Phases, microstructures, and microchemistry of silicon carbide-based ceramics

Pure SiC. Transparent, translucent and opaque regions of high purity bulk SiC grown by chemical vapor deposition (CVD) were characterized for physical properties as well as for microstructure and chemical purity to correlate the degree of optical transparency with other material characteristics. A good correlation was obtained between SiC IR transmission and its microstructure. The transparent material was characterized by pure, essentially defect-free, β-SiC (cubic) grains was highly oriented, with a $\langle 111\rangle$ direction parallel to the deposition surface. The translucent material of various colors was mostly cubic in structure but contained large amounts of twins. Opaque CVD SiC was randomly oriented, and contained one directional disorder with hexagonal (α-SiC) symmetry in the majority of grains and high density of dislocations elsewhere.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Materials Science and Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2011

Author dc:creator

• Kim, Yongil

Contributors dc:contributor

• Zangvil, Avigdor

• Engineering, Materials Science

Statement dc:rights

• Copyright 1994 Kim, Yongil

Language dc:language

eng

Identifier

AAI9512428
(UMI)AAI9512428

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/22955