Study of Mechanical Vibration Energy Damping Properties of Carbon Fiber Reinforced Composite Filled with Ferroelectrics

铁电体填充碳纤维增强复合材料机械振动能量阻尼性能研究

基本信息

批准号：
09450250
负责人：
SUMITA Masao
金额：
$ 6.27万
依托单位：
Tokyo Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

项目摘要

New polymeric composites filled with piezoelectric, and electrical conductive particles, PZT/LDPB/CB, were made. The damping mechanism of the material is unique one, i.e.,the applied vibrational energy is first transformed into electric energy by the piezoelectric effect of the piezoelectric particle and the electric energy is further transformed into Joule's heat due to the current through the electrical conductive network which was formed by the electrical conductive particles. It was found that three factors effect their damping efficiencies, i.e., (1) acoustic impedance (2)electro mechanical coupling factor (3) resistivity. BaTiO3/LDPE/VGCF composites have prominent damping properties in the crystalline dispersion region, on the other hand, BaTio3/CPE/VGCF composites show better damping effect in the room temperature region due to interactions between CPE and BaTiO3. From the results of the relationships between optimum resistivity and domain size of piezoelectric particles which has most effective damping effect in the polymerc matrix, organic dispersion type dielectrics, such as DZ,BPSR, were found to have better damping properties in the composites. The damping properties of this organic hybrid material depends on its phase structure formed by interactions between matrices and dielectrics. Hydrogen bond is one of the most important interactions of this hybrid systems. The damping factor is increased with decrease of the size of dielecrics. The organic hybrid material filled with VGCF can be a new material which has high modulus and high damping properties.

制作了充满压电的新聚合物复合材料，并制造了导电颗粒PZT/LDPB/CB。该材料的阻尼机制是独特的，即，通过压电颗粒的压电效应将应用的振动能首先转化为电能，并且由于电力网络通过电力网络而形成的电流，因此电能进一步转化为Joule的热量，这是由电力导电粒子形成的。发现三个因素会影响其阻尼效率，即（1）声阻抗（2）电动耦合因子（3）电阻率。 BATIO3/LDPE/VGCF复合材料在晶体分散区域具有显着的阻尼特性，另一方面，由于CPE和Batio3之间的相互作用，BATIO3/CPE/VGCF复合材料在室温区域显示出更好的阻尼区域。从最佳电阻率和压电颗粒的结构域大小之间的关系中，发现在polymerc基质中具有最有效的阻尼效果，有机分散型介电介质（例如DZ，BPSR）在复合材料中具有更好的阻尼特性。这种有机杂交材料的阻尼特性取决于其相结构，该相结构是由矩阵与介电之间的相互作用形成的。氢键是该混合系统最重要的相互作用之一。阻尼因子随着二环的大小而增加。充满VGCF的有机混合材料可以是具有高模量和高阻尼特性的新材料。