𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Effect of palladium on sulfide tarnishing of noble metal alloys

✍ Scribed by Suoninen, E. ;Herø, H. ;Minni, E.

Publisher
John Wiley and Sons
Year
1985
Tongue
English
Weight
885 KB
Volume
19
Category
Article
ISSN
0021-9304

No coin nor oath required. For personal study only.

✦ Synopsis

Electron spectroscopic studies of Au-Ag-Cu alloys of the type used for dental castings show that small additions ( s 3 wt%) of palladium reduce essentially the thickness of the sulfide layer formed on surfaces of samples treated in aqueous Na2S solutions. Relative to silver, palladium does not enrich in the sulfide, but statistically significant enrichment is found immediately below the sulfide layer. This enrichment probably takes place during the exposure of the substrate surface to atmosphere before the sulfiding treatment. The mechanism of the impeding effect of palladium on sulfiding is assumed to be a decrease in diffusion from the bulk alloy to the surface due to the enriched layer. The effect cannot be explained by changes in the electronic structure of the alloy due to palladium alloying.

📜 SIMILAR VOLUMES

Effects of porcelain application procedu
Effects of porcelain application procedures on two noble alloys
✍ M. Bagby; S. J. Marshall; G. W. Marshall Jr. 📂 Article 📅 1990 🏛 Wiley (John Wiley & Sons) 🌐 English ⚖ 637 KB

## Abstract Distortion of ceramometal restorations during porcelain application is often attributed to mismatch of thermal expansion coefficients. Little attention has been paid to treatment the metal receives after casting. Oxide formation, lattice parameter changes, and macroscopic distortion wer

Effect of plastic deformation on resisti
Effect of plastic deformation on resistivity of gold-palladium alloys
✍ H.J Logie; J Jackson; J.C Anderson; F.R.N Nabarro 📂 Article 📅 1961 🏛 Elsevier Science ⚖ 755 KB

The effect of plastic deformation on the resistivity of gold-palladium alloys of various stomic compositions was observed. The resistivity was found to decrease on plastic strain for alloys containing between 10 and 60 at. y0 palladium. The other alloys in the series showed an increase in resistivi