Long & Medium Term Research: X-ray Analysis of Thin Film Materials Including Wear Resistant Coatings and SuperlatticeStructures

中长期研究：薄膜材料的x射线分析，包括耐磨涂层和超晶格结构。该奖项是在国外卓越中心长期和中期研究计划下推荐的。该项目旨在使美国科学家和工程师能够在国外被证明卓越的研究机构进行长期研究。该奖项为开展联合研究以及利用国外独特或互补的设施、专业知识和实验条件提供了机会。该奖项由Jerome Cohen博士赞助，旨在支持Carla J. Shute博士对瑞典进行为期15个月的访问，与Link bbbbping理工学院的Torsten Ericsson教授一起研究“薄膜材料（包括耐磨涂层和超晶格结构）的x射线分析”。薄膜材料的性能是相当感兴趣的，因为它们的力学行为比相同材料的大块样品增强。研究人员将研究两种类型的薄膜结构：TiN耐磨涂层和Mo/V超晶格结构。他们将用正弦法检查这两种材料的残余应力。多晶x射线衍射技术。对于TiN薄膜，研究人员将研究低能离子轰击下生长过程中压应力产生的机制。对于Mo/V超晶格，他们将研究超模效应的四方应变变形理论。超模效应是在组成物调制的小波长范围内观察到的薄膜调制结构的弹性模量增加2 - 3倍。他们还将测量四方应变，界面附近的应变梯度，以及界面的强度和相干性作为调制波长的函数来确定相干应变是否可以解释这种增强的力学行为。奖励建议提供资金，酌情支付国际旅行，本地旅行，津贴，家属津贴（如果适用），以及美国本土机构250美元的固定行政津贴。

Long & Medium-Term Research: X-ray Analysis of Thin Film Materials Including Wear Resistant Coatings and Superlattice Structure. This award recommendation is made under the Program for Long & Medium-Term Research at Foreign Centers of Excellence. The program seeks to enable U.S. scientists and engineers to conduct long-term research abroad at research institutions of proven excellence. Awards provide opportunities for the conduct of joint research, and the use of unique or compli- mentary facilities, expertise and experimental conditions in foreign countries. This award for a proposal sponsored by Dr. Jerome Cohen is to support a 15 month visit by Dr. Carla J. Shute to Sweden to work with Professor Torsten Ericsson of the Institute of Technology in Link>ping on "X-Ray Analysis of Thin Film Materials Including Wear Resistant Coatings and Superlattice Structure." The properties of thin film materials are of considerable interest due to their enhanced mechanical behavior over bulk specimens of the same material. The researchers will examine two types of thin film structures: TiN wear resistant coatings and Mo/V superlattice structures. They will examine the residual stresses in both of these materials by the sin.theta polycrystalline x-ray diffraction technique. For the TiN films, the researchers will study the mechanism of compressive stress generation during growth under low energy ion bombardment. For the Mo/V superlattices, they will examine the tetragonal strain distortion theories for the supermodulus effect. The supermodulus effect is a two-three fold increase in the elastic modulus of thin film modulated structures observed for a small range of wavelengths of the composition modulation. They will also make measure- ments of the tetragonal strain, gradient in strain near the interface, and strength and coherency of the interface as a function of the wavelength of the modulation to determine if coherency strains can explain this enhanced mechanical behavior. The award recommendation provides funds to cover, as appropriate, international travel, local travel abroad, stipend, dependents' allowance if applicable, and a flat administrative allowance of $250 for the U.S. home institution.