Qhov laj thawj tseem ceeb vim li cas NdFeB hlau nplaum yog qhov tsis zoo yog tshwm sim los ntawm lawv cov qauv siv lead ua thiab cov yam ntxwv sib xyaw.
NdFeB hlau nplaum yog intermetallic compounds, uas nws cov qauv siv lead ua yog hexagonal ze tshaj plaws packing (HCP), thiab muaj ntau neodymium. Cov qauv siv lead ua no thiab muaj pes tsawg leeg ua rau cov hlau nplaum NdFeB muaj cov yam ntxwv hauv qab no:
Brittle grain ciam teb: Lub interface ntawm cov nplej nyob rau hauv NdFeB hlau nplaum yog ib qho yooj yim los ua qhov pib ntawm brittle fracture, thiab cov kev ntxhov siab concentration thiab cov qauv tsis sib xws ntawm cov qoob loo ciam teb yuav ua rau tawg yooj yim.
High hardness: NdFeB hlau nplaum muaj ib tug siab hardness, nyob rau hauv qhov kev txiav txim ntawm sab nraud quab yuam, nws sab hauv siv lead ua qauv yog ib qho nyuaj rau tsim cov yas deformation, yog li nws muaj nkig puas.
Tsawg toughness: Vim yog cov qauv siv lead ua thiab cov yam ntxwv ntawm NdFeB hlau nplaum, lawv qhov toughness kuj tsawg, uas yog, muaj peev xwm nqus tau lub zog deformation tsis zoo, yog li nws yooj yim tawg thaum raug rau sab nraud quab yuam.
Yog li ntawd, thaum siv NdFeB hlau nplaum, yuav tsum tau them nyiaj mloog kom tsis txhob muaj kev sib tsoo, kev vibration thiab ceev ceev thauj khoom kom txo tau txoj kev pheej hmoo ntawm nkig puas. Nyob rau tib lub sijhawm, thaum tsim khoom thiab ua cov hlau nplaum NdFeB, nws tseem yuav tsum tau ua cov txheej txheem tsim nyog los tswj cov kab lis kev cai thiab kev ntxhov siab faib los txhim kho nws cov tawv thiab brittleness.
