1. Matrix theem (theem loj) Nd2Fe14B
Nws yog tsim los ntawm cov tshuaj tiv thaiv peritectic nyob ib ncig ntawm 1200 degree thiab yog tib theem sib nqus hauv cov hlau. Cov khoom sib nqus zoo heev ntawm NdFeB cov hlau nplaum feem ntau yog los ntawm qhov siab saturation magnetization (uOMS=1.6T) thiab anisotropic teb (7.3T) ntawm Nd2Fe14B theem. Nws lub luag haujlwm tseem ceeb yog muab siab Ms thiab siab Ha.
2. Nd-nplua nuj theem (75% ~ 85%) NdFe (wt%)
Nws melting point yog 650 ~ 700 degree. Nws yog qhov kawg rau solidify nyob rau hauv lub alloy. Nws yog nyob nruab nrab ntawm cov nplej uas muaj zog thiab yog txheej nyias nyias uas npog cov theem matrix. Txawm hais tias nws yog theem tsis sib nqus, vim nws cov yam ntxwv qis melting point, nws yog dispersed thiab faib nyob ib ncig ntawm lub ntsiab theem thaum sintering. Nws tsis tsuas yog densifies lub cev sintered, tab sis kuj inhibits txoj kev loj hlob ntawm cov nplej thiab txhawb kev loj hlob ntawm coercive quab yuam. Yog li ntawd, Nws yog ib qho tseem ceeb thiab muab faib rau cov muaju.
3. Kev nplua nuj B theem
Feem ntau, qhov ntau me me thiab tsis tshua muaj txiaj ntsig ntawm cov khoom sib nqus. Tsim thaum cov ntsiab lus boron nyob rau hauv cov alloy tshaj li ib txwm muaj pes tsawg leeg ntawm Nd2Fe14B, nws tsis pab rau cov khoom sib nqus.
4.a- Fe
Nws cov ntsiab lus melting yog 1520 degree, uas yog theem nrog lub siab tshaj plaws melting point nyob rau hauv lub alloy. Nws yog thawj zaug uas tau muab tais tawm ntawm cov kua alloy. a-Fe yog ib theem magnetic mos. Nws lub neej ua rau txo qis ntawm theem tseem ceeb thiab nce qib ntawm neodymium-nplua nuj theem, rhuav tshem lub ntsiab theem. Qhov zoo tshaj plaws piv ntawm cov theem thiab lub neodymium-nplua nuj theem ua puas lub magnetic orientation ntawm lub ntsiab theem nplej, thiab kuj coarsens cov nplej nyob rau hauv lub zos cheeb tsam thaum lub sij hawm sintering txheej txheem, uas tsis tsuas deteriorates lub magnetic zog, tab sis kuj deteriorates cov qauv ntawm cov khoom. electroplated txheej, cuam tshuam cov nyhuv tiv thaiv.
Yog li, kev ntsuas yuav tsum raug coj los ntawm cov txheej txheem tsim khoom kom txo qis lossis tshem tawm cov tiam ntawm -Fe theem, xws li cov txheej txheem casting thiab txheej txheem quenching ceev.
