Doctoral Dissertations


Jenq Liu


"This dissertation represents the culmination of extensive experimentation and research in the area of particulate and whisker reinforced ceramic matrix composites. Diamond, boron carbide, and titanium diboride particles as well as boron carbide whiskers were employed as second phases to improve and enhance the physical properties of the ceramic matrix. Judicious selection of both the toughening agents and the high strength ceramic matrices, as well as the appropriate processing treatment have yielded composite systems distinguished by their outstanding thermal and/or mechanical properties.

The main body of this dissertation is comprised of four papers. Two have been published in the Journal of the American Ceramic Society, while the other two have been published in the Ceramic Engineering Science Proceedings. The Appendices include two other recently published papers which are also part of this dissertation research.

"Particulate and Whisker Reinforced Alumina Matrix Composites" summarizes the interaction of various reinforcing media within an alumina matrix and the resulting effect they impart upon various physical properties. "Normal Pressure Hot Pressing of a-Alumina/Diamond Composites" and "Nano-Diamond Enhanced Silicon Carbide Matrix Composites" discuss the processing of unique high hardness, high thermal performance diamond composites utilizing a-alumina and silicon carbide matrices, respectively. Discussion and assessment of both the whisker and particle effects of boron carbide on the a-alumina matrix is given in "Physical Properties of Alumina-Boron Carbide Whisker/Particle Composites" and in Appendix A, "Boron Carbide Reinforced Ceramic Matrix Composites." In Appendix B, the paper entitled, "Enhanced Mechanical Properties of Alumina by Dispersed Titanium Diboride Particulate Inclusions" examines composites of the a-alumina/titanium diboride particle system and compares various methods of fracture toughness measurement for such composites"--Abstract, page iv.


Ownby, P. D.

Committee Member(s)

Moore, Robert E., 1930-2003
Rahaman, M. N., 1950-
Kohser, Ronald A.
Newkirk, Joseph William


Materials Science and Engineering

Degree Name

Ph. D. in Ceramic Engineering


University of Missouri--Rolla

Publication Date

Fall 1991

Journal article titles appearing in thesis/dissertation

  • Particulate and Whisker Reinforced Alumina Matrix Composites
  • Normal Pressure Hot Pressing of α-Alumina/Diamond Composites
  • Physical Properties of Alumina-Boron Carbide Whisker/Particle Composites
  • Nano-Diamond Enhanced Silicon Carbide Matrix Composites


xiv, 94 pages

Note about bibliography

Includes bibliographical references.


© 1991 Jenq Liu, All rights reserved.

Document Type

Dissertation - Restricted Access

File Type




Thesis Number

T 6325

Print OCLC #


Electronic OCLC #


Link to Catalog Record

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