Surface Segregation and Surface Phase Transitions in Simple Alloys

该基金正在探索两个研究领域：三元合金的表面偏析和二元合金中偏析表面层的相变。三元合金系统包括在程序是镍-银-钯，镍-银-金和镍-金-钯。这些合金体系因其简单性和偏析倾向而被特别选择。所研究的二元系统包括铜-银、镍-银、铁-铜和铁-金。后一种合金体系可能表现出表面相变。研究中需要多晶和单晶样品。对观察到的行为进行建模是基于在超级计算机上使用嵌入式原子方法进行蒙特卡罗模拟。

Two research areas are being explored in this grant, surface segregation in ternary alloys and phase transitions in segregated surface layers in binary alloys. Ternary alloy systems included in the program are nickel-silver-palladium, nickel-silver-gold, and nickel-gold-palladium. These alloy systems are specially selected for their simplicity and segregation tendencies. The binary systems under examination include copper-silver, nickel- silver, iron-copper, and iron-gold. These latter alloy systems are likely to show surface phase transitions. Polycrystalline and single crystal samples are required in the research. Modelling of the observed behavior is based on the Monte Carlo simulation using the Embedded Atom Method on a supercomputer.