Niobium Carbide pauka, NbC

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Niobium Carbide pauka, NbC

nunui-pae pālolo kekahi o nā maka mea o ka nunui-pae pālolo pono. Hoʻohana pinepine ʻia nā mea pālolo maha i ka paʻakikī, kiʻekiʻe smelting point, kūpaʻa kemika maikaʻi a me ka conductivity Hoʻohana ʻia ia i nā ʻāpana pale-pale, nā mea ʻoki a me nā uila


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Niobium carbide
Hoʻohālikelike Nine: Nbcnt: 3500. C
Kahi paila: 4300. C
Ka nui: 7. 6g / ml ma 25 "C (it)
Pepa: ferrous metala pauka ʻO ka hoʻopili ʻana i nā mea hoʻohui (1) ʻo nā kinikini maha-ʻāpana kekahi o nā mea theaw o nā mea pālolo maha-ʻāpana. Hoʻohana ʻia nā ceramicmaterial multi-phase i hana ʻia i wahi pinepine, paʻa paʻa maikaʻi a me ka lawe ʻana Hoʻohana ʻia ia i nā ʻāpana pale-pale, nā ʻoki a me nā electrode (2) ʻaʻole hiki ke hoʻohana ʻia ka carbide cemented i ka ashibitor o ka ulu ʻana o ka palaoa karbida i hoʻoheheʻe ʻia, akā hiki nō hoʻi ke hana i kahi ʻekolu i hoʻoneʻe ʻia me WC a me Co pū me nā karbida ʻē aʻe, kahi e hoʻomaikaʻi ai i ka paakiki mehana a me ke kūwela ʻana o ka hopena Semedcarbide, ka wela a me ke kūpaʻa o ke kaomi. Ma muli o ka loaʻa ʻana o ka niobium carbide i nā pono o ka hoʻomaikaʻi ʻana i ka paʻakikī o ke kinikini a me ka hoʻomaikaʻi ʻana i ka haʻi o ke kinikini, hiki ke hoʻohana ʻia e hoʻomākaukau i nā mea paahana carbide me nā hana maikaʻi loa. 3) ʻO ke kaʻina niobium carbidehard paʻakikī o ka electrode surfacing e komo i ka hanana o ka surfacinglayer, no laila ʻoi aku ka maikaʻi o ka pale lole pale pale i ka papa kuʻihao, a hoʻomaikaʻi maikaʻi ʻia ka pale lole. ʻO ke kinikini kūpale o kēia electrodewelding he 1.2-1.8 mau manawa ke kiʻekiʻe ma mua o ke pio kila 45 (HRC50) a me 2.43.6 mau manawa ke kiʻekiʻe ma mua o ka paʻa paʻa ʻaʻano Fe-cr-cb. I ka manawa like, ʻaʻole koi ka pale surfaced surfaced i ka preheating ke hoʻohui .a hiki ke heʻe i ka papa o ka workpiece. Hiki i ka mea liʻiliʻi liʻiliʻi ma luna o ke alo ke hoʻokuʻu i ke koʻikoʻi o ka papa heʻe ʻeʻe a ʻaʻole hoʻi e hoʻolaha i nā mea kumu. d Ke hoʻoikaika nei i ke kaʻina Hoʻohui i ka nui o ka nui o ka niobium carbide i ke kaʻina hana kila hiki ke loaʻa iā ʻoe ka hopena o ka hoʻoulu ʻana o ka ua a me ka hoʻoikaika ʻana i ka aniani, a laila e hoʻonui ai i nā pono mechanical o ka kila. (4) Hoʻohana ʻia nā Aerospacecomponents ma ke ʻano he puke kemika no ka hoʻomākaukau ʻana o ka equipme manyaerospace

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Niobium carbide
CAS (12069-94-2
EINECS. 235-117-8
waiwai physico-kemika
ʻO Niobium carbide he aniani cubic ʻōmaʻomaʻo me ka hinuhinu metallic a no ka ʻōnaehana sodium chloride cubic aniani.
Ka mānoanoa pili 8.47, mau lattice A = 0.447nm,
ʻO 3500 point kiko hoʻoheheʻe. Microhardness> 23.5 Gpa (> 2400 kg / mm2), ʻoi aku ka paʻakikī ma mua o ka corundum. 338000 N / he modulus lahilahi, coefficient hoʻonui hoʻonui o 6.65 * 10 ^ (6) / K, ka conductivity mehana o 14 w / (m K), e hoʻoulu ai i ka wela - 140.7 kJ / mol, ka mana wela kikoʻī o 36.8 J / (mol · K), ka mea pale o 35 mu Ω · cm.
ʻAʻole hiki ke hoʻoheheʻe ʻia i loko o ka waikawa hydrochloric wela a me ke anuanu, ʻo ka waikawa sulfuric, ka waikawa nitric, hiki ke hoʻoheheʻe ʻia i ka waikawa hydrofluoric wela a me ka hopena i hui pū ʻia me ka waikawa nitric. Kū paʻa ma 1000 ~ 1100 ℃ a hoʻoweliweli ʻia i ka niobium pentoxide ma luna o 1100 ℃. Maʻalahi ke hoʻopili ʻia ʻo Niobium carbide i loko o ka titanium carbide, zirconium carbide, tungsten carbide a me nā mea hoʻohui ʻē aʻe, a hui pū e hana i kahi hui like sologeneous paʻa. Kahi hoʻoheheʻe: 3500 ℃, nuʻa: 7.6g / cm (25 ℃) hoʻohana
Ma ke ʻano he mea hoʻohui o ke kinikini paʻa paʻa, he ʻāpana ia o ka hopena paʻa paʻa paʻa kolnide a me ka quaternary carbide, e like me ka ʻōnaehana ternary WC-NBC-C. Hiki nō hoʻi ke hana i nā mea hoʻonani poni.
Hoʻokumu ʻia nā Polycarbides ma luna ona, e like me nā ʻōnaehana ternary NBC-WC-C, i hiki ke hoʻohana ʻia me he mea lā no ka hoʻopili ʻana i nā pono uila
ʻO Niobium carbide (NbC) kahi aniani ʻōmaʻomaʻo ʻōmaʻomaʻo me ka luster metallic a no ka ʻōnaehana sodium chloride cubic aniani. He ʻano ia o ke kiko hoʻoheheʻe kiʻekiʻe, mea paakiki kiʻekiʻe, hoʻohana ākea ʻia i ka mea kiʻekiʻe wela wela a me nā mea hoʻohui paʻa paʻa paʻa.
Ma ke ʻano he mea hoʻohui hoʻohui karbida, ʻo ia ka ʻāpana o ka hopena paʻa paʻa paʻa kolnide a me ka quaternary carbide, e like me ka ʻōnaehana kūʻina ʻo WC-NBC-C. Hiki nō hoʻi ke hana i nā mea hoʻonani poni.
He kūpaʻa kemika maikaʻi a Niobium carbide a me ka hana wela kiʻekiʻe. ʻAʻole hiki ke hoʻoheheʻe ʻia i loko o ka waikawa hydrochloric wela a me ke anuanu, ʻo ka sulfuric acid, ka waikawa nitric, hiki ke hoʻoheheʻe ʻia i ka waikawa hydrofluoric wela a me ka waikawa nitric acid i hui pū ʻia. Hoʻohui ʻia ka hui ʻana i loko o ka titanium carbide, zirconium carbide, tungsten carbide a me nā mea hoʻohui ʻē aʻe, a hana pū ʻia ka hui. Kū paʻa ma 1000-1100 ℃ a wikiwiki i ka oxidized i niobium pentoxide ma luna o 1100 ℃. ʻO ka maʻamau, piha ia i loko o nā hue ea a i ʻole ʻeke foil alumini i loko o ka pahu.

(2) Hoʻohana huahana: Noi i nā pono luaahi: - pālua pālua: ʻo kekahi o nā mea maka o nā mea pālua pālua, i hana ʻia e nā mea niobium carbide duplex pālolo me ka ʻoʻoleʻa kiʻekiʻe, wahi hoʻoheheʻe kiʻekiʻe, kūpaʻa kemika maikaʻi a me ka conductivity uila, pinepine. hoʻohana ʻia i nā ʻāpana pale ʻaukā, nā mea hana ʻoki a karbida i hoʻoliʻiliʻi a me nā wahi uila: ʻaʻole hiki ke hoʻohana ʻia ma ke ʻano he mea hoʻoheheʻe ulu palaoa karbida, akā me nā karbida ʻē aʻe i hana ʻia ma waho o ka WC a me ke kolu dispersoid, e hoʻomaikaʻi maikaʻi i ka paakiki wela o ka carbide a me ka thermal. ʻO ke kūpikipiki kūpilikiʻi i ka hiki ke pale i ke kūpaʻa ʻana o ka ʻoiaʻiʻoNobium carbide me ka hoʻomaikaʻi ʻana i ka paʻakikī o ke kinikini a me ka hoʻomaikaʻi ʻana i ka paʻakikī hakina o ke kinikini, a pēlā aku, no laila hiki ke hoʻohana ʻia no ka hoʻomākaukau ʻana o ka hana ʻoki a nā mea pono hana ʻoki carbide sima a hiki ke hana ʻia i loko o ka niobium carbide. poni hana poni - ka uila uila, ka niobium paʻa paʻa paakiki paʻahana i loko o ka hoʻonohonoho papa hardfacing, e hana i ka weldin Loaʻa ka pale g i ka iwi iwi pale maikaʻi, kūpono ke hoʻomaikaʻi i ka uhi electrode Wear-resistant resistence, kona pale pale ma mua o ke kinai ʻia o 45 # kila (HRC50) 1.2 1.8 mau manawa ke kiʻekiʻe, ma mua o ka Fe - Cr - C - B e holo nei -ʻoi aku ma kahi o 2.4 a 3.6 mau manawa ke kūpaʻa Welds i ka manawa like, pale pale pale pale pale pale me ka ʻole o ka preheating, loaʻa i ka hana o ka papa hana, hiki i nā ʻāpana liʻiliʻi ke hoʻokuʻu i ka pae o ka ʻili a me ka ʻole o ka hoʻolaha ʻana i loko o ka mākua makua a me ka hoʻoikaika ikaika i ka hao. i ke kaʻina hana o ka hana kila ʻana i ka niobium carbide, hiki ke hoʻokō i ka hopena o ka hoʻoulu ʻana o ka ua a me ka hoʻomaikaʻi ʻana i ka palaoa, i mea e hoʻomaikaʻi ai i nā pono mechanical o ke kila, nā ʻāpana mokulele: hoʻohana ʻia no ka turbine rotor pahi mīkini noze jet vane lining a me ka hoʻolālā reactor nuklea a nā lako hana ʻē aʻe he nui ʻē aʻe i hoʻomākaukau i nā mea i ka noi o nā mea uhi: - make kapa kila kila: niobi um karbida e like me nā karbida metala, loaʻa ka nui o ka ikaika o ka wela a me ke kūpaʻa abrasion no laila ua noi ʻia i ke kila e hiki ke hoʻomaikaʻi i ka pale o ka pale make - pale hana ʻāpana metala: i loko o ka metric matrix composite niobium carbide ʻili o ka hana, e hana i kāna ua hoʻonui nui ʻia ka paʻakikī paʻakikī, hiki ke hoʻokō iā HV2800 ma luna, i ka manawa like, hoʻomaikaʻi i ka mahana hana o ka workpiece density a me ka hoʻonohonoho ʻana, i mea e hoʻolōʻihi ai i kāna ola lawelawe e ke kaʻina hana waiho waiū kemikala hiki ke hoʻomaopopo i ka uhi niobium carbide i ka papa o kiola i nā apo piston hao, ka pena ʻana a me nā mea pono i ka hui pū me ka ikaika; ʻO kēia apo piston ke komo nei he pute maikaʻi ke ʻano o ka ʻeke, a ʻo nā mea maikaʻi o ka paʻakikī kiʻekiʻe ʻelua, hiki ke hoʻoliʻiliʻi me ka ʻole o ka lubrication medium a me ka coefficient o ka wīwī i ka wā o ka diesel kaʻaila ʻaila lubrication, hoʻomaikaʻi nui i ka pale o ke komo, hiki ke hōʻemi i ka nalo ʻana o ka ʻenekini diesel i ka manawa like hoʻomaikaʻi i ka hana ʻenekini diesel - nā niobium carbide uhi ʻē aʻe: ka spacecraft o nā ʻāpana wela kiʻekiʻe e hoʻohana ana i ka uhi ʻana o ka niobium carbide, hiki ke hoʻomaikaʻi maikaʻi i kona ola lawelawe i ka ʻoihana uila, nā mea hana uila uila e hoʻohana ana i ka cobalt ultrafine i piha me ka niobium carbide, e hoʻomaikaʻi i ka helu o ka pāhawewe ma E hoʻoliʻiliʻi ka mahana i ka maka aha a hoʻoliʻiliʻi i ka hoʻokuʻu ʻana o ka uila i kahi hopena koʻikoʻi, i mea e hoʻolōʻihi ai i ke ola o nā paipu uila i ke noi ʻana o ka hana niobium metala: hoʻohana ʻia ka hana hoʻoliʻiliʻi nui e hana i nā niobium metala, ka hoʻopuka o ka niobium carbide i hoʻohana mua ʻia ma ke ʻano he reductant, a me ka niobium pentoxide i hana ʻia me ka niobium metala mānoanoa, i hana ʻia no ka hoʻomaʻemaʻe ʻana i ka hoʻohui kiʻekiʻe o ka metala maʻemaʻe, hiki i ka niobium carbide ke kuhikuhi pololei i ka hoʻoliʻiliʻi e hana i ka niobium niobium pentoxide.

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