Construction of a dilatometer for use in ultra-low pressure environments
Abstract
A dilatometer capable of functioning at pressures as low as four one-billionths of a torr with temperatures of 1000 C is described, and applications of the device to the study of metallurgical processes are mentioned. The direct-type dilatometer and its associated thermal regulation scheme are described. For phenomena of very low amplitude, i.e., less than 0.01 mm, it was found that a dilatometer amplification power of 12,500 gave good results; amplification powers as high as 25,000 are obtainable with the device. Studies of the phase transitions of high-purity metals and alloys which are extremely reactive in the presence of oxygen are reported.
- Publication:
-
Memoires Scientifiques de la Revue de Metallurgie
- Pub Date:
- August 1977
- Bibcode:
- 1977MeSRM..74..469E
- Keywords:
-
- Dilatometry;
- Extensometers;
- Ultrahigh Vacuum;
- Vacuum Tests;
- Binary Alloys;
- Phase Transformations;
- Thermoregulation;
- Titanium;
- Transition Temperature;
- Instrumentation and Photography