Research of Heat Resistance and Thermophysical Properties of the Diffusion Zone Formed by Annealing by Contact Melting Mode of the Layered Metal-Intermetallic Composite of the Cu-Al System

Abstract:

The results of studying the effect of isothermal annealing on structural, phase transformations, and thermal diffusivity in the diffusion zone of a Cu-Al layered metal-intermetallic composite (LMIC), obtained using technology including explosion welding, pressure treatment and heat treatment, are presented. It was found that, at 530 °C (the highest temperature, excluding the formation of a liquid phase in this system) with a holding time of up to 1000 h, there are no structural phase transformations in the Al (Cu)/CuAl₂ metal-intermetallic composition, and a slight increase in its mass is associated with the formation of a thin dense protective oxide film on the surface. The thermal diffusivity of Cu-Al LMIC, obtained after removal of copper residues from the surface of the diffusion zone, is 50–60 W/m×K, which is significantly lower than that of copper (410 W/m×K) and aluminum (220 W/m×K).

• Periodical: Solid State Phenomena (Volume 316)
• Pages: 857-861
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.316.857
• Online since: April 2021
• Authors: Leonid M. Gurevich, Oleg V. Slautin*, Dmitriy V. Pronichev
• Keywords: Contact Melting, Diffusion Zone, Explosion Welding, Heat Resistance, Microhardness, Phase Composition, Thermal Diffusivity

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