Amorphous metal alloys and products thereof

• US 4,116,682 A
• Filed: 12/27/1976
• Issued: 09/26/1978
• Est. Priority Date: 12/27/1976
• Status: Expired due to Term

• Current Assignee: Bill C. Giessen, Donald E. Polk
• Original Assignee: Bill C. Giessen, Donald E. Polk
• Inventors: Giessen, Bill C., Polk, Donald E.
• Primary Examiner(s): Steiner, Arthur J.
• Application Number:
  US05/754,537
• Time in Patent Office: 638 Days
• Field of Search: 75/126, 75/128, 75/122, 75/170, 75/171, 75/176, 75/134 M, 75/134 F, 75/123 B, 75/123 E, 75/123 A, 75/123 D, 75/123 H, 75/123 J , 75/123 K, 75/123 N, 75/123 L, 75/123 M
• US Class Current: 148/403
• CPC Class Codes: C22C 45/008 with Fe, Co or Ni as the major constituent C22C45/02, C22C45/04 take precedence

Abstract

A class of amorphous metal alloys is provided in which the alloys are rich in iron, nickel, cobalt, chromium and/or manganese. These alloys contain at least one element from each of three groups of elements and are low in metalloids compared to previously known liquid quenched amorphous alloys rich in iron, nickel, cobalt, chromium and/or manganese. The alloys can be readily formed in the amorphous state and are characterized by high hardness, high elastic limit and, for selected compositions, good corrosion resistance. Products made from these alloys include cutting tools, such as razor blades.

Claims

1. An amorphous metal alloy of the formula M_a T_b X_c which is substantially amorphous when rapidly cooled to the solid state wherein M is at least one element selected from the group consisting of Fe, Co, Ni, Cr and Mn and mixtures thereof, T is at least one element selected from the group consisting of Zr, Ta, Nb, Mo, W, Y, Ti and V and mixtures thereof, and X is at least one element selected from the group consisting of B, Si, P, C, Ge and As and mixtures thereof, wherein a, b and c are atomic percentages ranging from about 60 to 87, 3 to 30, and 1 to 10, respectively, said a, b and c totalling 100 in any one alloy.

2. An amorphous metal alloy, according to claim 1, wherein a, b, and c range from 70-85, 6 to 20, and 5 to 10, respectively.

3. As an article of manufacture, sheets, ribbons and fibers of the amorphous metals having the composition of claim 1.

4. As an article of manufacture, sheets, ribbons and fibers of the amorphous metals having the composition of claim 2.

7. An amorphous metal alloy, according to claim 1, wherein b and c added together range from 13-40 in any one alloy.

5. A cutting implement formed from a metal which is substantially amorphous, said metal having the composition M_a T_b X_c wherein M is at least one element selected from the group consisting of Fe, Co, Ni, Cr and Mn and mixtures thereof, T is at least one element selected from the group consisting of Zr, Ta, Nb, Mo, W, Y, Ti and V and mixtures thereof, and X is at least one element selected from the group consisting of B, Si, P, C, Ge and As and mixtures thereof, wherein a, b and c are atomic percentages ranging from about 60 to 87, 3 to 30, and 1 to 10, respectively, said a, b and c totalling 100 in any one composition.

6. A cutting implement, according to claim 5, wherein a, b and c range from 70 to 85, 6 to 20, and 5 to 10, respectively.

8. A cutting implement, according to claim 5, wherein b and c added together range from 13- 40 in any one composition.