Type
Text
Type
Thesis
Advisor
Sampath, Sanjay | Herbert Herman | Albert Tobin.
Date
2010-12-01
Keywords
Composites, Free-Standing Deposits, Heat Treatment, Mechanical Properties, Phase Transformations, Thermal Spray | Materials Science
Department
Department of Materials Science and Engineering
Language
en_US
Source
This work is sponsored by the Stony Brook University Graduate School in compliance with the requirements for completion of degree.
Identifier
http://hdl.handle.net/11401/72571
Publisher
The Graduate School, Stony Brook University: Stony Brook, NY.
Format
application/pdf
Abstract
The microstructure and properties of plasma-sprayed ceramics and ceramic matrix composites (CMCs) have been investigated. Substrate-free deposits were fabricated by plasma spraying onto expendable graphite substrates. The deposits were evaluated in the as-sprayed and heat-treated conditions. X-ray diffractometry (XRD) was used in conjunction with differential scanning calorimetry (DSC) to examine the phase content and transformation temperatures of plasma-sprayed Al2O3. Mechanical properties were measured using three-point flexural testing and density measurements were made for both the as-sprayed and heat treated conditions. Significant increases in modulus and strength were achieved as a result of post. spray heat treatment.Having established baseline properties with respect to the pure matrix material, the effect of incorporating a second phase was examined. Ceramic matrix composites were fabricated by plasma-spraying a mechanical mixture of Al2O3 and SiC particulate. Composites consisted of particulate SiC and re-solidified inclusions in an Al2O3 matrix. Significant improvements in strength and modulus resulted from the incorporation of second phase combined with heat-treatment
Recommended Citation
LaPierre, Kerry James, "The Microstructure and Properties of Plasma Sprayed Ceramic Composites" (2010). Stony Brook Theses and Dissertations Collection, 2006-2020 (closed to submissions). 1775.
https://commons.library.stonybrook.edu/stony-brook-theses-and-dissertations-collection/1775