Pob tshab txhuas yuav hloov cov iav armored

2024 Tus sau: Howard Calhoun | [email protected]. Kawg hloov kho: 2023-12-17 10:28

Aluminium oxynitride (los yog AlON) yog cov ceramic uas muaj txhuas, oxygen thiab nitrogen. Cov khoom yog optically pob tshab (> 80%) nyob rau hauv lub ultraviolet, pom thiab ib nrab-yoj ntau yam ntawm cov electromagnetic spectrum. Nws yog tsim tawm txawv teb chaws los ntawm Surmet Corporation raws li ALON hom. Tsis ntev los no, cov kws tshawb fawb Lavxias tau tsim cov thev naus laus zis los tsim cov pob tshab txhuas, uas txawv me ntsis ntawm cov khoom siv sib txawv.

Kev piav qhia

Txoj kev loj hlob ntawm ib qho tshwj xeeb alloy tau qhib qhov kev cia siab tshiab hauv kev lag luam tiv thaiv, kev tshawb fawb thiab kev tsim kho. Raws li cov ntaub ntawv raug cai, ALON:

• 4 npaug zog dua tempered quartz iav;
• 85% nyuaj dua sapphire;
• ze li 15% ntau dua li magnesium aluminate spinel.

Los ntawm txoj kev, cov ntxhia spinel yog cov neeg sib tw ncaj qha ntawm pob tshab txhuas thiabinferior rau oxynitride nyob rau hauv ib tug xov tooj ntawm tsis.

ALON yog cov khoom lag luam nyuaj tshaj plaws uas muaj polycrystalline ntshiab ceramic. Kev sib xyaw ua ke ntawm cov khoom siv kho qhov muag thiab cov khoom siv kho qhov muag ua rau cov khoom siv no ua tus neeg sib tw rau lub teeb yuag, ua haujlwm zoo armored khoom xws li mos txwv thiab tawg-pov thawj iav, cov ntsiab lus rau infrared optical systems. Aluminium oxynitride kuj tseem siv los tsim cov pob tshab cuam tshuam-resistant qhov rais, portholes, daim hlau, domes, rods, hlab thiab lwm yam khoom siv cov tsoos ceramic hmoov ua technologies.

Mechanical Properties

Aluminium oxynitride muaj kev ua tau zoo:

• Modulus ntawm elasticity: 334 GPa.
• Shear modulus: 135 GPa.
• Poisson tus piv: 0, 24.
• Knoop hardness: 1800kg/mm2 ntawm 0.2kg load.
• Fracture resistance: 2 MPa m1/2.
• Bending zog: 0.38-0.7 GPa.
• Compressive zog: 2.68 GPa.

Optical thiab thermal zog

Thaum kuaj pob tshab txhuas, cov ntsuas hauv qab no tau txais:

• Heat peev: 0.781 J/K.
• Thermal conductivity: 12.3 W / (m K).
• Coefficient ntawm thermal expansion: 4.7 × 10 -6/°C.
• Txoj kev sib txawv: 200-5000 nm.

ALON tseem tiv taus hluav taws xob thiab kev puas tsuaj los ntawm ntau cov kua qaub, alkalis thiab dej.

Tau txais

Pob tshab txhuas oxynitride yog tsim los ntawm cov hmoov sintering zoo li lwm yam khoom siv ceramic. Thaum lub US Navy tab tom tsis khoom tsim cov khoom siv phom sij tshiab hu ua dag spinel, Surmet Corporation twb tau tso nws tus kheej version ntawm "bulletproof iav" hu ua ALON.

Tshuaj hauv Raytheon lub chaw soj nstuam, cov hmoov tshwj xeeb yog molded thiab tuav ntawm qhov kub siab heev. Qhov sib xyaw ntawm qhov sib xyaw yuav txawv me ntsis: cov ntsiab lus txhuas yog kwv yees li 30% mus rau 36%, uas cuam tshuam me ntsis rau kev ua haujlwm (qhov txawv tsuas yog 1-2%).

Cov txheej txheem cua sov ua rau cov hmoov ua kom sai liquefy thiab txias, tawm hauv cov molecules loosely teem ib yam li lawv tseem ua kua. Nws yog cov qauv siv lead ua no uas muab cov pob tshab txhuas qib ntawm lub zog thiab khawb kuj piv rau sapphire.

Cov khoom tsim tau raug kev kho cua sov (compaction) ntawm qhov kub siab, ua raws li kev sib tsoo thiab polishing kom txog thaum pob tshab. Cov khoom tuaj yeem tiv taus qhov kub txog li 2100 ° C hauv cov pa roj inert. Sib tsoo thiab polishing ho txhim kho kev cuam tshuam thiab lwm yam khoom siv kho tshuab.

Yim sib npaug

Cov kws tshawb fawb Lavxias tau tsim pob tshab txhuas hauv xyoo 2017. Raws li cov kws tshaj lij los ntawm NRNU MEPhI, cov tshuab tsim khoom yogkho tau zoo heev. Hauv kev tsim cov compacts, cov txheej txheem ntawm spark-plasma sintering yog siv.

Tsis zoo li cov npoj yaig txawv teb chaws, cov neeg tsim khoom hauv tsev tsis dhau hluav taws xob tawm los ntawm cov cua sov sab nraud, tab sis ncaj qha los ntawm pwm. Cov kws tshawb fawb tau hais tias cov cuab yeej pob tshab hauv tsev yog piv rau lub zog rau cubic zirconia, tab sis tib lub sijhawm muaj kev cuam tshuam lub zog.

Sib piv ntawm txhuas armor nrog mos mos iav

Cov iav tsis muaj phom sij muaj ntau txheej ntawm polycarbonate sandwiched ntawm ob txheej iav. Ib yam li ntawd, pob tshab aluminium armor muaj peb txheej:

• txheej txheej - aluminium oxynitride;
• middle txheej - iav;
• rov qab txheej - polymer thaub qab.

Tab sis qhov zoo sib xws xaus rau ntawd. Aluminium armor tuaj yeem nres tib cov mos txwv los ntawm cov riam phom me me raws li cov iav tsis muaj phom sij, tab sis nws tseem yuav ua pob tshab txawm tias raug rho tawm haujlwm yam tsis muaj qhov tawg. Tsis tas li ntawd, lub zog ntawm ALON yog ntau dua.

Aluminium oxynitride armor tuaj yeem ua rau yuav luag txhua yam. Nws tsis ntshai xuab zeb, pob zeb lossis hmoov av. Kev tiv thaiv rau cov ntaub ntawv abrasive yog siab heev. Txawm hais tias cov khoom zoo heev ntawm pob tshab aluminium, cov khoom siv no tsis siv dav. Qhov kev cuam tshuam loj tshaj plaws yog tus nqi (3-5 npaug kim dua li cov iav tsis muaj phom sij). ALON yog tam sim no siv tsuas yog rau lo ntsiab muag ntawm kev soj ntsuam ntsuas thiab sensors.missiles.