Co-Cu alloys produced by mechanical alloying of powder precursors characterized by different contact surface and energy excess
Physics of Metals and Metallography, ISSN: 0031-918X, Vol: 107, Issue: 5, Page: 478-483
2009
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Article Description
Co-Cu alloys were prepared by mechanical alloying using different reaction mixtures (mechanical mixture of Co and Cu powders, composite powders (Co P) /Cu with a crystalline core, and composite powders (CoP ) /Cu with an amorphous core). The use of a complex of structural and magnetostructural methods showed that these alloys are nonuniform nanocomposite materials consisting of two phases, namely, copper- and cobalt-based solid solutions. During the mechanical alloying of the composite powders, parameters that are sensitive to the short-range-order structure of both phases were found to be changed, namely, the lattice parameter in the Cu-based solid solution as determined from X-ray diffraction patterns, and the Bloch constant that is sensitive to the short-range order in the Co-based solid solution change. In the alloys prepared by mechanical alloying of composite powders with an amorphous core, the lattice parameter a and the Bloch constant B reach values corresponding to metastable Co Cu solid solutions in milling times of 1.5-2.0 h. These times are lower by 1-2 orders of magnitude than the typical times that are necessary for forming metastable Co-Cu solid solutions by standard methods of mechanical alloying from mixtures of powders. © 2009 Pleiades Publishing, Ltd.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=65949115077&origin=inward; http://dx.doi.org/10.1134/s0031918x09050081; http://link.springer.com/10.1134/S0031918X09050081; http://www.springerlink.com/index/pdf/10.1134/S0031918X09050081; http://link.springer.com/content/pdf/10.1134/S0031918X09050081; http://link.springer.com/content/pdf/10.1134/S0031918X09050081.pdf; http://link.springer.com/article/10.1134/S0031918X09050081/fulltext.html; http://www.springerlink.com/index/10.1134/S0031918X09050081; https://dx.doi.org/10.1134/s0031918x09050081; https://link.springer.com/article/10.1134/S0031918X09050081
Pleiades Publishing Ltd
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