Masters Theses

Abstract

"The thermal conductivity of materials is of considerable practical and theoretical interest. Numerous publications on this subject have been presented with widely varying approaches and applications being made. Perhaps for no other thermal property are the published results so widely divergent and subject to such great uncertainty, particularly at high temperatures. This is partly due to unsolved difficulties in measurement, but perhaps to an even greater extent to the fact that the thermal conductivity of a material depends on its physical characteristics as well as some environmental factors such as humidity and temperature. In the case of metals or alloys, thermal conductivity is highly sensitive to heat treatment, crystal structure, and slight changes in composition.

The physical characteristics of the materials greatly influence the selection of a thermal conductivity apparatus. Selection of an instrument also depends on factors such as temperature range required, thermal characteristics of the material, size and shape of specimen available, precision required and time available to be spent on experiments.

The designer today is concerned with obtaining accurate thermal properties of materials that are known and are being developed and used under extreme conditions of thermal stresses and strains. These critical studies require reliable methods of determining the thermal properties of materials. Definite and highly involved theories on the transport of neat through various mediums have been developed by many scientists. Many of these theories have been verified experimentally to within reasonable accuracy. The limitations of these experimental methods make it impossible to use any one device over a large range of temperature or for ail known materials. Because of the limitations of the various apparatus a multitude of ingenious devices have been built to give accurate results as the temperatures go above or below normal conditions.

The purpose of this thesis is to include numerous experiments in one paper to provide a single reference for those interested, as the various publications are very specific, numerous and widely scattered. Experimental verification of one of the nonstandard methods is also undertaken as part of this work. Appendix A is exclusively set apart for the experimental part of this work. The author has made an attempt to include all the major experimental methods that appear to have any merit"--Introduction, pp, 1-2

Advisor(s)

Aaron J. Miles

Committee Member(s)

V. J. Flanigan
Howard D. Pyron
John August Nelson

Department(s)

Mechanical and Aerospace Engineering

Degree Name

M.S. in Mechanical Engineering

Publisher

Missouri School of Mines and Metallurgy

Publication Date

1963

Pagination

vii, 106 pages

Note about bibliography

Includes bibliographical references (pages 101-105)

Rights

© 1963 A. M. Sivadasan, All rights reserved.

Document Type

Thesis - Open Access

File Type

text

Language

English

Thesis Number

T 1505

Print OCLC #

5953621

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