Abacwaningi eNyuvesi yase-Kyoto bathole ukuthi i-molybdenum silicides ingathuthukisa ukusebenza kahle kwama-turbine blades ezinhlelweni zokuvutha kokushisa okuphezulu kakhulu.

Izinjini zegesi yizinjini ezikhiqiza ugesi ezikhungweni zikagesi. Amazinga okushisa okusebenza amasistimu azo omlilo angadlula ku-1600 °C. Ama-turbine blades asekelwe ku-nickel asetshenziswa kulezi zinhlelo ayancibilika emazingeni okushisa angama-200 °C ngaphansi futhi ngaleyo ndlela adinga ukupholisa komoya ukuze asebenze. Ama-turbine blades enziwe ngezinto ezinamazinga okushisa aphakeme ancibilika angadinga ukusetshenziswa kukaphethiloli okuncane futhi aholele ekukhiqizweni kwe-CO2 ephansi.

Ososayensi bezinto ezibonakalayo eNyuvesi yase-Kyoto yase-Japan baphenya izakhiwo zezingxenye ezihlukahlukene zama-silicidi e-molybdenum, anezici ze-ternary ezengeziwe nangaphandle kwazo.

Ucwaningo lwangaphambilini lubonise ukuthi ukwenza izinhlanganisela ezisekelwe kwi-molybdenum silicide ngokucindezela nangokushisisa izimpushana zazo - ezaziwa ngokuthi i-powder metallurgy - kuthuthukisa ukumelana kwazo nokuqhekeka emazingeni okushisa azungezile kodwa kwehlisa amandla azo okushisa okuphezulu, ngenxa yokuthuthukiswa kwezingqimba ze-silicon dioxide ngaphakathi kwempahla.

Ithimba leNyuvesi yase-Kyoto lenze izinto zalo ezisekelwe ku-molybdenum silicide lisebenzisa indlela eyaziwa ngokuthi “i-directional solidification,” lapho insimbi encibilikisiwe iqhubeka iqina ohlangothini oluthile.

Ithimba lithole ukuthi into efanayo ingakhiwa ngokulawula izinga lokuqiniswa kwenhlanganisela esekelwe ku-molybdenum silicide ngesikhathi sokwenziwa nangokulungisa inani le-elementi ye-ternary eyengezwe kwinhlanganisela.

Izinto eziwumphumela ziqala ukuwohloka ngokwepulasitiki ngaphansi kokucindezelwa kwe-uniaxial ngaphezu kuka-1000 °C. Futhi, amandla wezinga eliphezulu lokushisa akhuphuka ngokuthuthukiswa kwe-microstructure. Ukwengeza i-tantalum kwinhlanganisela kuphumelela kakhulu kunokwengeza i-vanadium, i-niobium noma i-tungsten ukuze kuthuthukiswe amandla wento emazingeni okushisa acishe abe ngu-1400 °C. Ama-alloys akhiwe ithimba leNyuvesi yase-Kyoto anamandla kakhulu emazingeni okushisa aphezulu kunama-superalloy esimanje asekelwe ku-nickel kanye nezinto zokwakha ezisanda kuthuthukiswa, abacwaningi babika ocwaningweni lwabo olushicilelwe kumagazini i-Science and Technology of Advanced Materials.