High strength amorphous alloy

C - Chemistry – Metallurgy – 22 – C

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75/1.1

C22C 45/00 (2006.01)

Patent

CA 2037818

A high strength amorphous alloy comprises an amorphous phase containing a predominant metal element, a first additive element consisting rare earth element(s), and a second additive element consisting of element(s) other than rare earth elements and forming a matrix, and a crystalline phase containing the predominant metal element and the first and second additive elements and dispersed homogeneously in the amorphous phase with the first and second additive elements formed into a supersaturated solid solution. The content of the predominant metal element in the crystalline phase is set in a range of at least 85% by atom to at most 99.8% by atom. If the rare earth element ratio value CR in the crystalline phase is defined as being CR = a / a + b wherein a represents the content, % by atom, of a rare earth element which is the first additive element, and k represents the content, % by atom, of the second additive element, and the rare earth element ratio value CR is set at 0.5 or less.

Un alliage amorphe à grande résistance est composé d'une phase amorphe contenant un élément métallique prédominant, un premier élément d'addition constitué d'un ou de terres rares et d'un second constitué d'éléments autres que des terres rares, qui forment une matrice, et est composé d'une phase cristalline contenant l'élément métallique prédominant ainsi que le premier et le second élément d'addition; cette phase est dispersée de manière homogène dans la phase amorphe et le premier et le second élément d'addition sont en solution solide sursaturée. La teneur de l'élément métallique prédominant de la phase cristalline est fixée en proportion atomique à au moins 85 % et au plus 99,8 %. Si le rapport critique RC du terre rare dans la phase cristalline est défini comme étant RC = a/a+b où a correspond à la teneur en proportion atomique d'un terre rare qui est le premier élément d'addition, et où k correspond à la teneur en proportion atomique d'un terre rare qui est le deuxième élément d'addition, et que le RC est fixé à 0,5 ou moins.

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