Design and Properties of Films, Coatings and Brittle Materials: A Combined Education and Research Program

薄膜、涂层和脆性材料的设计和性能：教育与研究相结合的项目

• 批准号: 9625293
• 负责人: Ivar Reimanis
• 金额: $ 25.33万
• 依托单位: Colorado School of Mines
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-06-01 至 2001-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9625293&HistoricalAwards=false
• 关键词: Design; Properties; Films; Coatings; Brittle

9625293 Reimanis A coordinated teaching and research program that targets several national critical needs in the semiconductor and the structural ceramics industries will be implemented. The educational component will emphasize materials selection in design and will develop the integration of computer-based design and/or numerical modeling into several undergraduate classes in materials science. The research aspect of the program will examine relationships between the residual stress distribution and the fracture behavior in graded composites. Graded composites represent a new class of materials in the sense that many of their properties can not be predicted with existing scientific models. One of the P.I.'s long term goals is to develop some of these models. The effect of the size scale of the microstructure relative to gradation on mechanical properties will be examined by synthesizing composites with different graded layer thicknesses and different gradation architectures employing vapor deposition, and powder metallurgy. Both thermal and mechanical loading will be used to examine failure mechanisms. Crack trajectories will be observed so that fracture criteria may be developed. %%% The proposed research plan of this CAREER proposal is to develop an understanding of the failure mechanisms in metal/ceramic composites and coatings that are compositionally graded. Understanding these mechanisms will enable materials engineers to design better advanced materials for the automotive and aerospace industries. ***

9625293 Reimanis 将实施一项协调的教学和研究计划，该计划针对半导体和结构陶瓷行业的几个国家关键需求。 教育部分将强调设计中的材料选择，并将基于计算机的设计和/或数值建模整合到材料科学的几个本科课程中。 该计划的研究方面将检查梯度复合材料中残余应力分布和断裂行为之间的关系。梯度复合材料代表了一类新型材料，因为它们的许多特性无法用现有的科学模型预测。 P.I. 的长期目标之一是开发其中一些模型。 将通过采用气相沉积和粉末冶金合成具有不同梯度层厚度和不同梯度结构的复合材料来检查相对于梯度的微观结构的尺寸尺度对机械性能的影响。热载荷和机械载荷都将用于检查失效机制。将观察裂纹轨迹，以便制定断裂标准。 %%% 本职业提案的拟议研究计划是加深对成分分级的金属/陶瓷复合材料和涂层失效机制的理解。 了解这些机制将使材料工程师能够为汽车和航空航天工业设计更好的先进材料。 ***