Yuav ua li cas los daws cov teeb meem antioxidant ntawm cov dav hlau cav tuaj ntawm ultra - high kub?

Cov tshuab hluav taws xob yog lub npe hu ua "hlaws ntawm kev lag luam yas kev lag luam", thiab lawv cov kev ua tau zoo ncaj qha cov kev txwv ntawm cov dav hlau. Ntawm lawv, siab {{{}} siab turnine yas, raws li ib qho ntawm cov khoom siv kub tshaj plaws thiab muaj cov khoom siv ntau tshaj plaws ua cov qauv thev naus laus zis. Thaum Nickel raws ib qho Crystal siab- kub alloys ze rau ntawm ultra- cov ntaub ntawv kub siab? Cov ntsiab lus teb rau hom tshwj xeeb ntawm cov hlau - niobium hafnium hafnium alloy, thiabC103 (NB-10HF-1TI)yog tus qauv uas tau sim rau ntau xyoo dhau los.

Kev ua tau zoo thiab thawb cov tub rog ntawm lub dav hlau cav cov lus dag ua ntej lub turbine. Qhov siab dua qhov ntsuas kub, siab dua ua tau zoo. Txawm li cas los xij, hauv Ultra -} qhov chaw kub kub} qhov chaw nyob sab saud 1400 degree, cov ntaub ntawv ntsib ob tus tsiaj ntawv loj:
1. Kev txo qis nrawm hauv qhov siab - lub zog kub: Cov khoom undergoes creep thiab yog ncab thiab deformed zoo li syrup hauv qab centrifugal ntxhov siab.
2. Kev puas tsuaj loj oxidation: Cov pa pa roj yuav corrode zoo li xeb, tab sis nkag mus rau thiab nkag mus rau hauv cov hlau ntawm kev xav tsis thoob, ua rau tsis muaj kev ua tsis tiav.
Tsoos siab ib txwm - kub alloys tau sab sab hauv qhov chaw ib puag ncig no. Txawm hais tias Ceramic raws li cov ntaub ntawv sib xyaw ua ke muaj oxidation zoo ua tsis kam, lawv txoj kev ua kom zoo nkauj thiab tus nqi siab txwv lawv daim ntawv thov. Txij ntawm no, tib neeg tig lawv lub siab rau cov hlau refrals.

Ntawm plaub tus refractory hlau tungsten, molybdenum, tantalum, thiab niobium, niobium sawv nrog nws qhov kev ua tau zoo tshaj plaws:

• Siab Melting taw tes (txog 2468 Degree), nrog lub qhov rais ua haujlwm ua haujlwm deb tshaj plaws ntawm ob npib tsib xee raws li alloys.
• Qhov qis ntom ntom (txog 8.6 g / cm ³), uas tsuas yog kwv yees li ib nrab ntawm tungsten, yog tus yuam sij rau kev ua tiav qhov kev sib tsoo hauv "Thrust mus rau qhov hnyav piv".
• Chav nyob zoo qhov kub thiab cov txheej txheemZam qhov qis - kub qhov teeb meem brittleness ntawm tungsten thiab molybdenum.

Txawm li cas los xij, Niobium ntshiab tau tsis muaj zog tsis txaus thiab muaj peev xwm tsis tshua muaj peev xwm. Qhov no yog qhov tseeb nyob qhov twgniobium hafnium alloy c103excrels. Los ntawm kev ntxiv10% HAFNIUM (HF) thiab 1% titanium (ti), C103 tiav tau zoo tshaj plaws synergistic muaj zog zog:

• Hafnium (HF): Nws yog ib qho kev daws teeb meem tseem ceeb ntxiv qub uas txhim kho qhov siab - lub zog thiab recrystallization kub ntawm alloys. Tseem ceeb tshaj, Hafnium tuaj yeem tsim cov denser thiab ntau dua adhesive anti {2} {}}} ua cov txheej txheem.
• Titanium (ti): Ntxiv cov kev pab hauv kev ntxiv dag zog thiab txhim kho cov txheej txheem kev ua tau zoo.

Raws li qhov tshwm sim, C103 muaj cov kev muaj peev xwm los ris cov khoom siv hauv qhov kub thiab txias ntawm 1300-1500 degree, uas yog qhov zoo dua uas tsis sib xws.

Qhov tseeb irreplaceability ntawm C103 yog xav txog nws cov cim kev sib raug zoo nrog cov tshuab tshuaj tiv thaiv kab mob antioxidant.
1. Zoo meej phim nrog silicon - Raws txheej
Oxidation tiv thaiv ntawm C103 tsis cia siab rau nws tus kheej, tab sis theej rau kev npaj ntawm ib txheej ntawmcov kab muag zooNyob rau saum npoo (xws li Mosi ₂, si cre, thiab lwm yam). Cov txheej no yuav ua ib qho tuab heev iav Sio ₂ Zaj duab xis ntawm qhov kub thiab txias, uas tuaj yeem thaiv kev nkag siab oxygen.
TusHafnium lub caijHauv C103 plays lub luag haujlwm tseem ceeb ntawm no:

• Txhim Kho Cov Txheej Txheej Adadhion: At the interface between the coating and the substrate, hafnium can form a more resilient interface layer, effectively alleviating thermal stress caused by differences in thermal expansion coefficients and preventing coating peeling during cold and hot cycles.
• Txhim kho kev tiv thaiv kev tiv thaiv zaj duab xis: Hafnium oxide tuaj yeem sib xyaw rau hauv sio ₂ iav zaj duab xis txhawm rau txhim kho nws cov xim thiab tus kheej {} ating kho kom nrawm "tom qab kev puas tsuaj me me.

Qhov ruaj khov thiab ruaj khov nruab nrab ntawm substrate thiab txheej yog unmatched los ntawm lwm niobium alloys lossis refractory hlau. Nws tuaj yeem hais tau tiasC103 yog qhov zoo tshaj plaws substrate ua kom siab rau high-} kub txheej txheem.
2. Kev ua yeeb yam seem nyob rau hauv ib puag ncig heev
Hauv kev nrhiav cov ultra - high kub, C103 muab cov lus tsis tshua muaj ":

• Piv rau tungsten alloy: Nws muaj qhov ceev loj kom zoo dua thiab daws cov mob tseem ceeb ntawm qhov mob ntawm qhov hnyav rau kev tig.
• Piv rau molybdenum alloys: Tsis muaj tsawg - kub ua kom nruj, cov txheej txheem zoo thiab kev ntseeg tau.
• Piv rau tantalum alloys: Txo ceev ceev, cov nqi sib xws, thiab ntau dua paub paub tab ov {{}} oxidation txheej thev naus laus zis.

Txawm hais tias muaj kev txhim kho sai ntawm cov ntaub ntawv tshiab xws li cov khoom sib xyaw Ceramic sib xyaw, tseem muaj chav nyob rau kev txhim khoLub zog, kev tawv nqaij, thermal poob siab kuj, thiab txheej txheemNyob rau hauv daim teb ntawm heev xav tau kev hloov pauv sib txawv xws li cov kev daws teeb meem yog li ntawm -} oxidation txheej, thiab ua tau zoo tshaj plaws.
Nws sawv cev rau ib qho kev txawj ntse classic hauv cov ntaub ntawv tshawb fawb: tsis tshawb xyuas cov khoom siv "universal" uas tuaj yeem ua haujlwm ua ke hauv cov txheej txheem ntau yam los ntawm txheej txheej thev naus laus zis. Raws li ntev raws li tib neeg txoj kev nrhiav ntawm lub tshuab tsim dav hlau yog qhov kawg, C103 thiab nws txuas ntxiv mus ua si ntawm cov nplaim hluav taws xob hauv cov nplaim hluav taws xob hauv cov roj Ultra}