Surface Segregation and Surface Phase Transitions in Simple Alloys

两个研究领域正在探索在这个赠款，表面 三元合金中的偏析和偏析中的相变 二元合金的表面层。 包括三元合金系统 有镍银钯，镍银金， 和镍金钯。 这些合金系统特别 选择他们的简单性和种族隔离的倾向。 的 正在研究的二元系统包括铜银，镍， 银、铁铜和铁金。 这些后一种合金体系 很可能表现出表面相变。 多晶 研究中需要单晶样品。 所观察到的行为的建模是基于蒙特卡罗 在超级计算机上使用嵌入式原子方法进行模拟。

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.