Rapidly quenched alloys of copper with rare-earth metals

Abstract

1. Rapid quenching of binary alloys of Cu with 5–15% REM at a rate of 5·104–8·106 °C/sec leads to preparation of highly dispersed microcrystalline and amorphous-crystalline tapes with a thickness of 35–50 μm distinguished by increased strength, hardness, and specific electrical resistivity. 2. Rapidly quenched alloys of copper with 5–15% REM contain a metastable supersaturated solid solution based on copper with a fcc-lattice, metastable M-phase, and an amorphous phase whose amount is governed by the nature of the specific alloying component (REM) and the melt cooling rate (more than 105 °C/sec). 3. Metastable M-phase on heating at rate of 0.3°C/sec at 300–350°C is converted into equilibrium compounds of the corresponding systems.