Synthesis and Properties of Intelligent/Smart Ceramics and Ceramic Composites

该提案概述了压电现象在陶瓷和陶瓷复合材料中的两种新颖但“智能”的应用。一种是利用压电效应来检测整体陶瓷和陶瓷复合材料中的应力和裂纹。它还可以防止由于压电产生的压缩力而导致的裂纹和裂纹扩展。另一种应用是利用压电效应在纤维-基体界面上产生压缩或拉伸力，以改变陶瓷复合材料中纤维-基体界面的剪切强度。采用特殊的带状铸造和层压技术制备单片BaTiO3陶瓷和单轴增强蓝宝石纤维BaTiO3基复合材料。该计划将提供对“智能”陶瓷和陶瓷基复合材料及其性能的合成的基本理解。%%%%本节目概述了压电现象在陶瓷和陶瓷基复合材料中的两种“智能”应用。一种是利用压电效应来检测应力和裂纹，并利用压电产生的力来防止裂纹和裂纹扩展。另一种是利用这种效应在纤维-基质界面上产生力，并通过它们来改变剪切强度。采用特殊的带状铸造和层压技术制备BaTiO3陶瓷和单轴增强蓝宝石纤维BaTiO3基复合材料。本研究将对“智能”陶瓷和陶瓷基复合材料的合成及其性能提供基本的认识。潜在的商业应用可以是巨大的，广泛的进入许多工业部门。

This proposal outlined two novel but "intelligent" applications of the piezoelectric phenomena in ceramics and ceramic composites. One utilizes the piezoelectric effect in the detection of stresses and cracks in monlithic ceramics and ceramic composites. It will also prevent cracking and crack growth as a result of the piezoelectrically generated compressive forces. the other application utilizes the piezoelectric effect to produce forces, either compressive or tensile, on fiber-matrix interfaces in order to modify the fiber-matrix interfacial shear strenths in the ceramic composites. Special tape-casting and laminating technique will be used to produce the monolithic BaTiO3 ceramics and the uniaxially-reinforced sapphire fiber BaTiO3 matrix composites. This proposed program will provide fundamental understanding of the synthesis of "intelligent" ceramics and ceramic matrix composites and their properties. %%%% This program outlined two "intelligent" applications of the piezoelectric phenomena in ceramics and ceramic matrix composites. One uses the piezoelectric effect to detect stresses and cracks and to use the piezoelectrically generated forces to prevent cracking and crack growth. The other uses the effect to produce forces on the fiber-matrix interfaces and to modify shear strengths through them. Special tape-casting and laminating technique will be used to produce the BaTiO3 ceramics and uniaxially-reienforced sapphire fiber BaTiO3 matrix composites. This study will provide fundamental understanding of the synthesis and "intelligent" ceramics and ceramic matrix composites and their properties. Potential commercial applications can be enormous and wide-ranged into many industrial sectors.