99% Alumina Anti-Ballistic Ceramics: Katundu, Kupanga, ndi Kugwiritsa Ntchito

The99% alumina yotsutsana ndi mpira wa ceramicNdi ceramic yopangidwa mwaukadaulo yogwira ntchito kwambiri yokhala ndi α-alumina (α-Al2O₃) ngati gawo loyambirira la kristalo komanso kuchuluka kwa alumina kopitilira 98%. Imakhala ndi malo ofunikira pachitetezo cha zida za munthu ndi zamagalimoto chifukwa cha kuuma kwake kwakukulu, kuchuluka kwapakati, kukana kuvala bwino, komanso chiŵerengero chabwino cha mtengo ndi magwiridwe antchito. Njira yake yotetezera imadalira kwambiri kuuma kwake kwakukulu ndi modulus kuti ipangitse kuti projectile yomwe ikubwera ikhale yosalala ndikugawaniza, pomwe imatenga ndikubalalitsa mphamvu zambiri za projectile kudzera mu njira yake yosweka. Mphamvu yotsalayo imayamwa ndi zinthu zomangira (monga polyethylene yolemera kwambiri kapena nsalu yolunjika). Zinthu zofunika kwambiri zakuthupi zimaphatikizapo kuchuluka kwa bulk osachepera 3.9 g/cm³, kuuma kwa Mohs kwa 9, mphamvu yosinthasintha mpaka 580 MPa, kuphatikiza ndi kuyamwa kochepa kwa madzi (<0.006%) komanso kukhazikika kwabwino kwa kutentha.

Njira yopangira imayamba ndi kusankha ufa wa alumina woyera kwambiri, wabwino kwambiri, womwe nthawi zambiri umakhala ndi tinthu tating'onoting'ono ta submicron (D50 pafupifupi 0.35 ~ 1.4 μm). Njira zazikulu zopangira zimaphatikizapo kukanikiza kouma ndi kukanikiza kwa isostatic, kutsatiridwa ndi kukhuthala kudzera mu sintering yamlengalenga kapena kukanikiza kotentha. Kuti athetse kufooka kwa ceramic ndikuwonjezera kukana kwa kugunda kwamitundu yambiri, kafukufuku wotsogola amayang'ana kwambiri ukadaulo wolimba, monga kuyambitsa ndevu za silicon carbide kapena zirconia kuti apange alumina matrix composite ceramics. Zipangizozi zophatikizika zimatha kuletsa kufalikira kwa ming'alu pamlingo wa microstructural, ndikuwonjezera kwambiri kulimba, kukana kukhudza, komanso magwiridwe antchito onse a ballistic.

Mu ntchito zenizeni, 99% ya alumina ceramics nthawi zambiri imapangidwa kukhala matailosi ooneka ngati ofanana (mabwalo, ma rectangles, ma hexagon) kapena zidutswa zopindika zapadera kuti zigwirizane ndi ma ballistic insert plates. Ma hard arm plates opangidwa kuchokera kuzinthuzi apambana mayeso aukadaulo a ballistic monga NIJ Standard-0101.06 Level III ndi IV. Kafukufuku woyeserera wasonyeza kuti kuwonjezera ma ceramic plates omangika kungathandize kwambiri kukana kulowa kwawo. Chifukwa cha magwiridwe antchito abwino kwambiri a zipolopolo, kulemera kochepa komanso mtengo wopikisana, 99% ya alumina ceramic yomangika zipolopolo yakhala chinthu chodziwika bwino pamsika wa ceramic plates yomangika zipolopolo.