Roger Keith Perkins

Author:

Roger Perkins

ISBN #:

0859372715

Author:

Roger Perkins

ISBN #:

0950642932

US Patent:

49370421, Jun 26, 1990

Filed:

Mar 23, 1989

Appl. No.:

7/327865

Inventors:

Roger J. Perkins - Evendale OH
Murray S. Smith - Green Hills OH

Assignee:

General Electric Company - Cincinnati OH

International Classification:

B22F 700

US Classification:

419 8

Abstract:

A mixture of two powdered alloys of the M, Cr, Al type, M being Co and/or Ni, is disclosed, in one form, for use in providing an abradable surface of an article and is characterized by the substantial absence of B. The first alloy has substantially no Si and has a higher melting range than that of the second alloy. The second alloy has substantially no Y and consists essentially of, by weight, 8-12% Si, 1. 5-4% Al, 10-30%Cr, with the balance M and incidental impurities. The total mixture composition consists essentially of, by weight, 10-35% Cr, 4-10% Al, from a small but effective amount up to about 0. 09% Y, 2-6% Si, with the balance M and incidental impurities.

US Patent:

48429538, Jun 27, 1989

Filed:

Nov 28, 1986

Appl. No.:

6/935997

Inventors:

Roger J. Perkins - Evendale OH
Murray S. Smith - Green Hills OH

Assignee:

General Electric Company - Cincinnati OH

International Classification:

C22C 1905
C22C 1907

US Classification:

428553

Abstract:

A mixture of two powdered alloys of the M, Cr, Al type, M being Co and/or Ni, is disclosed, in one form, for use in providing an abradable surface of an article and is characterized by the substantial absence of B. The first alloy has substantially no Si and has a higher melting range than that of the second alloy. The second alloy has substantially no Y and consists essentially of, by weight, 8-12% Si, 1. 5-4% Al, 10-30% Cr, with the balance M and incidiental impurities. The total mixture composition consists essentially of, by weight, 10-35% Cr, 4-10% Al, from a small but effective amount up to about 0. 09% Y, 2-6% Si, with the balance M and incidental impurities.

US Patent:

57833150, Jul 21, 1998

Filed:

Mar 10, 1997

Appl. No.:

8/814128

Inventors:

Jon C. Schaeffer - Milford OH
Russell L. McCarron - Cincinnati OH
Gerald H. Meier - Pittsburgh PA
Roger A. Perkins - Weed CA
Joseph F. Cullinan - San Francisco CA

Assignee:

General Electric Company - Cincinnati OH

International Classification:

B32B 1500
B32B 1520

US Classification:

428633

Abstract:

An article having a protective coating thereon includes a substrate having a substrate composition and a substrate surface, and a protective coating contacting and overlying at least a portion of the substrate surface. The substrate is preferably a Ti--Nb aluminide, an. alpha. 2-titanium aluiminide, or a. gamma. -titanium aluminide. The protective coating includes a metallic layer contacting the substrate surface and having a composition, in atomic percent, of from about 5 to about 40 percent chromium, from about 44 to about 59 percent aluminum, balance titanium plus incidental impurities. The protective coating may further include a ceramic layer contacting and overlying the metallic layer, with the metallic layer lying between the ceramic layer and the substrate.

US Patent:

44786387, Oct 23, 1984

Filed:

Sep 28, 1983

Appl. No.:

6/536233

Inventors:

Murray S. Smith - Cincinnati OH
Roger J. Perkins - Evendale OH
Robert E. Fryxell - Cincinnati OH
William R. Young - Cincinnati OH

Assignee:

General Electric Company - Cincinnati OH

International Classification:

B23P 604
B23K 104
B22F 702

US Classification:

75255

Abstract:

A powder mixture for use in a method of repairing a superalloy article includes first and second Ni base superalloy powders. The first powder, characterized by superior hot corrosive resistance along with good oxidation resistance and the substantial absence of melting point depressants selected from Si and B greater than normal impurity levels, is included in the range of 30-70 wt % of the mixture. The second powder has a composition substantially within the same composition range as that of the first powder with the inclusion, by wt, of 0. 5-5% B and up to 6% Si.