用ab initio分子轨道HF方法、MP2方法和密度泛函(DFT)方法对Al-Ti-B中间合金主要形核粒子TiB2和AlB2各种可能的几何构型分别进行全优化,得到其稳定的几何构型和电子结构通过能量计算得知,存在同一体系Al-Ti-B合金中,TiB2是稳定的,说明TiB2的形核遗传性表现得很明显;由于AlB2体系能量较高,所以是相对不稳定的,产生了变异.这和实验结果相一致.并对TiB2和AlB2易聚集成团作出合理解释
参考文献
[1] | Abdel-Hamid A A. Z Metallkde, 1989,34:247 |
[2] | Jones G P, Pearson J. Metall Trans, 1976,7B: 223 |
[3] | McCartney D G. Int Mater Rev, 1989,34:247 |
[4] | Birch M E J, Fisher P. Aluminium Technology, London:The Institute of Metals, 1986:117 |
[5] | Guzowaski M M, Sigworth G K, Sentner D A. Metall Trans, 1987,18A: 603 |
[6] | Spittle J A, Sadli S. Cast Metals, 1995,7:247 |
[7] | Birch M E J, Cowell A J J. Solidification Processing, London: The Institute of Metals, 1988:149 |
[8] | McElvany S W, Cassady C J J. Phys Chem, 1990,94:2057 |
[9] | Chevel R, Hirrien M, Sergent M. Polyhedron, 1986,5:87 |
[10] | Mitchell P C H. Wear, 1984,100:281 |
[11] | Chianell R R. Catal Rev-Sci Eng, 1984,26:361 |
[12] | Becke A D. J Chem Phys, 1993,98:5648 |
[13] | Becke A D. J Chem Phys, 1988,88:1053 |
[14] | Kohn W, Sham L J. Phys Rev, 1965,140:1133 |
[15] | Lee C, Yang W, Parr R G. Phys Rev, 1988,37B: 785 |
[16] | Becke D A. Phys Rev, 1988,38:3 098 |
[17] | Miehlich B, Savin A, Stoll H, Preuss H. Chem Phys Lett,1989,157:200 |
[18] | McGartney D G. Int Mater Rev, 1989,34:247 |
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