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Synthesis of an (Al3BC + Al2O3)/Al composite with high stiffness and attractive high-temperature tensile properties

Jingyi Hu,Tong Gao,Mengyu Li,Xiangfa Liu

Materials Research Letters（2024）

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Abstract
A novel (8.5Al(3)BC + 14.5Al(2)O(3))/Al composite was fabricated with exceptional elevated-temperature properties and stiffness. The composite boasts an average Young's modulus of 99 GPa, with ultimate tensile strength and elongation of the composite at 350 degrees C averaging 188 MPa and 4.4%, respectively. The synergistic strengthening effect of Al3BC and gamma-Al2O3 is responsible for the high-temperature properties, while they both contribute to the improvement of stiffness as they have a high initial Young's modulus. This innovative composite design holds promising potential for advancements in material engineering and performance optimization.
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Key words
Aluminum matrix composites (AMC),microstructure,stiffness,elevated-temperature properties
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