Ceramik na Alumina mai hana ballistic 99%: Halaye, Kerawa, da Amfani

The99% aluminum yumbu mai hana ballisticyumbu ne mai inganci na injiniya wanda ke da α-alumina (α-Al2O₃) a matsayin babban matakin lu'ulu'u kuma abun ciki na alumina ya wuce 98%. Yana da matsayi mai mahimmanci a cikin kariyar sulke na mutum da na abin hawa saboda tsananin taurinsa, matsakaicin yawansa, juriyar lalacewa mai kyau, da kuma rabo mai kyau na aiki-kuɗi. Tsarin kariyarsa ya dogara ne akan babban taurinsa da modulus don kumbura da raba harsashin da ke shigowa, yayin da yake sha da wargaza yawancin kuzarin motsi na harsashin ta hanyar tsarin karyewar sa. Sauran kuzarin ana sha shi ta hanyar kayan haɗin gwiwa (misali, polyethylene mai nauyin ƙwayoyin cuta ko masana'anta mai jagora ɗaya). Manyan halaye na zahiri sun haɗa da yawan yawa wanda bai gaza 3.9 g/cm³ ba, taurin Mohs na 9, ƙarfin lanƙwasa har zuwa 580 MPa, tare da ƙarancin shan ruwa (<0.006%) da kwanciyar hankali mai kyau na zafi.

Tsarin kera yana farawa da zaɓar foda mai ƙarfi, mai laushi, wanda yawanci yana da girman ƙananan ƙwayoyin cuta (D50 kusan 0.35 ~ 1.4 μm). Manyan dabarun ƙirƙirar sun haɗa da matse busasshiyar ƙasa da matsewa ta isostatic, sannan a biyo baya da yawa ta hanyar yin sintering a cikin yanayi ko matsewa mai zafi. Don shawo kan karyewar yumbu da inganta juriya mai yawa, bincike na gaba yana mai da hankali kan fasahar tauri, kamar gabatar da gashin silicon carbide ko zirconia don ƙirƙirar yumbu mai haɗakar alumina matrix. Waɗannan kayan haɗin na iya hana yaɗuwar fasawa yadda ya kamata a matakin microstructural, suna ƙara ƙarfi sosai, juriyar tasiri, da kuma aikin ballistic gabaɗaya.

A aikace-aikace na zahiri, ana ƙera kashi 99% na yumburan alumina zuwa tayal masu siffar yau da kullun (murabba'ai, murabba'ai, hexagons) ko kuma kayan da aka lanƙwasa na musamman don haɗa faranti masu ergonomic ballistic insert. Faranti masu tauri da aka yi da wannan kayan sun wuce gwaje-gwajen ballistic na ƙwararru kamar NIJ Standard-0101.06 Level III da IV. Nazarin gwaji ya nuna cewa ƙara ɗaurewa ga faranti na yumbu na iya inganta juriyarsu ga shiga cikin ruwa yadda ya kamata. Saboda kyawun aikin da yake yi na hana harsashi shiga, ƙarancin nauyi da farashi mai kyau, kashi 99% na yumbun hana harsashi alumina ya zama babban abu a kasuwar faranti masu hana harsashi a yumbu.