Robert E Rapp

US Patent:

51496780, Sep 22, 1992

Filed:

Jul 12, 1990

Appl. No.:

7/551487

Inventors:

Terry D. Claar - Newark DE
William B. Johnson - Newark DE
Robert A. Rapp - Columbus OH

Assignee:

Lanxide Technology Company, LP - Newark DE

International Classification:

C04B 3510

US Classification:

501134

Abstract:

The present invention relates to a novel method of manufacturing a composite body, such as a ZrB. sub. 2 -ZrC-Zr composite body, by utilizing a post-treatment technique which may improve the oxidation resistance of the composite body. Moreover, the invention relates to novel products made according to the process. The novel process modifies at least a portion of a composite body by exposing said body to a source of second metal.

US Patent:

50047140, Apr 2, 1991

Filed:

Jan 13, 1989

Appl. No.:

7/296966

Inventors:

Terry D. Claar - Newark DE
William B. Johnson - Newark DE
Robert A. Rapp - Columbus OH

Assignee:

Lanxide Technology Company, LP - Newark DE

International Classification:

C04B 3510

US Classification:

501134

Abstract:

The present invention relates to a novel method of manufacturing a composite body, such as a ZrB. sub. 2 --ZrC--Z composite body, by utilizing a post-treatment technique. Moreover, the invention relates to novel products made according to the process. The novel process modifies at least a portion of a composite body by exposing said body to a source of second metal.

US Patent:

44682999, Aug 28, 1984

Filed:

Dec 20, 1982

Appl. No.:

6/451071

Inventors:

Stephen C. Byrne - Monroeville PA
Siba P. Ray - Pittsburgh PA
Robert A. Rapp - Columbus OH

Assignee:

Aluminum Company of America - Pittsburgh PA

International Classification:

C25C 300
C25C 304
C25C 326
C25C 312

US Classification:

204 60

Abstract:

A nonconsumable electrode assembly suitable for use in the production of metal by electrolytic reduction of a metal compound dissolved in a molten salt, the assembly comprising a metal conductor and a ceramic electrode body connected by a friction weld between a portion of the body having a level of free metal or metal alloy sufficient to effect such a friction weld and a portion of the metal conductor.

US Patent:

44552114, Jun 19, 1984

Filed:

Apr 11, 1983

Appl. No.:

6/483693

Inventors:

Siba P. Ray - Pittsburgh PA
Robert A. Rapp - Columbus OH

Assignee:

Aluminum Company of America - Pittsburgh PA

International Classification:

C25C 300
C25B 1104

US Classification:

204293

Abstract:

An inert electrode composition suitable for use in the production of metal by the electrolytic reduction of a metal compound dissolved in a molten salt is disclosed. The composition is formulated from a body containing metals and metal compounds designed to undergo displacement reaction upon sintering to form an interwoven network. The body also contains at least one non-reactive material, e. g. , metal compound or metal. The interwoven network contains at least a metal compound and a second material, both resulting from the displacement reaction, the second material selected from the group consisting of free metal and a metal alloy or a mixture thereof.

US Patent:

52759822, Jan 4, 1994

Filed:

Sep 21, 1992

Appl. No.:

7/948188

Inventors:

Terry D. Claar - Newark DE
William B. Johnson - Newark DE
Robert A. Rapp - Columbus OH

Assignee:

Lanxide Technology Company, LP - Newark DE

International Classification:

C04B 3510

US Classification:

501 87

Abstract:

The present invention relates to a novel method of manufacturing a composite body, such as a ZrB. sub. 2 --ZrC--Zr composite body, by utilizing a post-treatment technique which may improve the oxidation resistance of the composite body. Moreover, the invention relates to novel products made according to the process. The novel process modifies at least a portion of a composite body by exposing said body to a source of second metal.

US Patent:

45841721, Apr 22, 1986

Filed:

May 3, 1984

Appl. No.:

6/596020

Inventors:

Siba P. Ray - Pittsburgh PA
Robert A. Rapp - Columbus OH

Assignee:

Aluminum Company of America - Pittsburgh PA

International Classification:

B22F 316
C22C 3808

US Classification:

419 34

Abstract:

An improved inert electrode composition is suitable for use as an inert electrode in the production of metals such as aluminum by the electrolytic reduction of metal oxide or metal salt dissolved in a molten salt bath. The composition comprises one or more metals or metal alloys and metal compounds which may include oxides of the metals comprising the alloy. The alloy and metal compounds are interwoven in a network which provides improved electrical conductivity and mechanical strength while preserving the level of chemical inertness necessary for such an electrode to function satisfactorily.