Research and Development on Advanced Graphite Materials Volume XXXIV. Oxidation-Resistant Coatings for Graphite

Item

Title
Research and Development on Advanced Graphite Materials Volume XXXIV. Oxidation-Resistant Coatings for Graphite
Date
1964
Index Abstract
Contrails only
Photo Quality
Incomplete
Report Number
WADD TR 61-72 Volume 34
Creator
Schulz, D. A.
Higgs, P. H.
Cannon, J. D.
Corporate Author
Union Carbide Corpotation
Laboratory
Air Force Materials Laboratory
Extent
102
Identifier
ADA284629
ADA284629
Access Rights
OTS
Distribution Classification
1
Contract
AF 33(616)-6915
DoD Project
7350
DoD Task
735002
DTIC Record Exists
Yes
Report Availability
Full text available by request
Date Issued
1964-07
Abstract
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.
Publisher
Wright-Patterson Air Force Base, OH : Air Force Materials Laboratory, Research and Technology Division, Air Force Systems Command
Distribution Conflict
No
Provenance
Bearcat
Type
report
Subject
Refractory Materials
Graphite
Coatings
Oxides
Oxidation Resistance
Magnesium
Calcium
Stability
Silicon
Barriers
Titanium
Arc Spraying
Thorium
Borides
Plasma Spraying
Melting Point
Strontium
Thermodynamic Properties
Diffusion
Zirconium
Chemical Reactions
Carbides
Nitrides
Vapor Deposition
Composite Materials
High Temperature