US 5,288,344 A · Berylllium bearing amorphous metallic alloys formed by low cooling rates

Abstract

Alloys which form metallic glass upon cooling below the glass transition temperature at a rate appreciably less than 10.sup.6 K/s comprise beryllium in the range of from 5 to 52 atomic percent and at least one early transition metal in the range of from 30 to 75% and at least one late transition metal in the range of from 2 to 52%. A preferred group of metallic glass alloys has the formula (Zr.sub.1-X Ti.sub.X).sub.a (Cu.sub.1-y Ni.sub.y).sub.b Be.sub.c. Generally, a is in the range from 30 to 75% and the lower limit increases with increasing x. When x is in the range of from 0 to 0.15, b is in the range of from 5 to 52%, and c is in the range of from 6 to 47%. When x is in the range of from 0.15 to 0.4, b is in the range of from 5 to 52%, and c is in the range of from 5 to 47%. When x is in the range of from 0.4 to 0.6, b is in the range of from 5 to 52%, and c is in the range of from 5 to 47%. When x is in the range of from 0.6 to 0.8, b is in the range of from 5 to 52%, and c is in the range of from 5 to 42%. When x is in the range of from 0.8 to 1, b is in the range of from 5 to 52%, and c is in the range of from 5 to 30%. Other elements may also be present in the alloys in varying proportions.

Claims57

Dependent claims

A metallic glass formed of an alloy having the formula

(Zr.sub.1-zx Ti.sub.x).sub.a1 ETM.sub.a2 (Cu.sub.1-y Ni.sub.y).sub.b1 LTM.sub.b2 Be.sub.c
where x and y are atomic fractions, and a1, a2, b1, b2, and c are atomic percentages, wherein:
ETM is at least one early transition metal selected from the group consisting of V, Nb, Hf, and Cr, wherein the atomic percentage of Cr is no more than 0.2a1;
LTM is a late transition metal selected from the group consisting of Fe, Co, Mn, Ru, Ag and Pd;
a2 is in the range of from 0 to 0.4a1;
x is in the range of from 0 to 0.4;
and
y is in the range of from 0 to 1;
and
(A) when x is in the range of from 0 to 0.15:
(a1+a2) is in the range of from 30 to 75%,
(b1+b2) is in the range of from 5 to 52%,
b2 is in the range of from 0 to 25%, and
c is in the range of from 6 to 47%;
(B) when x is in the range of from 0.15 to 0.4:
(a1+a2) is in the range of from 30 to 75%,
(b1+b2) is in the range of from 5 to 52%,
b2 is in the range of from 0 to 25%, and
c is in the range of from 5 to 47%.

16 more elements

A metallic glass formed of an alloy having the formula

(Zr.sub.1-x Ti.sub.x).sub.a (Cu.sub.1-y Ni.sub.y).sub.b Be.sub.c
where x and y are atomic fractions, a, b and c are atomic percentages, wherein y is in the range of from 0 to 1, x is in the range of from 0.4 to 1, and wherein:
(A) when x is in the range of from 0.4 to 0.6:
a is in the range of from 35 to 75%,
b is in the range of from 5 to 52%, and
c is in the range of from 5 to 47%;
(B) when x is in the range of from 0.6 to 0.8:
a is in the range of from 38 to 75%,
b is in the range of from 5 to 52%, and
c is in the range of from 5 to 42%;
and
(C) when x is in the range of from 0.8 to 1:
a is in the range of from 38 to 75%,
b is in the range of from 5 to 52%, and
c is in the range of from 5 to 30%, under the constraint that 3c is up to (100-b) when b is in the range of from 10 to 43.

12 more elements

A metallic glass formed of an alloy having the formula

((Zr,Hf,Ti).sub.x ETM.sub.1-x).sub.a Cu.sub.b1 Ni.sub.b2 LTM.sub.b3 Be.sub.c
where x is an atomic fraction, and a, b1, b2, b3 and c are atomic percentages;
LTM is a late transition metal selected from the group consisting of Ni, Cu, Fe, Co, Mn, Ru and Pd;
x is in the range of from 0.5 to 0.8;
ETM is an early transition metal selected from the group consisting of V, Nb, Y, Nd, Gd and other rare earth elements, Cr, Mo, Ta and W;
wherein
(A) when ETM is selected from the group consisting of Y, Nd, Gd, and other rare earth elements:
a is in the range of from 30 to 75%;
(b1+b2+b3) is in the range of from 6 to 50%,
b3 is in the range of from 0 to 25%,
b1 is in the range of from 0 to 50%, and
c is in the range of from 6 to 45%;
(B) when ETM is selected from the group consisting of Cr, Ta, Mo and W:
a is in the range of from 30 to 60%;
(b1+b2+b3) is in the range of from 10 to 50%,
b3 is in the range of from 0 to 25%,
b1 is in the range of from 0 to x(b1+b2+
b3)/2, and
c is in the range of from 10 to 45%;
and
(C) when ETM is selected from the group consisting of V and Nb:
a is in the range of from 30 to 65%;
(b1+b2+b3) is in the range of from 10 to 50%,
b3 is in the range of from 0 to 25%,
b1 is in the range of from 0 to x(b1+b2+b3)/2, and
c is in the range of from 10 to 45%.

23 more elements

Dependencies are inferred from the claim text.

Berylllium bearing amorphous metallic alloys formed by low cooling rates

Life of this patent

Berylllium bearing amorphous metallic alloys formed by low cooling rates

Life of this patent

Abstract

Claims57