Txoj kev kho mob rau cov raj titanium saum npoo oxidation
Titanium hlab yog dav siv nyob rau hauv Aerospace, cov cuab yeej kho mob, thiab tshuaj siv tshuaj lom neeg vim lawv biocompatibility, corrosion tsis kam, thiab muaj zog siab. Txawm li cas los xij, muaj cov txheej oxide rau saum npoo ntawm titanium hlab tuaj yeem txo qis nteg ntom ntom, nce roubness, thiab txawm tias kev pheej hmoo ntawm hydrogen embrittlement. Nyob rau hauv cov biomedical teb, txheej oxide kuj tseem yuav cuam tshuam ncaj ncaj ntawm cov pob txha pob txha ncaj qha rau lub titanium matrix, cuam tshuam cov kev cuam tshuam rau cov neeg tsis muaj peev xwm. Txhawm rau kom tau raws li cov kev xav tau ntawm cov xwm txheej sib txawv, cov raj ua raj tawm saum npoo oxidation yuav tsum tau txoj kev kho kom zoo tshaj plaws nrog kev ua haujlwm zoo.
Qhov yooj yim Oxide Txheej Purification: Kev Kho Mob thiab Tshuaj Cob Qhia Kev Kho Mob
Oxide txheej ua phev yog cov kauj ruam tseem ceeb hauv kev kho cov raj saum npoo titanium. Cov qauv tsim nyog yuav tsum tau xaiv raws li Oxide txheej txheej tuab, cov khoom siv, thiab cov txheej txheem yuav tsum tau ua.
Neeg kho tshuab pretreative: kev tswj hwm ntawm sandblasting thiab polishing
Rau oxide txheej thicker tuab dua 50μm, sandblasting nrog dawb corundum grit (200-400 mesh) yuav tsum muaj, siv lub siab ntawm 0.4-0.6mpa rau 15-30 vib nas this. Tus txheej txheem no tuaj yeem sai sai tshem tawm cov xuab zeb thiab cov kua oxide, tab sis yuav tsum tau tswj hwm nruj ntawm kev tswj hwm siab. Cov ntaub ntawv tshawb fawb ntawm cov raj titanium ua rau cov ntawv thov aviation qhia tau tias kev ntsuas tshaj li 0.6 MPa tuaj yeem ua rau muaj cov kev sib tw ntawm cov raj titanium. Rau cov txheej txheem nyuaj, ultrasonic polishing tuaj yeem ua ke nrog cov txheej txheem siab (20-40 daus
Tshuaj Tu: Ua kom zoo dua ntawm cov pickling
Rau cov yeeb yaj kiab oxide nyias (<20 μm), a mixed HF-HNO₃ acid system is recommended: 3%-5% hydrofluoric acid and 15%-30% nitric acid in a 1:3 volume ratio, treated at 25-35°C for 1-3 minutes. This system achieves efficient cleaning through a dual reaction mechanism: hydrofluoric acid dissolves the TiO₂ in the oxide film, while nitric acid oxidizes the titanium substrate surface, forming a passivation layer to prevent excessive corrosion. Experimental data from a medical device company showed that the surface roughness Ra of titanium tubes treated using this process can be reduced from 3.2μm to 0.8μm, while the increase in hydrogen content is kept within 0.002%, fully meeting the ISO 13779-2 standard.
Nqus Cua Sov Cua Sov: Tshem tawm cov mob sib sib zog nqus Oxidation sib sib zog nqus
For thick oxide layers (>100μm) Tsim thaum ua kom sov, ob-kauj ruam nqus cua sov kev kho mob Tom qab ntawd, lub tshuab kho kom zoo yog ua nyob rau hauv ib puag ncig ntawm 10 as kev lag luam kom txo cov ntsiab lus hydrogen rau hauv qab 0001%. Ib pab neeg tshawb fawb los ntawm Xi'an University of Technology pom tias txoj kev no tuaj yeem txo cov thickness ntawm tittrate titting los ntawm 15%, txhim kho kev ua tiav tom ntej.
Functionalized Oxide Txheej Txheej Txheem: Anodic oxidation thiab micro-arc oxidation technologies
Lub tsev ua haujlwm oxide txheej los ntawm cov txheej txheem siv hluav taws xob electriochemical, raws li cov khoom siv tsis kam, tshuaj tua kab mob rau titanium hlab.
Anodizing: xim tswj thiab corrosion tiv taus txhim kho
Siv cov raj titanium ua cov anode thiab stainless hlau raws li cathode, anodizing yog ua ntawm qhov hluav taws xob ntawm 10-100g / l) thiab tshuaj fluoride (10-20g / l). Los ntawm kev kho lub voltage (5-110v) thiab sijhawm ntev (5-30 feeb), xim oxide zaj duab xis nrog ib qho tuab ntawm 50-500nm yog tsim: tooj rau ntawm 5V, xiav ntawm 30v, thiab ntsuab ntawm 110V. Cov yeeb yaj kiab no tsis tsuas yog muab cov txiaj ntsig zoo nkauj tab sis kuj txhim kho txhim kho corrosion tsis kam. Kev nruab nrab ntawm ntsev ua pa tawm qhia tias anodized titanium hlab uas tsis muaj pob txha corrosion tom qab 720 teev, thaum tsis kho cov hnoos qeev no tom qab 48 teev.
Kev tiv thaiv micro arc: superior tiv thaiv nrog cov yeeb yaj kiab ceramic
Raws li anodizing, lub voltage tau nce mus rau 200500v, tsim micro-compating micrc tso tawm saum npoo, hauv-situ sib sau ua yeeb yam ceramic ua rau 300 μm tuab. Cov yeeb yaj kiab no, muaj los ntawm kev sib xyaw ntawm anatase thiab rutile tio₂, khav theeb ntawm HV1200 thiab hnav tsis kam Yim npaug ntau dua li ntawm substrate. Ib pab neeg tshawb fawb ntawm Seoul National University hauv South Kauslim tau tsim muaj micro-arc oxidation zaj duab xis hauv calcium-phosphorus electrolyte. Tom qab kev kho mob hydrousmal, cov yeeb zaj yeeb yaj kiab hloov mus rau txheej ntawm cov txheej txheem hydroxyapatite (HA). Tom qab kev nkag siab hauv cov kua dej simulated (sbf) rau xya hnub, HA Deposition mus txog 2.3 mg / cm / cm / cm / cm/oting pob txha cell adhesion thiab proliferation.
Composite Oxidation Technology: Kev ua haujlwm tshiab
Sib txuas ntawm cov txiaj ntsig ntawm anodic oxidation thiab cov txheej txheem me me, ib kauj ruam, anodic oxidation ntawm lub voltage qis (50v) cov ntaub ntawv ntom txheej; Tom qab ntawd, micro-arc oxidation ntawm lub siab voltage (400v) tsim ib txheej sab nraud sab nraud. Qhov kev sib xyaw ua ke no sib xyaw ua ke siab (hv1000) nrog thaj chaw siab tshwj xeeb (25 m² / g). Thaum siv los ua cov khoom siv roj ntsha lithium, nws tuaj yeem txhim kho them nqi thiab kev tawm haujlwm los ntawm 12% thiab txuas ntxiv lub neej ntawm 30%.
Kev Kho Mob Oxidation Zoo Tswjhwm Tswj: Los ntawm cov txheej txheem tsis mus kuaj cov qauv
Txhawm rau kom ntseeg tau qhov ua tau zoo ntawm oxidation kev kho mob yuav tsum tau tsim kom tsim, txheej txheem kev ua tiav, cov txheej txheem ua tiav, thiab kev sim ua tiav.
Qauv kev npaj daws teeb meem
Cov kev siv tshuaj ntxuav yuav tsum tau npaj tshiab, diluted nrog dej deionized, thiab ib qho corrosion inhibitor (xws li thiource-) yuav tsum tau ntxiv ntawm 0.5g / u txo qis substrate ploj. Lub ph ntawm anodizing electrolyte yuav tsum raug kuaj txhua hnub (tswj ntawm 6.0), thiab ib feem peb ntawm cov ntim yuav tsum muaj kev ruaj ntseg ion concentration. Yuav tsum tau nruab nrog lub kaw lus hluav taws xob hluav taws xob kom muaj qhov kub ntawm 25℃los tiv thaiv kev kub ntxhov hauv nroog uas yuav ua rau zaj duab xis tawg.
Saib Xyuas Cov Txheej Txheem Txheej Txheem
Qhia iot technology, sensors tau teeb tsa hauv cov khoom siv oxidation los saib xyuas voltage (qhov tseeb ± 0.5A (qhov tseeb ± 0.5 degree) hauv lub sijhawm tiag tiag. Tom qab siv cov kab ke no, ib qho chaw tsim aviation cov khoom lag luam tau txo nws cov khoom lag luam tsis zoo los ntawm 3.2% rau 0.5%, txuag Yuan hauv kev them nyiaj txhua xyoo.
Qhov ntsuas ntau txoj kev ntsuas ntawm cov khoom lag luam tas lawm
A metallographic microscope (500x magnification) is used to observe the cross-sectional morphology of the film layer to ensure the absence of defects such as cracks and holes. X-ray photoelectron spectroscopy (XPS) is used to analyze the film composition and verify that the calcium-phosphorus atomic ratio meets the bioactivity requirement (Ca/P = 1.67). A scratch tester (load 10N) is used to test the membrane-substrate bonding strength, with a critical load requirement of >30n. Txhua cov ntaub ntawv kuaj tau nkag mus rau hauv blockchain system rau kev ua kom zoo traceazebility thiab txheej txheem kev ua kom zoo.
Muaj ntau txoj hauv kev rau kev kho mob oxidation ntawm titanium hlab, thiab cov qauv tsim nyog tuaj yeem xaiv raws li cov kev xav tau. Seb puas siv anodizing ib txwm los yog ua kom muaj txiaj ntsig laser, ob lub hom phiaj los txhim kho kev ua tau zoo ntawm titanium hlab, yog li zoo lub neej zoo ntawm ntau yam kev lag luam.
