Ni-base superalloy powder-processed porous layer for gas cooling in extreme environments

White, Emma M. H.; Heidloff, Andrew J.; Byrd, David J.; Anderson, Ross D.; Anderson, Iver E.

doi:10.1080/00325899.2015.1138022

Title: Ni-base superalloy powder-processed porous layer for gas cooling in extreme environments

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Abstract

Extreme high temperature conditions demand novel solutions for hot gas filters and coolant access architectures, i.e., porous layers on exposed components. These high temperatures, for example in current turbine engines, are at or exceeding current material limits for high temperature oxidation/corrosion, creep resistance, and, even, melting temperature. Thus novel blade designs allowing greater heat removal are required to maintain airfoil temperatures below melting and/ or rapid creep deformation limits. Gas atomized Ni-base superalloy powders were partially sintered into porous layers to allow full-surface, transpirational cooling of the surface of airfoils. Furthermore, these powder-processed porous layers were fully characterized for surface, morphology, cross-sectional microstructure, and mechanical strength characteristics. A sintering model based on pure Ni surface diffusion correlated well with the experimental results and allowed reasonable control over the partial sintering process to obtain a specified level of porosity within the porous layer.

Authors:

White, Emma M. H. ^[1]; Heidloff, Andrew J. ^[1]; Byrd, David J. ^[1]; Anderson, Ross D. ^[1]; Anderson, Iver E. ^[1]

Ames Lab., Ames, IA (United States)

Publication Date:: 2016-05-26

Research Org.:: Ames Lab., Ames, IA (United States)

Sponsoring Org.:: USDOE

OSTI Identifier:: 1278742

Report Number(s):: IS-J-8808
Journal ID: ISSN 0032-5899

Grant/Contract Number:: AC02-07CH11358; FWP-2012.03.02; FE-0004000.3.622.053.001

Resource Type:: Accepted Manuscript

Journal Name:: Powder Metallurgy

Additional Journal Information:: Journal Volume: 59; Journal Issue: 3; Journal ID: ISSN 0032-5899

Publisher:: Taylor & Francis

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; gas atomization; powder processing; sintering; controlled porosity; Ni-base superalloy

Citation Formats


                    White, Emma M. H., Heidloff, Andrew J., Byrd, David J., Anderson, Ross D., and Anderson, Iver E.. Ni-base superalloy powder-processed porous layer for gas cooling in extreme environments.  United States: N. p., 2016. 
Web.  doi:10.1080/00325899.2015.1138022.

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                    White, Emma M. H., Heidloff, Andrew J., Byrd, David J., Anderson, Ross D., & Anderson, Iver E.. Ni-base superalloy powder-processed porous layer for gas cooling in extreme environments.  United States.  https://doi.org/10.1080/00325899.2015.1138022

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                    White, Emma M. H., Heidloff, Andrew J., Byrd, David J., Anderson, Ross D., and Anderson, Iver E.. Thu .  
"Ni-base superalloy powder-processed porous layer for gas cooling in extreme environments".  United States.  https://doi.org/10.1080/00325899.2015.1138022.  https://www.osti.gov/servlets/purl/1278742.

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@article{osti_1278742,

  title        = {Ni-base superalloy powder-processed porous layer for gas cooling in extreme environments},

  author       = {White, Emma M. H. and Heidloff, Andrew J. and Byrd, David J. and Anderson, Ross D. and Anderson, Iver E.},

  abstractNote = {Extreme high temperature conditions demand novel solutions for hot gas filters and coolant access architectures, i.e., porous layers on exposed components. These high temperatures, for example in current turbine engines, are at or exceeding current material limits for high temperature oxidation/corrosion, creep resistance, and, even, melting temperature. Thus novel blade designs allowing greater heat removal are required to maintain airfoil temperatures below melting and/ or rapid creep deformation limits. Gas atomized Ni-base superalloy powders were partially sintered into porous layers to allow full-surface, transpirational cooling of the surface of airfoils. Furthermore, these powder-processed porous layers were fully characterized for surface, morphology, cross-sectional microstructure, and mechanical strength characteristics. A sintering model based on pure Ni surface diffusion correlated well with the experimental results and allowed reasonable control over the partial sintering process to obtain a specified level of porosity within the porous layer.},

  doi          = {10.1080/00325899.2015.1138022},

  journal      = {Powder Metallurgy},

  number       = 3,

  volume       = 59,

  place        = {United States},

  year         = {2016},

  month        = {5}

}

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