Laves phase alloys

XAS studies have also been carried out on C14 Laves phase alloys Ti05Zr05M2 and Ti075Zr025M2 (M= V05Ni, Feo2... 

Zr-based AB2 Laves phase alloys consist of cast polycrystalline and nanocrystalline structures. The nanocrystalline microstructure could be obtained for quenching the melt-spun alloys after annealing151. Figure 1 shows SEM Micrographs of the cast Polycrystalline ABi Alloys. Microstructures of AB2-1 alloys consist of cubic C15 Laves phase, hexagonal C14 Laves phase and of AB2-4 is only Cl5. The white one of non Laves in AB2-I and AB2-4 is the phase Zr9Nil 1 and Zr7NilO respectively. 

Luo, W., Clewley, J.D., Flanagan, T.B. and Oates, W.A. (1992) Thermodynamic Characterization of the Zr-Mn-H System Part 1. Reaction of H2 with Single-Phase ZrMn2+x C14 Laves Phase Alloys. J. Alloys. Compounds... 

Zhu] Zhu, J.H., Liaw, P.K., Liu, C.T., Effect of Electron Concentration on the Phase Stability of NbCr2-based Laves Phase Alloys , Mater. Sci. Eng. A, 239-240, 260-264 (1997) (Phase Relations, Review, Electronic Structure, 30)... 

Kur] Kuranaka, S., Gamo, T., Morita, Y, Powder X-ray Diffraction under a High Pressure Hydrogen Atmosphere for Zr-Cr Based Laves Phase Alloys , J. Alloys Compd., 253—254, 268-271, (1997) (Crys. Stracture, Experimental, 13)... 

Figure 6-40. SEM (back-scatter-mode) cross-section micrographs showing similar behavior for NbAl, + Laves phase and TiAl + Laves phase alloys, (a) Nb-67.5Al-7Cr-0.5Y-0.25W at.% 500 1-h cycles at 1200°C in air (Doychak etal., 1993) (b) Ti-50Al-15Cr at.% aftera 100 h isothermal exposure at 1000 C in air (Brady et at, 1997b).

In both the y+ Laves phase and NbAl3 -1-Laves phase alloys, the y or NbAl3 phases act as an Al reservoir for the Laves phase which contributes to the capacity of the... 

Laves phase) alloys. Several battery alloy compositions are listed in table 2. Battery performance depends on the alloys, electrode preparation methods, and battery assembly. The performances of alloys are changed by various factors such as alloy composition, casting conditions, grain boundary phases, surface modification, etc. The important point is that the Ni-MH battery does not have a fixed performance, opening the possibility for remarkable progress in the future. 

Young, K., Fetcenko, M.A., Ouchi, T., Li, F., Koch, J. (2008). Structural, Thermodynamic, and electrochemical Properties of TixZri-x(VNiCrMnCoAl)2 C14 Laves Phase Alloys. Journal of Alloys and Compounds, Vol.464, pp.238-247, ISSN 0925-8388... 

Mac] Machon, L., Sauthoff, G., Deformation Behaviour of Al-Containing C14 Laves Phases Alloys , IntermetalUcs, 4, 469-481 (1996) (Experimental, Phase Relations, 41)... 

---