快速凝固(Sm_(1-x)B_x)Fe_2合金的结构和磁性

Structure and Magnetic Properties of Rapidly Solidified (Sm 1-x B x))Fe 2 Alloys

采用真空单辊快淬法（铜辊，线速度达２０～２３ｍ／ｓ）将成分为（Ｓｍ１－ｘＢｘ）Ｆｅ２（ｘ＝０，０．０１５，０．０３，０．０４５，０．０６）合金锭，制成快速凝固的鳞片状合金，再经粉碎在３０ＭＰａ压力下，模压成φ１０ｍｍ圆片，然后进行ＸＲＤ分析，比磁化强度和磁致伸缩（λ″－λ┴）的测量。实验结果表明各样品只有少量非晶相，主要是ＳｍＦｅ２及少量的ＳｍＦｅ５和ＳｍＦｅ７化合物。样品（Ｓｍ０．９８５Ｂ０．０１５）Ｆｅ２和（Ｓｍ０．９４Ｂ０．０６）Ｆｅ２，在７２０ｋＡ／ｍ磁场下，比磁化强度分别为：５９．５，５２．３Ａｍ２ｋｇ－１，在８８５ｋＡ／ｍ磁场下（λ″－λ┴）分别为：－５１０×１０－６和－３１０×１０－６。

The flake samples of rapidly solidified (Sm 1-x B x)Fe 2(x=0,0.015,0.03,0.045,0.06) alloys were prepared by the single roll quenching. By using the X-ray diffraction,specific magnetization and magnetosfriction measurements, it was revealed that the structure of the as quenched samples in this experimental condition consists mainly of the compound SmFe 2 and a small amount of amorphous phase, SmFe 5 and SmFe 7; with the increase of boron contents, the specific magnetizations (σ) of these samples change only slightly,while magnetostrictions, ㄧλ ″-λ ┴ㄧ,decrease, except (Sm 0.985 B 0.015 )Fe 2 sample. 〖WTHZ]