PDF Publication Title:
Text from PDF Page: 060
CHAPTER 4 VOLCANIC ASH AND ITS PENETRATION MECHNISMS IN TBCS SEM image of volcanic ash penetration into TBC top coat after exposed at 1250 °C for 3 hours is shown in Figure 4.15. It can be seen that volcanic ash penetrated into YSZ columnar gaps and pores, and great amount of volcanic ash was found at the bottom of YSZ top coat. In addition, spallation of TBC top coat was found in some part of the interface of top coat and TGO. It is believed that the aggregation of volcanic ash at the bottom of top coat might have caused the degradation of coating adherence and accelerated the spallation of TBC. Figure 4.15 SEM image of volcanic ash attack on TBC after 3 hours heat treatment at 1250 °C Figure 4.16 shows the cross-sectional microstructure of the volcanic ash penetrated TBC heat treated at 1250 °C for 10 hours. It was also noticed that considerable amount of volcanic ash was concentrated near the bottom of YSZ top coat which would eventually lead to the delamination of the top coat. However, unlike the CMAS attack on TBCs [40,42], there is no molten volcanic ash glass stayed inside of YSZ columnar pores. Referring to the EDX point analysis shown Page 59PDF 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)