Masters Theses

Abstract

"The thermodynamic properties of iron-carbon-lead alloys are of interest for a variety of reasons related to steel production and recycling. Experimental procedures are described for a research program measuring the activity of lead in liquid iron and iron-carbon alloys. The solubility of lead in iron/iron-carbon alloys has been measured by equilibrating lead vapors with the iron/iron-carbon samples, in the temperature range of 1250° C -1600° C. The carbon composition of the iron-carbon alloys was in the range of 0 to 5.4 wt %. The solubility of lead increases with an increase in the temperature and decreases with an increase in the carbon content of the iron-carbon alloy. The measured solubility data for lead in molten iron/iron-carbon alloys were used to calculate the activity coefficient for lead using the Bale-Pelton unified interaction formalism as a function of alloy composition and temperature. The expression for In γ°Pb-C in the liquid region of the iron-carbon phase diagram as a function of temperature and carbon content is given by:

In γ°Pb-C = 13453/T + 0.061 = [ -37481/T +30.64] XC -[3912/T + 1.845] X2C

where γ°Pb-C is the Henrian activity coefficient of lead with respect to liquid lead as the reference state, T is the temperature in Kelvin and XC is the mole fraction of carbon"--Abstract, page iii.

Advisor(s)

Schlesinger, Mark E.

Committee Member(s)

Robertson, D. G. C.
James, William Joseph

Department(s)

Materials Science and Engineering

Degree Name

M.S. in Metallurgical Engineering

Comments

Financial support from the National Science Foundation (through grant DMR-9419560)

Publisher

University of Missouri--Rolla

Publication Date

Spring 1997

Pagination

viii, 44 pages

Note about bibliography

Includes bibliographical references (pages 42-43).

Rights

© 1997 Sandeep Malhotra, All rights reserved.

Document Type

Thesis - Restricted Access

File Type

text

Language

English

Thesis Number

T 7302

Print OCLC #

37721745

Electronic OCLC #

1079364068

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