Article
Synthesis, Densification, Microstructure, and Mechanical Properties of Samarium Hexaboride Ceramic
Journal of the American Ceramic Society
Abstract
Samarium hexaboride (SmB6) powders were synthesized by boro/carbothermal reduction of Sm2O3 with B4C. Nominally pure SmB6 powder had a mean particle size of about 400 nm and an oxygen content of 0.12 wt%. SmBO3 formed as an intermediate phase during the synthesis. The synthesized powder was hot pressed at 1950°C to produce SmB6 ceramics with relative densities > 99.6% and a mean grain size of 4.4 µm. Vickers' hardness was 20.1 ± 0.7 GPa. Young's modulus measured by bending and ultrasonic methods was 271 and 244 GPa, respectively. The flexure strength was 253 ± 79 MPa and fracture toughness was 2.1 ± 0.1 MPa m1/2. These are the first reported results of the microstructure and bulk mechanical behavior of SmB6 ceramics.
Department(s)
Materials Science and Engineering
Second Department
Physics
Keywords and Phrases
- Densification,
- Mechanical Properties,
- Microstructure,
- Samarium Hexaboride,
- Synthesis
Document Type
Article - Journal
Document Version
Citation
File Type
text
Language(s)
English
Rights
© 2018 American Ceramic Society, All rights reserved.
Publication Date
3-1-2019
Publication Date
01 Mar 2019
Disciplines
Citation Information
Lun Feng, William Fahrenholtz, Greg Hilmas and Yew San Hor. "Synthesis, Densification, Microstructure, and Mechanical Properties of Samarium Hexaboride Ceramic" Journal of the American Ceramic Society Vol. 102 Iss. 3 (2019) p. 1379 - 1385 ISSN: 0002-7820; 1551-2916 Available at: http://works.bepress.com/greg-hilmas/206/
YSH acknowledges support from the National Science Foundation under grant number DMR 1255607.