Cov kws tshawb fawb ntawm Kyoto University tau pom tias molybdenum silicides tuaj yeem txhim kho kev ua haujlwm ntawm turbine blades hauv ultrahigh-temperature combustion systems.

Gas turbines yog cov cav uas tsim hluav taws xob hauv cov chaw tsim hluav taws xob. Kev khiav hauj lwm kub ntawm lawv cov combustion tshuab tuaj yeem tshaj 1600 ° C. Cov nickel-based turbine blades siv nyob rau hauv cov tshuab no yaj ntawm qhov kub ntawm 200 ° C qis dua thiab yog li xav tau cua txias kom ua haujlwm. Turbine blades ua los ntawm cov ntaub ntawv uas muaj melting kub ntau dua yuav tsum tau siv roj tsawg thiab ua rau txo qis CO2 emissions.

Cov kws tshawb fawb ntawm Nyij Pooj Kyoto University tshawb xyuas cov khoom ntawm ntau qhov sib xyaw ntawm molybdenum silicides, nrog thiab tsis muaj cov ntsiab lus ternary ntxiv.

Cov kev tshawb fawb yav dhau los tau qhia tias kev tsim cov molybdenum silicide-raws li cov khoom sib xyaw los ntawm kev nias thiab cua sov lawv cov hmoov - hu ua hmoov metallurgy - txhim kho lawv cov kev tiv thaiv kom tawg ntawm qhov kub thiab txias, tab sis txo qis lawv lub zog kub, vim yog kev txhim kho ntawm silicon dioxide txheej hauv cov khoom.

Pab pawg Kyoto University tau tsim lawv cov molybdenum silicide-raws li cov ntaub ntawv uas siv ib txoj kev hu ua "directional solidification," uas molten hlau txuas ntxiv mus rau hauv ib qho kev taw qhia.

Pab neeg no pom tias cov khoom sib xws tuaj yeem tsim los ntawm kev tswj cov khoom sib txuas ntawm molybdenum silicide-raws li kev sib xyaw thaum tsim khoom thiab los ntawm kev kho tus nqi ntawm cov khoom ternary ntxiv rau cov khoom sib xyaw.

Cov khoom siv tau pib deforming plastically nyob rau hauv uniaxial compression saum 1000 ° C. Tsis tas li ntawd, cov khoom siv lub zog kub kub nce los ntawm microstructure refinement. Ntxiv tantalum rau cov khoom sib xyaw ua haujlwm zoo dua li ntxiv vanadium, niobium lossis tungsten rau kev txhim kho lub zog ntawm cov khoom ntawm qhov kub thiab txias ntawm 1400 ° C. Cov alloys tsim los ntawm Kyoto University pab pawg muaj zog ntau dua ntawm qhov kub siab dua li niaj hnub nickel-based superalloys thiab tsis ntev los no tau tsim cov khoom siv hluav taws xob kub kub, cov kws tshawb fawb tau tshaj tawm hauv lawv txoj kev tshawb fawb luam tawm hauv phau ntawv Journal Science thiab Technology of Advanced Materials.