●Sintered NdFeB maginitoakhala akugwiritsidwa ntchito kwambiri chifukwa cha mphamvu zawo zamaginito. Komabe, kulephera kwa dzimbiri kwa maginito kumalepheretsa kugwiritsidwa ntchito kwawo kwa malonda, ndipo zokutira pamwamba ndizofunikira. Zovala zomwe zimagwiritsidwa ntchito kwambiri pano zikuphatikiza electroplating Ni-zokutira zochokera, electroplating Zn-zokhazikikazokutira, komanso zokutira za electrophoretic kapena spray epoxy. Koma ndi kupita patsogolo kosalekeza kwaukadaulo, zofunika zokutiraof Ndi FeBzikuchulukirachulukira, ndipo zigawo ochiritsira electroplating nthawi zina sangathe kukwaniritsa zofunika. Chophimba cha Al choyikidwa pogwiritsa ntchito ukadaulo wa vapor deposition (PVD) uli ndi mawonekedwe abwino kwambiri.
● Njira za PVD monga sputtering, ion plating, ndi evaporation plating zingapeze zokutira zodzitetezera. Table 1 imatchula mfundo ndi makhalidwe kuyerekeza kwa electroplating ndi sputtering njira.
Table 1 Makhalidwe oyerekeza pakati pa electroplating ndi sputtering njira
Sputtering ndi chodabwitsa chogwiritsa ntchito tinthu tating'onoting'ono tamphamvu kwambiri kuti tiphulitse malo olimba, kuchititsa maatomu ndi mamolekyu pamalo olimba kuti asinthane mphamvu ya kinetic ndi tinthu tambiri tambiri timeneti, potero akutuluka kuchokera pamalo olimba. Anapezeka koyamba ndi Grove mu 1852. Malingana ndi nthawi yake ya chitukuko, pakhala pali sputtering yachiwiri, sputtering apamwamba, ndi zina zotero. Komabe, chifukwa otsika sputtering dzuwa ndi zifukwa zina, si ankagwiritsa ntchito mpaka 1974 pamene Chapin anatulukira moyenera magnetron sputtering, kupanga mkulu-liwiro ndi otsika kutentha sputtering zenizeni, ndi magnetron sputtering luso anali wokhoza kukhala mofulumira. Magnetron sputtering ndi njira yopopera yomwe imayambitsa minda yamagetsi panthawi ya sputtering kuti iwonjezere kuchuluka kwa ionization mpaka 5% -6%. Chithunzi chojambula cha magnetron sputtering chikuwonetsedwa mu Chithunzi 1.
Chithunzi 1 Mfundo yachidule ya magnetron sputtering
Chifukwa cha kukana bwino kwa dzimbiri, Al ❖ kuyanika ndiion mpweyadeposition (IVD) yagwiritsidwa ntchito ndi Boeing ngati choloweza m'malo mwa electroplating Cd. Pamene ntchito sintered NdFeB, imakhala ndi zabwino izi:
1.High mphamvu zomatira.
Mphamvu zomatira za Al ndiNdi FeBzambiri ≥ 25MPa, pamene zomatira mphamvu wamba electroplated Ni ndi NdFeB ndi za 8-12MPa, ndi zomatira mphamvu ya electroplated Zn ndi NdFeB pafupifupi 6-10MPa. Mbali imeneyi zimapangitsa Al/NdFeB oyenera ntchito iliyonse imene imafunika mkulu zomatira mphamvu. Monga momwe chithunzi 2 chikuwonetsedwera, mutatha kusinthana maulendo 10 pakati pa (-196 ° C) ndi (200 ° C), mphamvu yomatira ya Al yokutira imakhalabe yabwino kwambiri.
Chithunzi cha 2 chithunzi cha Al/NdFeB pambuyo pa kusintha kwa 10 pakati pa (-196 ° C) ndi (200 ° C)
2. Zilowerereni mu guluu.
Chophimba cha Al chili ndi hydrophilicity ndipo mbali yolumikizira ya guluu ndi yaying'ono, popanda chiopsezo chogwa. Chithunzi 3 chikuwonetsa 38mN pamwambamphamvu madzi. Madzi oyesera amafalikira kwathunthu pamwamba pa zokutira za Al.
Figure 3. mayeso a 38mN pamwambakukangana
3.Maginito a maginito a Al ndi otsika kwambiri (pafupifupi permeability: 1.00) ndipo sichidzayambitsa kutetezedwa kwa maginito.
Izi ndizofunikira makamaka pakugwiritsa ntchito maginito ang'onoang'ono pagawo la 3C. Kuchita kwapamwamba ndikofunikira kwambiri. Monga momwe chithunzi 4 chasonyezedwera pa gawo lachitsanzo la D10 * 10, mphamvu ya Al ❖ kuyanika pa maginito ndi yochepa kwambiri.
Chithunzi 4 Kusintha kwa maginito katundu wa sintered NdFeB pambuyo poyika PVD Al ❖ kuyanika ndi electroplating NiCuNi ❖ kuyanika pamwamba.
4.Kufanana kwa makulidwe kuli bwino kwambiri
Chifukwa amayikidwa mu mawonekedwe a ma atomu ndi magulu a atomiki, makulidwe a zokutira za Al amatha kuwongolera, ndipo kufanana kwa makulidwe ake ndikwabwino kwambiri kuposa zokutira kwa electroplating. Monga momwe tawonetsera pa Chithunzi 5, zokutira za Al zili ndi makulidwe a yunifolomu komanso mphamvu yabwino yomatira.
Chithunzi5 mtanda gawo la Al/NdFeB
5.Njira yoyika ukadaulo wa PVD ndiyotetezeka kwathunthu ku chilengedwe ndipo palibe vuto loipitsa chilengedwe.
Malinga ndi zofunikira zofunikira, ukadaulo wa PVD umathanso kuyika ma multilayers, monga Al/Al2O3 ma multilayer omwe ali ndi mphamvu zoteteza ku dzimbiri komanso zokutira za Al/AlN zokhala ndi makina abwino kwambiri. Monga momwe tawonetsera pa Chithunzi 6, mawonekedwe amtundu wa Al/Al2O3 multilayer coating.
Fgawo 6Mtanda gawomwa Al/Al2O3 multilyaers
Pakadali pano, zovuta zazikulu zomwe zimalepheretsa kukula kwa zokutira za Al pa NdFeB ndi:
(1) Mbali zisanu ndi imodzi za maginito zimayikidwa mofanana. Chofunikira pachitetezo cha maginito ndikuyika ❖ kuyanika kofanana pamwamba pa maginito, zomwe zimafuna kuthetsa kuzungulira kwa maginito atatu-dimensional mu processing batch kuonetsetsa kusasinthika kwa ❖ kuyanika;
(2) Njira yochotsera nsalu. M'magulu akuluakulu opanga mafakitale, ndizosapeweka kuti zinthu zosayenera zidzawonekera. Choncho, m'pofunika kuchotsa osayenera Al ❖ kuyanika nditetezansoizo popanda kuwononga ntchito ya NdFeB maginito;
(3) Malinga ndi malo enieni ntchito, sintered NdFeB maginito ndi magiredi angapo ndi akalumikidzidwa. Chifukwa chake, ndikofunikira kuphunzira njira zodzitetezera zoyenera zamagiredi ndi mawonekedwe osiyanasiyana;
(4) Kupanga zida zopangira. Njira yopanga iyenera kuonetsetsa kuti ikupanga bwino, yomwe imafuna kupanga zida za PVD zoyenera chitetezo cha maginito cha NdFeB ndikuchita bwino kwambiri;
(5) Kuchepetsa mtengo waukadaulo wa PVD ndikuwongolera mpikisano wamsika;
Pambuyo pazaka za kafukufuku ndi chitukuko cha mafakitale. Hangzhou Magnet Power Technology yatha kupereka zinthu zambiri za PVD Al kwa makasitomala. Monga momwe tawonetsera pa Chithunzi 7, zithunzi zoyenera zamalonda.
Chithunzi 7 Al TACHIMATA NdFeB maginito ndi akalumikidzidwa zosiyanasiyana.
Nthawi yotumiza: Nov-22-2023
