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Title
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Research and Development on Advanced Graphite Materials Volume XXXIV. Oxidation-Resistant Coatings for Graphite
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Date
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1964
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Index Abstract
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Contrails only
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Photo Quality
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Incomplete
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Report Number
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WADD TR 61-72 Volume 34
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Creator
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Schulz, D. A.
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Higgs, P. H.
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Cannon, J. D.
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Corporate Author
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Union Carbide Corpotation
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Laboratory
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Air Force Materials Laboratory
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Extent
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102
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Identifier
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ADA284629
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ADA284629
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Access Rights
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OTS
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Distribution Classification
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1
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Contract
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AF 33(616)-6915
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DoD Project
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7350
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DoD Task
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735002
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DTIC Record Exists
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Yes
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Report Availability
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Full text available by request
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Date Issued
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1964-07
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Abstract
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The refractory materials that could be used for high-temperature, oxidation-resistant coatings for graphite are reviewed. A study of these materials shows which are thermodynamically stable when applied directly to graphite and those which are thermodynamically stable when and intermediate coating is applied between an oxidation-resistant outer coating and the graphite. Calculation are made showing that, with properly selected intermediate reaction barriers, many very refractory oxides, such as thoria, can be used as coatings at temperatures up to their melting points.
The application of TiB2, B6Si, MgO ZrO2, CaZrO3 and SrZrO3 coatings by arc-plasma spraying is described and the results of oxidation studies to determine the protection afforded graphite by these coatings are presented. Coating of TiC-TiN and SiC-Si applied to graphite by vapor deposition using the source-target method are discussed. Techniques of applying SiC coatings by pack-diffusion methods are reported and the oxidation protection afforded by the coatings is compared with that of the SiC produced by the source-target method.
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Publisher
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Wright-Patterson Air Force Base, OH : Air Force Materials Laboratory, Research and Technology Division, Air Force Systems Command
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Distribution Conflict
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No
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Provenance
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Bearcat
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Type
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report
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Subject
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Refractory Materials
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Graphite
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Coatings
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Oxides
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Oxidation Resistance
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Magnesium
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Calcium
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Stability
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Silicon
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Barriers
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Titanium
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Arc Spraying
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Thorium
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Borides
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Plasma Spraying
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Melting Point
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Strontium
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Thermodynamic Properties
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Diffusion
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Zirconium
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Chemical Reactions
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Carbides
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Nitrides
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Vapor Deposition
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Composite Materials
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High Temperature