Supercooling, isothermal soaking and liquid phase separation of Cu–Co alloys

Liquid phase separation of Cu–Cr alloys during the vacuum breakdown

“…It can be easily observed that small spheroids can be coagulated to form larger ones, as denoted by arrow A. The above results, in combination with the microstructures of deep supercooled and melt-spun metastable Cu-Co [19][20][21][22][23][24][25][26], Cu-Fe [23,27] and Cu-Cr [28][29][30][31] alloys, show that a liquid phase separation is involved in the microstructure evolution. The Cr-rich phase in the breakdown Cu 60 Cr 40 alloy, therefore, results from the liquid phase separation.…”

“…The Cu-Cr system, similar to the Cu-Co [19][20][21][22][23][24][25][26] and Cu-Fe [23,27] systems, is a liquid metastable binary system with a large positive heat of mixing. Zeng et al [32] obtained a liquid metastable miscibility gap (MG) by thermodynamic calculation.…”

“…3, are formed after the melt layer is solidified. Generally, the process of the liquid phase separation can be divided into several stages: formation of droplets, growth and accumulation of the droplets, second liquid phase separation, and solidification of the droplets according to published studies [19][20][21][22][23]34]. Rapid cooling plays an essential role in the formation of a large supercooling.…”

Formation of macroscopic phase-separated dual-layer melt-spun ribbon from Co–Si–B–Cu alloy

“…The Co-Cu alloy has a metastable liquid miscibility gap below the liquidus temperature owing to the large heat of mixing [6][7][8][9][10][11][12][13][14][15]. In this paper, we report the preparation of a rapidly solidified ribbon of Co-Si-B-Cu alloy by the conventional single-roller melt-spinning method and the formation of a macroscopically phase-separated dual-layer structure.…”

Shape Anisotropy Evolution of Co Grains in Cu-30at%Co Alloy by Annealing under Magnetic Field

“…It has been reported that two liquid phase separation occurs in the undercooled melt. [21][22][23][24][25][26][27][28] It is expected to obtain the microstructure in which fine Co grains are uniformly distributed when the two liquid phase separation occurs and rapidly solidifies. This paper shows the influence of the magnetic field on the coarsening process of the fcc-Co grains with a small crystalline magnetic anisotropy.…”