Preparation of a novel layer-structured Ti3Al matrix composite sheet by liquid-solid reaction between Al foils and TiB/Ti composite foils
Preparation of a novel layer-structured Ti3Al matrix composite sheet by liquid-solid reaction between Al foils and TiB/Ti composite foils
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Al箔与TiB/Ti复合箔液固反应制备新型层状结构Ti3Al基复合材料片
DOI：
10.1016/j.matdes.2016.04.009
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发表时间：
2016
影响因子：
8.4
通讯作者：
Meng Songhe
中科院分区：
文献类型：
--
作者：
Cui Xiping;Fan Guohua;Huang Lujun;Gong Jinxin;Wu Hao;Zhang Tongtong;Geng Lin;Meng Songhe
探索了一种利用反应退火制备完全致密的Ti 3Al基复合材料板材的方法。值得注意的是，Ti 3Al基复合材料显示出独特的多层结构，由富TiB层和Ti 3Al层交替组成。实际上，TiB晶须在Ti 3Al层中呈层状分布，这有利于Ti 3Al层中的等轴晶粒细化。阐明了复合材料层状组织的形成机理。多层TiB-Ti 3Al复合材料在保持甚至提高高抗拉强度的同时，塑性显著提高。虽然断裂韧性没有达到预期水平，但认为应该通过增加TiB晶须的长径比和体积分数来提高断裂韧性。
An alternative approach was successfully explored to produce fully dense Ti3Al matrix composite sheets using reaction annealing of the sandwich-structured (TiB/Ti)–Al laminates. It was noteworthy that the Ti3Al matrix composites displayed a unique multi-layered structure, composing of alternating TiB-rich layers and Ti3Al layers. Actually, TiB whiskers exhibited a layered distribution in Ti3Al layers, which was in favor of the equiaxed grain refinement in Ti3Al layers. Formation mechanism of the composites' laminated microstructure was elucidated. The multi-layered TiB–Ti3Al composites showed a significant increase in plasticity while maintaining or even improving the high tensile strength. Although the fracture toughness did not reach the desired level, however it was believed that the fracture toughness should be improved by means of increasing the long-aspect ratio of TiB whiskers and the volume fraction.