Recent studies indicate B4C nanopowder may provide additional advantages without loss of established properties. In this study, preliminary forms of graphite-coated B4C nanopowders on the order of 20-40 nm with various additives were sintered and analyzed. Methanol washing was performed on the powders to remove most of the B2O3 impurity usually present. XRD analysis of the powders verified the nanograined nature and, to some extent, the amount of amorphous material within the powders. A dilatometer furnace was used to track the dimensional changes during sintering, and densities of sintered samples were compared to green compact densities. The onset of sintering occurred at various temperatures depending on the dopant and its amount, most often occurring at higher temperatures than expected. This was likely due first to volatilization of residual B2O3 and then to the graphite coatings of the powders preventing direct B4C-B4C contact. Double-stage sintering, where sintering is either slowed, arrested or reversed and then re-accelerated, occurred in all but one sample. Samples with sintered densities greater than 93% theoretical density were hot isostatically pressed (HIP) with the expectation that the post-HIP density would be 100% theoretical density. Ultimately, post-HIP densities increased less than 2% compared to sintered densities.

Thesis(M.S.)--Auburn University, 2006. / Abstract. Vita. Includes bibliographic references.

Thesis (M.A.)--University of Wisconsin--Madison, 1968. / Title from title screen (viewed May 13, 2009). Includes bibliographical references. Online version of print original.

Thesis (doctoral)--Ethnikon kai Kapodistriakon Panepistēmion Athēnōn, Philosophikē Scholē. / Summary in English. Includes bibliographical references (p. xx-xxviii) and index.

Thesis (Ph. D.)--Rutgers University, 2007. / "Graduate Program in Ceramic and Materials Science and Engineering." Includes bibliographical references (p. 494-501).

Thesis (Ph. D.)--Rutgers University, 2008. / "Graduate Program in Ceramic and Materials Science and Engineering." Includes bibliographical references (p. 210-219).

Thesis (M.S. in Operations Research)--Naval Postgraduate School, 2005. / Title from title screen (viewed Jan. 31, 2006). "June 2005." Includes bibliographical references (p. 89-90). Also issued in paper format.

Inaug.-Diss.--Heidelberg. / Vita. Published also as Anglistischen Forschungen, Heft 15. Bibliography: p. 1-12.

Thesis (M.S. in Operations Research)--Naval Postgraduate School, June 2005. / Thesis Advisor(s): Thomas W. Lucas, Richard Spainhour. Includes bibliographical references (p. 89-90). Also available online.

Thesis (M.A.)--University of Wisconsin--Madison, 1967. / eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.