Grain-boundary energies in gold-copper alloys

✍ Scribed by J.E Milliard; M Cohen; B.L Averbach

• Publisher: Elsevier Science
• Year: 1960
• Weight: 1004 KB
• Volume: 8
• Category: Article
• ISSN: 0001-6160
• DOI: 10.1016/0001-6160(60)90136-x

✦ Synopsis

The ratio of grain-boundary to surface energy has been determined as a function of composition in the gold-copper system. From interferometric measurements of the boundary groove angles in specimens thermally etched at 85O"C, the following average grain-boundary to surface-energy ratios were obtained: 0.25, 0.28, 0.34, 0.42, 0.37, and 0.36 at 0, 20, 40, 60, 80, and 100 at. y0 copper, respectively. Existing data for the surface energies yield 370,320,310,390,430 and 590 erg cm+, respectively, for the absolute grain-boundary energies. A calculation is included of t,he boundary adsorption corresponding to this energy variation, and an estimate is made of the minimum number of atoms required at the grain boundary to accommodate the calculated absorption.

ENERGIES DES JOINTS DE GRSINS DANS LES ALLIAGES OR-CUIVRE

Les auteurs ont determine le rapport entre I'energie de joint de grains et Gnergie de surface dans le systeme or-cuivre en fonction de la composition des alliages.

Par des mesures interferometriques des angles de frontiere d'echantillon attaques thermiquement a 850X', les rapports suivants ont Bte obtenus: 0,