【摘 要】
：
Phase equilibria of Zr-Nb-Fe system at 700 ℃ were determined by using X-ray diffraction (XRD) and Scan Electron Microscope.Previous reported ternary compounds,cubic-Ti2Ni type (Zr, Nb)2Fe and hexagona
【机 构】
：
College of Science, Guangxi University for Nationalities, Nanning China, 530006
【出 处】
：
第十七届全国相图学术会议暨相图与材料设计国际研讨会
论文部分内容阅读
Phase equilibria of Zr-Nb-Fe system at 700 ℃ were determined by using X-ray diffraction (XRD) and Scan Electron Microscope.Previous reported ternary compounds,cubic-Ti2Ni type (Zr, Nb)2Fe and hexagonal MgZn2 type Zr(Nb,Fe)2, were confirmed.Zr(Nb,Fe)2 was proved to be an independent ternary compound with large homogeneity domain with Zr at constant composition of 34 at.% and Nb varied from 5 to 58 at.%.In the zirconium rich comer, equilibria of α-Zr with βZr and (Zr,Nb)2Fe, β-Zr with (Zr, Nb)2Fe and Zr(Nb,Fe)2, and β-Zr with Zr(Nb,Fe)2 and βNb, were determined.A partial reaction scheme was proposed for the zirconium rich alloys.By aim of reaction scheme, second phase particles βNb and Zr(Nb,Fe)2 in industrial Zr alloys were determined to be stable below ~580-620 ℃ and ~650-680 ℃.
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