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Saini i totonu pe Fausia se Teugatupe
Aneodymium maneta(e lauiloa foi oNdFeB,NIBpeNeomaneta) o le ituaiga sili ona fa'aaogainamaneta ose lalolagi.O le amaneta tumaufaia mai seu'ameaoneodymium,uamea, maborone fausia ai le Nd2Fe14Btetragonalfausaga tioata.Na atiina ae tutoatasi i le 1984 eGeneral MotorsmaSumitomo Special Metals, neodymium maneta o le ituaiga sili ona malosi o le maneta tumau avanoa faapisinisi.E mafai ona fa'avasegaina maneta NdFeB e pei o sintered po'o fusifusia, e fa'atatau i le gaosiga o lo'o fa'aogaina.Ua latou suia isi ituaiga o maneta i le tele o talosaga i oloa faʻaonaponei e manaʻomia ai maneta tumau malosi, e pei oafi eletisei meafaigaluega e leai ni uaea,ta'avale mālosima fa'amau fa'amau.
Meatotino
togi
Neodymium maneta e fa'avasegaina e tusa ai ma latouoloa malosi aupito maualuga, lea e faatatau i lefe'avea'i manetagaluega faatino ile iunite voluma.O tau maualuluga e ta'u mai ai maneta malolosi.Mo maneta NdFeB sintered, o loʻo i ai se faʻavasegaga faʻavaomalo faʻavaomalo.O latou tau e amata mai le N28 i le N55.O le mataitusi muamua N i luma o tau e puupuu mo le neodymium, o lona uiga sintered NdFeB maneta.O mataitusi o lo'o mulimuli i tau o lo'o fa'aalia ai le fa'amalositino ma le maualuga o le vevela o le fa'agaoioiga (fa'atasi lelei ma leCurie vevela), lea e amata mai le faaletonu (e oo atu i le 80 °C po o le 176 °F) i le TH (230 °C po o le 446 °F).
Vasega o maneta NdFeB ua fa'asala:
- N30 – N55
- N30M – N50M
- N30H – N50H
- N30SH – N48SH
- N30UH – N42UH
- N28EH – N40EH
- N28TH – N35TH
Mea fa'amaneta
O nisi o mea taua e fa'aaogaina e fa'atusatusa ai maneta tumau o:
- Toetoeaina(Br), lea e fuaina ai le malosi o le maneta.
- Fa'amalosi(Hci), o mea e tete'e atu i le demagnetized.
- Malosiaga oloa gaosi(BHmaualuga), le mamafa o le malosi maneta, faʻaalia i le maualuga o le tau omaneta fe'avea'i mātele(B) taimimalosi fa'amaneta(H).
- Curie vevela(TC), le vevela lea e mou atu ai le maneta o mea.
Neodymium maneta e maualuga atu le tumau, e sili atu le maualuga o le coercivity ma le malosi, ae masani ona maualalo le vevela Curie nai lo isi ituaiga o maneta.Fa'apitoa neodymium maneta aloia e aofia aifa'ama'imadysprosiumua atiaeina e maualuga atu le vevela Curie, e mafai ai ona latou gafatia le maualuga o le vevela. O le laulau o lo'o i lalo o lo'o fa'atusatusaina ai le fa'atinoga o maneta neodymium ma isi ituaiga maneta tumau.
Fa'aletino ma mea fa'ainisinia
| Meatotino | Neodymium | Sm-Co |
|---|---|---|
| Toetoeaina(T) | 1–1.5 | 0.8–1.16 |
| Fa'amalosi(MA/m) | 0.875–2.79 | 0.493–2.79 |
| Toe fa'afo'isia le mafai | 1.05 | 1.05–1.1 |
| Fa'atasi o le vevela o le tumau (%/K) | −(0.12–0.09) | −(0.05–0.03) |
| Fa'atasi o le vevela o le fa'amalosi (%/K) | −(0.65–0.40) | −(0.30–0.15) |
| Curie vevela(°C) | 310–370 | 700–850 |
| Malosi (g/cm3) | 7.3–7.7 | 8.2–8.5 |
| Coefficient fa'alauteleina vevela, tutusa ma le maneta (1/K) | (3–4)×10−6 | (5–9)×10−6 |
| Coefficient fa'alauteleina vevela, fa'asaga i le maneta (1/K) | (1–3)×10−6 | (10–13)×10−6 |
| Malosi fa'apa'u(N/mm2) | 200–400 | 150–180 |
| Malosi fa'amalosi(N/mm2) | 1000–1100 | 800–1000 |
| Malosi fa'asa(N/mm2) | 80–90 | 35–40 |
| Vickers maaa(HV) | 500–650 | 400–650 |
| Eletiseteteega(Ω·cm) | (110–170)×10−6 | (50–90)×10−6 |
Taimi meli: Iuni-05-2023