Ofufuza pa yunivesite ya Kyoto apeza kuti ma molybdenum silicides amatha kupititsa patsogolo mphamvu ya masamba a turbine pamakina oyaka ndi kutentha kwambiri.

Ma turbines a gasi ndi injini zomwe zimapanga magetsi m'mafakitale amagetsi. Kutentha kwa machitidwe awo oyaka amatha kupitirira 1600 ° C. Ma turbine opangidwa ndi faifi omwe amagwiritsidwa ntchito m'makinawa amasungunuka pa kutentha kwa 200 ° C kutsika motero amafunikira kuziziritsa kwa mpweya kuti agwire ntchito. Ma turbine blade opangidwa ndi zinthu zokhala ndi kutentha kwambiri kusungunuka kungafune kuwononga mafuta pang'ono ndikuchepetsa mpweya wa CO2.

Asayansi a Zipangizo pa Yunivesite ya Kyoto ku Japan adafufuza zamitundu yosiyanasiyana ya ma silicides a molybdenum, okhala ndi zinthu zina zowonjezera.

Kafukufuku wam'mbuyo adawonetsa kuti kupanga ma molybdenum silicide-based composites mwa kukanikiza ndi kutenthetsa ufa wawo - wotchedwa powder metallurgy - kumathandizira kukana kwawo kuphwanyidwa ndi kutentha kozungulira koma kumachepetsa mphamvu yawo yotentha kwambiri, chifukwa chakukula kwa zigawo za silicon dioxide mkati mwazinthuzo.

Gulu la yunivesite ya Kyoto linapanga zida zawo zokhala ndi silicide ya molybdenum pogwiritsa ntchito njira yotchedwa "directional solidification," momwe zitsulo zosungunuka zimalimba pang'onopang'ono mbali ina.

Gululo linapeza kuti chinthu chofanana chikhoza kupangidwa mwa kuyang'anira kuchuluka kwa kulimba kwa gulu la molybdenum silicide-based composite panthawi yopanga komanso kusintha kuchuluka kwa ternary element yomwe imawonjezeredwa ku gululo.

Zotsatira zake zimayamba kupunduka mu pulasitiki pansi pa uniaxial compression pamwamba pa 1000 °C. Komanso, mphamvu yotentha kwambiri ya zinthuzo imawonjezeka kudzera mu kukonzanso kwa microstructure. Kuwonjezera tantalum ku kompositi n'kothandiza kwambiri kuposa kuwonjezera vanadium, niobium kapena tungsten kupititsa patsogolo mphamvu ya zinthu pa kutentha pafupifupi 1400 °C. Ma alloys opangidwa ndi gulu la yunivesite ya Kyoto ndi amphamvu kwambiri pa kutentha kwakukulu kusiyana ndi ma superalloys amakono a nickel komanso zipangizo zamakono zamakono zomwe zimapangidwira posachedwapa, ochita kafukufuku amafotokoza mu kafukufuku wawo wofalitsidwa m'magazini ya Science and Technology of Advanced Materials.