Application of laser polarimetry to the measurement of the specific heat capacity of molybdenum in the range 2000 to 2800 K by a pulse-heating technique

Measurement of the specific heat capacity of molybdenum (standard reference material) in the temperature range 2000 to 2800 K is described. The method is based on rapid resistive self-heating of a solid cylindrical specimen from room temperature to the maximum temperature of interest by the passage...

Full description

Saved in:
Bibliographic Details
Published in:International journal of thermophysics 1998-07, Vol.19 (4), p.1267-1276
Main Authors: CEZAIRLIYAN, A, KRISHNAN, S, BASAK, D, MCCLURE, J. L
Format: Article
Language:English
Subjects:
Applied sciences
Condensed matter: structure, mechanical and thermal properties
Electric resistance
Exact sciences and technology
Heat capacities of solids
High temperature effects
Instruments, apparatus, components and techniques common to several branches of physics and astronomy
Laser pulses
Metals. Metallurgy
Optical instruments, equipment and techniques
Physics
Polarimeters
Polarimeters and ellipsometers
Specific heat
Thermal properties of condensed matter
Thermal properties of crystalline solids
Thermal variables measurement
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Measurement of the specific heat capacity of molybdenum (standard reference material) in the temperature range 2000 to 2800 K is described. The method is based on rapid resistive self-heating of a solid cylindrical specimen from room temperature to the maximum temperature of interest by the passage of a sub-second-duration electrical current pulse through the specimen with simultaneous measurement of the pertinent experimental quantities. The experimental quantities yield: the current through the specimen, voltage drop across the specimen, and specimen temperature. The objective of this study is to demonstrate the feasibility of performing accurate thermophysical measurements where the specimen's true temperature is determined from measurements of surface radiance temperature with a pyrometer and normal spectral emissivity with a laser polarimeter. This approach of measuring true temperature eliminates the need of having a blackbody configuration for the specimen. In addition to the specific heat capacity, the normal spectral emissivity (at 633 nm) and electrical resistivity of molybdenum in the temperature range from 2000 to 2800 K are presented.
ISSN:0195-928X
1572-9567