Effect of Alloying on the Hydrogen Sorption in Ti–Zr–Mn-Based Alloys. Pt. 2: Eutectic Alloys with Laves Phase and B.C.C. Solid-Solution Structure
Year: 2024
Type: article
Abstract: Ti-Zr-Mn-BASED ALLOYS. Pt. 2: Eutectic Alloys with Laves Phase and B.C.C. Solid-Solution StructureAfter reviewing and analysing literature data, the microstructure and phase composition of the Ti 47.5 Zr 28 Mn (22.5 -х) V 2 Ni х (where х = 5.0 and 17.5 at.%) eutectic alloys in the as-cast and annealed states as well as the phase composition of the hydrogenation products of these alloys are investigated using the x-ray phase analysis and scanning electron microscopy methods.As found, nickel is distributed in the alloy between the b.c.c.solid solution and the intermetallic compound with a significantly higher content in the latter.In addition, the phase composition of the initial alloy is changed with the substitution of Mn by 5.0-17.5 at.% of Ni: the ternary NiTiZr ψ-phase, which is isostructural to the Laves phase (С14), is formed.As shown, the size of the intermetallic crystallites is a critical factor for the activation of the H absorption at room temperature and a hydrogen pressure of 0.6 MPa.At a grain surface area of 1-10 µm 2 in the initial eutectic microstructure, active interaction of the alloy with hydrogen at the first hydrogenation occurs exclusively during the heating and isobaric-isothermal exposure at 510 ± 10 °C, whereas this process starts at room temperature, when the Citation: V.A. Dekhtyarenko,
Source: Progress in Physics of Metals
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: diamond
OpenAlex ID: W4406136316