Rapidly solidified strips of Cu-Cr alloys

A Cu-Cr alloy with nano and microscale Cr particles produced in a water-cooled copper mold

“…The increase of their volume fraction during subsequent heat treatment is consistent with the increase in the hardness of the sample, and it implies that during heat treatment, coherent precipitates form and contribute effectively in strengthening of the material [17]. Stobrawa et al [18] and Corria et al [19] reported the similar results in Cu-Cr and Cu-Cr-Zr systems. They believed that precipitates in diameters of 3 and 4 nm were the most effective particles in strengthening of the above alloys, respectively.…”

The effect of cobalt additions on the mechanical and electrical properties of Cu–Cr–Zr melt-spun ribbons

“…8. A mean size of 5 nm was measured for such precipitates, in agreement with the size reported on meltspun Cu-Cr-Zr ribbons in previous investigations [14,19,20]; which also mention that those precipitates are responsible for the improved mechanical properties of ribbons in comparison to the as-spun condition. Precipitation monitoring in the TEM, by electron diffraction or EDS, of any Cu-Zr compound in the peakhardness condition proved difficult because of the extremely small size of Cu-Zr precipitates at that stage.…”

Experimental determination and thermodynamic calculation of the phase equilibria in the Cu–Cr–Nb and Cu–Cr–Co systems

“…Co and Nb are important alloying elements to improve the properties of the dielectric strength and corrosion resistance in the Cu-Cr base alloys, respectively [5][6][7][8]. Knowledge of phase diagrams of the Cu-Cr-Nb and Cu-Cr-Co systems is of importance to the development of the high-conductivity and high-strength materials.…”