John David Weyand

US Patent:

40975673, Jun 27, 1978

Filed:

Aug 25, 1976

Appl. No.:

5/717698

Inventors:

John D. Weyand - Greensburg PA

Assignee:

Aluminum Company of America - Pittsburgh PA

International Classification:

C04B 3332
C04B 3564

US Classification:

264 65

Abstract:

The method including blending 90 parts by weight titanium diboride and 10 parts by weight boron nitride, cold isostatically pressing the blend to a shape at 60,000 pounds per square inch pressure, and sintering the shape at 1975. degree. C in an inert atmosphere.

US Patent:

46235558, Nov 18, 1986

Filed:

Apr 25, 1985

Appl. No.:

6/727379

Inventors:

John D. Weyand - Greensburg PA

Assignee:

Aluminum Company of America - Pittsburgh PA

International Classification:

B05D 108

US Classification:

427 34

Abstract:

A method of making a region exhibiting a range of compositions, comprising plasma spraying various compositions on top of one another onto a base.

US Patent:

45004064, Feb 19, 1985

Filed:

Dec 12, 1983

Appl. No.:

6/560602

Inventors:

John D. Weyand - Greensburg PA
Robert W. Woods - New Kensington PA
David H. DeYoung - Plum Boro PA
Siba P. Ray - Plum Boro PA

Assignee:

Aluminum Company of America - Pittsburgh PA

International Classification:

C25B 1104

US Classification:

204293

Abstract:

An inert electrode connection is disclosed wherein a layer of inert electrode material is bonded to a layer of conductive material by providing at least one intermediate layer of material therebetween comprising a predetermined ratio of inert material to conductive material. In a preferred embodiment, the connection is formed by placing in a die a layer of powdered inert material, at least one layer of a mixture of powdered inert material and conductive material, and a layer of powdered conductive material. The connection is then formed by pressing the material at 15,000-20,000 psi to form a powder compact and then densifying the powder compact in an inert or reducing atmosphere at a temperature of 1200. degree. -1500. degree. C.

US Patent:

47241217, Feb 9, 1988

Filed:

Apr 25, 1985

Appl. No.:

6/727377

Inventors:

John D. Weyand - Greensburg PA

Assignee:

Aluminum Company of America - Pittsburgh PA

International Classification:

B22F 100

US Classification:

419 19

Abstract:

(1) A process comprising spray drying a powder-containing slurry, the slurry containing a powder constituent susceptible of oxidizing under the temperature conditions of the spray drying, while reducing the tendency for oxidation of the constituent by including as a liquid constituent of the slurry an organic liquid; (2) a process comprising spray drying a powder-containing slurry, the powder having been pretreated to reduce content of a powder constituent susceptible of oxidizing under the temperature conditions of the spray drying, the pretreating comprising heating the powder to react the constituent; and (3) a process comprising reacting ceramic powder, grinding the reacted powder, slurrying the ground powder, spray drying the slurried powder, and blending the dried powder with metal powder.