PDF Publication Title:
Text from PDF Page: 092
CHAPTER 7 CONCLUSIONS AND SUGGESTED FUTURE WORK operating surface temperature of jet engines turbines. Hence, when the engine is in operation, these reaction products will block the pathway of CMAS penetration. In order to understand more of the reaction of volcanic ash and alumina, DTA and XRD analysis had been carried out. It has been found that by mixing alumina, the melting point of volcanic ash was increased from 1235 °C to 1310 °C. In addition, anorthite (CaAl2Si2O8), magnetite (Fe3O4), and spinel (Al1.75Mg0.889Mn0.351O4) were found after heat treatment as reaction products, which correspond to the penetration experiment. For the protective coatings, YSZ and alumina coatings have been made using sol-gel based spray coating method. For both YSZ and Al2O3 coatings, adhesion is a big problem, which needs to be improved. During the thermal exposure, columnar gaps in YSZ top coat would extend accompanied with the thermal expansion of the superalloy substrate. Thus, different level of thermal expansion broke the structure of protective coatings on TBCs. 7.2 SuggestedFuturework I. New TBCs design against volcanic ash According to previous experiments, thermal expansion mismatch is a big problem for protective coatings and leads the spallation of protective coatings after thermal cycles. Thus, new techniques against CMAS need to be developed. Page 91PDF Image | Volcanic Ash Degradation on Thermal Barrier Coatings
PDF Search Title:
Volcanic Ash Degradation on Thermal Barrier CoatingsOriginal File Name Searched:
vocanic-ash-degradation.pdfDIY PDF Search: Google It | Yahoo | Bing
Sulfur Deposition on Carbon Nanofibers using Supercritical CO2 Sulfur Deposition on Carbon Nanofibers using Supercritical CO2. Gamma sulfur also known as mother of pearl sulfur and nacreous sulfur... More Info
CO2 Organic Rankine Cycle Experimenter Platform The supercritical CO2 phase change system is both a heat pump and organic rankine cycle which can be used for those purposes and as a supercritical extractor for advanced subcritical and supercritical extraction technology. Uses include producing nanoparticles, precious metal CO2 extraction, lithium battery recycling, and other applications... More Info
CONTACT TEL: 608-238-6001 Email: greg@infinityturbine.com (Standard Web Page)