Hana maikaʻi loa o ka waʻa kristal silicon carbide i kahi mahana kiʻekiʻe

He mea hana ka waʻa kristal silicon carbide me nā waiwai maikaʻi loa, e hōʻike ana i ke kūpaʻa wela a me ka pala i nā wahi wela kiʻekiʻe. He hui ia i haku ʻia me nā mea kalapona a me silicon me ka paʻakikī kiʻekiʻe, ke kiko heheʻe kiʻekiʻe a me ka conductivity thermal maikaʻi loa. ʻO kēia ka mea e kūpono ai nā waʻa kristal silicon carbide no nā ʻano hana wela kiʻekiʻe like ʻole, e like me ka aerospace, ka ikehu nukelea, nā kemika, a pēlā aku.

ʻO ka mea mua, he kūpaʻa wela maikaʻi loa ka waʻa kristal silicon carbide i nā wahi wela kiʻekiʻe. Ma muli o kona ʻano kristal kūikawā, hiki i ka waʻa kristal silicon carbide ke mālama i kona mau waiwai kino a me ke kemika ma lalo o nā kūlana mahana koʻikoʻi. Hiki iā ia ke kū i nā mahana a hiki i 1500 degere Celsius me ka ʻole o ka deformation a i ʻole ka haki ʻana, ka mea e hoʻohana nui ʻia ai i ka hoʻoheheʻe ʻana i ka mahana kiʻekiʻe, ka hopena wela kiʻekiʻe a me nā kaʻina hana ʻē aʻe.

ʻO ka lua, he kūpaʻa maikaʻi loa ka waʻa kristal silicon carbide i ka pala i ke kaiapuni wela kiʻekiʻe. I kekahi mau kaiapuni kemika koʻikoʻi, e hoʻopilikia ʻia nā metala he nui a me nā mea ʻē aʻe e ka pala, akā hiki i ka waʻa kristal silicon carbide ke mālama i kona kūpaʻa. ʻAʻole ia e pala e ka waikawa, alkali a me nā mea ʻino ʻē aʻe, ʻo ia ka mea e hoʻohana nui ʻia ai i nā kemika, nā ʻoihana uila a me nā ʻoihana ʻē aʻe.

Eia kekahi, ʻo ke alakaʻi wela o ka waʻa kristal silicon carbide kekahi o kona mau pono. Ma muli o kona ʻano kristal kū hoʻokahi, he kiʻekiʻe ke alakaʻi wela o ka waʻa kristal silicon carbide a hiki ke alakaʻi koke i ka wela a mālama i ka hoʻolaha like ʻana o ka mahana. ʻO kēia ka mea e hoʻohana nui ʻia ai i ka mālama wela, ka hana semiconductor a me nā ʻoihana ʻē aʻe.

I ka pōkole, ʻo ka waʻa kristal silicon carbide me kona kūpaʻa wela maikaʻi loa, ke kūpaʻa i ka pala a me ka conductivity thermal, lilo ia i mea kūpono i ke kaiapuni wela kiʻekiʻe. Loaʻa iā ia kahi ākea ākea, hiki ke hoʻokō i nā pono o nā kaʻina hana wela kiʻekiʻe like ʻole, a he nui ka hiki ke hoʻomohala ʻia i ka wā e hiki mai ana.