Research on experimental synthesis and sintering of ZrB2
Architectural Engineering Institute, Guangdong University of Petrochemical Technology, 525000, Maoming, China
2 School of Materials Science and Engineering, Heilongjiang University of Science and Technology, 150024, Harbin, China
3 College of Civil Engineering, Dalian Nationalities University, 116000, Dalian, China
Accepted: 20 September 2022
Published online: 18 October 2022
ZrB2 with excellent high-temperature properties is used as ultra-high-temperature materials. How to synthesize ZrB2 powder with high purity and excellent properties is a key issue. In this paper, ZrB2 powder is synthesized in a vacuum by Boronthermal and Carbothermal reduction. Based on the thermodynamic calculation, the reaction process of Boronthermal and Carbothermal reduction is analyzed. The effect of reaction temperature and different raw materials ratios on the synthetic ZrB2 powder is studied by XRD. The results show that different raw materials ratio has little effect on the reduction product and reaction temperature has a great effect on it. The synthetic ZrB2 powder at 1600 °C has good properties. The synthetic ZrB2 powder with different raw materials ratio at 1600 °C is pressed into a film and sintered at 1800 °C. The phase and microstructure are studied by XRD and SEM. The results show that the synthetic powders with B4C and C powder excess 10% and 30% have good properties.
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