CAJ | 학술논문

采用熔体快淬及晶化退火工艺制备了含铌单相纳米晶Nd12.3Fe79.2Nb2.5B6合金,研究添加Nb对单相Nd2Fe14B纳米晶合金的磁性能、交换耦合和微观结构的影响规律.结果表明:Nb的添加提高了合金的非晶热稳定性,使得合金最佳晶化温度升高;合金晶化退火后,Nb可使晶粒尺寸分布均匀,并得到单一Nd2Fe14B相;晶粒边界比较完整,存在共格、半共格或大角度晶界,但没有观察到晶界相.上述结构可有效提高合金的磁性能,增强交换耦合作用.通过对Nd12.3Fe79.2Nb2.5B6合金磁性能分析可知:650 ℃晶化退火10 min后的合金性能最佳,交换耦合作用最强.
채용용체쾌쉬급정화퇴화공예제비료함니단상납미정Nd12.3Fe79.2Nb2.5B6합금,연구첨가Nb대단상Nd2Fe14B납미정합금적자성능、교환우합화미관결구적영향규률.결과표명:Nb적첨가제고료합금적비정열은정성,사득합금최가정화온도승고;합금정화퇴화후,Nb가사정립척촌분포균균,병득도단일Nd2Fe14B상;정립변계비교완정,존재공격、반공격혹대각도정계,단몰유관찰도정계상.상술결구가유효제고합금적자성능,증강교환우합작용.통과대Nd12.3Fe79.2Nb2.5B6합금자성능분석가지:650 ℃정화퇴화10 min후적합금성능최가,교환우합작용최강.
The effect of Nb on the magnetic properties, microstructures and exchange coupling interactions of Nd12.3Fe79.2Nb2.5B6 alloy prepared by melt-spinning and subsequent annealing were systematically studied. The results show that the addition of Nb improves the thermal stability of the as-spun amorphous ribbons, as well as improves the optimum crystallization temperature. The ribbons annealed at 650 ℃ are composed of only Nd2Fe14B phase with the grain size uniformly distributing, no intergranular phases are observed. The grain boundary can be almost perfect and coherent, semi-coherent or large angle grain boundary. Therefore, the comprehensive magnetic properties and intergranular exchange coupling interactions of the materials are strengthened. From the analysis of the magnetic properties of the alloy, it is found that, after annealed at 650 ℃ for 10 min, Nd12.3Fe79.2Nb2.5B6 alloy has the optimum magnetic properties and the strongest exchange coupling interactions.