Patent ID: 8333924

Claim:
A high-strength and high-toughness magnesium alloy comprising: a atom % in total of at least one metal of Cu, Ni, and Co; and b atom % in total of at least one element selected from the group consisting of Y, Dy, Er, Ho, Gd, Tb, and Tm, wherein a and b satisfy the following formulae (1) to (3), 0.2≦ a≦ 10 (1) 0.2≦ b≦ 10 (2) 2/3 a− 2/3< b, (3) said high-strength and high-toughness magnesium alloy has a long-period stacking ordered structure phase, and said high-strength and high-toughness magnesium alloy does not contain Zn.