Amorphous metal alloys in the beryllium-titanium-zirconium system

• US 4,050,931 A
• Filed: 07/27/1976
• Issued: 09/27/1977
• Est. Priority Date: 08/13/1975
• Status: Expired due to Term

• Current Assignee: Allied Chemical Corporation (Honeywell International Inc.)
• Original Assignee: Allied Chemical Corporation (Honeywell International Inc.)
• Inventors: Ray, Ranjan, Cline, Carl F., Tanner, Lee Elliot
• Primary Examiner(s): Steiner, Arthur J.
• Application Number:
  US05/709,028
• Time in Patent Office: 427 Days
• Field of Search: 75/175.5, 75/176, 75/177, 75/150, 75/134 N
• US Class Current: 148/403
• CPC Class Codes: C22C 45/06 with beryllium as the major constituent
• CPC Class Codes: C22C 45/10 with molybdenum, tungsten, niobium, tantalum, titanium, or zirconium or Hf as the major constituent

Abstract

Amorphous metal alloys are prepared from compositions in the beryllium-titanium-zirconium system. The compositions, in the form of long, continuous ribbon, are defined within an area on a ternary diagram having as its coordinates in atom percent beryllium, atom percent titanium, and atom percent zirconium, the area being defined by a polygon having at its corners the 10 points defined by

A. 40% Be, 58% Ti, 2% Zr

B. 35% Be, 57% Ti, 8% Zr

C. 30% Be, 55% Ti, 15% Zr

D. 30% Be, 20% Ti, 50% Zr

E. 35% Be, 0% Ti, 65% Zr

F. 45% Be, 0% Ti, 55% Zr

G. 55% Be, 15% Ti, 30% Zr

H. 55% Be, 20% Ti, 25% Zr

I. 50% Be, 35% Ti, 15% Zr

J. 43% Be, 53% Ti, 4% Zr.

These alloys evidence high strength, low density, a specific strength of at least about 33 × 10⁵ cm and good ductility. The alloys are useful in applications requiring a high strength-to-weight ratio.

Claims

1. A high strength, low density metal alloy that is substantially amorphous, characterized in that the alloy consists essentially of a composition being defined within an area on a ternary diagram having as its coordinates in atom percent Be, atom percent Ti, and atom percent Zr, said area being defined by a polygon having at its corners the 10 points defined by

a. 40% Be, 58% Ti, 2% Zr

b. 35% Be, 57% Ti, 8% Zr

c. 30% Be, 55% Ti, 15% Zr

d. 30% Be, 20% Ti, 50% Zr

e. 35% Be, 0% Ti, 65% Zr

f. 45% Be, 0% Ti, 55% Zr

g. 55% Be, 15% Ti, 30% Zr

h. 55% Be, 20% Ti, 25% Zr

i. 50% Be, 35% Ti, 15% Zr

j. 43% Be, 53% Ti, 4% Zr.

2. The amorphous alloy of claim 1 in which the alloy consists essentially of a composition being defined within an area on said ternary diagram, said area being defined by a polygon having at its corners the eight points defined by

a. 40% Be, 58% Ti, 2% Zr

b. 35% Be, 57% Ti, 8% Zr

k. 35% Be, 50% Ti, 15% Zr

l. 40% Be, 35% Ti, 25% Zr

m. 45% Be, 25% Ti, 30% Zr

n. 50% Be, 25% Ti, 25% Zr

i. 50% Be, 35% Ti, 15% Zr

j. 43% Be, 53% Ti, 4% Zr.

3. The amorphous alloy of claim 1 in which the alloy is represented by the formula Be₄₀ Ti_60-x Zr_x, where "x" ranges from about 2 to 30 atom percent.

4. The amorphous alloy of claim 3 in which "x" ranges from about 2 to 10 atom percent.

5. The amorphous alloy of claim 4 having the composition Be₄₀ Ti₅₀ Zr₁₀.