Abstract
Properties of thermal barrier coating (TBC) prepared from 3 wt.% yttria doped zirconia (YDZ) dispersed in a high temperature resistant alumino-borosilicate glassy phase in the system AO–B 2O–C 2O 3–DO 2 (where A=Ca, Mg, Ba; B=Na, K; C=Al; and D=Si) have been studied. The resultant coating compositions have been applied with good adherence on stainless steel (AISI-310) by simple and cost effective enameling technique. The thermal gradient of TBC with coating thickness of about 800 μm has been found to be within 175–180°C when it was exposed at 1000°C for 30 min. A significant improvement of the gradient to 650–675°C has been observed with a long exposure of coated surface at a temperature of 1000°C aided by a cooling system made of continuous flow of compressed air. Evaluation, characterisation, and microstructure studies have been reported in this paper.
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