【摘要】 运用平衡合金法设计17个关键合金,并结合金相显微镜（OM）、X射线衍射（XRD）和电子探针显微分析（EPMA）测定Al-Ce-Ge三元系在500℃时的相平衡信息。结果表明:在500℃时,该三元系稳定存在α(CeAl_1.62-Ge_0.38),β（CeAl₂Ge₂）,γ（CeAlGe）,δ（CeAlGe₂）和ε（Ce₂AlGe₆）五个三元化合物及液相,测定δ相成分范围为Ce_24.7²4.8Al_33³3.9Ge_41.3⁴2.3;实验发现η(Ce_61.3Al_21.9Ge_16.8)和μ(Ce_55.9Al_11.1Ge₃₃)两个新的三元化合物;并发现α+CeAl₃+γ,Ce₃Al₁₁+CeAl₃+γ,αCeGe_2-x+CeGe+γ,CeAl+CeAl₂+Ce₅Ge₃,Ce₃Ge+Ce₅Ge₃+Ce₃Al,CeAl+Ce₃Al+η和CeAl₂+Ce₅Ge₃+μ七个新的三相区。更多还原

【Abstract】 Combined with optical microscope（OM）, X-ray diffraction（XRD） and electron probe microanalysis（EPMA）, phase equilibria of the Al-Ce-Ge system at 500 ℃ was investigated by equilibrated alloys method. The results show that, five ternary compounds, i.e. α(CeAl_1.62Ge_0.38), β（CeAl₂Ge₂）, γ（CeAlGe）, δ（CeAlGe₂） and ε（Ce₂AlGe₆） as well as the liquid phase are verified at 500 ℃ and the homogeneity range of the δ phase is Ce_24.7²4.8Al_33³3.9Ge_41.3⁴2.3. Two new ternary compounds, i.e. η(Ce_61.3Al_21.9Ge_16.8) and μ(Ce_55.9Al_11.1Ge₃₃), are observed. In addition, seven three-phase regions α+CeAl₃+γ, Ce₃Al₁₁+CeAl₃+γ, αCeGe_2-x+CeGe+γ, CeAl+CeAl₂+Ce₅Ge₃, Ce₃Ge+Ce₅Ge₃+Ce₃Al, CeAl+Ce₃Al+η and CeAl₂+Ce₅Ge₃+μ are observed.更多还原