Peb siv cov ncuav qab zib los txhim kho koj qhov kev paub.Los ntawm kev txuas ntxiv mus saib lub vev xaib no, koj pom zoo rau peb siv cov ncuav qab zib.Cov ntaub ntawv ntxiv.
Nyob rau hauv ib tsab xov xwm tsis ntev los no luam tawm nyob rau hauv phau ntawv journal Additive Manufacturing Letters, cov kws tshawb fawb tham txog cov txheej txheem laser melting rau tooj liab composites raws li 316L stainless hlau.
Kev tshawb fawb: Synthesis ntawm 316L stainless hlau-tooj ​​liab composites los ntawm laser melting.Duab credit: Pedal hauv Tshuag / Shutterstock.com
Txawm hais tias cov cua sov hloov mus rau hauv cov khoom homogeneous yog diffuse, cua sov tuaj yeem taug kev los ntawm cov khoom hnyav raws txoj kev ntawm qhov tsis kam.Nyob rau hauv cov hlau ua npuas ncauj radiators, nws raug nquahu kom siv anisotropy ntawm thermal conductivity thiab permeability kom nce qhov kub hloov pauv.
Tsis tas li ntawd, anisotropic thermal conduction yuav tsum pab txo cov kab mob parasitic los ntawm axial conduction hauv compact heat exchangers.Ntau txoj kev tau siv los hloov cov thermal conductivity ntawm alloys thiab hlau.Tsis yog ob qho ntawm cov kev qhia no tsis tsim nyog rau kev nthuav qhia cov tswv yim tswj kev tswj kom muaj cua sov hauv cov khoom hlau.
Hlau Matrix Composites (MMC) yog tsim los ntawm pob milled hmoov siv laser melting hauv hmoov txaj (LPBF) tshuab.Ib txoj kev tshiab LPBF tsis ntev los no tau raug npaj los tsim ODS 304 SS alloys los ntawm doping yttrium oxide precursors rau hauv ib txheej ntawm 304 SS hmoov ua ntej laser densification siv piezoelectric inkjet tshuab.Qhov kom zoo dua ntawm txoj kev no yog lub peev xwm los xaiv cov khoom siv hauv cov khoom sib txawv ntawm cov hmoov txheej, uas tso cai rau koj los tswj cov khoom siv nyob rau hauv lub ntim ua haujlwm ntawm lub cuab yeej.
Schematic sawv cev ntawm rhuab txaj txoj kev rau (a) tom qab cua sov thiab (b) ink conversion.Duab credit: Murray, JW et al.Cov ntawv ntawm Additive Manufacturing.
Hauv txoj kev tshawb no, cov kws sau ntawv siv Cu inkjet number case los ua kom pom cov txheej txheem laser melting rau kev tsim cov hlau matrix composites nrog thermal conductivity zoo dua li 316L stainless hlau.Txhawm rau simulate hybrid inkjet-hmoov txaj fusion txoj kev, stainless hlau hmoov txheej tau doped nrog tooj liab precursor inks thiab lub reservoir tshiab tau siv los tswj cov qib oxygen thaum lub sij hawm laser ua.
Pab neeg no tsim cov khoom sib xyaw ntawm 316L stainless hlau nrog tooj liab siv inkjet tooj liab number case nyob rau hauv ib puag ncig simulating laser alloy nyob rau hauv cov hmoov txaj.Kev npaj cov tshuaj reactors siv ib tug tshiab hybrid inkjet thiab LPBF cov txheej txheem uas yuav siv sij hawm kom zoo dua ntawm directional thermal conduction kom txo tau tag nrho cov loj thiab hnyav ntawm lub reactor.Qhov ua tau ntawm kev tsim cov ntaub ntawv sib xyaw siv cov inkjet number case yog qhia.
Cov kws tshawb fawb tau tsom mus rau kev xaiv ntawm Cu ink precursors thiab cov txheej txheem tsim khoom rau cov khoom siv sib xyaw kom txiav txim siab cov khoom ntom ntom, microhardness, muaj pes tsawg leeg, thiab thermal diffusivity.Ob tug neeg sib tw inks raug xaiv raws li oxidation stability, tsawg los yog tsis muaj additives, compatibility nrog inkjet printheads, thiab tsawg residue tom qab hloov dua siab tshiab.
Thawj CufAMP inks siv tooj liab formate (Cuf) ua tooj liab ntsev.Vinyltrimethylcopper(II) hexafluoroacetylacetonate (Cu(hfac)VTMS) yog lwm tus number case precursor.Ib qho kev sim sim tau ua los saib seb puas ziab thiab thermal decomposition ntawm tus number case ua rau muaj kev sib kis ntau ntawm tooj liab vim yog cov khoom siv tshuaj lom neeg ntau dua piv rau cov pa ziab thiab thermal decomposition.
Siv ob txoj hauv kev, ob lub microcoupons tau tsim thiab lawv cov microstructure piv los txiav txim siab qhov cuam tshuam ntawm txoj kev hloov.Ntawm qhov load ntawm 500 gf thiab lub sijhawm tuav ntawm 15 s, Vickers microhardness (HV) tau ntsuas ntawm ntu ntu ntawm thaj tsam fusion ntawm ob qhov qauv.
Schematic ntawm kev sim teeb tsa thiab cov txheej txheem rov ua dua rau kev tsim 316L SS-Cu cov qauv sib xyaw uas tsim los siv cov txheej txheem rhuab txaj.Duab credit: Murray, JW et al.Cov ntawv ntawm Additive Manufacturing.
Nws tau pom tias cov thermal conductivity ntawm cov khoom sib xyaw yog 187% siab dua li ntawm 316L stainless hlau, thiab microhardness yog 39% qis dua.Cov kev tshawb fawb microstructural tau pom tias txo qis kev sib tsoo ntawm lub ntsej muag tuaj yeem txhim kho thermal conductivity thiab txhua yam khoom ntawm cov khoom sib xyaw.Rau kev taw qhia cov cua kub ntws hauv cov khoom siv hluav taws xob, nws yog ib qho tsim nyog yuav tau xaiv ua kom cov thermal conductivity ntawm 316L stainless hlau.Cov khoom sib xyaw muaj cov thermal conductivity ntawm 41.0 W / mK, 2.9 npaug ntawm 316L stainless hlau, thiab 39% txo qhov tawv.
Piv rau forged thiab annealed 316L stainless hlau, microhardness ntawm cov qauv nyob rau hauv lub rhuab txheej yog 123 ± 59 HV, uas yog 39% qis dua.Qhov porosity ntawm qhov kawg sib xyaw yog 12%, uas yog txuam nrog cov kab noj hniav thiab cov kab nrib pleb ntawm qhov sib cuam tshuam ntawm SS thiab Cu theem.
Rau cov qauv tom qab cua sov thiab cov cua sov txheej, qhov microhardness ntawm cross seem ntawm fusion zone yog txiav txim siab li 110 ± 61 HV thiab 123 ± 59 HV, raws li, uas yog 45% thiab 39% qis dua 200 HV forged-annealed 316L stainless hlau.Vim qhov sib txawv loj hauv qhov kub ntawm qhov kub ntawm Cu thiab 316L stainless hlau, txog 315 ° C, cov kab nrib pleb hauv cov khoom sib xyaw tau tsim los ntawm cov kua dej tawg los ntawm cov kua dej ntawm Cu.
BSE duab (sab laug sab laug) thiab daim ntawv qhia cov ntsiab lus (Fe, Cu, O) tom qab qauv cua sov, tau los ntawm WDS tsom xam.Duab credit: Murray, JW et al.Cov ntawv ntawm Additive Manufacturing.
Hauv kev xaus, qhov kev tshawb fawb no qhia txog txoj hauv kev tshiab los tsim 316L SS-Cu cov khoom sib xyaw nrog cov thermal conductivity zoo dua li 316L SS siv cov tshuaj tsuag tooj liab.Cov khoom sib xyaw ua ke yog tsim los ntawm kev muab tus number case rau hauv lub hnab looj tes thiab hloov mus rau tooj liab, tom qab ntawd ntxiv cov hmoov stainless hlau rau saum nws, ces sib tov thiab kho hauv lub laser welder.
Cov txiaj ntsig ua ntej qhia tau hais tias methanol-based Cuf-AMP number case tuaj yeem degrade mus rau tooj liab ntshiab yam tsis tau tsim tooj liab oxide nyob rau hauv ib puag ncig zoo ib yam li cov txheej txheem LPBF.Cov txheej txheem rhuab txaj rau kev thov thiab hloov tus number case tsim microstructures nrog tsawg voids thiab impurities dua li cov txheej txheem tom qab cua sov.
Cov kws sau ntawv sau tseg tias cov kev tshawb fawb yav tom ntej yuav tshawb nrhiav txoj hauv kev los txo cov qoob loo thiab txhim kho cov yaj thiab sib xyaw ntawm SS thiab Cu theem, nrog rau cov khoom siv ntawm cov khoom sib xyaw.
Murray JW, Speidel A., Spierings A. et al.Synthesis ntawm 316L stainless hlau-tooj ​​liab composites los ntawm laser melting.Additive Manufacturing Fact Sheet 100058 (2022).https://www.sciencedirect.com/science/article/pii/S2772369022000329
Tsis lees paub: Cov kev xav tau hais tawm ntawm no yog cov neeg sau ntawv ntiag tug thiab tsis tas yuav cuam tshuam txog kev xav ntawm AZoM.com Limited T / A AZoNetwork, tus tswv thiab tus neeg teb xov tooj ntawm lub vev xaib no.Qhov kev lees paub no yog ib feem ntawm cov ntsiab lus ntawm kev siv lub vev xaib no.
Surbhi Jain yog tus kws sau ntawv thev naus laus zis nyob hauv Delhi, Is Nrias teb.Nws muaj Ph.D.Nws tuav PhD hauv Physics los ntawm University of Delhi thiab tau koom nrog ntau yam kev tshawb fawb, kab lis kev cai thiab kev ua kis las.Nws keeb kwm kev kawm yog nyob rau hauv cov ntaub ntawv tshawb fawb tshawb fawb nrog kev tshwj xeeb hauv kev txhim kho cov khoom siv kho qhov muag thiab cov sensors.Nws muaj kev paub dhau los hauv cov ntsiab lus sau, kho, sim cov ntaub ntawv tshawb xyuas thiab kev tswj hwm qhov project, thiab tau luam tawm 7 cov ntawv tshawb fawb hauv Scopus indexed cov ntawv xov xwm thiab tau ua 2 Indian patents raws li nws txoj haujlwm tshawb fawb.Nws mob siab rau kev nyeem ntawv, sau ntawv, tshawb fawb thiab thev naus laus zis thiab nyiam ua noj, ua si, ua vaj thiab ua si.
Jainism, Surbhi.(Lub Tsib Hlis 25, 2022).Laser melting tso cai rau zus tau tej cov hlau stainless thiab tooj liab composites.AZ.Tau txais los ntawm https://www.azom.com/news.aspx?newsID=59155 Lub Kaum Ob Hlis 25, 2022.
Jainism, Surbhi."Laser melting enables zus tau tej cov hlau stainless thiab tooj liab composites."AZ.Kaum Ob Hlis 25, 2022.Kaum Ob Hlis 25, 2022.
Jainism, Surbhi."Laser melting enables zus tau tej cov hlau stainless thiab tooj liab composites."AZ.https://www.azom.com/news.aspx?newsID=59155.(Lub Kaum Ob Hlis 25, 2022).
Jainism, Surbhi.2022. Kev tsim khoom ntawm cov hlau tsis muaj zog hlau / tooj liab sib xyaw los ntawm laser melting.AZoM, nkag rau 25 Kaum Ob Hlis 2022, https://www.azom.com/news.aspx?newsID=59155.
Hauv kev xam phaj no, AZoM tham nrog Bo Preston, Tus tsim ntawm Rainscreen Consulting, hais txog STRONGIRT, qhov zoo tagnrho Insulation Continuous (CI) Cladding Support System thiab nws cov ntawv thov.
AZoM tau tham nrog Dr. Shenlong Zhao thiab Dr. Bingwei Zhang txog lawv cov kev tshawb fawb tshiab los tsim cov roj teeb uas muaj sodium-sulfur ua tau zoo nyob rau hauv chav tsev kub raws li lwm txoj hauv kev lithium-ion roj teeb.
Hauv kev xam phaj tshiab nrog AZoM, peb tham nrog NIST's Jeff Scheinlein hauv Boulder, Colorado txog nws txoj kev tshawb fawb txog kev tsim cov khoom siv hluav taws xob superconducting nrog tus cwj pwm synaptic.Qhov kev tshawb fawb no tuaj yeem hloov txoj hauv kev peb mus rau kev txawj ntse txawj ntse thiab suav.
Prometheus los ntawm Admesy yog lub colorimeter zoo tagnrho rau txhua hom kev ntsuas qhov chaw ntawm cov khoom.
Cov khoom lag luam luv luv no muab cov ntsiab lus ntawm ZEISS Sigma FE-SEM rau cov duab zoo thiab cov tshuaj ntsuam xyuas qib siab.
SB254 muab kev ua haujlwm siab ntawm electron beam lithography ntawm kev lag luam ceev.Nws tuaj yeem ua haujlwm nrog ntau yam khoom siv semiconductor.
Kev lag luam thoob ntiaj teb semiconductor tau nkag mus rau lub sijhawm zoo siab.Kev thov rau cov tshuab chip muaj ob qho tib si spurred thiab retarded txoj kev loj hlob ntawm kev lag luam, thiab tam sim no chip tsis txaus yuav tsum tau mus ntxiv rau qee lub sij hawm.Cov qauv tam sim no yuav ua rau lub neej yav tom ntej ntawm kev lag luam raws li qhov no txuas ntxiv mus
Qhov sib txawv tseem ceeb ntawm graphene-raws li roj teeb thiab cov roj teeb hauv lub xeev yog cov muaj pes tsawg leeg ntawm cov electrodes.Txawm hais tias cathodes feem ntau hloov kho, allotropes ntawm carbon kuj tuaj yeem siv los ua anodes.
Nyob rau hauv xyoo tas los no, Is Taws Nem ntawm Yam tau ua tiav sai hauv yuav luag txhua qhov chaw, tab sis nws tseem ceeb tshwj xeeb hauv kev lag luam tsheb hluav taws xob.