Nanocrystalline alloy

The progress of hydrogen storage and its container materials were reviewed. AB2 nanocrystalline alloy, Ti-NaAlH4 complex hydride and Mg/MWNTs composite are promising hydrogen storage materials. 

SELECTED ISSUES IN QUANTITATIVE STRUCTURE ANALYSIS OF NANOCRYSTALLINE ALLOYS... 

The fitted parameters (see text) of the saturation magnetostriction for several nanocrystalline alloys and... 

Fig. 69. Saturation magnetostriction, Ag, versus crystalline fraction, p, in (a) Fe89Zr7B4 and (b) FegjZr7B6Cu2 nanocrystalline alloys. After Slawska-Waniewska et al. (1996).

The existence of the surface contribution to the effective magnetostriction of nanocrystalline alloys has been confirmed theoretically in terms of the dipolar model (Szumiata et al. 1999). These authors showed that, due to the limited radius of the nanoparticles, additional magnetostrictive stresses are localised at the interfaces. The evaluation of the influence of the dipolar interaction on the magnetostriction in crystalline grains of perfect spherical shape surrounded by a magnetic environment of about 0.S nm with either crystalline or amorphous structure has been calculated. A similar method was previously used to obtain the surface and volume anisotropy (Draaisma and de Jonge 1988) and to... 

A. Inoue, Amorphous, quasicrystalline and nanocrystalline alloys in Al- and Mg-based systems 83... 

Nanocrystalline alloys Rapid solidification (amorphization) and crystallization Exchange interaction Composition and proportion of phases... 

The discussion so far assumed that the superimposed uniaxial anisotropy is perfectly uniform. This is rather the exception than the rule in reality, mostly due to internal stresses and/or surface defects. The typical fluctuation wavelengths are much larger than Zex and range from a few to about 100 pm. Such Ku fluctuations ultimately provide the limiting factor for the soft magnetic properties in amorphous and optimized crystalline (conventional or nanocrystalline) alloys. 

K. Suzuki, in Properties and Applications of Nanocrystalline Alloys from Amorphous Precursors, NATO Science Series II Mathematics, Physics and Chemistry, Vol. 184 , Eds. B. Idzikowski, P. Svec, M. Miglierini, Kluwer Academic, Dordrecht 2005, p. 1. 

Early work on ball-milled TiFe has shown that nanocrystalline alloys are easier to activate than conventional alloys [159,160]. The final state after ball milling depends on the oxygen content. High O2 content (>2.9atom%) leads to formation of an amorphous TiFe phase [159]. Ifthe oxygen content is larger than 5 atom%, a Ti-rich... 

A.S. Argon and S. Veprek, in Proc. 22nd Riso Intern. Symp. on Materials Science, Science of Metastable and Nanocrystalline Alloys - Structure, Properties and Modeling (Eds. A. R. Dinesen et al.), Riso National Laboratory, Roskilde, Denmark, 2001, p. 183. 

Inoue, Amorphous, nanoquasicrystalline and nanocrystalline alloys in Al-based systems // Progress in Mater. Science 43 (1998), P. 365-520. 

Mon] XRD, DSC, magnetization Nanocrystalline alloys prepared by mechanical alloying... 

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