Effect of 0. 1 at. % zirconium on the cyclic oxidation resistance of. beta. -NiAl

Barrett, C A

doi:10.1007/BF00659006

Title: Effect of 0. 1 at. % zirconium on the cyclic oxidation resistance of. beta. -NiAl

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Abstract

The effect of 0.1 at.% Zr(0.2 wt. % Zr) on the cyclic oxidation of hipped ..beta..-NiAl was studied. Oxidation testing was performed in static air at 1100-1200/sup 0/C, using 1-hr exposure cycles for test times up to 3000 hr. The weight change versus time data were modeled with the COSP computer program to analyze and predict cyclic-oxidation behavior. Zr additions significantly change the nature of the scale-spalling process during cooling so that the oxide spalls near the oxide-air interface at a relatively low depth within the scale. Without Zr, the predominantly ..cap alpha..-Al/sub 2/O/sub 3/ scale tends to spall randomly to bare metal at relatively high effective-scale-loss rates, particularly at 1150/sup 0/C and 1200/sup 0/C. This leads to higher rates of Al consumption for the Zr-free aluminide and much earlier depletion of al, leading to eventual breakaway (i.e., failure).

Authors:: Barrett, C A

Publication Date:: Thu Dec 01 00:00:00 EST 1988

Research Org.:: National Aeronautics and Space Administration, Cleveland, OH (USA)

OSTI Identifier:: 6369099

Resource Type:: Journal Article

Journal Name:: Oxid. Met.; (United States)

Additional Journal Information:: Journal Volume: 30:5-6

Country of Publication:: United States

Language:: English

Subject:: 36 MATERIALS SCIENCE; ALUMINIUM ALLOYS; OXIDATION; NICKEL ALLOYS; PROTECTIVE COATINGS; CORROSION RESISTANCE; ZIRCONIUM ADDITIONS; METALLURGICAL EFFECTS; C CODES; COMPUTERIZED SIMULATION; CORROSION PROTECTION; DESCALING; ELECTRON MICROPROBE ANALYSIS; HEAT RESISTING ALLOYS; MATERIALS TESTING; METALLOGRAPHY; SCALING; SCANNING ELECTRON MICROSCOPY; THERMAL CYCLING; TIME DEPENDENCE; WEIGHT MEASUREMENT; X-RAY DIFFRACTION; ALLOYS; CHEMICAL ANALYSIS; CHEMICAL REACTIONS; COATINGS; COHERENT SCATTERING; COMPUTER CODES; DIFFRACTION; ELECTRON MICROSCOPY; HEAT RESISTANT MATERIALS; MATERIALS; MICROANALYSIS; MICROSCOPY; SCATTERING; SIMULATION; SURFACE FINISHING; TESTING; ZIRCONIUM ALLOYS; 360105* - Metals & Alloys- Corrosion & Erosion; 360102 - Metals & Alloys- Structure & Phase Studies

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                    Barrett, C A. Effect of 0. 1 at. % zirconium on the cyclic oxidation resistance of. beta. -NiAl.  United States: N. p., 1988. 
        Web.  doi:10.1007/BF00659006.

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                    Barrett, C A. Effect of 0. 1 at. % zirconium on the cyclic oxidation resistance of. beta. -NiAl.  United States.  https://doi.org/10.1007/BF00659006

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                    Barrett, C A. 1988.  
        "Effect of 0. 1 at. % zirconium on the cyclic oxidation resistance of. beta. -NiAl".  United States.  https://doi.org/10.1007/BF00659006.

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@article{osti_6369099,

  title        = {Effect of 0. 1 at. % zirconium on the cyclic oxidation resistance of. beta. -NiAl},

  author       = {Barrett, C A},

  abstractNote = {The effect of 0.1 at.% Zr(0.2 wt. % Zr) on the cyclic oxidation of hipped ..beta..-NiAl was studied. Oxidation testing was performed in static air at 1100-1200/sup 0/C, using 1-hr exposure cycles for test times up to 3000 hr. The weight change versus time data were modeled with the COSP computer program to analyze and predict cyclic-oxidation behavior. Zr additions significantly change the nature of the scale-spalling process during cooling so that the oxide spalls near the oxide-air interface at a relatively low depth within the scale. Without Zr, the predominantly ..cap alpha..-Al/sub 2/O/sub 3/ scale tends to spall randomly to bare metal at relatively high effective-scale-loss rates, particularly at 1150/sup 0/C and 1200/sup 0/C. This leads to higher rates of Al consumption for the Zr-free aluminide and much earlier depletion of al, leading to eventual breakaway (i.e., failure).},

  doi          = {10.1007/BF00659006},

  url          = {https://www.osti.gov/biblio/6369099},
  journal      = {Oxid. Met.; (United States)},
number       = ,

  volume       = 30:5-6,

  place        = {United States},

  year         = {Thu Dec 01 00:00:00 EST 1988},

  month        = {Thu Dec 01 00:00:00 EST 1988}

}

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