Niobium Ntawv Nyiaj Rau Lub Zog Nuclear Engineering

Qhov ntau lawm ntawm niobium ntawv ci rau lub zog nuclear engineering pib nrog lub suab thiab precision dov ntawm siab {{purity niobium hlau. Niobium raw khoom yog purified kom ntau dua los yog sib npaug ntawm hluav taws xob nqaj melting (EBM), nrog kev tswj hwm nruj me ntsis xws li oxygen thiab nitrogen. Tom qab, cov ntawv ci thickness yog txo qis rau 0.1-1.0mm los ntawm ntau qhov kev hla (800-1 Qib Annealing thiab cov ntaub so ntswg thaum ua tiav.
To meet the requirements of the nuclear engineering environment, the surface of niobium foil needs to be treated with a silicide coating (such as chemical vapor deposition NbSi ₂ coating) to enhance its resistance to high temperature oxidation and liquid metal corrosion. Finally, irradiation tests (neutron dose>5 DPA) thiab corrosion kev ntsuam xyuas tau ua los ua kom ua raws li cov qauv nuclear (xws li ASTM B393).

Niobium ntawv ci rau lub zog nuclear engineering nuclear kev siv tau kom muaj cov yam ntxwv hauv qab no kom tau raws li cov kev yuav tsum muaj ntawm nuclear lub zog hluav taws xob:
1, hluav taws xob hluav taws xob tsis kam thiab kev ua haujlwm nuclear
Niobium foil must have an extremely low neutron absorption cross section (1.1 bar) to avoid neutron loss and ensure nuclear reaction efficiency; At the same time, it is necessary to tolerate high-dose radiation (>5 dpa) kom tiv thaiv hluav taws xob o thiab embrittlement. Cov xeeb ceem no ua rau nws haum rau cov ntaub pua ntawm nuclear reactor txheej thiab ntshav thaiv cov kab ke ntawm cov fusion thiab ntshav erosion, ua kom muaj kev ncaj ncees ntawm cov qauv kev ncaj ncees.
2, Kev kub siab corrosion tsis kam thiab oxidation tsis kam
Niobium ntawv ci xav tau kom walland kev xeb ntawm cov kua roj (xws li sodium thiab oxidation tsis muaj zog ntawm tsawg dua li ntawm ib qho chaw nyob sab nraud (xws li nbsi ₂). Cov xeeb ceem no ua rau nws haum rau siv los ua cov khoom siv hluav taws xob hauv plab zom zaws kom tiv thaiv cov khoom siv tsis yooj yim.
3, thermal tshuab kev ruaj khov thiab sealing kev ua tau
Niobium ntawv ci yuav tsum tau tswj cov cav loj dua (1000℃C lub zog ntau dua los yog sib npaug rau 100 MPA ntawm qhov kub siab, thaum tseem muaj lub tshuab hluav taws xob zoo. Cov yeeb yaj kiab no siv tau rau cov hluav taws xob shoofting ntim cov khoom siv nuclear ntawm Nuclear nkim cov thawv ntim khoom ntawm nuclear nkim sij hawm thiab cov kev ruaj khov ruaj khov thaum lub sij hawm ntev}.
4, cov khoom siv purity thiab kev ua haujlwm sib raug zoo
Lub purity ntawm niobium ntawv ci yuav tsum muaj ntau dua los yog sib npaug ntawm 99.95%, thiab cov ntsiab lus ntawm Alpha emitting hais xws li Uranium thiab Thorium yuav tsum ua nruj me ntsis tswj (<0.001 ppm) to avoid radioactive contamination. In addition, it needs to be compatible with the insulation requirements of superconducting magnets (such as low-temperature superconducting environments in fusion devices) and thermal management functions (thermal conductivity of 53.7 W/m · K). These characteristics enable it to be used for superconducting magnet spacers and concentrated solar thermal absorbers in fusion reactors, achieving multi scenario functional adaptation.

Niobium ntawv ci rau lub zog nuclear engineering ua kom muaj cov khoom tseem ceeb xws li cov khoom muaj zog ntawm cov hluav taws xob, thiab cua sov ua kom tsis muaj zog, hluav taws xob tsis kam, thiab muaj kev huv siab. Nws muab siab dua - Kev ua tau cov kev daws teeb meem rau kev txhim kho lub zog nuclear ntawm kev nyab xeeb thiab muaj txiaj ntsig zoo dua.

Cim npe nrov: Niobium Ntawv Nyiaj Rau Zog Nuclear Engineering, Tuam Tshoj Niobium Ntawv Nyiaj Rau Zog Nuclear Engineering Chaw Tsim Tshuaj, Chaw Tsim Tshuaj, Hoobkas