EXPERIMENTAL STUDY OF FACTORS CONTROLLING THE EFFECTIVENESS OF HIGH- TEMPERATURE PROTECTIVE COATINGS FOR TUNGSTEN. Quarterly Progress Report No. 3, November 15, 1962-February 15, 1963

Technical Report · Fri Mar 15 04:00:00 EST 1963

OSTI ID:4701830

Dickinson, C D; Seigle, L L

Processes governing the efficacy of high-temperature protective coatings for W, interdiffusion in ternary oxygenmetal-metal systems and breakaway during oxide film growth, are investigated to determine the oxidation behavior of binary alloys and the influence of substrate mechanical properties on the growth characteristics of the oxide films. Experimemits on oxidation kinetics and the microstructural and quantitative identification of the layers formed were conducted on seven systems. Experiments on the effect of N/sub 2/ on the diffusion processes that govern the growth of oxides in the Zr--Th-0 system are described. The results obtained in the W--Rf --0, W-Hf--Re--O, Zr-N-O, and ZrN-- ThN-O systems and the Sn--Al--Cr and Sn--Al-La systems are given. Preliminary experiments on the Zr--Y--O and Hf-Y--O systems are described. (auth)

• Research Organization: General Telephone and Electrics Labs. Inc., Bayside, N.Y.
• NSA Number: NSA-17-030937
• OSTI ID: 4701830
• Report Number(s): NP-12968; TR-63-461.10
• Country of Publication: United States
• Language: English

Related Subjects

ALUMINUM
CHROMIUM
COATING
DIFFUSION
FILMS
HAFNIUM
HIGH TEMPERATURE
LANTHANUM
METALS, CERAMICS, AND OTHER MATERIALS
NITROGEN
OXIDATION
OXIDES
OXYGEN
REACTION KINETICS
REPORT
RHENIUM
SAFETY
THORIUM
THORIUM NITRIDES
TIN
TUNGSTEN
YTTRIUM
ZIRCONIUM
ZIRCONIUM NITRIDES