Nyob rau hauv tib neeg lub tswv yim, ceramic yog fragile.Txawm li cas los xij, tom qab kev siv thev naus laus zis niaj hnub no, ceramics "hloov", dhau los ua cov khoom siv tshiab, muaj zog, tshwj xeeb tshaj yog nyob rau hauv cov khoom siv phom sij nrog lub cev tshwj xeeb, ceramics ci ntsa iab, dhau los ua cov khoom siv phom sij nrov heev.
① Lub hauv paus ntsiab lus tsis zoo ntawm cov khoom siv ceramic
Lub hauv paus ntsiab lus ntawm kev tiv thaiv armor yog siv lub zog ntawm qhov projectile, ua kom qeeb, thiab ua kom tsis muaj mob.Feem ntau cov khoom siv engineering, xws li cov ntaub ntawv hlau, nqus lub zog los ntawm cov yas deformation ntawm cov qauv, thaum cov ntaub ntawv ceramic nqus zog los ntawm cov txheej txheem micro-crushing.
Lub zog nqus cov txheej txheem ntawm mos mos ceramics tuaj yeem muab faib ua peb theem:
(1) Kev cuam tshuam rau theem pib: Lub projectile cuam tshuam rau lub ntsej muag ceramic, ua rau lub taub hau blunt thiab absorbing zog thaum lub sij hawm ntawm crushing thiab tsim me me thiab nyuaj tawg ntawm ceramic nto;
(2) Erosion theem: Lub blunted projectile txuas ntxiv mus erode ntawm fragmented cheeb tsam, tsim ib tug nruam txheej ntawm ceramic fragments;
(3) Deformation, tawg, thiab tawg theem: Thaum kawg, tensile stress yog generated nyob rau hauv ceramic, ua rau nws tawg.Tom qab ntawd, lub phaj rov qab deforms, thiab tag nrho cov seem zog yog absorbed los ntawm deformation ntawm cov khoom phaj rov qab.Thaum lub sij hawm tus txheej txheem ntawm projectile cuam tshuam rau ceramics, ob qho tib si projectile thiab ceramics puas.
② Yuav tsum muaj cov khoom siv ntawm cov mos txwv ceramics
Vim yog lub brittleness ntawm ceramic nws tus kheej, nws yog fractured thaum cuam tshuam los ntawm lub projectile es tsis yog yas deformation.Nyob rau hauv qhov kev txiav txim ntawm tensile load, qhov tawg ua ntej tshwm sim nyob rau hauv heterogeneous thaj chaw xws li pores thiab grain ciam teb.Yog li ntawd, txhawm rau txhawm rau txo qis qhov kev ntxhov siab ntawm lub microscopic, cov khoom siv armor ceramics yuav tsum yog cov khoom zoo nrog cov porosity tsawg (txog 99% ntawm tus nqi theoretical ntom ntom) thiab cov qauv zoo.
| Khoom | Kev cuam tshuam rau kev ua haujlwm ntawm cov mos txwv |
| Qhov ntom | Qhov zoo ntawm armor system |
| Hardness | Lub degree ntawm kev puas tsuaj rau lub projectile |
| Modulus ntawm elasticity | Kev ntxhov siab nthwv dej sib kis |
| Kev siv zog | Kev tiv thaiv rau ntau lub tshuab |
| Fracture toughness | Kev tiv thaiv rau ntau lub tshuab |
| Cov qauv tawg | Muaj peev xwm nqus tau lub zog |
| Microstructure (grain loj, theem ob, theem hloov lossis amorphous (kev ntxhov siab vim), porosity) | Muaj feem xyuam rau txhua qhov kev ua tau zoo tau piav qhia hauv kab laug sab |
Cov khoom ntawm cov ntaub ntawv thiab lawv cov teebmeem ntawm cov mos txwv cov khoom
Silicon carbide ceramic density yog qhov tsawg, siab hardness, yog tus nqi-zoo structural ceramics, yog li nws kuj yog cov khoom siv dav siv ntau tshaj plaws hauv Suav teb.
Boron carbide ceramics muaj qhov qis tshaj plaws thiab qhov nyuaj tshaj plaws ntawm cov ceramics, tab sis tib lub sijhawm, lawv cov kev xav tau rau kev siv tshuab kuj tseem siab heev, yuav tsum tau kub thiab siab sintering, yog li tus nqi kuj yog siab tshaj ntawm peb cov ceramics.
Post lub sij hawm: Nov-22-2023