Abstract
Mn/Al/B mixed powders were used as raw material for the thermal explosion reaction in a tubular furnace to rapidly prepare Mn2AlB2 ceramics with high content at low temperature. The effects of raw material ratio, raw material particle size, and NaCl additives on the synthesis of Mn2AlB2 were studied systematically. The formation mechanism of Mn2AlB2 was proposed. The thermal explosion reaction was induced when the preheating temperature was approximately 686.9°C. The materials with MnB, Al, and Mn2AlB2 were synthesized as main phases. Mn2B and AlMnx were obtained in small amounts. Increasing the content of Al or refining the Mn and B size in the raw material reduced the content of MnB and other impurities in the product significantly, thereby promoting the synthesis of Mn2AlB2. The thermal explosion products were porous, and the sintering degree was weak. Many lathed Mn2AlB2 grains with an approximate size of 4 μm were obtained. A mechanism for the thermal explosion synthesis of Mn2AlB2 was proposed.
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ACKNOWLEDGMENTS
This project was sponsored by the National Natural Science Foundation of China (51864028), Key scientific and technological projects in Henan Province (212102210465), Key scientific research project plan of colleges and universities in Henan Province (22A430041, 22B430035), National innovation and entrepreneurship training program for College Students (202110465013), National Natural Science Foundation of China (NSAF, U2030207).
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Liang, B., Zhu, D., Zhang, Q. et al. Preparation of Mn2AlB2 Material via Thermal Explosion. Russ. J. Non-ferrous Metals 63, 448–455 (2022). https://doi.org/10.3103/S1067821222040022
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DOI: https://doi.org/10.3103/S1067821222040022