Pressureless Sintering of Carbon-coated Zirconium Diboride Powders

Author

Sumin Zhu
Greg Hilmas, Missouri University of Science and TechnologyFollow
Shi C. Zhang, Missouri University of Science and TechnologyFollow
William Fahrenholtz, Missouri University of Science and TechnologyFollow

Abstract

Carbon-coated zirconium diboride powders were sintered to near theoretical density at temperatures as low as 1900 °C without an external pressure. Relative density increased from not, vert, similar70% for uncoated ZrB2 to >99% for ZrB2 coated with at least 1.0 wt% carbon. Thermodynamic analysis indicated that carbon reacted with and removed oxide impurities (ZrO2 and B2O3) that were present on the particle surfaces, which promoted densification by minimizing grain coarsening. The effects of initial particle size and carbon content on densification, microstructure, and properties were investigated.

Recommended Citation

S. Zhu et al., "Pressureless Sintering of Carbon-coated Zirconium Diboride Powders," Materials Science and Engineering: A, Elsevier, Jun 2007.

The definitive version is available at https://doi.org/10.1016/j.msea.2007.02.116

Department(s)

Materials Science and Engineering

Sponsor(s)

National Science Foundation (U.S.)

Keywords and Phrases

Zirconium Diboride; Carbon; Microstructure; Sintering; Thermodynamics

International Standard Serial Number (ISSN)

0921-5093

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2007 Elsevier, All rights reserved.

Publication Date

25 Jun 2007