Accession Number:

AD0404906

Title:

EXPERIMENTAL STUDY OF FACTORS CONTROLLING THE EFFECTIVENESS OF HIGH- TEMPERATURE PROTECTIVE COATINGS FOR TUNGSTEN

Descriptive Note:

Quarterly progress rept. no. 2, 15 Aug-15 Nov 1962

Corporate Author:

GENERAL TELEPHONE AND ELECTRONICS LABS INC BAYSIDE NY BAYSIDE LAB

Report Date:

1962-12-15

Pagination or Media Count:

51.0

Abstract:

Two processes governing the efficacy 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 deter mine the oxidation behavior of binary alloys and the influence of substrate mechanical properties on the growth characteristics of the 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 pre sented, and a preliminary discussion of the re sults obtained in the W-Hf-O, ZrN-ThN-O and Sn Al-Cr systems is given.

Subject Categories:

  • Metallurgy and Metallography

Distribution Statement:

APPROVED FOR PUBLIC RELEASE