Accession Number:

AD0750192

Title:

Highly Stable Nickel-Base Alloys for Thermocouples,

Descriptive Note:

Corporate Author:

DEFENCE STANDARDS LABS MARIBYRNONG (AUSTRALIA)

Personal Author(s):

Report Date:

1971-11-04

Pagination or Media Count:

13.0

Abstract:

The long-term thermal emf drifts are related to the depletion of reactive solutes by oxidation, and the short-term changes to short-range ordering. It is shown that the environmental stability of nickel-base thermocouple alloys can be significantly enhanced by increasing solute levels above those required to cause a transition from internal to external modes of oxidation, andor by selecting solutes which preferentially oxidize to form impervious diffusion barrier films. Author

Subject Categories:

  • Properties of Metals and Alloys
  • Test Facilities, Equipment and Methods

Distribution Statement:

APPROVED FOR PUBLIC RELEASE