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

小行星9625293 将实施一个针对半导体和结构陶瓷行业几个国家关键需求的协调教学和研究计划。 教育部分将强调设计中的材料选择，并将开发基于计算机的设计和/或数值建模集成到材料科学的几个本科课程中。 该计划的研究方面将研究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的材料，因为它们的许多性能无法用现有的科学模型预测。其中一个私家侦探的长期目标是开发其中的一些模型。 将通过采用气相沉积和粉末冶金合成具有不同分级层厚度和不同分级结构的复合材料来检查相对于分级的微观结构的尺寸尺度对机械性能的影响。热载荷和机械载荷将用于检查失效机制。将观察裂纹轨迹，以便制定断裂准则。 本CAREER提案的拟议研究计划是了解金属/陶瓷复合材料和成分分级涂层的失效机制。 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。 ***

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. ***