Summary
A review is given of the application of the Gorsky effect to the study of the properties of hydrogen-metal systems. One domain of this technique is the determination of the diffusion coefficient of hydrogen and its isotopes. Measurements have been performed in a variety of metals at small as well as at large concentrations. The capability of the method is demonstrated by examples. Additionally a thermodynamic equilibrium quantity, namely the stability curve (spinodal) can be determined by Gorsky-effect measurements. As a consequence of the long-range elastic interaction between the dissolved hydrogen atoms the spinodals in hydrogen-metal systems are dependent on the sample shape. It is shown that by a proper choice of the sample geometry the incoherent and a coherent spinodal can be obtained.
Riassunto
Si fa un'analisi dell'applicazione dell'effetto Gorsky allo studio delle proprietà dei sistemi idrogeno-metallo. Un dominio di questa tecnica è la determinazione del coefficiente di diffusione dell'idrogeno e dei suoi isotopi. Sono state effettuate misure in molti metalli sia a piccole che grandi concentrazioni. Le capacità del metodo sono dimostrate da esempi. Inoltre si può determinare una quantità d'equilibrio termodinamico, cioè la curva dell'interazione elastica a lungo raggio fra gli atomi d'idrogeno dissolto, gli spinodali nei sistemi idrogeno-metallo dipendono dalla forma del campione. Si mostra che mediante un'adeguata scelta della geometria del campione si può ottenere lo spinodale incoerente ed uno coerente.
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Völkl, J., Alefeld, G. The Gorsky effect: Recent results. Nuov Cim B 33, 190–204 (1976). https://doi.org/10.1007/BF02722487
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DOI: https://doi.org/10.1007/BF02722487