摘要
采用X射线衍射仪、差热扫描量热仪、电子探针显微分析仪等实验设备对电弧熔炼制备的Pr-Fe-B合金的相组成、相转变及微观组织进行了测试表征。结果表明,Pr5Fe75B20合金铸态组织中主要物相为Pr2Fe14B、Pr1.1Fe4B4、Fe2B、fcc-Fe;而Pr18Fe75B7主要物相则为Pr2Fe14B、Pr1.1Fe4B4、α-Fe、dhcp-Pr以及Pr2Fe17,并且随着Pr-Fe-B合金中硼含量的提高,dhcp-Pr相的含量明显减少。采用相图计算技术,利用Thermo-Calc软件中的Scheil模块计算模拟了Pr-Fe-B合金的非平衡凝固过程。计算结果与分析检测结果相一致,为Nd-Pr-Fe-B永磁合金成分及组织设计提供了基础数据。
The phase composition,phase transformation and microstructure of Pr-Fe-B alloy prepared by arc melting were characterized by X-ray diffractometer,differential scanning calorimeter and electron probe microanalyzer.The results show that the main phases in the as-cast microstructure of Pr5Fe75B20 alloy are Pr2Fe14B,Pr1.1Fe4B4,Fe2B and fcc-Fe,while those of Pr18Fe75B7 alloy are Pr2Fe14B,Pr1.1Fe4B4,α-Fe,dhcp-Pr and Pr2Fe17.With the increase of boron content in the alloy,the content of dhcp-Pr phase significantly decreases.The non-equilibrium solidification of Pr-Fe-B ternary alloy was simulated using calculation of phase diagram with Scheil module of Thermo-Calc software.The calculated results are in good agreement with the experimental results,which provides basic data for the composition and microstructure design of Nd-Pr-Fe-B permanent magnetic alloy.
作者
张佳彬
李莎
程祥
戎茂华
王江
ZHANG Jia-bin;LI Sha;CHENG Xiang;RONG Mao-hua;WANG Jiang(School of Material Science and Engineering,Guilin University of Electronic Technology,Guilin 541004,China)
出处
《稀有金属与硬质合金》
CAS
CSCD
北大核心
2020年第4期37-41,共5页
Rare Metals and Cemented Carbides
基金
国家自然科学基金(51761008,51461013)
广西自然科学基金(2016GXNSFDA380015,2016GXNSFGA380001)
广西科技计划项目(2017AD23031)。
关键词
Pr-Fe-B合金
相组成
相转变
微观组织
热力学计算
Pr-Fe-B alloy
phase composition
phase transformation
microstructure
thermodynamic calculation
