Doctoral Dissertations

Abstract

"The diffusion of ²²sodium and ³⁶chlorine along tilt and twist grain boundaries in pure and calcium chloride doped sodium chloride bicrystals was investigated. No enhanced diffusion of ²²sodium along the grain boundaries was observed. Between 400°C and 500°C the chlorine grain boundary diffusion parameter, D'Δ, is described by D'Δ = (D'Δ)₀exp (-Qb/kT), where (D'Δ)₀ is approximately 10⁻⁷ cm³/sec and Qb is 1.15 ± .30 eV. The grain boundary angle, the grain boundary character (tilt or twist), and the calcium chloride concentration appear to have no pronounced effect upon the observed chlorine grain boundary diffusion. The ionic movement is believed to occur in the grain boundary core region by the movement of "interstitial" type chlorine ions"--Abstract, page i.

Advisor(s)

Wuttig, Manfred

Committee Member(s)

Weart, Harry W.
Leighly, Hollis P., 1923-2004
Moore, Robert E., 1930-2003
Ownby, P. Darrell
Frad, William A., 1909-1974

Department(s)

Materials Science and Engineering

Degree Name

Ph. D. in Metallurgical Engineering

Sponsor(s)

United States. Defense Advanced Research Projects Agency

Publisher

University of Missouri--Rolla

Publication Date

1969

Pagination

v, 55 pages

Note about bibliography

Includes bibliographical references (pages 52-54).

Rights

© 1969 Kenneth Ray Riggs, All rights reserved.

Document Type

Dissertation - Open Access

File Type

text

Language

English

Subject Headings

SaltKirkendall effect

Thesis Number

T 2363

Print OCLC #

6019836

Electronic OCLC #

850531528

Download

Included in

Metallurgy Commons

Share

 
COinS