Impacting testing of high temperature ceramics through the use of a vitiated heater for hot and cold fire collisions
Material testing is a crucial step during the design process as particular materials serve as safety and life saving conditions. In this study, a MoSi 2 is chosen as the target specimen to undergo impact under high temperatures. An impact apparatus is designed and constructed for the purpose of propelling alumina particles at high velocities. A nozzle using compressed nitrogen gas is used to fire the particle at the desired velocities. Due to the possibility of thermal shock occurring at higher temperatures, a separate nozzle utilizing vitiation heating is designed to fire the particle at equally higher temperatures to prove the lack of thermal shock. Throughout the experiment, measurements including particle velocity, exit temperature, specimen temperature, and damage of the specimen are documented in both the cold test nozzle and vitiated heating test nozzle. Ultimately, the design of the impact apparatus is such that it may used as a characterization tool. Although the final results focus on the characterization of the MoSi 2 specimen and the damage associated, the impact apparatus may be used to characterize materials at any temperature application and is not limited to characterizing ceramics.
Mechanical engineering|Materials science
Trejo, Adrian, "Impacting testing of high temperature ceramics through the use of a vitiated heater for hot and cold fire collisions" (2009). ETD Collection for University of Texas, El Paso. AAI1473895.