Nano Hafnium carbide HfC pauka

1. Nā hiʻohiʻona o nā mea hafnium carbide:

(1) ʻO ka Hafnium carbide (HfC) he pauka hina-ʻeleʻele me kahi hoʻolālā cubic i waena o ka maka a me kahi helu heheʻe kiʻekiʻe loa (3890°C). He mea ia me kahi helu hehee kiʻekiʻe i loko o kahi pūhui hoʻokahi i ʻike ʻia a he wahi hoʻoheheʻe kiʻekiʻe me ka hoʻoheheʻe ʻana i ka crucible lining. Maikaʻi mea.

(2) Ma waena o nā mea i ʻike ʻia, ʻo ka hafnium alloy (Ta4HfC5) me ka helu hoʻoheheʻe kiʻekiʻe ʻo ia ka hafnium alloy (Ta4HfC5). ʻO ka hafnium alloy material o 1 ʻāpana o ka hafnium carbide a me 4 mau ʻāpana o ka tantalum carbide he wahi hoʻoheheʻe o 4215 ℃, no laila hiki ke hoʻohana ʻia ma ke ʻano he mea hana ma nā mīkini jet a me daodan.

(3) Hafnium carbide he kiʻekiʻe elastic coefficient o ka moa, maikaʻi uila a me ka thermal conductivity, liʻiliʻi thermal hoʻonui coefficient a me ka hopena maikaʻi. He kūpono ia no ke kahua o nā mea nozzle rocket a he mea cermet koʻikoʻi nō hoʻi.

2， Ka helu o nā mea hafnium carbide

3. Hoʻohana i ka hafnium carbide:

(1) ʻO ka Hafnium carbide kahi mea wela kiʻekiʻe, yanghua resistant ceramic material, nona nā pono o ka uila maikaʻi a me ka thermal conductivity a me ka hoʻonui haʻahaʻa haʻahaʻa. He kūpono ʻo Hafnium carbide no ka hana ʻana i nā ʻāpana koʻikoʻi e like me nā rocket nozzles a me nā ʻēheu mua, a hoʻohana nui ʻia i ka hangtian, nā ʻoihana ʻenehana a me nā māla ʻē aʻe.

(2) He kiʻekiʻe ka paʻakikī o ka Hafnium carbide, hiki ke hoʻohana ʻia e like me ka cemented carbide additives, hiki ke hana i kahi hopena paʻa me nā pūhui he nui (e like me ZrC, TaC, etc.), a ua hoʻohana nui ʻia i ke kahua o ka ʻoki ʻana i nā mea hana a me nā mold.

(3) Hafnium carbide he kiʻekiʻe elastic coefficient, maikaʻi uila a me ka thermal conductivity, liʻiliʻi thermal hoʻonui coefficient a me ka hopena maikaʻi. He kūpono ia no nā mea nozzle rocket a hiki ke hoʻohana ʻia i ka cone ihu o nā rockets. Loaʻa iā ia nā noi koʻikoʻi ma ke kahua aerospace. Aia kekahi mau noi koʻikoʻi i nā nozzles, nā linings kūpaʻa kiʻekiʻe, nā electrodes no ka arc a i ʻole electrolysis.

(4) Loaʻa i ka Hafnium carbide ka paʻa paʻa paʻa, ka pale kemika, a hiki ke kūpono no ka hoʻohana ʻana i nā wahi wela kiʻekiʻe. Eia hou, hiki i ka hoʻoheheʻe ʻana i kahi kiʻiʻoniʻoni HfC ma ka ʻili o ka carbon nanotube cathode hiki ke hoʻomaikaʻi maikaʻi i kāna hana hoʻokuʻu kahua.

(5) Hiki i ka hoʻohui ʻana o ka hafnium carbide i nā composites C / C ke hoʻomaikaʻi i kona kūpaʻa ablation. Loaʻa i ka Hafnium carbide nā waiwai kino a me nā kemika maikaʻi loa, e hoʻohana nui ʻia i nā mea wela kiʻekiʻe chao o kēia manawa.