Substantial enhancement of hydrogen permeability and embrittlement resistance of Nb30Ti25Hf10Co35 eutectic alloy membranes by directional solidification

• Published in: Journal of membrane science Vol. 496; pp. 165 - 173
• Main Authors: Li, Xinzhong, Liu, Dongmei, Liang, Xiao, Chen, Ruirun, Rettenmayr, Markus, Su, Yanqing, Guo, Jingjie, Fu, Hengzhi
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 15.12.2015
• Subjects: alloys; artificial membranes; diffusivity; Directional solidification; hydrogen; Hydrogen permeable membrane; Microstructure; permeability; solidification; solubility; Directional solidification; Microstructure; Hydrogen permeable membrane

As-cast Nb30Ti35−xHfxCo35 (x=0, 10, and 17.5) alloys consist of a fully lamellar eutectic structure, where the substitution of Ti by Hf induces higher hydrogen solubility and permeability, but poorer embrittlement resistance. Different as-cast alloys were found to be subject to embrittlement failure...