Abstract In this work, a new tactic was proposed to fabricate Ti-Al3Ti core-shell particles reinforced Al matrix composites. Full densification of composites was realized by spark plasma sintering followed by hot rolling. Formation of Ti-Al3Ti core-shell particles was achieved by controlling the in-situ reaction between Al matrix and Ti particles during post annealing process. The obtained results show that such in-situ formed core-shell particles with a proper thickness of Al3Ti shell not only have strong interfacial bonding with Al matrix for effective load transfer, but also delay the composite fracture by inhibition of crack propagation, resulting in well balanced tensile strength (~ 241 MPa) and ductility (~ 19.8%). This work provides a new way to achieve high combination of strength and ductility of metal matrix composites for engineering application.

中文翻译：

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通过原位形成的Ti-Al3Ti核壳颗粒实现Al基复合材料的强度和延展性的高度结合

摘要 在这项工作中，提出了一种制备 Ti-Al3Ti 核壳颗粒增强铝基复合材料的新策略。通过放电等离子烧结和热轧实现复合材料的完全致密化。Ti-Al3Ti 核壳颗粒的形成是通过在后退火过程中控制 Al 基体和 Ti 颗粒之间的原位反应来实现的。所得结果表明，这种具有适当厚度的 Al3Ti 壳的原位形成的核壳颗粒不仅与 Al 基体具有很强的界面结合以有效传递载荷，而且还通过抑制裂纹扩展来延迟复合材料的断裂，从而获得良好的性能。平衡的拉伸强度 (~ 241 MPa) 和延展性 (~ 19.8%)。