ʻO ka 3000°C Ablative Ceramic Coating Hou i hoʻomohala ʻia - Multi-boron-containing Single-phase Carbide

(He 3000°C Ablative Ceramic Coating Hou i hoʻomohala ʻia - Multi-boron-containing Single-phase Carbide )

ʻO Boron carbide (ʻike ʻia ʻo ka daimana ʻeleʻele) he ʻano molekala B4C. ʻO ka mea maʻamau he hina a me ka pauka. Hoʻohana ʻia ia i ka pale kino kino, ka pahu pahu, a me nā noi ʻoihana ʻē aʻe. Loaʻa iā ia ka paʻakikī Mohs 9.3.
ʻO ka nui o nā hoʻokolohua i alakaʻi i ka hoʻomohala ʻana i kahi uhi seramika hou e Huang Boyun, Academician ma ka National Laboratory of Powder Metallurgy o Central South University. Hiki i kēia holomua ke wehe i ka puka i nā kaʻa hypersonic.

Ua ʻōlelo ʻo Professor Xiong Xiang o ka Institute of Powder Metallurgy ma Central South University, ʻo ka lele hypersonic ka wikiwiki like a ʻoi aku paha ma mua o ʻelima mau manawa o ka wikiwiki o ke kani. ʻO ia hoʻi, he 6,120 mau kilomika i hoʻokahi hola. Inā hiki i nā mea hoʻolālā nui o ka mokulele ke kū i ka hopena o ka ea a me ka hopena wela, ʻo ka manawa lele mai Beijing a New York e emi iho ma mua o 2 mau hola. . Hāʻawi ʻia ka pale ʻoi aku ka palekana o ka Central South University i nā mea hoʻohui. ʻO ka mua o ka honua holoʻokoʻa quaternary, boron-containing, carbide ultra-high temperature ceramic material ua synthesized. He kūpono kēia uhi no ka "fusion" o nā mea kalapona kalapona. ʻO ka noiʻi ʻana i nā mea i hui pū ʻia i nā ʻōnaehana hui binary ke kumu nui o ke kahua mea hou. ʻO ka hoʻohana kūleʻa ʻana o kēia mau mea i nā noi hypersonic e pōmaikaʻi nui i kā lākou hoʻomohala ʻana.

Hana ʻia kahi mea kalapona i hoʻololi ʻia i uhi ʻia me ka quaternary-boron-containing single phase carbide mai ka zirconium titanium carbon, carbon, a me nā mea boron ʻē aʻe. Hoʻokomo ʻia ka māhele multi-ceramic i loko o ka hui kalapona porous/carbon ma o ke kaʻina hana infiltration. Hoʻohui ia i ka adaptability kiʻekiʻe o ka carbide a me nā waiwai antioxidation. ʻOi aku ka maikaʻi o nā composites a me nā uhi i ke ʻano o ka ablation a me ke kūpaʻa haʻalulu. Hiki i ka ceramic oxide ke kū i nā wela kiʻekiʻe o 3000 ° C. Pākuʻi pohō ʻana.

Hoʻohui ʻia ka ceramic wela kiʻekiʻe kiʻekiʻe i ka hiki ke hoʻololi ʻia mai ka carbide me nā waiwai anti-oxidation. ʻO kēia ka mea e lilo ai lākou i mea nui o nā kaʻa hypersonic. Ua ʻōlelo ʻo Xiong Xiang ʻo ia nā ʻāpana ʻoi loa.

Ua paʻi ʻo Nature Communications i nā hopena noiʻi mai ka hui hoʻomohala ma Iune 15th. ʻO ka ʻāpana mua e hoʻopau i ka thesis ka State Key Laboratory of Powder Metallurgy o Central South University. ʻO Zeng Yi lāua ʻo Professor Xiong Xiang ka mea mua i kākau. ʻO Kauka Xiong Xiang ka mea kākau kumu. ʻO ke Kulanui o Manchester (UK) ka mea mua i kālailai a ʻike i ka mea.

Ma hope o ka paʻi ʻana, ua loaʻa ka manaʻo nui o ka ʻatikala mai nā pōʻai kula a puni ka honua a me ka media. I loko o ʻekolu lā, ua hoʻoiho ʻia ka ʻatikala ma mua o 5,000 mau manawa. Ua hoʻoiho ʻia nā ʻatikala like ma waena o 300 a 900 mau manawa. Ua uhi ʻia ka noiʻi ʻana e ka lehulehu media mainstream, me ka British Daily Mail a me The Economist. ʻO ka United States Yahoo a me Public Machinery a me ka Russian Satellite News Agency a me nā ʻoihana hoʻonaʻauao mana. . Ua ʻōlelo ka mea loiloi o Nature Newsletter, "ʻO nā hopena noiʻi ma luna nei e hoʻāla i ka hoihoi a me ka hoihoi i ka hoʻopili ʻana i nā ʻōnaehana material quaternary i ka hypersonic force, no ka mea he ʻōnaehana waiwai nui kēia."

Me ke kōkua o ka National 863 a me 973 Foundations, Professor Chang Xiang (he haumana mai ka muliwai ʻo Yangtze), ua hana ka hui me kahi pale antioxidation no nā hui kalapona/carbon ma kahi mahana-kiʻekiʻe (1600 ° C). Ua hana ʻia kēia me ke kākoʻo e ka National Natural Science Foundation. Pono ʻoe e ʻimi i kahi ʻāpana seramika ultra-kiʻekiʻe loa i loaʻa ke kūpaʻa kūʻokoʻa. Ua nānā ʻia ka ʻōnaehana waiwai no kēia mau mea: titanium carbide; strontium carbide; zirconium boride; tantalum carbide. Ua hoʻokomo pū ʻia he mau haneli mau mea wela kiʻekiʻe. He 15 mau makahiki e hoʻokō ai i ka holomua o ka hoʻomohala ʻana i nā uhi seramika e kū nei i ka ablation ma nā wela kiʻekiʻe loa (3000°C).

ʻO Luoyang Tech Co., Ltd, he mea hana ʻo Boride Powder me ka ʻoi aku o 12 mau makahiki o ka ʻike i ka hoʻomohala ʻana i nā huahana kemika a me ka noiʻi. Inā ʻoe e ʻimi nei i ka Boride Powder o ke kūlana kiʻekiʻe, e ʻoluʻolu e kelepona mai iā mākou.

(He 3000°C Ablative Ceramic Coating Hou i hoʻomohala ʻia - Multi-boron-containing Single-phase Carbide )