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Achieving exceptional strength by multi-dimensional in-situ Al3Ti, TiN, AlN reinforcements in Al matrix composites.

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Title:	Achieving exceptional strength by multi-dimensional in-situ Al3Ti, TiN, AlN reinforcements in Al matrix composites.
Authors:	Zhuang, Weici¹ (AUTHOR), Huang, Zhenying^1,2 (AUTHOR) zhyhuang@bjtu.edu.cn, Pei, Dingfeng³ (AUTHOR), Hu, Wenqiang¹ (AUTHOR), Yu, Qun¹ (AUTHOR), Wang, Hongjie¹ (AUTHOR), Li, Xue¹ (AUTHOR), Wu, Youbo¹ (AUTHOR), Du, Zhou¹ (AUTHOR), Sun, Qianwen¹ (AUTHOR)
Source:	Journal of Alloys & Compounds. Aug2024, Vol. 997, pN.PAG-N.PAG. 1p.
Subjects:	Aluminum composites, Titanium nitride, Flexural strength, Compressive strength, Titanium composites, Thermodynamics, Supply & demand
Abstract:	Despite the high demand for strong, lightweight, and tough Aluminum Matrix Composites (AMCs) across various applications, achieving desired property compatibility remains challenging due to limited control over the reinforcement processes. A novel AMC has been developed and synergistically reinforced with transgranular microscale Al 3 Ti, sub-microscale TiN, and intergranular nanoscale AlN, through Ti 2 AlN and Al in situ reaction. The in-situ multiphase-and-scale structure, resulting from the intricate reaction mechanisms and N interstitial solution, was analyzed using experimental investigations, thermodynamics and kinetics calculations, while the robust interfacial properties were studied by first-principles calculations. Both endowed the composite with exceptional strength (776 MPa and 635 MPa for compressive and flexural strength). Strengthen mechanisms were composed of fine-grain, solid-solution, and dislocation strengthening. This work succeeds in refining Al 3 Ti particles and creatively breaks through the bottleneck of synthesizing multi-dimensional and tunable in-situ reinforcements, expected to open new avenues for developing and applying a new generation of advanced AMCs. [Display omitted] • Advanced AMC with exceptional strength was fabricated through Ti 2 AlN and Al in situ reaction. • Transgranular microscale Al 3 Ti, sub microscale TiN, and intergranular nanoscale AlN were obtained. • Al 3 Ti coarsening was restricted. • The reaction mechanisms and the coherent transition interfaces were analyzed and calculated by DFT. • The strengthening mechanisms where the in-situ reinforcements do respective pieces were proposed. [ABSTRACT FROM AUTHOR]
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Database:	Engineering Source

Description
Abstract:	Despite the high demand for strong, lightweight, and tough Aluminum Matrix Composites (AMCs) across various applications, achieving desired property compatibility remains challenging due to limited control over the reinforcement processes. A novel AMC has been developed and synergistically reinforced with transgranular microscale Al 3 Ti, sub-microscale TiN, and intergranular nanoscale AlN, through Ti 2 AlN and Al in situ reaction. The in-situ multiphase-and-scale structure, resulting from the intricate reaction mechanisms and N interstitial solution, was analyzed using experimental investigations, thermodynamics and kinetics calculations, while the robust interfacial properties were studied by first-principles calculations. Both endowed the composite with exceptional strength (776 MPa and 635 MPa for compressive and flexural strength). Strengthen mechanisms were composed of fine-grain, solid-solution, and dislocation strengthening. This work succeeds in refining Al 3 Ti particles and creatively breaks through the bottleneck of synthesizing multi-dimensional and tunable in-situ reinforcements, expected to open new avenues for developing and applying a new generation of advanced AMCs. [Display omitted] • Advanced AMC with exceptional strength was fabricated through Ti 2 AlN and Al in situ reaction. • Transgranular microscale Al 3 Ti, sub microscale TiN, and intergranular nanoscale AlN were obtained. • Al 3 Ti coarsening was restricted. • The reaction mechanisms and the coherent transition interfaces were analyzed and calculated by DFT. • The strengthening mechanisms where the in-situ reinforcements do respective pieces were proposed. [ABSTRACT FROM AUTHOR]
ISSN:	09258388
DOI:	10.1016/j.jallcom.2024.174880