Accession Number:

ADA158684

Title:

Precision Interferometric Dilatometer

Descriptive Note:

Technical rept.

Corporate Author:

AEROSPACE CORP EL SEGUNDO CA MATERIALS SCIENCES LAB

Personal Author(s):

Report Date:

1985-08-12

Pagination or Media Count:

34.0

Abstract:

An improved double Michelson laser interferometric dilatometer with an inexpensive automatic signal processor is described. The unit is suitable for studying materials having near-zero coefficients of thermal expansion CTE ranging from 100 to 450 K. Delta LL values to a resolution of less than 10 to the minus 7th power and instantaneous CTE values to less than 10 to the minus 8th power per K can be plotted in real time at regular intervals 30 s to give time-related absolute expansion data of noncontacted samples of arbitrary shape or size. Keywords Dilatometry Michelson interferometry Signal processing Thermal expansion.

Subject Categories:

  • Test Facilities, Equipment and Methods
  • Optics
  • Thermodynamics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE