【摘要】 根据扩散偶局部平衡原理,用电子探针微区成分分析,测定了Fe-Co-Nb三元系1173 K的等温截面相图.结果表明,Fe-Co-Nb三元扩散偶在1173 K时生成Fe₇Nb₆、Fe₂Nb和Co₇Nb₆、Co₃Nb、Co₂Nb五种中间化合物.Fe₇Nb₆与Co₇Nb₆形成连续固溶体（Fe,Co）₇Nb₆.Fe-Co-Nb三元系的1173 K等温截面由αFe+αCo+Co₃Nb,αFe+Co₃Nb+Co₂Nb,αFe+Fe₂Nb+Co₂Nb,Re₂Nb+Co₂Nb+（Fe,Co）₇Nb₆四个三相区组成,没有发现三元化合物.更多还原

【Abstract】 The isothermal section of Fe-Co-Nb ternary system at 1173 K was determined by means of the diffusion triple and electron microprobe analysis.The results indicate that there are five binary intermetallic phases of Fe₇Nb₆,Fe₂Nb,Co₇Nb₆,Co₃Nb and Co₂Nb in Fe-Co-Nb ternary system at 1173 K.Fe₇Nb₆ and Co₇Nb₆ formed into a continuous solid solution（Fe,Co）₇Nb₆.Four three-phase regions ofαFe+αCo+Co₃Nb,αFe+Co₃Nb+Co₂Nb,αFe+Fe₂Nb+Co₂Nb,Fe₂Nb+Co₂Nb+（Fe,Co）₇Nb₆ exist in the isothermal section.No ternary compound is observed.更多还原