Observations on the microstructure and orientation relations in the vanadium-hydrogen system

Abstract

Observations on the microstructure and orientation relations in the V-H system were made using optical, X-ray, and electron microscopy techniques. In the two phase α+ β region the axes of the β (bct) vanadium hydride were shown to be slightly tilted away from the cube axes of the α (bcc) vanadium. Metallographie observations of a polished (100) crystal showed two different surface features associated with the formation of the β hydride depending on the concentration. In the two phaseβ + γ region the orientation relation between the β(bct) phase and the γ (fcc) phase is such that the (100)γ || (110)r and [001]γ || [001]γ.