SYNTHESIS, PROCESSING, AND CHARACTERIZATION OF TITANIUM CARBIDE AND TITANIUM DIBORIDE BASED MATERIALS FOR STRUCTURAL AND ELECTRONIC APPLICATION

This dissertation discusses the synthesis, processing, and characterization of titanium carbide (TiC) and titanium diboride (TiB2) based materials for structural and electronic application. A series of TiB2 and TiC-TiB2 powders was prepared through a novel carbon coated precursors method. Reaction process, phase evolution, and microstructures were analyzed and characterized. The synthesized powders have the advantages of fine particle size (nano to submicron grade, 100nm to 800nm), high purity (low levels of contaminations such as free carbon and oxygen), loose agglomeration, and high surface area (~2.5 m2/g to 7.2 m2/g). Using the synthesized powders, three categories of composites were prepared: (1) TiB2-TiC-Ni composites with improved mechanical properties for structural applications; (2) TiB2-TiNiFeCrCoAl high-entropy alloy (HEA) composites with enhanced hardness and toughness for structural application; (3) TiC-Ti3Al based composites with good electrical and oxidation properties as the interconnect in solid oxide fuel cell. The author focuses on the sintering mechanism, microstructure and interface, reactions, and properties characterizations of above three types of composites. Correlations of processing-microstructures-properties are discussed and established based on scientific observation.

Name thesis:degree_name

Doctor of Philosophy

Level thesis:degree_level

Campus Only Dissertation

Discipline thesis:degree_discipline

Engineering Science

Year dc:date.available

2016

Author dc:creator

• Fu, Zhezhen

Contributors dc:contributor

• Koc, Rasit

• Microstructures
• Sintering
• Synthesis
• Titanium Carbide
• Titanium Diboride

Repository record dc:identifier

https://opensiuc.lib.siu.edu/dissertations/1277

OAI identifier oai:identifier

oai:opensiuc.lib.siu.edu:dissertations-2281