Ua hoʻomohala kekahi pūʻulu ʻepekema mai NUST MISIS i kahi mea me ka helu heheʻe kiʻekiʻe loa ma waena o nā pūhui i ʻike ʻia i kēia manawa. Ma muli o ka hui like ʻole o ke kino, mechanical a me nā mea wela, ua hoʻohiki ʻia ka mea no ka hoʻohana ʻana i nā ʻāpana wela loa o ka mokulele, e like me nā ihu ihu, nā ʻenekini jet a me nā ʻaoʻao mua o nā ʻēheu e hana ana i nā mahana ma luna o 2000 degere C. Ua paʻi ʻia nā hopena ma Ceramics International.

Nui nā keʻena ākea ākea (NASA, ESA, a me nā keʻena o Iapana,Kinaa me India) ke hoʻomohala nei i nā mokulele mokulele hiki ke hoʻohana hou ʻia, e hōʻemi nui ana i ke kumukūʻai o ka lawe ʻana i nā kānaka a me nā ukana i ka orbit, a me ka hōʻemi ʻana i ka manawa ma waena o nā mokulele.

"I kēia manawa, ua loaʻa nā hopena koʻikoʻi i ka hoʻomohala ʻana o ia mau mea hana. No ka laʻana, ʻo ka hoʻemi ʻana i ka radius pōʻai o nā ʻaoʻao ʻoi mua o nā ʻēheu i kekahi mau kenimika e alakaʻi i ka piʻi nui ʻana o ka hāpai a me ka maneuverability, a me ka hōʻemi ʻana i ka huki aerodynamic. Eia naʻe, i ka puka ʻana i ka lewa a komo hou i loko, ma ka ʻili o nā ʻēheu o ka mokulele mokulele, hiki ke ʻike ʻia nā mahana ma kahi o 2000 degere C, a hiki i 4000 degere C ma ka ʻaoʻao loa. No laila, i ka wā e pili ana i ia mokulele, aia kahi nīnau e pili ana i ka hana ʻana a me ka hoʻomohala ʻana i nā mea hou e hiki ke hana i kēlā me kēia wela kiʻekiʻe, "wahi a Dmitry Moskovskikh, ke poʻo o NUST MISIS Center for Constructional Ceramic Materials.

I loko o nā hanana hou, ʻo ka pahuhopu o nā ʻepekema ʻo ia ka hana ʻana i kahi mea me ka helu hoʻoheheʻe kiʻekiʻe a me nā waiwai mechanical kiʻekiʻe. Ua koho ʻia ka ʻōnaehana hafnium-carbon-nitrogen triple, hafnium carbonitride (Hf-CN), e like me ka wānana mua ʻana o nā ʻepekema mai Brown University (US) e loaʻa i ka hafnium carbonitride kahi conductivity thermal kiʻekiʻe a kūʻē i ka oxidation, a me ka hoʻoheheʻe kiʻekiʻe. kiko ma waena o nā pūhui i ʻike ʻia (ma kahi o 4200 degere C).

Ke hoʻohana nei i ke ʻano o ka hoʻolaha ʻana iā ia iho i ka synthesis wela kiʻekiʻe, ua loaʻa i nā ʻepekema NUSTMISIS HfC0.5N0.35, (hafnium carbonitride) kokoke i ka haku mele, me ka paʻakikī kiʻekiʻe o 21.3 GPa, ʻoi aku ka kiʻekiʻe ma mua o nā mea hoʻohiki hou. e like me ZrB2/SiC (20.9 GPa) a me HfB2/SiC/TaSi2 (18.1 GPa).

"He mea paʻakikī ke ana i ka helu heheʻe o kahi mea inā ʻoi aku ma mua o 4000 degere С. No laila, ua hoʻoholo mākou e hoʻohālikelike i nā mahana hoʻoheheʻe o ka hui synthesized a me ka champion mua, hafnium carbide. No ka hana ʻana i kēia, kau mākou i nā laʻana HFC a me HfCN i hoʻopaʻa ʻia ma luna o kahi pā graphite i hoʻohālikelike ʻia e like me ka dumbbell, a uhi ʻia i luna me kahi pā like e pale aku ai i ka wela, "wahi a Veronika Buinevich, NUST MISIS haumāna puka puka.

A laila, hoʻopili lākou iā ia i kahi pākaukau me ka hoʻohana ʻananā electrodes molybdenum. Hana ʻia nā hoʻāʻo a pau i kahi hohonuhoʻomāmā. Ma muli o ka ʻokoʻa o ka ʻāpana ʻāpana o nā papa graphite, ua hiki ke kiʻekiʻe o ka mahana ma ka ʻāpana haiki. ʻO nā hopena o ka hoʻomehana like ʻana o ka mea hou, carbonitride, a me ka hafnium carbide, ua hōʻike ʻia he kiʻekiʻe ka helu heheʻe o ka carbonitride ma mua o ka hafnium carbide.

Eia naʻe, i kēia manawa, ʻoi aku ka nui o ka helu heheʻe o ka mea hou ma luna o 4000 degere C, a ʻaʻole hiki ke hoʻoholo pololei ʻia i loko o ka hale hana. I ka wā e hiki mai ana, hoʻolālā ka hui e hana i nā hoʻokolohua ma ke ana ʻana i ka wela hoʻoheheʻe ʻana e ka pyrometry wela kiʻekiʻe me ka hoʻohana ʻana i ka laser a i ʻole ke kūpaʻa uila. Hoʻolālā pū lākou e aʻo i ka hana o ka hafnium carbonitride i loaʻa i nā kūlana hypersonic, e kūpono ana no ka noi hou ʻana i ka ʻoihana aerospace.