Processing of Novel Particulate Composite Materials Using Cenospheres and Characterization of Their Mechanical and Thermal Properties

这项建议旨在利用空心微珠在聚合物或水泥基质中开发新型颗粒复合材料，并对其力学(本构和断裂)和热性能进行表征。从火力发电厂的飞灰中回收的空心微珠价格低廉，按照本提案的设想以科学的方式使用它们将节省材料，并减少与其在垃圾填埋场处置相关的环境问题。将为聚合物和水泥基质开发一套制备这些复合材料的综合工艺方案。空心陶瓷微珠非常适合于制造轻质材料，并将详细研究微珠的含量、大小及其在基质中的分布对所得到的材料性能的影响。将研究合适的空心球表面处理以调整空心球-基质界面的相互作用，并研究这种界面定制对材料性能的影响。在这些研究的基础上，将开发出合适的空心球复合材料的设计和合成模型。研究结果还将为基于连续介质理论或细观力学理论的特定复合材料本构失效模型的建立和评价提供基础。将空心球的特性与连续基质赋予的特性相结合的协同效应可被用于一系列应用，包括轻质抗冲击和吸能材料和结构、用于建造船只和土木结构的高比强度材料以及轻质隔热材料。

This proposal aims at developing novel particulate composites using cenospheres in a polymer or cement matrix and characterizing their mechanical (constitutive and fracture) and thermal properties. Cenospheres being reclaimed product from the fly ash of the thermal power plants, are inexpensive and their use in a scientific manner as envisaged in this proposal would result in material conservation and also reduce environmental problems asociated with their disposal in landfills. A comprehensive processing scheme for preparing these composites will be developed for both the polymer and cement matrices. The hollow ceramic cenospheres are ideally suited to make light weight material and, the effect of the cenosphere content, size and their distribution in the matrix on the resulting material properties will be investigated in detailed. Suitable cenosphere surface treatments will be investigated to tailor the interaction at the cenosphere-matrix interface and the effect of such interface customization on the material properties will be studied. Based on these investigations, suitable models for design and synthesis of cenosphere composites will be developed. The results will also provide a basic for developing and valading constitutiive failure models based on continuum or micromechanical theories for particular composites. The synergiistic effect of combining cenosphere characteristics with those imparted by the continuous matrix can be exploited for a range of applications, including light weight impact resistant and energy absorbing materials and structures, high specific strength materialss for construction of boats and civil structures and light weight thermal insulation materials.***