Patents by Inventor Abdus Suttar Khan

Patent number: 7851027
Abstract: It is disclosed a method of depositing a seal coating and a seal system comprising at least two layers on the surface of an article. The upper or surface layer has a higher chromium activity than a bottom layer, to reduce a diffusion of cobalt and the formation of cobalt oxide is reduced. The coating of invention may be heat-treated to reduce or optimize the formation of cobalt oxide to sustain the wear property.
Type: Grant
Filed: October 7, 2008
Issued: December 14, 2010
Assignee: Alstom Technology Ltd
Inventors: Abdus Suttar Khan, Ian William Boston, James Alexander Hearley
Application number: 20100047460
Abstract: It is disclosed a method of depositing a seal coating and a seal system comprising at least two layers on the surface of an article. The upper or surface layer has a higher chromium activity than a bottom layer, to reduce a diffusion of cobalt and the formation of cobalt oxide is reduced. The coating of invention may be heat-treated to reduce or optimize the formation of cobalt oxide to sustain the wear property.
Type: Application
Filed: October 7, 2008
Issued: February 25, 2010
Assignee: ALSTOM Technology Ltd.
Inventors: Abdus Suttar Khan, Ian William Boston, James Alexander Hearley
Patent number: 7445854
Abstract: It is disclosed a method of deposting a seal coating and a seal system comprising at least two layers on the surface of an article. The upper or surface layer has a higher chromium activity than a bottom layer to reduce a diffusion of cobalt and the formation of cobalt oxide is reduced. The coating of invention may be heat-treated to reduce or optimize the formation of cobalt oxide to sustin the wear property.
Type: Grant
Filed: March 15, 2004
Issued: November 4, 2008
Assignee: ALSTOM Technology Ltd
Inventors: Abdus Suttar Khan, Ian William Boston, James Alexander Hearley
Patent number: 7264887
Abstract: A method of depositing a bond coating to a surface of an article includes the steps of depositing an inner layer of the bond coating consisting of ?-NiAl comprising Fe, Ga, Mo, B, Hf or Zr or ?/?-MCrAlY comprising Fe, Ga, Mo, B, Hf or Zr or ?/??- or ?-MCrAlY, and depositing an outer layer of the bond coating, which is more coarse the in the inner layer, consisting of ?-NiAl comprising Fe, Ga, Mo, B, Hf or Zr or ?/?-MCrAlY comprising Fe, Ga, Mo, B, Hf or Zr or ?/??- or ?-MCrAlY, wherein said elements Fe, Ga, Mo, B, Hf or Zr above mentioned are present individually or in combination. The coating also includes a noble metal selected from the group consisting of platinum, palladium and rhodium in the inner and outer layer or as a separate layer.
Type: Grant
Filed: July 8, 2004
Issued: September 4, 2007
Assignee: Alstom Technology Ltd.
Inventors: Abdus Suttar Khan, Mohamed Nazmy
Patent number: 7094475
Abstract: A gas turbine component consists of a superalloy base material with a single crystal structure and a protective MCrAlY-coating (6). The MCrAlY-coating (6) has a g/g? single crystal structure, which is epitaxial with the base material. It has be determined the critical factors for the successful epitaxial and crack-free growth of the MCrAlY-coating (6).
Type: Grant
Filed: September 6, 2002
Issued: August 22, 2006
Assignee: Alstom Technology LTD
Inventors: Alexander Schnell, Cyrille Bezencon, Matthias Hoebel, Abdus Suttar Khan, Maxim Konter, Wilfried Kurz
Patent number: 7014923
Abstract: A gas turbine component consists of a superalloy base material with a single crystal structure and a protective MCrAlY-coating. The MCrAlY-coating the MCrAlY has a ?/?-phase and single crystal structure, which is epitaxial with the base material.
Type: Grant
Filed: September 6, 2002
Issued: March 21, 2006
Assignee: Alstom Technology LTD
Inventors: Alexander Schnell, Cyrille Bezencon, Matthias Hoebel, Abdus Suttar Khan, Maxim Konter, Wilfried Kurz
Application number: 20040244676
Abstract: A gas turbine component consists of a superalloy base material with a single crystal structure and a protective MCrAlY-coating. The MCrAlY-coating the MCrAlY has a &ggr;/&bgr;-phase and single crystal structure, which is epitaxial with the base material.
Type: Application
Filed: March 22, 2004
Issued: December 9, 2004
Inventors: Alexander Schnell, Cyrille Bezencon, Matthias Hoebel, Abdus Suttar Khan, Maxim Konter, Wilfried Kurz
Application number: 20040234808
Abstract: A gas turbine component consists of a superalloy base material with a single crystal structure and a protective MCrAlY-coating (6). The MCrAlY-coating (6) has a g/g′ single crystal structure, which is epitaxial with the base material. It has be determined the critical factors for the successful epitaxial and crack-free growth of the MCrAlY-coating (6).
Type: Application
Filed: March 19, 2004
Issued: November 25, 2004
Inventors: Alexander Schnell, Cyrille Bezencon, Matthias Hoebel, Abdus Suttar Khan, Maxim Konter, Wilfried Kurz
Application number: 20040185294
Abstract: It is disclosed a method of deposting a seal coating and a seal system comprising at least two layers (3, 4) on the surface of an article (1). The upper or surface layer (4) has a higher chromium activity than a bottom layer (3) to reduce a diffusion of cobalt and the formation of cobalt oxide is reduced. The coating (2) of invention may be heat-treated to reduce or optimize the formation of cobalt oxide to sustin the wear property.
Type: Application
Filed: March 15, 2004
Issued: September 23, 2004
Assignee: ALSTOM Technology Ltd
Inventors: Abdus Suttar Khan, Ian William Boston, James Alexander Hearley
Application number: 20040163583
Abstract: It is disclosed a method of depositing a MCrAlY-coating (6) on the surface (5) of a single crystal (SX) or directionally solidified (DS) article (1). In a first step the article (1) is coated only at a local area by an electroplated method. In a second step the deposited MCrAlY-coating in single crystal form epitaxial with the base material of the article.
Type: Application
Filed: December 4, 2003
Issued: August 26, 2004
Assignee: ALSTOM Technology Ltd.
Inventors: Abdus Suttar Khan, Thomas Duda, Matthias Hoebel, Alexander Schnell
Application number: 20040159552
Abstract: It is disclosed a method of depositing a MCrAlY-coating (6) on the surface (5) of a single crystal (SX) or directionally solidified (DS) article (1), wherein the article (1) is coated only at a local area by an electroplated method.
Type: Application
Filed: December 4, 2003
Issued: August 19, 2004
Assignee: ALSTOM Technology Ltd.
Inventors: Abdus Suttar Khan, Thomas Duda
Application number: 20040079648
Abstract: A method of depositing a layer (6) of highly oxidation and fatigue resistant MCrAlY-coating by an electroplated process has been described. A relative thin coating on an industrial gas turbine component was applied with a thickness control of ±20 &mgr;m of the thickness of the applied layer (6) on gas turbine articles (1). The said MCrAlY coatings comprise an addition of (wt.-%) 0.01 to 3% Fe. In addition to Fe the MCrAlY coatings may contain 0.5-2.5% Si, 0-1.5% Hf, 0.01-0.2% Zr and 0-2% Ta, alone or in combination.
Type: Application
Filed: October 15, 2003
Issued: April 29, 2004
Assignee: ALSTOM (Switzerland) LTD.
Inventors: Abdus Suttar Khan, Hans-Peter Bossmann, Thomas Duda, Alexander Schnell, Karl-Johan Stefansson, Christoph Toennes