Thaum lub sij hawm evaporation txheej, nucleation thiab kev loj hlob ntawm cov zaj duab xis txheej yog lub hauv paus ntawm ntau yam ion txheej tshuab
1. Nucleation
InLub tshuab nqus tsev evaporation txheej tshuab, tom qab cov zaj duab xis txheej hais yog evaporated los ntawm evaporation qhov chaw nyob rau hauv daim ntawv ntawm atoms, lawv ya ncaj qha mus rau lub workpiece nyob rau hauv lub tshuab nqus tsev siab thiab tsim cov zaj duab xis txheej los ntawm nucleation thiab loj hlob ntawm lub workpiece.Thaum lub tshuab nqus tsev vacuum evaporation, lub zog ntawm zaj duab xis txheej atoms khiav tawm ntawm qhov chaw evaporation yog txog 0.2eV.Thaum lub cohesion ntawm cov khoom ntawm cov zaj duab xis txheej yog ntau tshaj qhov sib txuas quab yuam ntawm cov atoms ntawm zaj duab xis txheej thiab lub workpiece, tsim ib tug kob nucleus.Ib zaj duab xis txheej atom nyob twj ywm rau ntawm qhov chaw ntawm lub workpiece rau lub sij hawm ntawm lub sij hawm ua tsis xwm yeem txav, diffusion, tsiv teb tsaws, los yog kev sib tsoo nrog lwm cov atoms los tsim atomic pawg Cov naj npawb ntawm atoms nyob rau hauv lub atomic pawg nce mus txog ib tug tej yam tseem ceeb tus nqi, ib tug ruaj khov. nucleus yog tsim, hu ua homogeneous zoo li tus nucleus.
du, thiab muaj ntau yam tsis xws luag thiab cov kauj ruam, uas ua rau qhov sib txawv ntawm cov adsorption quab yuam ntawm ntau qhov chaw ntawm lub workpiece mus rau radioactive atoms.Lub zog adsorption ntawm qhov chaw ntawm qhov tsis xws luag yog ntau dua li ntawm ib txwm nto, yog li nws dhau los ua qhov chaw nquag, uas yog qhov zoo rau kev nyiam nucleation, hu ua heterogeneous nucleation.Thaum lub cohesive quab yuam yog sib npaug rau lub binding quab yuam, los yog lub binding quab yuam ntawm daim nyias nyias atoms thiab lub workpiece yog ntau dua li cohesive quab yuam ntawm lub membrane atoms, lub lamellar qauv yog tsim.Hauv ion plating technology, cov tub ntxhais kob yog tsim nyob rau hauv feem ntau.
2. Kev loj hlob
Thaum lub hauv paus ntawm zaj duab xis yog tsim, nws tseem loj hlob los ntawm kev ntxiab qhov xwm txheej atoms.Cov Islands tuaj loj hlob thiab sib xyaw ua ke los tsim cov hemispheres loj dua, maj mam tsim ib hemispherical kob txheej uas kis mus rau saum npoo ntawm lub workpiece.
Thaum lub atomic zog ntawm cov zaj duab xis txheej yog siab, nws muaj peev xwm diffuse txaus nyob rau saum npoo thiab ib tug du nruam zaj duab xis yuav tsim tau thaum lub tom ntej no atomic pawg me me.Yog hais tias lub diffusion ntawm cov atoms nyob rau saum npoo tsis muaj zog thiab qhov loj ntawm lub atomic zog. Lub deposited pawg yog loj, lawv nyob ua ib tug loj ceg av qab teb nuclei.Lub sab saum toj ntawm cov kob cov tub ntxhais muaj ib tug muaj zog shading nyhuv ntawm lub concave ib feem, uas yog lub "duab ntxoov ntxoo nyhuv". thiab kev loj hlob zoo dua, ua rau muaj kev nce qib ntawm concavity ntawm qhov chaw los tsim conical lossis columnar crystals ntawm qhov loj txaus.Kev nkag mus rau voids yog tsim los ntawm cov conical crystals thiab nto roughness tus nqi nce. Cov ntaub so ntswg zoo tuaj yeem tau txais ntawm lub tshuab nqus tsev siab, nrog rau qhov txo qis ntawm lub tshuab nqus tsev, lub microstructure ntawm daim nyias nyias yuav thicker thiab thicker.
Post lub sij hawm: May-24-2023