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Journal of Dental Research, Vol 61, 673-677, Copyright © 1982 by International & American Associations for Dental Research Online Journals

ARTICLES

Precipitations in a dental Ag-Pd-Cu-Au alloy

H. Hero, R. Jorgensen, E. Sorbroden and E. Suoninen

The structure of a dental Ag-PD-Cu-Au alloy has been studied after centrifugal casting and various heat treatments. By transmission electron microscopy, a high density of small fct particles, assumed to be PdCu, was observed, but, in addition, finely-spaced rods of approximately equal to 0.05 micrometer (500 A) diameter with an fcc structure precipitated on the [100] planes of the matrix were found. On the basis of their structure and the pertaining lattice parameter, these rods are assumed to be Cu-rich. They could also be observed by scanning electron microscopy, but not at annealing temperatures lower than 425 degrees C.




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