Investigation of glass forming ability in Ce-Al-Co (Cu) alloys

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• 作者：Chengying Tang ; Wenchao Pan ; Bingbing Zhang ; Jiang Wang ; Huaiying Zhou
• 关键词：Ce-based alloys ; Glass forming ability ; Activation energy ; X-ray diffraction ; Differential scanning calorimeter
• 刊名：Journal of Non-Crystalline Solids
• 出版年：1 January, 2014
• 年：2014
• 卷：383
• 期：Complete
• 页码：6-12
• 全文大小：2480 K

文摘

The compositional dependence of the glass forming ability (GFA) and the correlation between their GFA and the GFA-related parameters of the Ce-Al-Co(Cu) alloys were investigated. Rapidly quenched ribbons with compositions of Ce₆₅Al_xCo_{35 鈭?#xA0;x} (x = 5, 7, 10, 12, 15, 20, 25, 27), Ce₇₀Al_xCo_{30 鈭?#xA0;x} (x = 2, 5, 7, 10, 12, 15, 17) alloys, Ce₇₀Al_xCu_{30 鈭?#xA0;x} (x = 5, 7, 10, 13, 17) and Ce_{90 鈭?#xA0;x}Al₁₀Cu_x (x = 15, 20, 25, 30) alloys, were prepared by melting spinning, respectively, and their phase transformations were studied by X-ray diffraction (XRD) and differential scanning calorimeter (DSC) measurements. The experimental results indicated that the GFA of alloys Ce₆₅Al_xCo_{35 鈭?#xA0;x} (x = 5, 7, 10, 12, 15, 20, 25, 27) increased with the increasing Al content from 5 at.% to 27 at.%. The GFA of Ce₇₀Al_xCo_{30 鈭?#xA0;x} (x = 2, 5, 7, 10, 12, 15, 17) alloy ribbons decreased with the increasing Al content from 2 at.% to 17 at.%. Fully amorphous phase has been formed in all investigated Ce-Al-Cu alloys. It was found that only the parameter F₁ among the criteria (螖T_x, T_rg, 纬, 纬_m, 纬_c, 未, 尾, 尾', 尾_m, 蠒, 尉, 蠅, 蠅', 蠅₂ and F₁) for BMGs formation could reflect the GFA of the Ce-Al-Co and Ce-Al-Cu alloys. The thermal stability of the alloys with partial amorphous is higher than that of the alloys with fully amorphous in Ce-Al-Co(Cu) alloys.