Patents by Inventor Narayana Sastry Cheruvu

Narayana Sastry Cheruvu has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 9511572
    Abstract: A coated substrate including a substrate having a surface, a bond coat proximate to the substrate surface, a yttrium stabilized zirconia (YSZ) thermal barrier layer opposite the substrate surface, and at least one interlayer disposed between the bond coat and the thermal barrier layer, wherein the interlayer contains an alloy having a nanocrystalline grain structure. A method for coating a substrate to be exposed to high in service temperatures and/or temperature cycles including depositing a bond coating on substrate surface, depositing at least one nanocrystalline interlayer on the bond coat opposite the substrate surface, and depositing a yttrium stabilized zirconia (YSZ) thermal barrier coating on the nanocrystalline interlayer opposite the bond coat, wherein the service life of the YSZ thermal barrier coating is extended relative to a substrate coated with the bond coating and the thermal barrier without the interlayer disposed therebetween.
    Type: Grant
    Filed: May 4, 2012
    Date of Patent: December 6, 2016
    Assignee: SOUTHWEST RESEARCH INSTITUTE
    Inventors: Narayana Sastry Cheruvu, Ronghua Wei
  • Publication number: 20130122317
    Abstract: A coated substrate including a substrate having a surface, a bond coat proximate to the substrate surface, a yttrium stabilized zirconia (YSZ) thermal barrier layer opposite the substrate surface, and at least one interlayer disposed between the bond coat and the thermal barrier layer, wherein the interlayer contains an alloy having a nanocrystalline grain structure. A method for coating a substrate to be exposed to high in service temperatures and/or temperature cycles including depositing a bond coating on substrate surface, depositing at least one nanocrystalline interlayer on the bond coat opposite the substrate surface, and depositing a yttrium stabilized zirconia (YSZ) thermal barrier coating on the nanocrystalline interlayer opposite the bond coat, wherein the service life of the YSZ thermal barrier coating is extended relative to a substrate coated with the bond coating and the thermal barrier without the interlayer disposed therebetween.
    Type: Application
    Filed: May 4, 2012
    Publication date: May 16, 2013
    Applicant: Electric Power Research Institute, Inc.
    Inventors: Narayana Sastry CHERUVU, Ronghua WEI
  • Patent number: 8230797
    Abstract: The present invention relates to corrosion resistance coatings suitable for elevated temperature applications, which employ compositions of iron (Fe), chromium (Cr), nickel (Ni) and/or aluminum (Al). The compositions may be configured to regulate the diffusion of metals between a coating and a substrate, which may then influence coating performance, via the formation of an inter-diffusion barrier layer. The inter-diffusion barrier layer may comprise a face-centered cubic phase.
    Type: Grant
    Filed: December 1, 2008
    Date of Patent: July 31, 2012
    Assignee: Southwest Research Institute
    Inventors: Kwai S. Chan, Narayana Sastry Cheruvu, Wuwei Liang
  • Publication number: 20100132598
    Abstract: The present invention relates to corrosion resistance coatings suitable for elevated temperature applications, which employ compositions of iron (Fe), chromium (Cr), nickel (Ni) and/or aluminum (Al). The compositions may be configured to regulate the diffusion of metals between a coating and a substrate, which may then influence coating performance, via the formation of an inter-diffusion barrier layer. The inter-diffusion barrier layer may comprise a face-centered cubic phase.
    Type: Application
    Filed: December 1, 2008
    Publication date: June 3, 2010
    Applicant: SOUTHWEST RESEARCH INSTITUTE
    Inventors: Kwai S. CHAN, Narayana Sastry CHERUVU, Wuwei LIANG