Abstract:Cu₅₀Zr₄₀Ti₁₀ bulk amorphous alloys were fabricated by hot pressing gas-atomized Cu₅₀Zr₄₀Ti₁₀ amorphous powder under different consolidation conditions without vacuum and inert gas protection. The consolidation conditions of the Cu₅₀Zr₄₀Ti₁₀ amorphous powder were investigated based on an L₉(3⁴) orthogonal design. The compression strength and strain limit of the Cu₅₀Zr₄₀Ti₁₀ bulk amorphous alloys can reach up to 1090.4 MPa and 11.9 %, respectively. The consolidation pressure significantly influences the strain limit and compression strength of the compact. But the mechanical properties are not significantly influenced by the consolidation temperature. In addition, the preforming pressure significantly influences not the compression strength but the strain limit. The optimum consolidation condition for the Cu₅₀Zr₄₀Ti₁₀ amorphous powder is first precompacted under the pressure of 150 MPa, and then consolidated under the pressure of 450 MPa and the temperature of 380 °C.

Key words: hot pressing; Cu-based amorphous alloy; strain limit; consolidation; mechanical property