Nā Keramika SiC Sintered: Nā Pōmaikaʻi o nā Huahana Ballistic Ceramic SiC
Nā huahana pale pōkā seramika silikona carbideke lilo nei i mea kaulana loa i ke kahua o ka palekana pilikino a me ka pūʻali koa ma muli o kā lākou hana maikaʻi loa a me ka hana. Loaʻa i kēia mau keramika kahi ʻike SiC ≥99% a me ka paʻakikī (HV0.5) ≥2600, e lilo ana lākou i mea koho no nā noi ballistic e like me nā ʻaʻahu pale pōkā a me nā mea pale no nā kaʻa kaua a me nā kaʻa kaua.
ʻO ka huahana nui o kēia moʻo he pepa pale pōkā silicon carbide ceramic. ʻO kona haʻahaʻa haʻahaʻa a me ke kaumaha māmā e kūpono loa ia no nā lako pale pōkā o kēlā me kēia koa, ʻoiai hoʻi e like me ka uhi o loko o nā ʻaʻahu pale pōkā. Eia kekahi, hāʻawi ia i nā pono koʻikoʻi ma ke ʻano o ka lōʻihi, ka ikaika a me ke kūpaʻa wela.
ʻElua mau ʻano kristal o nā keramika Silicon carbide (SiC), cubic β-SiC a me hexagonal α-SiC. Loaʻa i kēia mau keramika nā pilina covalent ikaika, nā waiwai mechanical ʻoi aku ka maikaʻi, ke kūpaʻa oxidation, ke kūpaʻa ʻaʻahu a me kahi coefficient friction haʻahaʻa ma mua o nā keramika ʻē aʻe e like me ka alumina a me ka boron carbide. ʻO ko lākou conductivity thermal kiʻekiʻe, ka coefficient liʻiliʻi o ka hoʻonui thermal, a me ke kūpaʻa maikaʻi loa i ka haʻalulu thermal a me ka corrosion kemika e hoʻomaʻamaʻa hou aku i kā lākou mau noi ākea.
ʻO ke kumumanaʻo pale pōkā o nā keramika silicon carbide aia i kona hiki ke hoʻopuehu a omo i ka ikehu pōkā. ʻOiai ʻo nā mea ʻenekinia kuʻuna e omo i ka ikehu ma o ka hoʻololi plastik, ʻo nā mea keramika, me ka silicon carbide, hana pēlā ma o nā microfractures.
Hiki ke hoʻokaʻawale ʻia ke kaʻina hana omo ikehu o nā keramika pale pōkā silicon carbide i ʻekolu mau pae. I ka wā o ka hopena mua, paʻi ka pōkā i ka ʻili keramika, e hoʻomāʻū ana i ka pōkā a kuʻi i ka ʻili keramika, e hana ana i nā wahi liʻiliʻi a paʻakikī i ʻoki ʻia. I ka wā o ka erosion, hoʻomau ka pōkā blunt i ka hoʻopōʻino ʻana i ka ʻāpana ʻōpala, e hana ana i kahi papa mau o nā ʻōpala keramika. ʻO ka hope loa, i ka wā o ka deformation, crack a me nā fracture phases, ua hoʻopilikia ʻia ka keramika i nā tensile stresses, e alakaʻi ana i kona haki hope loa. A laila hoʻopau ʻia ke koena o ka ikehu e ka deformation o ka mea backplate.
ʻO kēia mau waiwai maikaʻi loa a me ke kaʻina hana omo ikehu ʻekolu-paepae e hiki ai i nā huahana ballistic ceramic silicon carbide ke hoʻopau pono i ka hopena o nā pōkā a hoʻolilo iā lākou i mea ʻino ʻole. Hiki i ka helu pale pōkā ke piʻi i ka pae maʻamau ʻAmelika 4, e hāʻawi ana i ka palekana kiʻekiʻe loa a ʻo ia ke koho mua o nā loea koa ma ka honua.
I ka hōʻuluʻulu ʻana, loaʻa i nā keramika sintered silicon carbide a me nā huahana bulletproof silicon carbide ceramic nā pono kūikawā ma ke ʻano o nā waiwai mechanical, ke kūpaʻa wela, a me ka pono bulletproof. Me ko lākou mau waiwai kiʻekiʻe, hoʻohana nui ʻia kēia mau keramika ma ke ʻano he mau mea uhi no nā ʻaʻahu bulletproof a me nā mea pale no nā kaʻa kaua a me nā kaʻa kaua. ʻO ko lākou haʻahaʻa haʻahaʻa a me ke kaumaha māmā e kūpono ai no ka pale ballistic pilikino. Ke hoʻomau nei ka holomua o ka ʻenehana, hiki iā mākou ke manaʻo i nā hoʻomohala hou aʻe a me nā noi o kēia mau keramika kupaianaha i ka pale pilikino a me ka koa.
Ka manawa hoʻouna: ʻAukake-24-2023