In situ processing of Al–TiB2 composite by the stir-casting technique
In situ processing of Al–TiB2 composite by the stir-casting technique
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DOI：
10.1016/s0924-0136(99)00038-2
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发表时间：
1999-05
影响因子：
6.3
通讯作者：
K. L. Tee;Ling Lu;M. Lai
中科院分区：
文献类型：
--
作者：
K. L. Tee;Ling Lu;M. Lai
采用搅拌铸造法成功制备了原位生成TiB 2颗粒增强铝基复合材料。通过优化工艺参数，制备出粒径为1-3 μm的复合材料。拉伸强度提高了61%，屈服强度提高了58%，模量提高了23%，这取决于TiB 2在Al中的体积分数。添加铜的Al基体的改性提高了机械性能的一个因素不小于2.5。断口形貌显示出韧窝状的断裂表面，表明即使存在与Al-Ti-B系统相关的粗大TiAl 3，仍保持相对较高的延展性。Al-TiB_2界面洁净，证明了原位处理的优点。
Al base composite reinforced by in situ TiB2particulates was successfully synthesized by the stir-casting technique. The composite, with a particulate size of 1–3 μm, was produced by optimizing the process variables. An improvement of up to 61% in tensile strength 58% in yield strength and 23% in modulus, depending upon the volume fraction of TiB2incorporated into the Al, was achieved. Modification of the Al matrix with the addition of copper improved the mechanical properties by a factor of not less than 2.5. Fractographs showed a dimpled fracture surface, indicating a retention of relatively high ductility not withstanding the presence of coarse TiAl3associated with the Al–Ti–B system. The exhibition of a clean Al–TiB2interface testified to the benefit that had been gained from the in situ processing.