Thermodynamic effect of alloying addition on in-situ reinforced TiB2/Al composites
Thermodynamic effect of alloying addition on in-situ reinforced TiB2/Al composites
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DOI：
10.1007/s11661-005-0154-8
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发表时间：
2005-01-01
影响因子：
2.8
通讯作者：
Zhang, D
中科院分区：
文献类型：
--
作者：
Fan, TX;Yang, GA;Zhang, D
从热力学的角度，利用威尔逊方程和扩展的米耶瓦模型，研究了原位增强TiB_2/Al复合材料制备过程中合金元素对析出相稳定性的影响。结果表明，添加镁、铜、锆、镍、铁、钒、镧等合金元素可以促进Al3Ti和TiB2相的形成。特别是在这些合金化元素中，以Zr的作用最为显著。此外，合金元素对AlB_2的形成有一定的阻碍作用。计算结果还表明，在熔剂辅助合成原位增强TiB_2/Al过程中，镁比铝更容易与盐反应生成TiB_2。
From the viewpoint of thermodynamics, using the Wilson equation and an extended Miedema model, the effect of the alloying element on the stability of the precipitated phases during the fabrication of in-situ reinforced TiB2/Al composites was evaluated. The result shows that additions of alloying elements, such as Mg, Cu, Zr, Ni, Fe, V, and La, can promote the formation of Al3Ti and TiB2 phases. Particularly, Zr has the most pronounced effect among these alloying elements. In addition, alloying elements can hinder the formation of AlB2 to a small extent. The calculation results also Show that it is easier for magnesium to react with the salts to form TiB2 than aluminum during the fabrication of in-situ reinforced TiB2/Al using the flux-assisted synthesis (FAS) technology.