Title: Analysis of the sintering force in copper
Full Citation
Permanent Link: http://ufdc.ufl.edu/UF00097799/00001
 Material Information
Title: Analysis of the sintering force in copper
Physical Description: xiii, 126 leaves. : illus. ; 28 cm.
Language: English
Creator: Gregg, Roger Allen, 1938- ( Dissertant )
Rhines, F. N. ( Thesis advisor )
Reed-Hill, R. E. ( Reviewer )
Bailey, T. L. ( Reviewer )
Blake, R. G. ( Reviewer )
Publisher: University of Florida
Place of Publication: Gainesville, Fla.
Publication Date: 1968
Copyright Date: 1968
Subjects / Keywords: Sintering   ( lcsh )
Copper   ( lcsh )
Metallurgical and Materials Engineering thesis Ph. D
Dissertations, Academic -- Metallurgical and Materials Engineering -- UF
Genre: bibliography   ( marcgt )
non-fiction   ( marcgt )
Abstract: The sintering force is defined as the external load which will balance the contractile tendency of a sinter body in the direction of its application. Experimental measurements of the sintering force were made upon uneompacted, sintered copper specimens as a function of apparent density, sintering temperature and particle size. All measurements were obtained from specimens sintering in dry, deoxidized hydrogen. Measurements of void volume and of surface area and average mean curvature of the void-solid interface were made through the procedures of quantitative metallography. The sintering force was found to increase from zero at the onset of sintering, pass through a maximum at approximately 90 per cent of theoretical density and decrease toward zero at bulk density. This general behavior was observed for each particle size. The magnitude of the sintering force at any density increased with a decrease in particle size. There was no effect of temperature on the sintering force in copper over the range 950 to 1050 C. The surface area per unit volume-density relationship was observed to be linear for each particle size. Variation of the average mean surface curvature with density was found to be qualitatively identical to that observed for the sintering force. The results are analyzed on the basis of a balance between the externally applied force and the surface tension forces promoting shrinkage. A quantitative expression of the sintering force in terms of the surface geometry and surface tension of the sinter body is derived from basic concepts of capillarity. A comparison is made of the sintering forces predicted by this relation and experimental value; Sensitivity of the rate of shrinkage to the geometry of the microstructure of the sinter body will be demonstrated through simultaneous application of the concept of the sintering force, an empirical ^treatment of the mechanical behavior of the sinter body and a stress-strain rate relation based on deformation by creep.
Thesis: Thesis - University of Florida.
Bibliography: Bibliography: leaves 122-125.
Additional Physical Form: Also available on World Wide Web
General Note: Manuscript copy.
General Note: Vita.
 Record Information
Bibliographic ID: UF00097799
Volume ID: VID00001
Source Institution: University of Florida
Holding Location: University of Florida
Rights Management: All rights reserved by the source institution and holding location.
Resource Identifier: alephbibnum - 001133265
oclc - 20143485
notis - AFN0634


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