A geometric analysis of solubility ranges in Laves phases

Thoma, Dan J.; Perepezko, J. H.

doi:10.1016/0925-8388(95)01557-4

Cited by 136 publications

(57 citation statements)

References 18 publications

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“…2) exist at ranges of composition. The line width (also called solubility for a particular IMC) can be traced to the formation of defects and lattice-adjusted contraction (Thoma & Perepezko, 1995). When there are more A atoms present in the IMC, part of the excessive A atoms either move to B-site (anti-site defect) or create vacancy in B-site (vacancy defect) while still maintaining the same crystal structure.…”

Section: Introductionmentioning

confidence: 99%

Stoichiometry in Inter-Metallic Compounds for Hydrogen Storage Applications

Young¹

2012

Stoichiometry and Materials Science - When Numbers Matter

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Section: Introductionmentioning

confidence: 99%

Stoichiometry in Inter-Metallic Compounds for Hydrogen Storage Applications

Young¹

2012

Stoichiometry and Materials Science - When Numbers Matter

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“…Most Laves phases form congruently or via eutectic or peritectic reactions, but TiCr 2 precipitates from a bcc solid solution. In addi tion, over 75% of the binary Laves phases are reported to be line compounds [25], yet a solubility range exists for TiCr 2 . Thus, through appropriate annealing treat ments, chemically-homogeneous, single-phase TiCr 2 can be formed over a range of compositions near stoi chiometry.…”

Section: Introductionmentioning

confidence: 99%

Factors affecting the room-temperature mechanical properties of TiCr2-base Laves phase alloys

Chen

Allen

Livingston

1998

Materials Science and Engineering: A

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Various effects on the room-temperature mechanical properties of TiCr 2 -base alloys have been assessed in efforts to improve the toughness of Laves phase intermetallics (AB 2 ). Systematic studies were performed on: (i) single-phase stoichiometric and nonstoichiometric TiCr 2 , (ii) TiCr 2 -base ternary Laves phases, and (iii) two-phase binary alloys containing TiCr 2 . In order to make quantitative comparisons among the different alloys, Vickers indentation was used to obtain hardness and fracture toughness values. Within the single-phase field, constitutional defects accounted for the compositional dependencies of properties, and may aid the synchroshear deformation process. Ternary Laves phases comprised of Fe, Nb, V or Mo additions to TiCr 2 indicated that alloying elements which partition to both A and B sublattices can improve the toughness. Stabilization of the cubic C15 crystal structure also resulted in higher toughness values. Small amounts of the bcc �-phase effectively reduced crack lengths in the Laves phase, and two-phase alloys of (Ti,Cr) + TiCr 2 exhibited significant improvements in toughness.

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“…Moreover, the main matrix with a B/A ratio between 2.1 and 2.3 and a relatively low e/a value (6.7 to 6.9) was assigned to a slightly hyper-stochiometric C14 phase with Pd residing in the A-site. Pd resides in the A-site for the C14 phase, or the B/A ratio would be even higher and beyond the practical range [126]. The dilemma of site selection for Pd is the same as for the case of V, which resides in the A-and B-sites in AB and AB 2 phases, respectively [127,128].…”

Section: Sem/eds Analysismentioning

confidence: 99%

Increase in the Surface Catalytic Ability by Addition of Palladium in C14 Metal Hydride Alloy

Kim

Ouchi²,

Nei³

et al. 2017

Batteries

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A combination of analytic tools and electrochemical testing was employed to study the contributions of Palladium (Pd) in a Zr-based AB 2 metal hydride alloy (Ti 12 Zr 22.8 V 10 Cr 7.5 Mn 8.1 Co 7 Ni 32.2 Al 0.4 ). Pd enters the A-site of both the C14 and C15 Laves phases and shrinks the unit cell volumes, which results in a decrease of both gaseous phase and electrochemical hydrogen storage capacities. On the other hand, the addition of Pd benefits both the bulk transport of hydrogen and the surface electrochemical reaction. Improvements in high-rate dischargeability and low-temperature performances are solely due to an increase in surface catalytic ability. Addition of Pd also decreases the surface reactive area, but such properties can be mediated through incorporation of additional modifications with rare earth elements. A review of Pd-addition to other hydrogen storage materials is also included.

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A geometric analysis of solubility ranges in Laves phases

Cited by 136 publications

References 18 publications

Stoichiometry in Inter-Metallic Compounds for Hydrogen Storage Applications

Stoichiometry in Inter-Metallic Compounds for Hydrogen Storage Applications

Factors affecting the room-temperature mechanical properties of TiCr2-base Laves phase alloys

Increase in the Surface Catalytic Ability by Addition of Palladium in C14 Metal Hydride Alloy

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