I-99% Alumina Anti-Ballistic Ceramics: Izakhiwo, Ukukhiqiza, kanye Nezicelo

II-99% alumina anti-ballistic ceramiciyi-ceramic yobunjiniyela esebenza kahle kakhulu ene-α-alumina (α-Al2O₃) njengesigaba esiyinhloko sekristalu kanye nokuqukethwe kwe-alumina okungaphezu kuka-98%. Ithatha isikhundla esibalulekile ekuvikelweni kwezikhali zomuntu siqu nezemoto ngenxa yobunzima bayo obuphezulu, ubuningi obuphakathi, ukumelana okuhle kokuguguleka, kanye nesilinganiso esihle sezindleko nokusebenza. Indlela yayo yokuzivikela incike kakhulu ebulukhunini bayo obuphezulu kanye ne-modulus ukuze ibuthuntu futhi ihlukanise i-projectile engenayo, kuyilapho imunca futhi ihlakaza iningi lamandla e-kinetic e-projectile ngenqubo yayo yokuqhekeka. Amandla asele abese amuncwa yizinto ezihlanganisiwe ezisekelayo (isb., i-polyethylene enesisindo sama-molecule amaningi noma indwangu eqondiswayo). Izakhiwo ezibalulekile zomzimba zifaka phakathi ubuningi obungaphansi kuka-3.9 g/cm³, ubulukhuni be-Mohs obungu-9, amandla okuguquguquka afinyelela ku-580 MPa, ahlanganiswe nokumuncwa kwamanzi aphansi (<0.006%) kanye nokuzinza okuhle kokushisa.

Inqubo yokukhiqiza iqala ngokukhethwa kwezimpushana ze-alumina ezihlanzekile kakhulu, ezivame ukuba nosayizi wezinhlayiya ze-submicron (D50 cishe u-0.35 ~ 1.4 μm). Amasu okuqala okwakha afaka phakathi ukucindezela okomile kanye nokucindezela kwe-isostatic, kulandelwe ukuqina ngokusebenzisa i-atmospheric sintering noma ukucindezela okushisayo. Ukuze kunqotshwe ubuthakathaka obungokwemvelo be-ceramic futhi kuthuthukiswe ukumelana nokushaya okuningi, ucwaningo oluphambili lugxila kubuchwepheshe bokuqinisa, njengokwethula ama-whiskers e-silicon carbide noma i-zirconia ukudala i-alumina matrix composite ceramics. Lezi zinto ezihlanganisiwe zingavimbela ngempumelelo ukusabalala kwe-crack ezingeni le-microstructural, zithuthukise kakhulu ukuqina, ukumelana nomthelela, kanye nokusebenza kwe-ballistic jikelele.

Ezisetshenzisweni ezisebenzayo, ama-ceramic e-alumina angu-99% avame ukwenziwa abe amathayili anomumo ojwayelekile (izikwele, ama-rectangle, ama-hexagon) noma izingcezu ezigobile ezimumo okhethekile ukuze kuhlanganiswe ama-plate e-ballistic insert ergonomic. Ama-plate e-armor aqinile enziwe ngalezi zinto adlule ezivivinyweni zobungcweti ze-ballistic ezifana ne-NIJ Standard-0101.06 Level III kanye ne-IV. Izifundo zokuhlola zikhombisile ukuthi ukwengeza ukuvalelwa kwama-plate e-ceramic kungathuthukisa ngempumelelo ukumelana kwawo nokungena. Ngenxa yokusebenza kwayo okuvelele kokumelana nezinhlamvu, isisindo esiphansi kanye nezindleko zokuncintisana, i-ceramic ye-alumina engu-99% evikela izinhlamvu ibe yinto evelele emakethe yama-plate e-ceramic avikela izinhlamvu.