Abstract
The change in axial ratio c/a of the CuAu L10-type ordered alloy with the addition of the third element X was examined. All the ternary alloys prepared were constructed by substituting X for corresponding amount of Au in the CuAu, where X was Ni and Ag. Further, Cu-Au binary system was picked up. The results obtained by X-ray diffraction method showed that, the axial ratio increased with composition y, fairly rapidly for the CuAu1−yNiy and gradually for the CuAu1−yAgy. In the Cu-Au system, it increased with deviation of composition from stoichiometry.The experimental results, together with those published before for the CuAu1−yPdy, were analized taking into account of two energy terms; the repulsive interaction acting between ion cores and the electrostatic energy of ions occupying lattice sites. They were expressed as a function of the axial ratio by applying the Bragg-Williams method. The numerical results of c/a under the assumption of maximum degree of order S explained qualitatively the observation in the Cu-Au and CuAu1−yPdy but failed for the CuAu1−yNiy and CuAu1−yAgy. For the latter two systems, however, using the values of S obtained from X-ray intensity measurements, the recalculated results reproduced well the observed facts.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Journal of the Japan Institute of Metals and Materials
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
