Amorphous alloys superior in mechanical strength, corrosion...

C - Chemistry – Metallurgy – 22 – C

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75/1.1

C22C 45/08 (2006.01) C22C 45/00 (2006.01)

Patent

CA 2020338

The present invention provides an amorphous alloy having superior mechanical strength, corrosion resistance and formability, at a relatively low cost. The amorphous alloy is a composition represented by the general formula: Al100-x-yMxLny wherein M is at least one element selected from the group consisting of Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zr, Nb, Mo, Hf, Ta and W; Ln is at least one element selected from the group consisting of Y, La, Ce, Nd, Sm, Gd, Tb, Dy, Ho and Yb or misch metal (Mm) which is a combination of rare earth elements; and x and y are, in atomic percentages: 0 < x ~ 55 and 30 ~ y ~ 90, preferably 0 < x ~ 40 and 35 ~ y ~ 80, and more preferably 5 < x ~ 40 and 35 ~ y ~ 70, the alloy having at least 50% (by volume) of an amorphous phase.

La présente invention concerne un alliage amorphe ayant des caractéristiques supérieures du point de vue de la résistance mécanique, de la résistance à la corrosion et de la formabilité, à un coût de revient relativement faible. L'alliage amorphe est une composition représentée par la formule générale : Al100-x-yMxLny où M est au moins un élément choisi dans le groupe constitué de Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zr, Nb, Mo, Hf, Ta et W; Ln est au moins un élément choisi dans le groupe constitué de Y, La, Ce, Nd, Sm, Gd, Tb, Dy, Ho et Yb ou du mischmétal (Mm) qui est une combinaison d'éléments de terres rares; et x et y sont, en pourcentages atomiques : 0 < x ~ 55 et 30 ~ y ~ 90, préférablement 0 < x ~ 40 et 35 ~ y ~ 80, et encore mieux, 5 < x ~ 40 et 35 ~ y ~ 70, l'alliage étant constitué à au moins 50 % (en volume) d'une phase amorphe.

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