Recently, Beijing Jiaotong University,China Porcelain Fuchi (Suzhou) High Tech Nano Matervials Co. Ltd.Together with Southern University of Science and Technology, important research progress has been made in the field of high temperature ceramics.“Synthesis and properties of MoAlB composites reinforced with SiC particles”Published in International Ceramics Journal《Journal of Advanced ceramics》.The journal is sponsored by the State Key Laboratory of New Ceramics and Fine Technology of Tsinghua University and the Advanced Ceramics Branch of the Chinese Ceramic Society. At present, the journal's impact factor IF is about to break 10, and it will catch up with international journals such as "Ou Tao" and "Meituo" in the field of materials to become one of the top journals in the field of ceramics.

MoAlB is a ternary boride material with great application potential in MAB phase composites (MAB phase, M is transition metal, A is aluminum or zinc element, and B is boron element). This material is easy to prepare at lower temperature (1050 °C -1200 °C), and has better high-temperature oxidation resistance than other Al-containing MAB phase materials in the application environment below 1300 °C. At present, the research on further improving the high temperature oxidation resistance and mechanical properties of MoAlB is not perfect. Researchers still face huge challenges in how to improve the comprehensive properties of composite materials more simply and efficiently.

Figure (a) SiC/MoAlB (b) TEM image of the dotted area in Figure a)

Fig. Reinforced i/MoAlB composite with a) flexural strength b) Vickers hardness

SiC particles have high hardness and excellent oxidation resistance. Adding SiC particles to MAX phase composites is often used as one of the simplest and most efficient methods to improve the mechanical properties and high temperature oxidation resistance of materials.Beijing Jiaotong University andChina Porcelain Fuchi (Suzhou) High Tech Nano Matervials Co. Ltd.Inspired by the related research on MAX phase ceramic materials, the researchers innovatively added SiC particles to MoAlB materials as the second phase particles to prepare SiC/MoAlB composites, filling the gap in related research fields. The flexural strength and Vickers hardness of the strengthened SiC/MoAlB composites reached380 MPa和12.7 GPa，Compared with the unreinforced material, the24 %和51 %，And the strengthened composites formed in cyclic oxidation tests at 1200 °C-10 h and 1300 °C-10 h.The dense alumina and silica prevent the continued inward diffusion of oxygen and the evaporation of oxides.The reinforced composite showed excellent anti-oxidative properties.The second-phase reinforcement strategy provided by this important research result will help to broaden the application scope of MoAlB composites.MoAlB。