Neodymium Iron Boron Magnets yog ib qho ntawm cov khoom lag luam muaj zog tshaj plaws nyob rau niaj hnub no. Cov hlau nplaum tsis tshua muaj hauv ntiaj teb no tuaj yeem ncav cuag 10 npaug zog dua li cov hlau nplaum uas muaj zog tshaj plaws. NdFeB hlau nplaum feem ntau yog tsim los siv ib qho ntawm ob hom kev sib koom ua ke, cov hlau nplaum sib txuas (compression, txhaj tshuaj, extrusion lossis calendaring molding), thiab sintered hlau nplaum (hmoov hlau metallurgy, PM txheej txheem). NdFeB hlau nplaum feem ntau yog siv rau hauv cov khoom uas xav tau cov hlau nplaum ruaj khov xws li hard disk drives rau khoos phis tawj, hluav taws xob motors hauv cov khoom siv cordless, thiab fasteners. Rau cov khoom siv kho mob siv tshiab siv cov hlau nplaum muaj zog no tau tshwm sim. Piv txwv li, catheter navigation, qhov twg cov hlau nplaum tuaj yeem muab tso rau hauv lub hau ntawm lub catheter los ua ke thiab tswj los ntawm cov tshuab magnetic sab nraud rau kev tswj thiab deflect muaj peev xwm.
Lwm yam kev siv hauv kev kho mob suav nrog kev qhia txog kev qhib magnetic resonance imaging (MRI) scanners uas yog siv los ua daim ntawv qhia thiab duab lub cev, ua lwm txoj hauv kev siv cov hlau nplaum superconducting uas feem ntau siv coils ntawm hlau los tsim cov hlau nplaum. Kev siv ntxiv hauv cov cuab yeej siv kho mob suav nrog, kev cog qoob loo ntev thiab luv luv, thiab cov cuab yeej cuam tshuam tsawg kawg nkaus. Qee qhov kev siv tsawg heev rau neodymium hlau boron hlau nplaum yog cov khoom siv endoscopic rau ntau yam txheej txheem suav nrog; gastroesophageal, gastrointestinal, skeleton, nqaij thiab pob qij txha, plawv, thiab neural.
Ferrite hlau nplaum, neodymium hlau nplaum lossis txawm tias cov hlau nplaum sib nqus yog siv rau ntau yam kev siv hauv tshuab, hauv kev lag luam thiab tseem siv rau kev kho mob. Yuav tsum tau muab cov hlau nplaum nrog lub ntsej muag tiv thaiv corrosion, "txheej" rau cov hlau nplaum. Plating neodymium hlau nplaum yog txheej txheem tseem ceeb los tiv thaiv cov hlau nplaum tiv thaiv corrosion. Lub substrate NdFeB (Neodymium, Hlau, Boron) yuav oxidize sai yam tsis muaj txheej tiv thaiv. Hauv qab no yog cov npe ntawm plating / txheej thiab lawv cov plaub rau koj siv.
| Kev kho saum npoo | ||||||
| Txheej | Txheej Thickness (μm) | Xim | Ua haujlwm kub (℃) | PCT (h) | SST (h) | Nta |
| Xiav-White Zinc | 5-20 | Xiav-dawb | ≤160 | - | ≥48 | Anodic txheej |
| Xim Zinc | 5-20 | Zaj sawv xim | ≤160 | - | ≥72 | Anodic txheej |
| Ni | 10-20 | Nyiaj | ≤390 | ≥96 | ≥12 | Kub kub kuj |
| Ni+Cu+Ni | 10-30 | Nyiaj | ≤390 | ≥96 | ≥48 | Kub kub kuj |
| Lub tshuab nqus tsev aluminizing | 5-25 | Nyiaj | ≤390 | ≥96 | ≥96 | Kev sib xyaw ua ke zoo, siab kub ua haujlwm |
| Electrophoretic epoxy | 15-25 | Dub | ≤200 | - | ≥360 | Rwb thaiv tsev, zoo sib xws ntawm thickness |
| Ni + Cu + Epoxy | 20-40 | Dub | ≤200 | ≥480 | ≥720 | Rwb thaiv tsev, zoo sib xws ntawm thickness |
| Aluminium + Epoxy | 20-40 | Dub | ≤200 | ≥480 | ≥504 | Rwb thaiv tsev, muaj zog tiv thaiv ntsev tsuag |
| Epoxy tshuaj tsuag | 10-30 | Dub, Grey | ≤200 | ≥192 | ≥504 | Rwb thaiv tsev, kub tsis kam |
| Phosphating | - | - | ≤250 | - | ≥0.5 | Tus nqi qis |
| Passivation | - | - | ≤250 | - | ≥0.5 | Tsawg nqi, invironment tus phooj ywg |
| Tiv tauj peb cov kws tshaj lij rau lwm cov txheej txheem! | ||||||
NiCuNi txheej: Cov nickel txheej yog tsim los ntawm peb txheej, npib tsib xee-tooj-nickel. Hom txheej txheej no yog siv dav tshaj plaws thiab muab kev tiv thaiv corrosion ntawm cov hlau nplaum nyob rau sab nraum zoov. Cov nqi ua haujlwm tsawg. Qhov siab tshaj plaws ua haujlwm kub yog kwv yees li 220-240ºC (nyob ntawm qhov ua haujlwm siab tshaj plaws ntawm cov hlau nplaum). Hom txheej no yog siv rau hauv tshuab, tshuab hluav taws xob, khoom siv kho mob, sensors, kev siv tsheb, kev tuav pov hwm, cov txheej txheem nyias zaj duab xis tso tawm thiab cov twj tso kua mis.
Dub npib tsib xee: Cov khoom ntawm cov txheej txheem no zoo ib yam li cov txheej txheem nickel, nrog qhov sib txawv ntawm cov txheej txheem ntxiv yog tsim, cov xim dub nickel sib dhos. Cov khoom zoo ib yam li cov pa nickel plating; nrog rau qhov tshwj xeeb uas cov txheej no yog siv rau hauv cov ntawv thov uas yuav tsum tau ua kom pom qhov pom ntawm cov khoom tsis ci.
Kub: Hom txheej txheej no feem ntau siv rau hauv kev kho mob thiab tseem tsim nyog siv rau kev sib cuag nrog tib neeg lub cev. Muaj kev pom zoo los ntawm FDA (Food and Drug Administration). Nyob rau hauv lub kub txheej muaj ib tug sub-layer ntawm Ni-Cu-Ni. Qhov siab tshaj plaws ua hauj lwm kub kuj yog txog 200 ° C. Ntxiv rau qhov chaw ntawm cov tshuaj, kub plating kuj yog siv rau cov hniav nyiaj hniav kub thiab cov hniav nyiaj hniav kub.
Zinc: Yog tias qhov kub ua haujlwm siab tshaj plaws tsawg dua 120 ° C, cov txheej txheej no tsim nyog. Cov nqi qis dua thiab cov hlau nplaum tiv thaiv corrosion hauv huab cua qhib. Nws tuaj yeem ua rau cov hlau, txawm tias yuav tsum tau siv cov nplaum tshwj xeeb. Lub zinc txheej yog tsim los muab cov kev tiv thaiv kev tiv thaiv rau cov hlau nplaum uas tsis tshua muaj kev ua haujlwm kub thiab tsis muaj zog.
Parylene: Cov txheej no kuj tau pom zoo los ntawm FDA. Yog li ntawd, lawv tau siv rau kev siv kho mob hauv tib neeg lub cev. Qhov siab tshaj plaws ua haujlwm kub yog kwv yees li 150 ° C. Cov qauv molecular muaj lub nplhaib-zoo li cov hydrocarbon tebchaw uas muaj H, Cl thiab F. Nyob ntawm cov qauv molecular, muaj ntau hom sib txawv xws li: Parylene N, Parylene C, Parylene D thiab Parylene HT.
Epoxy: Ib txheej uas muab kev tiv thaiv zoo tiv thaiv ntsev thiab dej. Nws muaj qhov adhesion zoo heev rau cov hlau, yog tias cov hlau nplaum nplaum nrog cov nplaum tshwj xeeb haum rau cov hlau nplaum. Qhov siab tshaj plaws ua haujlwm kub yog kwv yees li 150 ° C. Cov epoxy txheej feem ntau yog xim dub, tab sis lawv tuaj yeem ua dawb. Cov ntawv thov tuaj yeem pom nyob rau hauv maritime sector, engines, sensors, neeg siv khoom thiab automotive sector.
Magnets txhaj rau hauv yas: los yog hu ua over-moulded. Nws cov yam ntxwv tseem ceeb yog nws cov kev tiv thaiv zoo heev ntawm cov hlau nplaum tiv thaiv kev tawg, cuam tshuam thiab corrosion. Cov txheej tiv thaiv muab kev tiv thaiv dej thiab ntsev. Qhov siab tshaj plaws ua haujlwm kub nyob ntawm cov yas siv (acrylonitrile-butadiene-styrene).
Tsim PTFE (Teflon): Zoo li cov tshuaj txhaj / yas txheej kuj muab kev tiv thaiv zoo heev ntawm cov hlau nplaum tiv thaiv kev tawg, cuam tshuam thiab corrosion. Cov hlau nplaum tiv thaiv cov dej noo, dej thiab ntsev. Qhov siab tshaj plaws ua haujlwm kub yog nyob ib ncig ntawm 250 ° C. Cov txheej no yog siv rau hauv kev lag luam kho mob thiab hauv kev lag luam khoom noj.
Roj Hmab: Cov roj hmab txheej tiv thaiv zoo kawg nkaus los ntawm kev tawg thiab cuam tshuam thiab txo qis corrosion. Cov khoom siv roj hmab ua tau zoo heev hauv kev ua haujlwm ntawm cov hlau. Qhov siab tshaj plaws ua haujlwm kub yog nyob ib ncig ntawm 80-100 ° C. Lub lauj kaub hlau nplaum nrog cov roj hmab txheej yog cov khoom siv pom tseeb tshaj plaws thiab dav siv.
Peb muab peb cov neeg siv khoom nrog cov lus qhia thiab kev daws teeb meem ntawm kev tiv thaiv koj cov hlau nplaum thiab kom tau txais daim ntawv thov zoo tshaj plaws ntawm cov hlau nplaum. Tiv tauj peb thiab peb yuav zoo siab los teb koj cov lus nug.
