Electron Diffraction Study on Ordered Alloys of the Coppe-Gold-Palladium System : I. Ordered Alloys of Cu_2AuPd and CuAu_2Pd
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An electron diffraction study on ternary alloys of the copper-gold-palladium system was carried out by using evaporated single crystal films and the following results were obtained: The superlattice structure of Cu_2AuPd is not of the CuAuI type, as proposed by Raub and Worwag but of a modified CuAuI type belonging to the space group D^1_<4h>-4/mmm. Furthermore, it was found that an ordered alloy CuAu_2 Pd exists and its superlattice structure is also of the modified CuAuI type, identical with that of Cu_2AuPd. The temperatures of the order-disorder transformation were estimated at about 550℃ and 430℃ for both alloys of nearly stoichiometric compositions, Cu_2AuPd and CuA_2pd. The tetragonality, c/a, varies from O.92 at 500℃ to 0.87 at 300℃ for Cu_2AuPd, and from O.98 at 400℃ to O.93 at 200℃ for CuAu_2Pd.
- 社団法人日本物理学会の論文
- 1966-05-05
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