Abstract
Investigated was the crystal structure of the Ti-Zr, Ti-Hf, and Ti-Zr-Hf alloys prepared by the novel method of “hydride cycling” suggested by us recently. The XRD data showed formation of the ω-phase in alloys with hydrides ratios TiH2/ZrH2 (TiH2/HfH2) ≈ 2, 1, 0.44: Ti0.67Zr0.33 (Ti2Zr), Ti0.67Hf0.34 (Ti2Hf), etc. The ω-phase is unusual for binary Ti-Zr and Ti-Hf alloys at normal pressure. The SHS reaction of α- and ω-alloys with hydrogen was found to yield complex hydrogen-rich hydrides with a fcc or bct structure such as Ti0.9Zr0.1H1.9, Ti0.677Zr0.33H1.81, Ti0.5Zr0.5H1.37, and Ti0.3Zr0.7H1.96.
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