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Liquidus projection of the Al–Nb–V system
Calphad ( IF 1.9 ) Pub Date : 2020-09-26 , DOI: 10.1016/j.calphad.2020.102196
J.C.P. Santos , N. Chaia , K.E. Borowski , A.A.A.P. da Silva , D.F. Barros , D.A. Abreu , C.A. Nunes , G.C. Coelho

In the present work, the liquidus projection of the Al–Nb–V system is proposed for the first time. It corresponds to important data for the design of innovative low-density Al-containing refractory high-entropy alloys. Experimental investigation was carried out via microstructural characterization of fifty-six alloys in as-cast state using scanning electron microscopy (SEM), electron dispersive X-ray spectroscopy (EDS) and X-ray diffractometry (XRD). Results showed no signs of ternary phases and only primary precipitation fields from binary phases were observed. The BCC primary precipitation field is dominant, while V5Al8 primary precipitation field is restricted to a small region close to Al–V binary. Three class II (UI, UII and UIII) ternary invariant reactions were proposed.



中文翻译:

Al–Nb–V系统的液相线投影

在目前的工作中,首次提出了Al–Nb–V系统的液相线预测。它对应于设计创新的低密度含铝耐火高熵合金的重要数据。使用扫描电子显微镜(SEM),电子色散X射线能谱(EDS)和X射线衍射仪(XRD)通过对56种处于铸态的合金的微观结构表征进行了实验研究。结果显示没有三元相的迹象,仅观察到来自二元相的初级降水场。BCC初级降水场占主导地位,而V 5 Al 8初级降水场被限制在一个接近Al–V二元的小区域。三类II(U I,U II和UIII)提出了三元不变反应。

更新日期:2020-09-26
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