Dogon kwanciyar hankali na maganadisu damuwa ne na kowane mai amfani. Ƙarfafawar samarium cobalt (SmCo) maganadiso shine mafi mahimmanci don yanayin aikace-aikacen su mai tsanani. A cikin 2000, Chen[1]da Liu[2]et al., nazarin abun da ke ciki da tsarin babban zafin jiki na SmCo, kuma sun ɓullo da ma'aunin zafi da zafi-resistant samarium-cobalt maganadiso. Matsakaicin zafin aiki (Tmax) na SmCo maganadiso an ƙara daga 350°C zuwa 550°C. Bayan haka, Chen et al. inganta iskar shaka juriya na SmCo ta ajiye nickel, aluminum da sauran coatings a kan SmCo maganadiso.
A cikin 2014, Dokta Mao Shoudong, wanda ya kafa "MagnetPower", yayi nazari akai-akai akan kwanciyar hankali na SmCo a yanayin zafi mai zafi, kuma an buga sakamakon a JAP.[3]. Sakamakon gamayya sune kamar haka:
1. LokacinSmCoyana cikin yanayin zafi mai zafi (500 ° C, iska), yana da sauƙi don samar da ƙarancin lalacewa a saman. Layin lalata ya ƙunshi ma'auni na waje (Samarium ya ƙare) da Layer na ciki (yawan oxides). Asalin tsarin maganadisu na SmCo ya lalace gaba ɗaya a cikin ɓangarorin lalata. Kamar yadda aka nuna a Figure 1 da Figure 2.
Hoto.1. Na gani micrographs na Sm2Co17maganadiso isothermal bi da a cikin iska a 500 ° C na lokuta daban-daban. Lalacewar yadudduka a ƙarƙashin filaye waɗanda suke (a) layi ɗaya da (b) daidai gwargwado zuwa c-axis.
Hoto.2. BSE micrograph da EDS abubuwan binciken layi-scan a fadin Sm2Co17maganadisu isothermal bi da a cikin iska a 500 ° C na 192 h.
2. Babban samuwar da lalata Layer muhimmanci rinjayar Magnetic Properties na SmCo, kamar yadda aka nuna a cikin Figure 3. The lalata yadudduka aka yafi hada da Co (Fe) m bayani, CoFe2O4, Sm2O3, da ZrOx a ciki yadudduka da Fe3O4, CoFe2O4, da CuO a cikin ma'auni na waje. Co(Fe), CoFe2O4, da Fe3O4 sun yi aiki azaman matakan maganadisu mai laushi idan aka kwatanta da lokacin maganadisu mai wuya na tsakiyar Sm2Co17 maganadisu. Yakamata a sarrafa halin lalata.
Hoto 3. Matsalolin maganadisu na Sm2Co17maganadiso isothermal bi da a cikin iska a 500 ° C na lokuta daban-daban. Matsakaicin gwajin zafin jiki na magnetization shine 298 K. Filin waje na H daidai yake da daidaitawar c-axis na Sm2Co17maganadisu.
3. Idan coatings da high hadawan abu da iskar shaka juriya da aka ajiye a kan SmCo don maye gurbin na asali electroplating coatings, da ƙasƙanci tsari na SmCo za a iya mafi muhimmanci hana da kwanciyar hankali na SmCo za a iya inganta, kamar yadda aka nuna a cikin Figure 4. Aikace-aikace naKO shafimahimmanci yana hana haɓakar nauyin SmCo da asarar kaddarorin maganadisu.
Fig.4 tsarin juriya na iskar shaka OR shafi akan Sm2Co17maganadisu.
"MagnetPower" tun lokacin da aka gudanar da gwaje-gwaje na kwanciyar hankali na dogon lokaci (~ 4000hours) a yanayin zafi mai zafi, wanda zai iya samar da kwanciyar hankali na SmCo maganadiso don amfani da gaba a yanayin zafi.
A cikin 2021, dangane da matsakaicin matsakaicin yanayin zafin aiki, "MagnetPower" ya haɓaka jerin maki daga 350 ° C zuwa 550 ° C (T jerin). Waɗannan maki na iya samar da isassun zaɓuɓɓuka don aikace-aikacen SmCo mai zafin jiki, kuma abubuwan magnetic sun fi fa'ida. Kamar yadda aka nuna a hoto na 5. Da fatan za a duba shafin yanar gizon don cikakkun bayanai:https://www.magnetpower-tech.com/t-series-sm2co17-smco-magnet-supplier-product/
Fig.5 Babban zafin jiki na SmCo maganadiso (T jerin) na "MagnetPower"
KAMMALAWA
1. Kamar yadda wani sosai barga rare duniya m maganadiso, SmCo za a iya amfani da a high zafin jiki (≥350 ° C) na wani gajeren lokaci. Za a iya amfani da babban zafin jiki na SmCo (T jerin) a 550 ° C ba tare da lalatawa ba.
2. Duk da haka, idan SmCo maganadiso da aka yi amfani a high zafin jiki (≥350 ° C) na dogon lokaci, da surface ne yiwuwa ga samar da lalata Layer. Yin amfani da murfin anti-oxidation na iya tabbatar da kwanciyar hankali na SmCo a babban zafin jiki.
Magana
[1] CHChen, IEEE Ma'amala akan 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)
Lokacin aikawa: Jul-08-2023
