EXPERIMENTAL STUDY OF FACTORS CONTROLLING THE EFFECTIVENESS OF HIGH- TEMPERATURE PROTECTIVE COATINGS FOR TUNGSTEN. Quarterly Progress Report No. 2, August 15-November 15, 1962

Technical Report · Sat Dec 15 04:00:00 EST 1962

OSTI ID:4749226

Nicholas, M G; Dickinson, C D; Seigle, L L

Two processes governing the efficiency of high-temperature protective coatings for tungsten, interdiffusion in ternary oxygen-metal-metal systems and breakaway during oxide film growth, are being investigated experimentally to determine the oxidation behavior of binary alloys and the influence of substrate mechanical properties on the growth characteristics of the oxide films. Experiments involving oxidation kinetics and the microstructural and quantitative identification of the layers formed have been conducted on four systems. An analysis of the diffusion processes governing growth in the Zr-Th-O system is presented, and a preliminary discussion of the results obtained in the W-Hf-O, ZrN-ThN-O, and Sn-Al-Cr systems is given. (auth)

• Research Organization: General Telephone and Electronics Labs. Inc., Bayside, N.Y.; Battelle Memorial Inst., Columbus, Ohio
• NSA Number: NSA-17-014836
• OSTI ID: 4749226
• Report Number(s): NP-12592; TR-62-461.7
• Country of Publication: United States
• Language: English

Related Subjects

ALUMINUM ALLOYS
CHROMIUM ALLOYS
COATING
CORROSION PROTECTION
DIFFUSION
EFFICIENCY
EXPANSION
FILMS
HAFNIUM ALLOYS
HIGH TEMPERATURE
LAYERS
MECHANICAL PROPERTIES
METALLOGRAPHY
METALS, CERAMICS, AND OTHER MATERIALS
OXIDATION
OXIDES
PHASE DIAGRAMS
REACTION KINETICS
THORIUM ALLOYS
THORIUM NITRIDES
TIN ALLOYS
TUNGSTEN
TUNGSTEN ALLOYS
ZIRCONIUM ALLOYS
ZIRCONIUM NITRIDES