Study of the Radiative Properties of Heat Resisting Metals and Alloys. I.--Optical Constants and Emissivities of Nickel, Cobalt and Chromium

Infrared reflectivities and emissivities of Ni, Co, and Cr are measured at high temperatures. Cobalt is found to have a remarkable hysteresis of emissivity around the martensitic transformation temperature. An optical dispersion equation is applied to describe the spectral characteristics of interba...

Full description

Saved in:
Bibliographic Details
Published in:Bulletin of the JSME 1982-05, Vol.25 (203), p.804-811
Main Authors: Makino, T, Kawasaki, H, Kunitomo, T
Format: Article
Language:English
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Infrared reflectivities and emissivities of Ni, Co, and Cr are measured at high temperatures. Cobalt is found to have a remarkable hysteresis of emissivity around the martensitic transformation temperature. An optical dispersion equation is applied to describe the spectral characteristics of interband transitions and conduction absorption of electrons of these three metals. Quantitative expressions for the parameters in the equation are obtained for temperatures up to 1700, 1400 and 1000K for nickel, cobalt and chromium, respectively. Spectral and total emissivities are calculated as functions of temperature and crystal phase. 19 ref.--AA
ISSN:0021-3764