Preparation and Characterization of Al₂O₃-B₄C Coated Composite Powder by Hydrothermal Method

Abstract:

Both alumina and boron carbide have good hardness and strength, and are widely used in production and life, industrial manufacturing, and military defense. However, due to the insufficiency of research at this stage and the lack of technical means, it is difficult to prepare alumina-boron carbide composite powder with good coating and ultra high strength through large-scale batch production. Therefore, this experiment wants to obtain a relatively good performance of coated Al₂O₃/B₄C cermet by hydrothermal method through different experimental parameter ratios. Through the experimental results and analysis, the following conclusions are obtained. The most suitable concentration of aluminum nitrate is 0.1 mol/l. The low concentration affects the formation of alumina particles. The concentration is too high and prone to agglomeration. Through the optimization of hydrothermal synthesis concentration, a composite of Al₂O₃/B₄C composite with good nanoencapsulated structure was obtained. The composite powder was pure in composition and high in specific surface area, which lays a foundation for solving the low-temperature preparation of high-density boron carbide ceramics.

• Periodical: Materials Science Forum (Volume 977)
• Pages: 96-101
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.977.96
• Online since: February 2020
• Authors: Fang Wang, Rui Hua Wang, Min Han Xu, Xiao Bo Bai, Ai Xia Chen*, Da Ming Du, Shi Bin Li, Jie Guang Song, Lin Chen
• Keywords: Alumina, Composite Powder, Hydrothermal Method, Metallic Ceramic Materials

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