Microstructures and defect structures in ZrCr2 Laves phase based intermetallic compounds

Kanazawa, Shogo; Kaneno, Yasuyuki; Inoue, Hirofumi; Kim, W.-Y.; Takasugi, Takayuki

doi:10.1016/s0966-9795(02)00057-2

Cited by 56 publications

(16 citation statements)

References 11 publications

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“…The different energy levels of anti-site and vacancy defects in a specific IMC may change its stoichiometry range [251][252][253]. If the energy for such defects is relatively low, a wide range of compositions (off-stoichiometry) are expected, among which AB 2 Laves phase alloys make up the largest portion in IMC [21].…”

Section: Stoichiometrymentioning

confidence: 99%

C14 Laves Phase Metal Hydride Alloys for Ni/MH Batteries Applications

2017

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C14 Laves phase alloys play a significant role in improving the performance of nickel/metal hydride batteries, which currently dominate the 1.2 V consumer-type rechargeable battery market and those for hybrid electric vehicles. In the current study, the properties of C14 Laves phase based metal hydride alloys are reviewed in relation to their electrochemical applications. Various preparation methods and failure mechanisms of the C14 Laves phase based metal hydride alloys, and the influence of all elements on the electrochemical performance, are discussed. The contributions of some commonly used constituting elements are compared to performance requirements. The importance of stoichiometry and its impact on electrochemical properties is also included. At the end, a discussion section addresses historical hurdles, previous trials, and future directions for implementing C14 Laves phase based metal hydride alloys in commercial nickel/metal hydride batteries.

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Section: Stoichiometrymentioning

confidence: 99%

C14 Laves Phase Metal Hydride Alloys for Ni/MH Batteries Applications

2017

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“…Other examples for such phase diagrams with a temperature-dependent structure change can be found in the literature for systems such as Cr-Ti [83][84][85][86][87], Cr-Nb [88][89][90][91][92][93][94][95], Cr-Hf [96][97][98][99][100][101], Cr-Zr [76,[102][103][104], Hf-Mo [77,[105][106][107][108][109], and Ta-V [110,111]. As will be discussed below in Section 3.5, the C36 Laves phase polytype was observed as an intermediate phase in several of the abovementioned systems.…”

Section: Temperature-dependent Transformations In Systems With Two Lamentioning

confidence: 99%

Structure and stability of Laves phases part II—structure type variations in binary and ternary systems

2005

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“…From comparisons of measured and calculated densities in a number of different binary systems, extensions of the homogeneity ranges to the B-rich side have been explained by a simple substitution of the larger B atoms by the smaller A atoms [63,65,66,68,69], whereas on the A-rich side the occurrence of vacancies in the B sublattice seems to be a more likely explanation [2,40,67]. Exceptions to this behaviour were reported for the Laves phases NbCr 2 , NbCo 2 [51,70], NbFe 2 [51,70,71], and ZrCr 2 [72,73] where anti-site defects were found to form on both sides of the stoichiometric composition. According to a model of Modder and Bakker [74], defects in C15 Laves phases consist of three vacancies on the B sublattice combined with one anti-structure B atom.…”

Section: Introductionmentioning

confidence: 99%