ʻO ka 'iwi paʻakikī' i hūnā hohonu ʻia i loko o ka ʻenehana: pehea e hoʻololi hou ai nā keramika silicon carbide i ka wā e hiki mai ana

Ma hope o nā holomua ʻenehana i ka hoʻouka wikiwiki ʻana o nā kaʻa ikehu hou a me nā mīkini mokulele ʻoi aku ka maikaʻi, aia kahi mea maʻamau akā ikaika -nā keramika silicon carbideʻO kēia keramika holomua i haku ʻia me nā mea kalapona a me ka silicon, ʻoiai ʻaʻole i kūkākūkā pinepine ʻia e like me nā ʻāpana a me nā pila, ua lilo ia i "hero huna" ma nā kahua kiʻekiʻe he nui ma muli o kāna hana "paʻakikī".
ʻO ke ʻano koʻikoʻi loa o nā keramika silicon carbide ʻo ko lākou "hiki ke hoʻololi ikaika loa" i nā wahi koʻikoʻi. Hiki i nā mea maʻamau ke hōʻino ʻia ka hana ma nā mahana kiʻekiʻe, e like me ka "heatstroke failure", akā hiki nō iā lākou ke mālama ma mua o 80% o ko lākou ikaika a hiki i ka 1200 ℃, a hiki ke kū i nā hopena koʻikoʻi o 1600 ℃ i ka wā pōkole. ʻO kēia kūpaʻa wela e hoʻokaʻawale iā ia i nā hiʻohiʻona mahana kiʻekiʻe, e like me ka lilo ʻana i mea nui no nā ʻāpana wela o nā mīkini mokulele. I ka manawa like, ʻo kona paʻakikī ka lua wale nō i ka daimana, me ka paʻakikī Mohs o 9.5. Me ka pale ʻana i ka palaho maikaʻi loa, hiki iā ia ke mālama i ke kūpaʻa i nā wahi waikawa ikaika a me ka alkali, a ʻoi aku ka lōʻihi o kona ola lawelawe ma mua o nā mea metala kuʻuna.

Ma nā kahua o ka uila a me ka hoʻokele wela, ua hōʻike nā keramika silicon carbide i nā ʻano o kahi "mea pāʻani a puni". ʻOi aku kona conductivity wela i kekahi mau manawa ma mua o nā keramika alumina kuʻuna, ʻo ia hoʻi ke kau ʻana i kahi "hoʻoheheʻe wela kūpono" ma nā mea uila, hiki ke wehe koke i ka wela i hana ʻia i ka wā o ka hana ʻana o nā lako.
I kēia mau lā, ua pālahalaha ka loaʻa ʻana o nā keramika silicon carbide ma nā kahua koʻikoʻi he nui. I loko o nā kaʻa ikehu hou, ua hūnā ʻia i loko o ka module mana, e hoʻopōkole mālie ana i ka manawa hoʻouka a hoʻolōʻihi i ka laulā; Ma ke kahua aerospace, hiki i nā ʻāpana turbine i hana ʻia mai ia mea ke hōʻemi i ke kaumaha o nā lako a hoʻonui i ka thrust; I ka hana semiconductor, ʻo kona mau ʻano hoʻonui wela haʻahaʻa e hana i nā lako kikoʻī e like me nā mīkini lithography i ʻoi aku ka pololei a me ka paʻa; ʻOiai ma ka ʻoihana nuklea, ua lilo ia i mea kūkulu koʻikoʻi no nā reactors ma muli o kona pono kū'ē i ka radiation.
I ka wā ma mua, he mea keakea ke kumukūʻai i ka hoʻolaha ʻana o nā keramika silicon carbide, akā me ka oʻo ʻana o ka ʻenehana hoʻomākaukau, ua emi mālie kona kumukūʻai, a ke hoʻomaka nei nā ʻoihana he nui e hauʻoli i nā waiwai o kēia kipi mea. Mai nā kaʻa uila no ka huakaʻi i kēlā me kēia lā a hiki i nā mokulele no ka ʻimi ʻana i ka lewa, ʻo kēia mea "iwi paʻakikī" i ʻike ʻole ʻia e hoʻokele nei i ka ʻenehana i kahi wā e hiki mai ana me ka ʻoi aku ka maikaʻi a me ka hilinaʻi ma ke ʻano haʻahaʻa akā ikaika.