Discover the SciOpen Platform and Achieve Your Research Goals with Ease.
Search articles, authors, keywords, DOl and etc.
In this paper, Zr2SB ceramic with purity of 82.95 wt% (containing 8.96 wt% ZrB2 and 8.09 wt% zirconium) and high relative density (99.03%) was successfully synthesized from ZrH2, sublimated sulfur, and boron powders by spark plasma sintering (SPS) at 1300 ℃. The reaction process, microstructure, and physical and mechanical properties of Zr2SB ceramic were systematically studied. The results show that the optimum molar ratio to synthesize Zr2SB is n(ZrH2):n(S):n(B) = 1.4:1.6:0.7. The average grain size of Zr2SB is 12.46 μm in length and 5.12 μm in width, and the mean grain sizes of ZrB2 and zirconium impurities are about 300 nm. In terms of physical properties, the measured thermal expansion coefficient (TEC) is 7.64×10−6 K−1 from room temperature to 1200 ℃, and the thermal capacity and thermal conductivity at room temperature are 0.39 J·g−1·K−1 and 12.01 W∙m−1∙K−1, respectively. The room temperature electrical conductivity of Zr2SB ceramic is measured to be 1.74×106 Ω−1∙m−1. In terms of mechanical properties, Vickers hardness is 9.86±0.63 GPa under 200 N load, and the measured flexural strength, fracture toughness, and compressive strength are 269±12.7 MPa, 3.94±0.63 MPa·m1/2, and 2166.74±291.34 MPa, respectively.
1290
Views
130
Downloads
23
Crossref
26
Web of Science
26
Scopus
0
CSCD
Altmetrics
Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made.
The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder.
To view a copy of this licence, visit http://creativecommons. org/licenses/by/4.0/.