The C14phaseNb(Cr1-xCox)(2) forms within a broad homogencity range of 0.127(3) <= x <= 0.937(8) at 1100 degrees C. The distribution of chromium and cobalt atoms on the crystallographic positions 2a and 6h has been studied by a single crystal structure analysis and a statistical mechanics approach using energies from firs-principles full potential electronic structure calculations. For the first time
The present study is on the effect of mechanical milling of gas-atomized powders on mechanical properties of the hot-pressed and subsequently hot-rolled Cu-8 at% Cr-4 at% Nb alloy with a microstructure consisting of pure copper matrix hardened by intermetallic Cr2Nb precipitates. The mechanically milled powders result in lower sintering temperature during hot pressing compared to the atomized powders. The hot-pressed samples made from the milled powder exhibit significantly higher hardness and tensile strength, but lower ductility and electrical conductivity compared to that made from the un-milled gas-atomized powders. The hot rolling results in marginal increase in strength, but significant increase in ductility compared to the hot-pressed alloy for both the milled and atomized powders and it is attributed to the decrease in size of the pores and amount of porosities after hot rolling. (C) 2013 Elsevier B.V. All rights reserved.
Diffusion of Nb with Cr, Fe, Ni, Mo, and stainless steel