Frank D Gac

US Patent:

49277928, May 22, 1990

Filed:

Jun 5, 1989

Appl. No.:

7/362112

Inventors:

John J. Petrovic - Los Alamos NM
David H. Carter - Los Alamos NM
Frank D. Gac - Los Alamos NM

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

C04B 3556
C04B 3558

US Classification:

501 92

Abstract:

A composition consisting of an intermetallic compound, molybdenum disilicide, which is reinforced with VS silicon carbide whiskers dispersed throughout it and a method of making the reinforced composition. Use of the reinforcing material increases fracture toughness at low temperatures and strength at high temperatures, as compared to pure molybdenum disilicide.

US Patent:

50008960, Mar 19, 1991

Filed:

Mar 15, 1990

Appl. No.:

7/493642

Inventors:

John J. Petrovic - Los Alamos NM
David H. Carter - Los Alamos NM
Frank D. Gac - Los Alamos NM

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

C04B 3556
C04B 3558

US Classification:

264 86

Abstract:

A composition consisting of an intermetallic compound, molybdenum disilicide, which is reinforced with VS silicon carbide whiskers dispersed throughout it and a method of making the reinforced composition. Use of the reinforcing material increases fracture toughness at low temperatures and strength at high temperatures, as compared to pure molybdenum disilicide.

US Patent:

49693867, Nov 13, 1990

Filed:

Jan 3, 1990

Appl. No.:

7/460478

Inventors:

Donald J. Sandstrom - Santa Fe NM
Noel C. Calkins - Los Alamos NM
Frank D. Gac - Los Alamos NM

Assignee:

The United States of America as represented by the United States
Department of Energy - Washington DC

International Classification:

F41H 504

US Classification:

89 3602

Abstract:

An armor system in which a plurality of constraint cells are mounted on a surface of a substrate, which is metal armor plate or a similar tough material, such that the cells almost completely cover the surface of the substrate. Each constraint cell has a projectile-receiving wall parallel to the substrate surface and has sides which are perpendicular to and surround the perimeter of the receiving wall. The cells are mounted such that, in one embodiment, the substrate surface serves as a sixth side or closure for each cell. Each cell has inside of it a plate, termed the front plate, which is parallel to and in contact with substantially all of the inside surface of the receiving wall. The balance of each cell is completely filled with a projectile-abrading material, which is a ceramic material in particulate form dispersed in a polymeric matrix.

US Patent:

47268298, Feb 23, 1988

Filed:

Dec 16, 1986

Appl. No.:

6/942148

Inventors:

Frank D. Gac - Los Alamos NM
Rodger D. Blake - Santa Fe NM
Delbert E. Day - Rolla MO
John S. Haggerty - Lincoln MA

Assignee:

The United States of America as represented by the Department of Energy - Washington DC

International Classification:

C03B 1910

US Classification:

65 214

Abstract:

A method for making uniform spherical shells. The present invention allows niform hollow spheres to be made by first making a void in a body of material. The material is heated so that the viscosity is sufficiently low so that the surface tension will transform the void into a bubble. The bubble is allowed to rise in the body until it is spherical. The excess material is removed from around the void to form a spherical shell with a uniform outside diameter.