CAJ | 학술논문

采用金相显微镜、X射线衍射、电子探针和差热分析等技术确定了Sm?Nd?Fe三元系相图，包含Sm?Nd?Fe三元系500°C等温截面、SmFe2?NdFe2变温截面和(Sm0.88Nd0.12)Fex(1.6≤x≤2.4)变温截面。Sm?Nd?Fe三元系含有4种金属间化合物：(Sm,Nd)Fe2，(Sm,Nd)Fe3，(Sm,Nd)5Fe17，(Sm,Nd)2Fe17，不含(Sm,Nd)6Fe23相。500°C等温截面含有7个单相区，8个两相区，4个三相区。SmFe2?NdFe2变温截面含有2个单相区，4个两相区，7个三相区。(Sm0.88Nd0.12)Fe1.6?(Sm0.88Nd0.12)Fe2.4含有2个单相区，5个两相区，2个三相区。当x≤0.5时，(Sm1?xNdx)Fe2合金的包晶转变温度随着Nd含量的增加而降低，表明以Nd代替Sm从而使(Sm,Nd)Fe2相的稳定性降低。
채용금상현미경、X사선연사、전자탐침화차열분석등기술학정료Sm?Nd?Fe삼원계상도，포함Sm?Nd?Fe삼원계500°C등온절면、SmFe2?NdFe2변온절면화(Sm0.88Nd0.12)Fex(1.6≤x≤2.4)변온절면。Sm?Nd?Fe삼원계함유4충금속간화합물：(Sm,Nd)Fe2，(Sm,Nd)Fe3，(Sm,Nd)5Fe17，(Sm,Nd)2Fe17，불함(Sm,Nd)6Fe23상。500°C등온절면함유7개단상구，8개량상구，4개삼상구。SmFe2?NdFe2변온절면함유2개단상구，4개량상구，7개삼상구。(Sm0.88Nd0.12)Fe1.6?(Sm0.88Nd0.12)Fe2.4함유2개단상구，5개량상구，2개삼상구。당x≤0.5시，(Sm1?xNdx)Fe2합금적포정전변온도수착Nd함량적증가이강저，표명이Nd대체Sm종이사(Sm,Nd)Fe2상적은정성강저。
Phase equilibria of the Sm?Nd?Fe ternary system were determined in an isothermal section of 500 °C and vertical sections of SmFe2–NdFe2 and (Sm0.86Nd0.12)Fex (1.6≤x≤2.4) by optical microscopy, X-ray diffraction analysis, electron probe microanalysis (EPMA), and differential thermal analysis (DTA) techniques. There are four intermetallic phases: (Sm,Nd)Fe2, (Sm,Nd)Fe3, (Sm,Nd)5Fe17 and (Sm,Nd)2Fe17 in the Sm?Nd?Fe ternary system, and no (Sm,Nd)6Fe23 phase exists in this system. The isothermal section of 500 °C possesses 7 single-phase regions, 8 two-phase regions, and 4 three-phase regions. The vertical section of SmFe2?NdFe2 contains 2 single-phase regions, 4 two-phase regions, and 7 three-phase regions, and that of (Sm0.88Nd0.12)Fex consists of 2 single-phase regions, 5 two-phase regions, and 2 three-phase regions. The peritectic temperatures for (Sm1?xNdx)Fe2 alloys decrease with increasing the Nd content when x≤0.5, and the substitution of Nd for Sm makes the stability of (Sm,Nd)Fe2 phase decrease.