Effect of Raw Material Particle Size on Compression Performance and Energy Release Characteristics of Ni/Al Energetic Structural Material

DING Qingyun; MA Dan; ZHAO Hongbao; MA Chaoqun; LUO Xinyi

doi:10.11973/jxgccl202201002

Materials and Mechanical Engineering > 2022 > 46(1): 7-13. > DOI: 10.11973/jxgccl202201002

DING Qingyun, MA Dan, ZHAO Hongbao, MA Chaoqun, LUO Xinyi. Effect of Raw Material Particle Size on Compression Performance and Energy Release Characteristics of Ni/Al Energetic Structural Material[J]. Materials and Mechanical Engineering, 2022, 46(1): 7-13. DOI: 10.11973/jxgccl202201002

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Effect of Raw Material Particle Size on Compression Performance and Energy Release Characteristics of Ni/Al Energetic Structural Material

1. Nanjing Fiberglass Research & Design Institute Co., Ltd., Nanjing 210012, China;
2. Composites Industry Center of National New Materials Testing and Evaluation Platform, Nanjing 210012, China;
3. College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211106, China

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Received Date: December 06, 2020
Revised Date: November 28, 2021

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Abstract

Ni and Al powders with particle size of 5 μm and 45—75 μm (1^#), 0.2 μm and 45—75 μm (2^#), 0.2 μm and 0.5 μm (3^#), respectively, and with molar ratio of 1:1 were mixed, and then Ni/Al energetic structural material samples were prepared by vacuum hot-pressing. The effect of powder particle size on the compression performance and energy release characteristics of the samples was studied. The results show that the three samples all had a Al₃Ni diffusion layer formed at the Ni/Al interface. In 1^# sample, the Ni particles uniformly distributed in the continuous Al matrix, and the compression performance was relatively good. In 2^# sample, the Ni particles agglomerated, and the relative density and compressive strength were the lowest. In 3^# sample, the Ni phase was continuous matrix, and the densification and compressive strength were the highest, but the most Al₃Ni was formed. As the particle size of the powders decreased, the exothermic reaction energy density of the three samples increased, up to 1 147.8 J·g^-1, the reaction activation energy was reduced, and the energy release efficiency was improved. The energy release characteristics of 3^# sample were the best.
- Ni/Al energetic structure material,
- powder size,
- compression performance,
- energy release characteristic,
- reaction activation energy

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