首页|On the correlative microscopy analyses of nano-twinned domains in 2 mol% zirconia alloyed yttrium tantalate thermal barrier material
On the correlative microscopy analyses of nano-twinned domains in 2 mol% zirconia alloyed yttrium tantalate thermal barrier material
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NSTL
Elsevier
? 2022 Acta Materialia Inc.Formation of nano-twinned domains associated with ferro-elastic transformation in 2 mol.% ZrO2 alloyed YTaO4 has been investigated using a correlative microscopy approach. Transmission Kikuchi diffraction reveals the presence of two phases, monoclinic (M) and tetragonal (T) in the material sintered at 1485 °C for 3 hr. The microstructure comprises of alternate nano-twinned domains with an average spacing of 154.07 ± 42.52 nm. Crystallographic symmetry based spontaneous strain analyses support the observation of single domain state. Ab-initio calculations further indicate the propensity of stabilizing both M and T phases at room temperature as a function of ZrO2 alloying, without any change in chemical composition, as is evidenced by atom probe tomography.
atom probe tomographyCorrelative microscopyFerroelastic transformationNanotwinstransmission Kikuchi diffraction
Gururaj K.、Saha M.、Nama R.、Ponnuchamy M.B.、Pradeep K.G.、Maurya S.K.、Alankar A.
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Correlative Microscopy Laboratory Department of Metallurgical and Materials Engineering Indian Institute of Technology Madras
Department of Mechanical Engineering Indian Institute of Technology Bombay
NSTL
Elsevier
