Anti-radiation Performance Of Rare Earth Permanent Magnets

Tsis tshua muaj lub ntiaj teb cov hlau nplaum nyob ruaj khov feem ntau tau txais kev pabcuam hauv cov cuab yeej tsom ntawm cov kab hluav taws xob hauv lub accelerator, synchrotron thiab spectroradiometer. Lub ntiaj teb tsis tshua muaj cov hlau nplaum ruaj khov tuaj yeem nthuav tawm cov hluav taws xob ntawm -ray, neutron lossis lwm yam khoom siv hluav taws xob thiab ntau npaum li cas ntawm cosmic rays kuj muaj nyob rau hauv qhov chaw. Qhov tseeb, lub zog ntawm cov cosmic rays tuaj yeem ua tiav 10²⁰eV, thiab tag nrho cov-pervasive high-zog rays yuav cuam tshuam nrog cov khoom sib nqus cov atoms, ces ua rau cov lattice vibration thiab kub ntawm hlau nplaum, yog li ua rau demagnetizing. Yog li ntawd, tsis tshua muaj lub ntiaj teb cov hlau nplaum ruaj khov rau undulator ntawm high-zog nuclear teb los yog kiv cua ntawm aerospace teb muaj qhov yuav tsum tau muaj nyob rau hauv high-temperature resistance thiab anti-radiation kev ua tau zoo.

Nws yuav tsum raug sau tseg tias qee qhov kev tshawb fawb tseem ceeb tau qhia tias -ray irradiation yeej tsis cuam tshuam rau cov khoom sib nqus ntawm lub ntiaj teb tsis tshua muaj cov hlau nplaum ruaj khov yog tias cov hlau nplaum cov cua sov tuaj yeem nyob ruaj khov ntawm chav tsev kub. Tab sis qhov tseeb, cov hlau nplaum tas mus li tsis tuaj yeem nyob hauv chav sov. Raws li kev sim cov ntaub ntawv los ntawm Electron Energy Corporation (EEC), kev ua haujlwm tiv thaiv hluav taws xob ntawm Samarium Cobalt hlau nplaum zoo dua li cov hlau nplaum Neodymium. Thaum neutron flux kuj qis, qhov kev ua tau zoo sib nqus tuaj yeem rov qab tau tom qab rov sib nqus, thiab muaj zog irradiation yuav ua rau muaj kev puas tsuaj mus tas li ntawm microstructure ntawm Neodymium hlau nplaum, yog li txo nws cov coercivity thiab remanence. Qhov tseeb, irradiation kev puas tsuaj yog tshwm sim los ntawm cov nyhuv tshav kub, tsis tshwm sim ncaj qha los ntawm metallurgical kev puas tsuaj. Qhov kub sab hauv ntawm cov hlau nplaum tas mus li yuav nce nrog nce neutron flux. Yog li ntawd, Neodymium hlau nplaum yuav poob nws cov hlau nplaum ib zaug nyob rau hauv qhov kub siab tshaj nws curie kub. Sm (CoFeCuZr)_xyog qhov kev xaiv zoo tshaj plaws rau qhov chaw thov.