Abstract
ABSTRACTThermal barrier coating (TBC) is essential for scramjet structure to protect the metallic structure from melting or developing high stress. In this perspective, a novel TBC system with multiple layers of ceramics: top layer, intermediate layer, bond coat over a suitable metal substrate has been proposed. First, material selection for TBC system has been carried out based on their thermal conductivity and maximum operational temperature. Then, an elaborate design methodology has been evolved to constrain the temperature of each layer within their operational limit and minimization of thermal mismatch. Different design parameters have been identified and iterative finite element based thermo-structural analyses have been carried out to optimize them and hence, limit metal substrate temperature within 1250 K and the maximum interfacial shear stress within 80 MPa, when exposed to heat flux as high as 1.5 MW/m2 and pressure greater than 1.3 bars.
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
