Formation of Au‐Ge metastable phases by ion mixing
1982
Amorphous and metastable crystalline phases in the Au-Ge system are formed by ion mixing of multilayered samples. Amorphous alloys are obtained for Ge composition ≧ 60 at%. They transform at room temperature into metastable crystalline phases within 2 to 3 days and eventually decompose into equilibrium Au and Ge within a week. Three metastable crystalline phases are observed. The hexagonal one appears to be a Hume-Rothery compound. An analogous phase exists also for Au-Si.
Des phases amorphes et metastables ont ete produites dans le systeme Au-Ge par melange ionique d'echantillons a couches multiples. Des alliages amorphes ont ete obtenus pour des compositions de Ge ≧ 60% at. IIs se transforment a temperature ambiante apre 2 a 3 jours en phases cristallines metastables et se decomposent finalement apres une semaine en Au et Ge a l'etat d'equilibre. Trois phases cristallines metastables ont ete observees. La phase hexagonale semble correspondre a un compose du type Hume-Rothery. Une phase analogue existe aussi pour Au-Si.
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