Synthesis, Densification, Microstructure, and Mechanical Properties of Samarium Hexaboride Ceramic
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.
L. Feng et al., "Synthesis, Densification, Microstructure, and Mechanical Properties of Samarium Hexaboride Ceramic," Journal of the American Ceramic Society, vol. 102, no. 3, pp. 1379 - 1385, Blackwell Publishing Inc., Mar 2019.
The definitive version is available at https://doi.org/10.1111/jace.15991
Materials Science and Engineering
Keywords and Phrases
Densification; Mechanical Properties; Microstructure; Samarium Hexaboride; Synthesis
International Standard Serial Number (ISSN)
Article - Journal
© 2018 American Ceramic Society, All rights reserved.
01 Mar 2019