Phase Relations in the Beryllium-rich Section of the System Beryllium-Copper-Iron

Jönsson, Sigurd; Kaltenbach, Kurt; Petzow, G.

doi:10.1515/ijmr-1982-730812

Cited by 2 publications

(2 citation statements)

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“…% Fe. Later, Jönsson et al [13] were able to index the same X-ray peaks to another hexagonal structure, with c/a ratio 1.50, rather then the previously reported value of 2.59.…”

Section: Introductionmentioning

confidence: 90%

“…Interestingly, the phase described by Johnson et al [11] shares similarities with that reported by Teitel and Cohen [8] for FeBe 11 ; this would explain the presence of ∼18 atoms per unit cell of FeBe 11 . Aldinger [12] and Jönsson et al [13] report structures with a larger lattice constant but do not give information regarding the crystal basis.…”

Section: Crystallography Of Fe-al-be Intermetallicsmentioning

confidence: 99%

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Crystal structure, thermodynamics, magnetics and disorder properties of Be–Fe–Al intermetallics

Burr

Middleburgh

Grimes

2015

Journal of Alloys and Compounds

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The elastic and magnetic properties, thermodynamical stability, deviation from stoichiometry and order/disorder transformations of phases that are relevant to Be alloys were investigated using density functional theory simulations coupled with phonon density of states calculations to capture temperature effects. A novel structure and composition were identified for the Be-Fe binary ε phase. In absence of Al, FeBe 5 is predicted to form at equilibrium above ∼1100 K, while the ε phase is stable only below ∼1500 K, and FeBe 2 is stable at all temperatures below melting. Small additions of Al are found to stabilise FeBe 5 over FeBe 2 and ε, while at high Al content, AlFeBe 4 is predicted to form. Deviations from stoichiometric compositions are also considered and found to be important in the case of FeBe 5 and ε. The propensity for disordered vs ordered structures is also important for AlFeBe 4 (which exhibits complete Al-Fe disordered at all temperatures) and FeBe 5 (which exhibits an order-disorder transition at ∼950 K).

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“…% Fe. Later, Jönsson et al [13] were able to index the same X-ray peaks to another hexagonal structure, with c/a ratio 1.50, rather then the previously reported value of 2.59.…”

Section: Introductionmentioning

confidence: 90%