PREPARATION AND CHARACTERIZATION OF LANTHANUM AND SAMARIUM ZIRCONATE POWDERS FOR TBC APPLICATION
Keywords:
Thermal Barrier Coating, Zirconate Phase, Powder Preparation by Agate Method, Wet Ball Milling Method, XRD, EDAXAbstract
In this present research work, Sm2O3 and La2O3 have been used as the dopant or stabilizer to Zirconia powder as a candidate for TBC. Various characterization tests have been conducted such as XRD, EDAX, and Particle Sizes etc. to optimize and determine the dopant concentration for partial or full stabilization of Zirconia. And to study the effect of stabilization of Zirconia, two methods have been followed: 1. Powder preparation by Agate jar mixing. 2. Powder preparation by planetary high-energy wet ball mill method. In the first and second methods, we have studied stabilization of Zirconate by phase transformation at various sintering temperatures using XRD and chemical compositions of lanthanum and samarium zirconate powders using EDAX analysis, after calcinated for various temperatures. From the first method, stabilization of Zirconia is very less due to higher particle size and higher calcination temperature of 16250C. From the second method stabilized zirconate formed due to smaller particles size and optimum calcinations temperature of 14350C
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