Ingabe omazibuthe be-samarium cobalt bangasetshenziswa iminyaka engaphezu kweshumi——ukuzinza kwesikhathi eside kwe-samarium cobalt ekushiseni okuphezulu

Ukuzinza kwesikhathi eside kozibuthe kuwukukhathazeka kwawo wonke umsebenzisi. Ukuzinza kozibuthe be-samarium cobalt (SmCo) kubaluleke kakhulu endaweni yabo yokusebenzela enokhahlo. Ngo-2000, u-Chen^[1]kanye no-Liu^[2]et al., funda ukwakheka kanye nesakhiwo se-SmCo enezinga lokushisa eliphezulu, futhi yathuthukisa omazibuthe be-samarium-cobalt abangangeni lokushisa okuphezulu. Izinga lokushisa eliphezulu lokusebenza (T_ubuningi) kozibuthe be-SmCo banyuswe kusuka ku-350°C kuya ku-550°C. Ngemva kwalokho, u-Chen et al. ithuthukise ukumelana ne-oxidation kwe-SmCo ngokufaka i-nickel, i-aluminium nezinye izinto zokumboza kuzibuthe ze-SmCo.

Ngo-2014, uDkt. Mao Shoudong, umsunguli we "MagnetPower", wafunda ngokuhlelekile ukuzinza kwe-SmCo emazingeni okushisa aphezulu, futhi imiphumela yanyatheliswa ku-JAP.^[3]. Imiphumela ejwayelekile imi kanje:

1. NiniI-SmCoisesimweni sokushisa okuphezulu (500°C, emoyeni), kulula ukwenza isendlalelo sokuwohloka phezulu. Isendlalelo sokuwohloka ngokuyinhloko sakhiwe isikali sangaphandle (i-Samarium iphelile) kanye nongqimba lwangaphakathi (ama-oxide amaningi). Isakhiwo esiyisisekelo samamagnethi e-SmCo sacekelwa phansi ngokuphelele ungqimba lokuwohloka. Njengoba kuboniswe kuMfanekiso 1 nakuMfanekiso 2.

Fig.1. Ama-micrographs optical we-Sm₂Co₁₇ozibuthe isothermal ephathwa emoyeni at 500 °C izikhathi ezahlukene. Izendlalelo zokuwohloka ngaphansi kwezindawo (a) ezihambisanayo kanye (b) ne-perpendicular ku-axis engu-c.

Fig.2. I-BSE micrograph nezinto ze-EDS ziskena ngomugqa kuyo yonke i-Sm₂Co₁₇ozibuthe be-isothermal baphathwa emoyeni ku-500 °C amahora angu-192.

2. Ukwakheka okuyinhloko kwesendlalelo sokuwohloka kuthinta kakhulu izici kazibuthe ze-SmCo, njengoba kuboniswe kuMfanekiso 3. Izendlalelo zokuwohloka zazakhiwe ngokuyinhloko isixazululo esiqinile se-Co(Fe), i-CoFe2O4, i-Sm2O3, ne-ZrOx ezingqimbeni zangaphakathi kanye ne-Fe3O4, I-CoFe2O4, ne-CuO esikalini sangaphandle. I-Co(Fe), i-CoFe2O4, ne-Fe3O4 zisebenze njengezigaba ezinozibuthe ezithambile uma ziqhathaniswa nesigaba sikazibuthe esiqinile somazibuthe abamaphakathi abangathintekile be-Sm2Co17. Ukuziphatha kokwehliswa kwesithunzi kufanele kulawulwe.

Umfanekiso 3. Amajika kazibuthe we-Sm₂Co₁₇ozibuthe isothermal ephathwa emoyeni at 500 °C izikhathi ezahlukene. Izinga lokushisa lokuhlola lamajika kazibuthe lingu-298 K. Inkambu yangaphandle engu-H ihambisana nokuqondanisa kwe-c-eksisi ye-Sm.₂Co₁₇ozibuthe.

3. Uma ama-coatings anokumelana ne-oxidation ephezulu afakwa ku-SmCo ukuze athathe indawo yezingubo zokuqala ze-electroplating, inqubo yokuwohloka kwe-SmCo ingavinjelwa kakhulu futhi ukuzinza kwe-SmCo kungathuthukiswa, njengoba kuboniswe kuMfanekiso 4. Ukusetshenziswa kwe-SmCoNOMA ukunamathelakuvimbela kakhulu ukwanda kwesisindo se-SmCo kanye nokulahlekelwa kwezakhiwo kazibuthe.

Fig.4 ukwakheka kokumelana ne-oxidation NOMA ukunamathela ku-Sm₂Co₁₇uzibuthe.

"I-MagnetPower" kusukela ngaleso sikhathi yenze izivivinyo zokuzinza kwesikhathi eside (~ 4000hours) emazingeni okushisa aphezulu, okungahlinzeka ngereferensi yokuzinza kozibuthe be-SmCo ukuze basetshenziswe esikhathini esizayo emazingeni okushisa aphezulu.

Ngo-2021, ngokusekelwe esimisweni esiphezulu sezinga lokushisa lokusebenza, i-“MagnetPower” ithuthukise uchungechunge lwamabanga ukusuka ku-350°C kuya ku-550°C.T uchungechunge）. Lawa mabanga anganikeza ukukhetha okwanele kokusetshenziswa kwe-SmCo yezinga lokushisa eliphezulu, futhi izici kazibuthe zinenzuzo enkulu. Njengoba kukhonjisiwe kuMfanekiso 5. Sicela ubheke ikhasi lewebhu ukuze uthole imininingwane:https://www.magnetpower-tech.com/t-series-sm2co17-smco-magnet-supplier-product/

Fig.5 Omazibuthe bezinga lokushisa eliphezulu be-SmCo (T series) ye-“MagnetPower”

IZIPHETHO

1. Njengozibuthe bomhlaba obungajwayelekile ozinzile kakhulu, i-SmCo ingasetshenziswa ekushiseni okuphezulu (≥350°C) isikhathi esifushane. Izinga lokushisa eliphezulu le-SmCo (uchungechunge lwe-T) lingasetshenziswa ku-550°C ngaphandle kokuyeka kazibuthe okungahlehliseki.

2. Kodwa-ke, uma amamagnethi e-SmCo asetshenziswa ekushiseni okuphezulu (≥350 ° C) isikhathi eside, indawo engaphezulu ijwayele ukukhiqiza isendlalelo sokuwohloka. Ukusetshenziswa kwe-anti-oxidation coating kungaqinisekisa ukuzinza kwe-SmCo ekushiseni okuphezulu.

Ireferensi

[1] CHChen, IEEE Transactions on Magnetics, 36, 3291-3293, (2000);

[2] JF Liu, Journal of Applied Physics, 85, 2800-2804, (1999);

[3] Shoudong Mao, Journal of Applied Physics, 115, 043912,1-6 (2014)