US-France Cooperative Research: Structure and Properties ofCrystalline-Amorphous Composite Coatings on Stainless Steel

该奖项将支持美国和法国材料科学家在离子辅助不锈钢涂层主题上的合作研究。美国调查人员都来自斯坦福大学，他们是：罗伯特·辛克莱博士、威廉·尼克斯博士和大卫·史蒂文森博士。法国同行是普瓦蒂埃大学金工物理实验室的P.Moine教授。在过去的十年里，离子实施已经成为一种通用和有效的材料性能改性方法，包括金属、半导体、陶瓷、复合材料和聚合物的材料性能的改性。在这个项目中，研究人员将对不锈钢的离子辅助涂层进行科学研究。其技术目标是将非晶态TiNi与BN相结合，实现低摩擦系数、高耐磨、耐腐蚀的表面。所涉及的科学问题将是：1.涂层微观结构与离子束处理条件的关系，通过对各种样品进行彻底的材料表征。2.表面性能与显微组织的关系，特别是附着力、纳米硬度、摩擦、磨损和腐蚀。普瓦蒂埃实验室在离子注入、二次离子质谱仪和X射线表征以及摩擦学性能研究方面设备齐全。斯坦福集团在横截面透射电子显微镜、薄膜的机械性能和电化学腐蚀研究方面经验丰富。这项研究的结果将提供1)关于新型和有前途的不锈钢涂层的结构、性能和形成机理的新知识，2)加深对离子辅助涂层技术的理解。

This award will support collaborative research between U.S. and French material scientists on the topic of ion-assisted coating of stainless steel. The U.S. investigators, all from Stanford University, are: Dr. Robert Sinclair, Dr. William Nix and Dr. David Stevenson. The French counterpart is Professor P. Moine, Laboratoire de Metallurgie Physique, University of Poitiers. Ion-implementation has become over the past decade a versatile and effective method for the modification of materials properties, including those of metals,semi-conductors, ceramics, composites and polymers. In this project the investigators will carry out a scientific investigation of the ion-assisted coating of stainless steel. The technical goal is to realize a low friction coefficient, high wear and corrosion resistant surface, by using amorphous TiNi combined with BN. The scientific issues addressed will be: 1. The relationship of the coating microstructure with ion-beam processing conditions, by carrying out thorough material characterization on a wide variety of samples. 2. Correlation of the surface properties with the microstructure, with particular attention to adhesion, nano-hardness, friction, wear and corrosion. The Poitiers laboratory is well-equipped for the ion-implantation, secondary ion-mass spectrometry and x-ray characterization, and the tribological property studies. The Stanford group has much experience with cross-section transmission electron microscopy, mechanical properties of thin films and electrochemical corrosion studies. Results of this research should provide 1) new knowledge about the structure, properties and formation mechanisms of novel and promising coatings of stainless steel and 2) improved understanding of ion-assisted coating technology.