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Effects of Strain on Solid‐Solution Formation in an Ag‐Pd Paste
Author(s) -
WALKER G.A.
Publication year - 1971
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1971.tb12270.x
Subject(s) - solid solution , materials science , homogeneous , conductor , orthosilicate , diffraction , strain (injury) , composite material , chemical engineering , metallurgy , thermodynamics , nanotechnology , optics , medicine , tetraethyl orthosilicate , physics , engineering
A paste of Ag‐Pd in orthosilicate glass, when fired, forms a useful conductor for the semiconductor industry. To understand the interaction of the Ag and Pd during firing, the paste and the fired conductor were studied by X‐ray diffraction analysis. A complete structural analysis of 80% Ag‐2% Pd pastes and the starting Ag and Pd revealed that the initial structure of the Pd controlled the final form of the solid solution in the fired conductor, Pastes made from Pd with internal strain and faulting gave inhomogeneous solid solutions in the temperature ranges studied, whereas pastes made from Pd with no internal strain or faulting gave homogeneous solid solutions. Kinetic studies were made in an effort to under‐ stand the mechanism of the Ag‐Pd reaction for different structural types of Pd. A model mechanism is proposed, and possible effects on the physical characteristics of the pastes are noted.