Hom Niobium

Metallurgical Niobium hmoov

Niobium hmoov feem ntau tau txais los ntawm cov hmoov hlau metallurgy, nrog cov tsos grey tsaus, rau kev ua cov khoom siv raw thiab tsim cov vuam rods, thiab lwm yam. Raws li qhov sib txawv ntawm cov khoom, FNb-1 thiab FNb-2 tau muab faib ua peb qib. Raws li qhov sib txawv ntawm cov khoom, niobium hmoov muab faib ua peb qib: FNb-1, FNb-2 thiab FNb-3. FNb-1 thiab FNb-2 niobium hmoov yuav tsum dhau los ntawm 150um (100 mesh) sieve, thiab FNb-3 niobium hmoov yuav tsum dhau los ntawm 180um (80 mesh) sieve.

Niobium-zirconium alloys

Alloys uas muaj hlau zirconium ntxiv rau hlau niobium. Zirconium nyob rau hauv niobium alloy feem ntau tshwm sim nyob rau hauv cov khoom siv tshuaj, thaum khaws cov kab thiab cov pa roj carbon monoxide los yog ntxiv cov pa roj carbon monoxide, muaj me me ntawm carbide thiab oxide diffuse nag lossis daus, yog li niobium-zirconium alloy muaj lub zog siab thiab cov yas zoo. kev ua tau zoo, kev ua haujlwm zoo rau oxygen thiab alkali corrosion kuj.

Niobium oxide

Niobium oxide tau los ntawm cov kua-kua extraction, dawb los yog lub teeb daj hmoov, rau zus tau tej cov niobium hmoov, niobium strips thiab ceramic capacitors. Raws li cov kev xav tau ntawm kev siv thiab cov tshuaj sib txawv, cov khoom raug muab faib ua FNb2O5-1, FNb2O5-2 thiab FNb2O5-3.

FNb2O5-3 qib.

Tantalum thiab Niobium

Muab lawv ua ke los qhia yog tsim nyog, vim hais tias lawv nyob rau hauv lub sij hawm ntawm lub ntsiab lus ntawm tib tsev neeg, lub cev thiab tshuaj muaj pes tsawg leeg zoo sib xws, thiab feem ntau "inseparable", nyob rau hauv lub ntuj ntiaj teb no nrog ua ke, tiag tiag yog ib tug khub ntawm exquisite "twin brother". Qhov tseeb, thaum tib neeg thawj zaug pom niobium thiab tantalum nyob rau hauv lub xyoo pua puv 19, lawv xav tias lawv yog tib lub caij. Nws tsuas yog kwv yees li plaub caug-ob xyoos tom qab, thaum lawv tau sib cais thawj zaug, nws tau pom tseeb tias lawv yog ob hom hlau sib txawv. Niobium thiab tantalum, zoo li tungsten thiab molybdenum, yog cov hlau tsis tshua muaj siab melting point, thiab muaj ntau yam zoo sib xws hauv lawv cov khoom thiab kev siv.

Txij li thaum lawv raug hu ua cov hlau tsis tshua muaj siab melting point, cov yam ntxwv tseem ceeb ntawm niobium thiab tantalum yog cov cua sov ua haujlwm. Lawv qhov melting point txog li 2,400 degrees Celsius thiab ze li ntawm 3, 000 degrees Celsius, tsis yog hais txog qhov dav dav hluav taws kub hnyiab tau lawv, uas yog, cov nplaim taws hauv cov hluav taws kub hauv hiav txwv ntawm cov nplaim taws tsis tuaj yeem pab lawv. Tsis muaj qhov xav tsis thoob hauv qee qhov chaw kub thiab kub kub, tshwj xeeb tshaj yog kev tsim khoom ntawm ntau tshaj 1,600 degrees ntawm lub tshuab nqus tsev cua sov, tantalum hlau yog cov khoom siv zoo heev.

Cov khoom zoo heev ntawm ib qho hlau feem ntau tuaj yeem "hloov" mus rau lwm qhov. Kev siv cov niobium ua cov khoom sib txuas ntxiv rau cov hlau tuaj yeem ua rau lub zog kub kub ntawm cov hlau thiab txhim kho kev ua haujlwm. Niobium, tantalum thiab tungsten, molybdenum, vanadium, npib tsib xee, cobalt thiab kev sib koom tes ntawm cov hlau, kom tau txais "kub muaj zog alloy", tuaj yeem siv los ua supersonic dav hlau dav hlau thiab foob pob ua ntxaij, cuaj luaj thiab lwm yam khoom siv. Cov kws tshawb fawb hauv kev tsim cov khoom siv hluav taws xob kub tshiab, tau pib tig nws cov xim rau niobium, tantalum; ntau qhov kub thiab txias, muaj zog alloys muaj cov khub niam txiv no tuaj koom.

Niobium, tantalum nws tus kheej yog tenacious heev, lawv cov carbides muaj peev xwm ntau dua, cov yam ntxwv no thiab tungsten, molybdenum tsis txawv. Nrog niobium thiab tantalum carbide li matrix ua los ntawm cemented carbide, muaj lub zog siab thiab siab, hnav thiab corrosion kuj. Ntawm tag nrho cov tebchaw nyuaj, tantalum carbide muaj qhov nyuaj tshaj plaws. Cov cuab yeej txiav ua los ntawm tantalum carbide cemented carbide tuaj yeem tiv taus qhov kub thiab txias hauv qab 3,800 degrees, thiab lawv cov hardness yog piv rau cov pob zeb diamond, nrog lub neej kev pab ntev dua li tungsten carbide.