CAJ | 학술논문

采用差热分析(DTA)和 X 射线衍射分析(XRD)相结合的方法对纳米复合永磁合金 Nd9 Fe85－x Ti4C2Bx(x＝10~15)铸锭进行研究,确定了合金的液相线温度、固相线温度以及其它相变的温度区间,推断了合金凝固过程中发生的相变.结果表明,随着合金铸锭中B含量从10％(原子分数)增加至15％(原子分数),合金的液相线温度从1498．5 K 逐步降低至1472．5 K,而固相线温度从1353．5 K 逐步升高至1358．3 K.可以推断合金铸锭的凝固相变如下：在它们的液相线下的第一个相变温度区间,L→γ-Fe,L＋γ-Fe→Nd2 Fe14 B；在第二个相变温度区间,L→γ-Fe,L→Nd2 Fe14 B＋Fe3 B；在第三个相变温度区间,L→Nd2-Fe14 B,L→Nd2 Fe14 B＋Fe3 B ＋ Nd1．1 Fe4 B4.
채용차열분석(DTA)화 X 사선연사분석(XRD)상결합적방법대납미복합영자합금 Nd9 Fe85－x Ti4C2Bx(x＝10~15)주정진행연구,학정료합금적액상선온도、고상선온도이급기타상변적온도구간,추단료합금응고과정중발생적상변.결과표명,수착합금주정중B함량종10％(원자분수)증가지15％(원자분수),합금적액상선온도종1498．5 K 축보강저지1472．5 K,이고상선온도종1353．5 K 축보승고지1358．3 K.가이추단합금주정적응고상변여하：재타문적액상선하적제일개상변온도구간,L→γ-Fe,L＋γ-Fe→Nd2 Fe14 B；재제이개상변온도구간,L→γ-Fe,L→Nd2 Fe14 B＋Fe3 B；재제삼개상변온도구간,L→Nd2-Fe14 B,L→Nd2 Fe14 B＋Fe3 B ＋ Nd1．1 Fe4 B4.
The ingots of Nanocomposite permanent magnetic alloys Nd9Fe85-xTi4C2Bx(x=10-15)are investiga-ted by differential thermal analysis (DTA)and X-ray diffraction (XRD)methods.On the basis of thermal anal-ysis and phase component analysis,the liquidus temperatures,solidus temperatures and temperature intervals of other transformations of the alloys were determined,and the phase transformation approaches of the alloys were deduced.The results show that with the increasing of the B content of the alloys,their liquidus tempera-tures decrease gradually from 1 498.5 K to 1 472.5 K,and their solidus temperatures increase gradually from 1 353.5 to 1 358.3 K.The solidification processes of the alloy ingots are probably as follows:in the first phase transformation temperature interval below their liquidus temperature,L→γ-Fe,L+γ-Fe→Nd2 Fe14 B;in the second phase transformation temperature interval,L→γ-Fe,L→Nd2 Fe14 B+Fe3 B;in the third phase transfor-mation temperature interval,L→Nd2 Fe14 B,L→Nd2 Fe14 B+Fe3 B + Nd1.1 Fe4 B4 .