PDF Publication Title:
Text from PDF Page: 028
CHAPTER 2 LITERATURE REVIEW mitigates the stress from thermal expansion mismatch [21]. Also, EB-PVD top coat provides better in erosion resistance. Compared with the fracture which happens through the splat boundaries on APS top coat, fracture only occurs in the surface region of columnar EB-PVD top coat structure [19]. However, compared with their thermal conductivity, APS top coat offers better thermal insulation [22]. In general, EB-PVD top coat is still the more popular coating technique for the jet engine turbine blades. 2.1.3 Bond Coat For the state-of-the-art nickel-based superalloy, the formation of protective alumina layer is difficult because the component of aluminium is not rich enough inside of the superalloy. Thus, applying an aluminium rich layer on top of the superalloy substrate is beneficial. For TBC industry, there are two major types of bond coat, which are overlay bond coat (i.e. MCrAlX) and diffusion bond coat (i.e. PtNiAl). Overlay bond coat: Overlay bond coat is made by low-pressure plasma spraying and it is made from two phases, β-NiAl and γ+γ’ bond. For its composition, it could be written as MCrAlX. The notation M represents Ni or the combination of Ni and Co, while X is the reactive element such as yttrium and zirconium with concentration lower than 10 ppm and made to improve the adhesion of alumina scale by gettering the sulphur [24,25]. Also, the compositions between the overlay bond coat and the Page 27PDF 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 | RSS | AMP |