Copper alloys tau tsim ib qho tseem ceeb nyob rau hauv lub cheeb tsam ntawm hlau additive manufacturing.
Tooj liab, renowned rau nws tshwj xeeb thermal conductivity, tau tshwm sim raws li ib tug ntawm cov feem ntau nrhiav-tom qab hlau nyob rau hauv lub cheeb tsam ntawm additive manufacturing kev tshawb fawb thiab kev loj hlob. Cov cwj pwm no ua rau nws xav tau tshwj xeeb rau kev lag luam xws li aerospace thiab electronics, qhov kev sib pauv cua sov yog qhov tseem ceeb heev. Copper lub thermal conductivity nyob qib thib ob tsuas yog nyiaj ntawm cov hlau, tab sis nws los ntawm tus nqi qis dua. Copper alloys tsis tsuas yog muab kev ua haujlwm zoo dua qub, tab sis kuj tseem muaj cov khoom siv hluav taws xob muaj txiaj ntsig.
Feem ntau siv tooj liab alloys hauv kev tsim khoom ntxiv suav nrog GRCop-42 thiab GRCop-84 (ob leeg muaj tooj liab, chromium, thiab niobium), C18150 (suav nrog tooj liab, chromium, thiab zirconium), C18200 (muaj tooj liab thiab chromium). ), thiab GlidCop (sib txuas tooj liab nrog aluminium oxide). Copper alloy hmoov nthuav tawm lub ntsej muag maj mam liab, thaum lub txiaj ntsig ntawm cov khoom tsim khoom tsim tau nthuav tawm cov classic radiance ntawm tooj liab.
NASA spearheaded siv tooj liab alloy forged Cheebtsam nyob rau hauv lub thawj engine ntawm chaw shuttles thaum lub sij hawm 1970s. GRCop (tooj liab-chromium-niobium) hlau hmoov yog tsim los ntawm NASA metallurgist David Ellis raws li kev txhim kho dhau los ntawm forging alloys thiab tau ua hauj lwm nrog rau lub tshuab nqus tsev plasma spraying, ib tug ncaj qha zog deposition (DED) additive manufacturing txheej txheem muaj peev xwm ua tau ncaj qha loj- scale qauv.
Nrog rau qhov tshwm sim ntawm laser hmoov txaj fusion (LPBF), tooj liab hmoov pom qhov zoo tshaj plaws match nyob rau hauv advanced additive manufacturing txuj ci. LPBF yog cov txheej txheem tsim khoom ua nyob rau hauv lub thawv ntim hermetically uas ua rau muaj kev tsim cov geometries zoo heev hauv cov duab, tsim kom tau raws li qhov xav tau ntawm kev txiav-ntug foob pob hluav taws combustion chamber tsim lossis siv hluav taws xob txias phaj.
Cov geometries intricate, txhawb kev tsim khoom ntxiv, ntes cov xim ntawm cov engineers tsom rau kev tsim cov foob pob hluav taws sib sib zog nqus nrog cov txheej txheem tshiab propulsion rau cov ntawv thov xws li cov foob pob hluav taws thiab cov tshuab hypersonic. Lub foob pob hluav taws lub thrust chamber xav tau cov ntaub ntawv muaj peev xwm tiv taus qhov kub thiab txias thaum lub sij hawm ignition. Txawm li cas los xij, raws li nws tseem ceeb ua haujlwm raws li cov khoom siv hluav taws xob sib txawv, lub chamber yuav tsum tiv thaiv cov dej ntws ntawm ultracold rocket propellants nyob rau hauv nws ib puag ncig. Additive manufacturing's complex cooling channels, precisely crafted on the walls of the thruster, muab qhov tshwj xeeb tshuav nyiaj li cas rau qhov hloov pauv ib puag ncig, tshaj qhov geometric muaj peev xwm ua tiav los ntawm lwm cov txheej txheem tsim khoom.
