FGM Materials and Finding an Appropriate Model for the Thermal Conductivity

AbstractProducing of materials with high mechanical strength and thermal stress resistance is required for the development and optimization of the mechanical and structural parts in some special conditions. Functionally graded materials (FGM) are new generations of the composite materials having non homogeneous microscopic microstructures in which the material properties are changed along with the continuous and synchronized distributions of the structural combination. Due to attention to the development of FGM materials applications in the high-technology industries and sciences, it's required to investigate and study the methods of producing these materials. Hence, the investigation of the advantages and disadvantages of different methods, comparing the methods with each other, introducing the optimum methods for producing different combinations of FGM and properties investigation of each specified combination should be carried out. In this study, a précised investigation of the whole available production methods was done and then with considering the field of every special application, a suitable FGM combination was selected. One of the best methods in the aspect of quality, manufacturing speed and cost was selected in order to account for producing in the laboratorial scale and the mechanical and thermal tests. Then, the changes of the thermal conductivity through the main dimension were investigated. The mathematical model for the conductivity changes was proposed for an optimum structure. Also, the obtained model was generally compared with some results of the previous researches