Files in this item

FilesDescriptionFormat

application/pdf

application/pdf8600313.pdf (4MB)Restricted to U of Illinois
(no description provided)PDF

Description

Title:Grain Boundary Structure in Alumina
Author(s):Shiue, Yeong Ruey
Department / Program:Metallurgy and Mining Engineering
Discipline:Metallurgical Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Degree:Ph.D.
Genre:Dissertation
Subject(s):Engineering, Materials Science
Abstract:Grain boundary microstructures in alumina ceramics are prone to show glassy phases, faceting, and some fraction of highly coincident twin-related boundaries. These separate phenomena and their inter- actions have been studied in six distinct materials of both commer- cial and experimental origin. Glass containing materials show high density of (SIGMA) = 3 basal twins and few others. Some hot pressed materials show, in addition to basal twins, (SIGMA) = 7 rhombohedral twins and two distinct varieties of 10(')11 twins new to alumina. All these boundaries are analyzed using the CSL/DSCL model and an idealized axial ratio c/a = SQRT.(15/2); 0 lattice methods are employed to estimate the error introduced by that idealization. The basal and rhombohedral twins seem well-described by the model, while the 10(')11 ones show unexpected displacements from coincident geometries.
Issue Date:1985
Type:Text
Description:128 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1985.
URI:http://hdl.handle.net/2142/71825
Other Identifier(s):(UMI)AAI8600313
Date Available in IDEALS:2014-12-16
Date Deposited:1985


This item appears in the following Collection(s)

Item Statistics