A Kinetics-Based Investigation of the Hall-Petch Effect and Solid Solution Strengthening in Refractory Metal Coatings

基于动力学的难熔金属涂层中霍尔-佩蚀效应和固溶强化研究

• 批准号: 9317479
• 负责人: Donald Stone
• 金额: $ 26.5万
• 依托单位: University of Wisconsin-Madison
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-05-01 至 1998-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9317479&HistoricalAwards=false
• 关键词: Kinetics; Based; Investigation; Hall; Petch

9317479 Stone Strengthening mechanisms in molybdenum and tantalum/nitrogen thin films are explored using unique indentation apparatus. The film compositions are selected as model systems to examine solid solution strengthening and the Hall-Petch effect. Film thicknesses on the order of 2 to 5 microns are deposited on hard substrates. Emphasis is placed on determining the effects of indentation rate and temperature on the hardness, as a function of grain size, alloy content, and structure form. The kinetics of plastic deformation are characterized by load and depth sensing techniques and wafer curvature stress measurements. Results should permit a determination of how well laws governing the kinetics of deformation in bulk materials relate to behavior in thin films. %%% The research will provide an improved understanding of deformation phenomena in hard coatings. This knowledge can lead to new strategies for depositing thin films to achieve improved properties. ***

小行星9317479 利用独特的压痕装置研究了钼和钽/氮薄膜的强化机理。 薄膜组成被选为模型系统，以检查固溶体强化和Hall-Petch效应。 在硬基底上沉积2至5微米量级的膜厚度。 重点放在确定压痕速率和温度对硬度的影响，作为晶粒尺寸，合金含量和组织形式的函数。 塑性变形的动力学特征在于负载和深度传感技术和晶片曲率应力测量。 结果应允许确定如何以及法律管理的动力学变形在散装材料有关的行为在薄膜。 %这项研究将提供一个更好的理解在硬涂层的变形现象。 这一知识可以导致新的战略，沉积薄膜，以实现改善的性能。 ***