用quantum Sutton-Chen多体势对AgxCu1-x在冷却速率为2×1012K/s凝固过程的模拟,发现AgxCu1-x在x=35～65范围内具有形成非晶的能力,特别是对应于二元相图共晶点的Ag60Cu40在凝固过程中二十面体和其它多面体结构不仅数目大,而且还具有极为稳定的遗传性,而最容易得到非晶态合金.证实了合金化效应对非晶态合金的形成倾向和稳定性的关键作用.此外采用键对及原子多面体类型指数法对凝固过程中微观结构组态变化的分析,不但能说明二十面体结构在非晶态合金形成和稳定性中所起的关键作用,又有助于对液态金属的凝固过程、非晶态微观结构特征的深入理解.
参考文献
| [1] | Duwez;Willens R H;Klement W .Continuous Series of Metastable Solid Solutions in Silver-Copper Alloys[J].Journal of Applied Physics,1960,31:1136. |
| [2] | Takayama S .Glass Formation and Stability[J].Journal of Materials Science,1976,11:164. |
| [3] | Yue Qi;Tahir Cagin;Yoshitaka et al.Molecular-dynamics Simulations of Glass Formation and Crystallization in Binary Liquid Metals:Cu-Ag and Cu-Ni[J].Physical Review B,1999,59(02):3527. |
| [4] | Junji Saida;Mitsuhide Matsushita;Akihisa Inoue .Direct observation of icosahedral cluster in Zr_(70)Pd_(30) binary glassy alloy[J].Applied physics letters,2001(3):412-414. |
| [5] | Zetterling FHM.;Simdyankin SI.;Dzugutov M. .Formation of large-scale icosahedral clusters in a simple liquid approaching the glass transition[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,2001(0):39-44. |
| [6] | Harrop JD.;Simdyankin SI.;Elliott SR.;Dzugutov M.;Taraskin SN. .Numerical structural analysis of the icosahedral glass and related structures[J].Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites,2001(0):556-561. |
| [7] | 郑采星,刘让苏,董科军,彭平,刘海蓉,徐仲榆,卢小勇.Simulation study on the formation and transition properties of cluster structures in liquid metals during rapid cooling processes[J].中国科学A辑(英文版),2002(02):233-240. |
| [8] | 郑采星,刘让苏,董科军,彭平,刘海蓉,徐仲榆,谢泉.液态金属大系统急冷过程中微结构转变机制的模拟研究[J].稀有金属材料与工程,2001(02):89-92. |
| [9] | Honeycutt J D;Andersen H C .Molecular-dynamics Study of Melting and Freezing of Small Lennard-Jones Clusters[J].Journal of Physical Chemistry,1987,91:4950. |
| [10] | ZHENG Cai-Xing,LIU Rang-su,DONG Ke-jun,PENG Ping,LIU Hai-rong,XU Zhong-yu,XIE Quan.Simulation study on transition mechanisms of microstructures during forming processes of amorphous metals[J].中国有色金属学会会刊(英文版),2001(01):35-39. |
| [11] | Sutton A P;Chen J .Long -rang Finnis-Sinclair Potentials[J].Philosophical Magazine Letters,1990,61(03):139. |
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