T.L. Li

Consolidation of Cu based amorphous powder by hot pressing method

Abstract Amorphous Cu50Zr40Ti10 powder was fabricated in the particle size range <50 μm by gas atomisation method. Gas atomised Cu50Zr40Ti10 amorphous powder exhibits the glass transition temperature Tg of 629·5 K and the crystallisation temperature Tx of 693·2 K respectively. The gas atomised Cu50Zr40Ti10 amorphous powder possesses a high supercooled liquid region ΔTx of 63·7 K suitable for being hot pressed. In addition, the Cu50Zr40Ti10 amorphous powders were consolidated by hot pressing method based on an L9(34) orthogonal design. The optimum consolidation condition for the Cu50Zr40Ti10 amorphous powder is first precompacted under the pressure of 75 MPa, and then consolidated under the pressure of 450 MPa at the temperature of 380°C respectively. The significance of three factors is examined by the analysis of variance for the density and thermal conductivity respectively. The effect of three factors on the density and thermal conductivity is also discussed.