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Article Dans Une Revue Journal of Alloys and Compounds Année : 2023

Experimental determination of the H–Hf phase diagram using in situ neutron diffraction

Résumé

The Hf-H(D) system was studied using in situ neutron diffraction as a function of composition (up to 2 D/Hf) and temperature (up to 900°C). This allowed to complement the previous knowledge about this system, in particular from the points of view of the phase existence and of the phase diagram. Two major findings are: the observation of a new phase (, PtS structure type) of composition HfH similar to the monohydride found in H-Zr system, in accordance with previous first-principles calculations, and the structure determination of the ' phase (new structure type), an ordered superstructure of the  phase (CaF 2 structure type). Phase relations are established, and a new phase diagram is proposed.

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Dates et versions

hal-04246782 , version 1 (17-10-2023)

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Maxime Dottor, Jean-Claude Crivello, L. Laversenne, Jean-Marc Joubert. Experimental determination of the H–Hf phase diagram using in situ neutron diffraction. Journal of Alloys and Compounds, 2023, 937, pp.168353. ⟨10.1016/j.jallcom.2022.168353⟩. ⟨hal-04246782⟩
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