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

长期中期研究：薄膜的X射线分析 包括耐磨涂层和超晶格在内的材料 结构 该奖项是根据长期计划提出的。 &在国外卓越中心的中期研究。 的 该计划旨在使美国科学家和工程师能够 在国外的研究机构进行长期研究， 证明卓越。 奖项提供了机会， 开展联合研究，以及使用独特或复杂的 实验设施、专业知识和实验条件 国外 这个奖项是为杰罗姆科恩博士赞助的一项提案颁发的， 支持Carla J. Shute博士对瑞典进行为期15个月的访问， 我和美国科学院的Torsten Ericsson教授合作， “薄膜X射线分析”中的技术链接 包括耐磨涂层和超晶格在内的材料 结构“薄膜材料的特性是 由于其增强的机械性能， 性能优于相同材料的散装试样。 的 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。 他们将检查这两个区域的残余应力 材料的sin θ多晶X射线衍射 法 对于TiN薄膜，研究人员将研究 生长过程中压应力产生机制 在低能量离子轰击下。 对于Mo/V超晶格， 他们将检验四维应变畸变理论 因为超模量效应。 超模量效应是一种 薄膜的弹性模量增加2 - 3倍 在小范围波长下观察到的调制结构 的组成调制。 他们也将采取措施- 四角应变的部分，在应变梯度附近， 界面的强度和连贯性， 调制波长的函数，以确定 相干应变可以解释这种增强的机械 行为 授标建议提供资金， 适当的，国际旅行，出国当地旅行， 津贴，家属津贴（如适用）和公寓 美国本土机构的行政津贴为250美元。

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.