Raws li ib daim ntawv qhia tsis ntev los no los ntawm tus kws tshawb fawb hauv physicist, cov kws tshawb fawb hauv Amelikas tau ua rau txhuas lub Aluminium AA 7075, uas tsis tuaj yeem ua welded, los ua "cov dab tuag" nanoparticles, thiab cov khoom tau txais yuav raug siv hauv thaj tsam ntawm lub tsheb tsim kom ua rau lawv qhov chaw sib zog. Nws yog ntau zog npaum thiab nyob rau tib lub sijhawm ruaj.
Nyob rau xyoo 1940, cov kws tshawb fawb tau tsim lub AA 7075, uas yog li muaj zog li hlau, tab sis tsuas yog siv peb feem ntawm cov hlau, yog li pab txhawm rau txhim kho cov roj thiab cov roj teeb ntawm lub tsheb. Nws twb tau siv nyob rau hauv aircraft fuselage thiab Tooj, smartphone rooj plaub thiab nce toj siab.
Tab sis qhov no muaj kev sib ntaus sib tua muaj ib qho kev ntxhov - "kev sib deev tawv ncauj." Nws yog ib qho nyuaj rau kev sib tshuam, tshwj xeeb tshaj yog nyob rau hauv kev siv welding siv hauv tsheb tsim, ua rau nws tsis siv. Qhov no yog vim thaum cov hlau thawm thaum lub vuam txheej txheem, nws cov qauv molecular ua rau cov ntsiab lus constituent zinc, zinc, magnesium thiab tooj liab ntws tsis ncaj, ua rau cov kab nrib pleev rau hauv cov khoom welded.
Tam sim no, UCLA engineers tau tsim ib txoj kev tshiab ntawm vuam AA 7075: txhaj cov titanium carbide nanoparticles (tsuas yog ib npaug ntawm ib lub meter loj) rau hauv hlau ntawm AA 7075, cia cov nanoparticles los ua cov khoom sib txuas. Sau cov khoom nruab nrab ntawm.
Siv hom tshiab no, cov khoom sib txuas ua ke tau tsim muaj lub zog tensile ntawm mus txog 392 MPa. Hauv kev sib piv, AA 6061 aluminium alloy welded joints, uas yog dav siv hauv aircraft thiab tsheb yam, muaj lub zog tensile ntawm 186 MPa xwb. Raws li txoj kev tshawb no, kev kho cua kub tom qab qhov vuam siv tau nce lub zog tensile ntawm AA 7075 sib koom tes rau 551 MPa, uas yog piv rau cov hlau. Cov kev tshawb fawb tshiab kuj pom tau hais tias cov ntaub ntawv xov tooj muaj cov puv nanoparticles kuj tuaj yeem yooj yim nkag mus rau lwm cov hlau thiab hlau hlau uas tsis yooj yim.
Li Xiaochun, tus thawj xibfwb ntawm txoj kev tshawb no, tau hais tias: "Cov cuab yeej tshiab yuav tsum ua kom muaj lub zog zoo li aluminium alloy uas yog siv rau cov khoom siv uas tau tsim los ntawm lub luaj loj, xws li cov tsheb lossis cov tsheb kauj vab. lawv twb muaj thiab Cov cuab yeej sib txuas nrog no super-muaj zog aluminium alloy rau cov menyuam nws cov txheej txheem tsim, ua nws lighter thiab ntau zog npaum li tseem tuav nws lub zog. "
Cov kws tshawb fawb tau koom tes nrog lub tuam txhab tsim tsheb kauj vab los ua rau lub cev muaj ntshauv.
