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Interfacial Modification of Microcellular Carbon: Influence of Ceramic and Carbon Nanotube Coatings

Karumuri, Anil Kumar
http://rave.ohiolink.edu/etdc/view?acc_num=wright1262043697

Abstract Details

2009, Master of Science in Engineering (MSEgr), Wright State University, Materials Science and Engineering.
Microcellular carbon is an emerging ultra lightweight and efficient thermal management material, which also has great potential as a reinforcement material for selected composites. However, these porous materials exhibit relatively low mechanical properties, and are susceptible to degradation in oxidizing environment. The scope of this research is to investigate surface modification approaches that can address these issues. Two specific objectives were: (1) to develop ceramic coatings to improve the survivability of carbon foams in high temperature applications, and (2) to develop and test modifications that can improve cellular composites involving carbon foam. It was seen that a mixed layer of BN and SiC on the foam improves its oxidation resistance at high temperatures to the same extent as pure BN layer. However, the mixed layer had improved microstructure, and presence of silica phase, that maybe useful in development of selected functionally gradient coatings in the future. For modification related to future cellular composites, it was seen that attachment of carbon nanotubes (CNT) on the surface can significantly improve its bonding with other phases, and therefore the mechanical behavior of composites made from this foam. The influence of CNT attachment on mechanical performance and failure mechanics of foam-epoxy composite was investigated. Model studies were also carried out on planar graphite-epoxy interfaces using 3-point bending tests. It has been observed that the CNT attachment significantly improves the durability and toughness of the carbon-epoxy interface by preventing delamination.
Sharmila Mukhopadhyay, PhD (Advisor)
Raghavan Srinivasan, PhD (Committee Member)
Allen Jackson, PhD (Committee Member)
105 p.
Materials Science
Surface modifications; Carbon nanotubes; Cellular materials; Composites

Recommended Citations

Citations

  • Karumuri, A. K. (2009). Interfacial Modification of Microcellular Carbon: Influence of Ceramic and Carbon Nanotube Coatings [Master's thesis, Wright State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=wright1262043697

    APA Style (7th edition)

  • Karumuri, Anil Kumar. Interfacial Modification of Microcellular Carbon: Influence of Ceramic and Carbon Nanotube Coatings. 2009. Wright State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=wright1262043697.

    MLA Style (8th edition)

  • Karumuri, Anil Kumar. "Interfacial Modification of Microcellular Carbon: Influence of Ceramic and Carbon Nanotube Coatings." Master's thesis, Wright State University, 2009. http://rave.ohiolink.edu/etdc/view?acc_num=wright1262043697

    Chicago Manual of Style (17th edition)

wright1262043697
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© 2009, all rights reserved.
This open access ETD is published by Wright State University and OhioLINK.