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Nuclear magnetic resonance amorphous alloys

Solid-state nuclear magnetic resonance (NMR) has been extensively used to assess structural properties, electronic parameters and diffusion behavior of the hydride phases of numerous metals and alloys using mostly transient NMR techniques or low-resolution spectroscopy [3]. The NMR relaxation times are extremely useful to assess various diffusion processes over very wide ranges of hydrogen mobility in crystalline and amorphous phases [3]. In addition, several borohydrides [4-6] and alanates [7-11] have also been characterized by these conventional solid-state NMR methods over the years where most attention was on rotation dynamics of the BHT, A1H4, and AlHe anions detection of order-disorder phase transitions or thermal decomposition. There has been little indication of fast long-range diffusion behavior in any complex hydride studied by NMR to date [4-11]. [Pg.193]

By studying the Mossbauer spectra and the nuclear magnetic resonance of a series of amorphous alloys, it was established [6.44] that their LO differs slightly from that in crystals. [Pg.228]

Nuclear magnetic resonance (NMR) experiments are a useful tool for obtaining information about the electronic properties of amorphous alloys. It is not a general method. Its applicability is restricted to alloys composed of elements having a nucleus with nuclear parameters that allow for an NMR signal in the currently available frequency range of modern NMR equipments. [Pg.386]

The study of amorphous metal-hydrogen systems has started quite recently in contrast to the vast amount of work on the properties of crystalline metal-hydrogen systems that dates back over several decades and makes use of a great number of different techniques. The amorphous system a - Tij CuyHx has been studied by Inelastic Neutron Scattering (INS)" and Nuclear Magnetic Resonance (NMR) Very recently an extensive study of the structure of CuTi amorphous alloys and hydrides has been made by neutron diffraction and computer simulation (ref, 4 and references therein). [Pg.315]


See other pages where Nuclear magnetic resonance amorphous alloys is mentioned: [Pg.99]    [Pg.307]   


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