib txawv ntom ntom. Cov thev naus laus zis no txhim kho cov khoom lag luam zoo thiab tsim nyog rau kev tsim cov khoom siv ua haujlwm siab silicon carbide ceramics.

4. Gel txhaj tshuaj molding: Gel txhaj molding yog ib qho tshiab nyob ze ntawm qhov loj me me molding txoj kev. Lub cev ntsuab tsim muaj cov qauv zoo sib xws thiab lub zog siab. Cov khoom siv ceramic tau ua tiav los ntawm ntau lub tshuab, uas txo tus nqi ntawm kev ua haujlwm tom qab sintering. Gel txhaj molding yog tshwj xeeb tshaj yog tsim rau kev tsim cov silicon carbide ceramics nrog cov qauv nyuaj.

Los ntawm kev siv cov txheej txheem tsim no, cov tuam txhab tsim khoom tuaj yeem tau txais cov khoom zoo silicon carbide ceramics nrog cov khoom siv zoo heev thiab cov khoom sib tw. Lub peev xwm los tsim cov silicon carbide ceramics rau hauv ntau yam duab thiab cov qauv tso cai rau kev hloov kho thiab kev ua kom zoo kom tau raws li qhov tshwj xeeb ntawm cov ntawv thov sib txawv.

Tsis tas li ntawd, tus nqi-zoo ntawm silicon carbide ceramics tsub kom nws attractiveness raws li ib tug high-performance ballistic-resistant khoom. Qhov kev sib xyaw ua ke ntawm cov khoom tsim nyog thiab tus nqi tsim nyog ua rau silicon carbide ceramics muaj zog sib tw hauv lub cev armor qhov chaw.

Hauv kev xaus, silicon carbide ceramics yog cov khoom siv ballistic vim lawv cov khoom zoo heev thiab ntau yam molding txoj kev. Cov qauv siv lead ua, lub zog, hardness, hnav tsis kam, corrosion kuj, thermal conductivity thiab thermal shock kuj ntawm silicon carbide ceramics ua rau lawv xaiv zoo rau cov tuam txhab thiab cov kws tshawb fawb. Nrog rau ntau yam txheej txheem tsim, cov tuam ntxhab tuaj yeem txiav cov khoom siv silicon carbide ceramics kom tau raws li cov kev siv tshwj xeeb, ua kom muaj kev ua tau zoo thiab kev tiv thaiv. Lub neej yav tom ntej ntawm silicon carbide ceramics tau cog lus tias lawv txuas ntxiv txhim kho thiab ua tau zoo hauv cov khoom siv ballistic.

Raws li kev tiv thaiv ballistic muaj kev txhawj xeeb, kev sib xyaw ntawm cov ntawv polyethylene thiab ceramic inserts tau ua pov thawj tias muaj txiaj ntsig zoo. Ntawm ntau yam kev xaiv ceramic muaj, silicon carbide tau nyiam cov xim zoo nkauj hauv tsev thiab txawv teb chaws. Nyob rau hauv xyoo tas los no, cov kws tshawb fawb thiab cov tuam txhab tsim khoom tau tshawb nrhiav lub peev xwm ntawm silicon carbide ceramics ua cov khoom siv zoo tshaj plaws vim nws cov khoom zoo heev thiab tus nqi qis.

Silicon carbide yog ib qho kev sib xyaw ua ke los ntawm stacking Si-C tetrahedrons, thiab muaj ob daim ntawv siv lead ua, α thiab β. Ntawm qhov kub siab tshaj 1600 ° C, silicon carbide muaj nyob rau hauv daim ntawv ntawm β-SiC, thiab thaum kub siab tshaj 1600 ° C, silicon carbide hloov mus rau α-SiC. Covalent daim ntawv cog lus ntawm α-silicon carbide yog qhov muaj zog heev, thiab nws tuaj yeem tswj tau cov ntawv cog lus muaj zog txawm tias nyob rau qhov kub thiab txias.