Applications of thermal analytic techniques in materials engineering.

摘要

This thesis studies the applicability of thermal analysis techniques to the task of determining thermal characteristics of various materials. An extensive investigation was conducted through an experimental program which featured the use of differential scanning calorimetry (DSC), differential thermal analysis (DTA), dilatometry, and thermomechanical analysis (TMA).;Differential scanning calorimetry (DSC) was employed to measure heat capacities of coal ashes in the temperature range from 150;The minimum sintering temperature of coal ash powder was measured using a high temperature, push-rod dilatometer over the range from ambient to 1250;The applicability of differential thermal analysis (DTA) to determine the fusibility behavior of coal ashes was investigated between 300;Thermomechanical analysis (TMA) and differential scanning calorimetry (DSC) was employed to study the effect of polyethylene terephthalate (PET) additives obtained from used soda bottles on the thermal properties of pure asphalt. This technique was used to determined the expansion coefficient, the glass transition temperature, the melting point, and the flow properties of asphalt, PET, and PET/asphalt mixtures samples. The temperature range used for these measurements was between 100;This thesis features a variety of useful applications of analytic thermal techniques and is intended to enhance our knowledge of existing methods and explore new techniques to determine thermal properties of different materials in materials engineering applications.