Kawm Txog Ablation Resistance Ntawm Marine Titanium Alloys Thiab Chromium Coatings Tom qab ua tiav

Hauv kev tsim thiab tu cov nkoj hauv hiav txwv, cov khoom siv hauv hiav txwv tau raug rau qhov chaw ua haujlwm huab cua, tshwj xeeb tshaj yog cov kev sib tw ntawm qhov kub thiab txias ablation, uas txwv tsis pub lawv lub neej ua haujlwm. Daim ntawv no tsom mus rau txoj kev ua haujlwm tshiab los ntawm kev txhim kho ablation tsis kam ntawm titanium alloy cov ntaub ntawv los ntawm kev kho lawv nrog chromium txheej ntawm lawv qhov chaw los ntawm cov txheej txheem tshwj xeeb. Los ntawm kev sim laser ablation uas simulate qhov chaw ua haujlwm ntawm lub nkoj, peb ua tib zoo tshawb nrhiav qhov cuam tshuam ntawm kev kho no ntawm cov khoom ntawm titanium alloys thiab chromium coatings.
Nrog rau kev nce qib ntawm kev siv tshuab marine engineering, kev ua haujlwm ntawm cov khoom siv nkoj tau dhau los ua nruj dua. Titanium alloy, nrog nws cov khoom siv zoo heev thiab kev tiv thaiv corrosion, tuav txoj haujlwm tseem ceeb hauv kev tsim nkoj. Txawm li cas los xij, qhov kub-kub ablation nyob rau hauv ib puag ncig marine tseem yog ib qho kev sib tw loj uas txwv tsis pub nws daim ntawv thov. Txhawm rau ua kom tau raws li qhov kev sib tw no, peb tau txais kev siv thev naus laus zis los kho cov titanium alloys nrog chromium plating, nrog rau kev saib xyuas kom lawv cov ablative corrosion kuj.

Kev ua cov txheej txheem thiab cov khoom npaj titanium alloy substrate ua: precision hlau txiav tshuab tau siv los txiav cov titanium alloy raw khoom rau hauv cov qauv loj (2 cm × 1 cm × 0.5 cm). Tom qab ntawd, nws tau polished siv 1500 grit sandpaper, tom qab ntawd polished nrog abrasive muab tshuaj txhuam rau daim iav nyhuv, thiab thaum kawg ntxuav los ntawm ultrasonic yoj kom tshem tawm cov impurities saum npoo los xyuas kom meej qhov tiav ntawm substrate. Chromium Txheej Txheej: Chromium txheej tau muab tso rau saum npoo ntawm cov qauv titanium alloy npaj siv cov thev naus laus zis arc ion plating. Los ntawm kev tswj hwm lub tshuab nqus tsev (6 × 10^-3 Pa), qhov kub thiab txias (300 degree), NH3 siab (2 ~ 3 Pa) thiab tsis zoo voltage (800 ~ 1000 V), cov txheej chromium tau ua kom zoo ib yam. thiab ntom, thiab lub sij hawm deposition tau tswj ntawm 10 ~ 20 feeb. Laser ablation thwmsim thiab soj ntsuam cov txiaj ntsig Yuav kom ntsuas qhov ablation tsis kam ntawm cov txheej txheem titanium alloy thiab chromium txheej, peb tsim cov kev sim laser ablation. Cov kev sim siv lub tsev ntev mem tes dav laser (qauv FLK-TIX6409Hz) simulate cov txheej txheem ablation ntawm nkoj qhov chaw nyob rau hauv qhov kub thiab txias ib puag ncig los ntawm kev kho cov mem tes zog thiab pes tsawg pulses. Cov txiaj ntsig kev sim qhia tau hais tias qhov tsis tau kho titanium alloy substrate muaj qhov loj thiab sib sib zog nqus ablation craters rau ntawm qhov chaw nyob rau hauv laser ablation, nrog ntau cov kab nrib pleb nyob rau hauv qhov chaw txawm tias du, thiab ib tug tuab oxide txuam nyob rau hauv lub ntug cheeb tsam. Nyob rau hauv sib piv, cov chromium-plated txheej nyob rau saum npoo ntawm cov txheej txheem titanium alloy pom superior ablation kuj nyob rau hauv tib yam kev mob, nrog ntiav ablation pits thiab tsawg kab nrib pleb, thiab ho tsis tshua muaj oxide buildup.
Los ntawm kev tshuaj ntsuam xyuas electron microscopy (SEM) thiab lub zog dispersive spectroscopy (EDAX) micro-morphology thiab kev txheeb xyuas qhov sib xyaw ntawm qhov chaw ablated, peb pom tias cov chromium txheej tau zoo thaiv qhov kev yaig ncaj qha ntawm cov pa kub kub ntawm titanium alloy substrate thiab txo qhov tshwm sim. ntawm oxidation cov tshuaj tiv thaiv, yog li txhim kho tag nrho ablation-resistant zog ntawm cov khoom.