Novel Multicomponent B2-Ordered Aluminides: Compositional Design, Synthesis, Characterization, and Thermal Stability
Novel Multicomponent B2-Ordered Aluminides: Compositional Design, Synthesis, Characterization, and Thermal Stability
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DOI：
10.3390/met10111411
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发表时间：
2020-10
期刊：
影响因子：
2.9
通讯作者：
G. Muralikrishna;A. Esther;K. Guruvidyathri;P. Watermeyer;C. Liebscher;K. Kulkarni;G. Wilde;S. Divinski;B. S. Murty
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文献类型：
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作者：
G. Muralikrishna;A. Esther;K. Guruvidyathri;P. Watermeyer;C. Liebscher;K. Kulkarni;G. Wilde;S. Divinski;B. S. Murty
首次通过熔化途径设计和制造了属于 B2 有序单相的多元合金。高熵合金的设计理念被应用于设计二元B2铝化物过渡金属亚晶格。二元 AlNi 的 Ni 亚晶格中过渡金属元素的等原子取代随后产生 Al(CoNi)、Al(FeNi)、Al(CoFe)、Al(CoFeNi)、Al(CoFeMnNi) 和 Al(CoCuFeMnNi) 多元合金。使用 PHAse 图计算 (CALPHAD) 方法来预测这些合金中的相。 X 射线衍射和透射电子显微镜用于确认合金中的 B2 有序性。这些合金中 B2 相的热稳定性通过在 1373 K 和 1073 K 下长达 200 小时的长时间热处理得到证明。
For the first time, multicomponent alloys belonging to a B2-ordered single phase were designed and fabricated by melting route. The design concept of high entropy alloys is applied to engineering the transition metal sublattice of binary B2 aluminide. The equiatomic substitution of transition metal elements in the Ni sublattice of binary AlNi followed to produce Al(CoNi), Al(FeNi), Al(CoFe), Al(CoFeNi), Al(CoFeMnNi), and Al(CoCuFeMnNi) multicomponent alloys. CALculation of PHAse Diagrams (CALPHAD) approach was used to predict the phases in these alloys. X-ray diffraction and transmission electron microscopy were used to confirm the B2 ordering in the alloys. Thermal stability of the B2 phase in these alloys was demonstrated by prolonged heat treatments at 1373 K and 1073 K up to 200 h.