Properties of plasma sprayed La2Zr2O7 coating fabricated from powder synthesized by a single-step solution combustion method

Aruna, S.T.; Sanjeeviraja, C.; Balaji, N.; Manikandanath, NT

doi:10.1016/j.surfcoat.2013.01.016

Cited by 33 publications

(13 citation statements)

References 42 publications

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“…Furthermore, a sharp endothermic peak observed at 250 o (region 2) can C be assigned due to decomposition of residual nitrates and decomposition of the fuel liberating CO 2 [51]. The presence of a weak exothermic peak observed at 450 ºC is unknown, as La 2 Zr 2 O 7 crystallizes beyond 700 ºC [52]. A significant weight loss is observed in the region 3 between (500 and 650 ºC) with onset of endothermic peak at around 600 ºC suggesting growth of LLZO phase.…”

Section: Effect Of Fuel To Oxidizer Ratio On Morphology Phase Purity and Formation Mechanismmentioning

confidence: 99%

Facile synthesis of Al-stabilized lithium garnets by a solution-combustion technique for all solid-state batteries

et al. 2021

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Section: Effect Of Fuel To Oxidizer Ratio On Morphology Phase Purity and Formation Mechanismmentioning

confidence: 99%

Facile synthesis of Al-stabilized lithium garnets by a solution-combustion technique for all solid-state batteries

et al. 2021

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“…It is worthy to note that the formation of the La 2 Zr 2 O 7 secondary phase with a pyrochlore structure results in a significant suppression of densification. La 2 Zr 2 O 7 pyrochlore was proposed as a promising TBC material; [2,6,7] therefore, its properties and stability in thermal cycling were investigated. Moreover, according to experimental data, the phase stability of singly doped zirconia at a constant dopant concentration (7.6%) shows a strong dependence on the cation size, being optimal for Yb and Y, and declining both for larger and smaller cations.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Phase Relations in the ZrO2-La2O3-Yb2O3 System

Ilatovskaia

Sun

Saenko

et al. 2020

J. Phase Equilib. Diffus.

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The phase equilibria in the La 2 O 3-Yb 2 O 3 system were investigated using differential thermal analysis, and the phase transformations temperatures were verified. Microstructure investigation using scanning electron microscopy confirmed the presence of eutectoid reactions in the system. The heat capacity of LaYbO 3 with a perovskite structure was measured in the temperature range from 250 to 1250 K using differential scanning calorimetry. The experimental results of the present work as well as reliable literature data were used to derive a thermodynamic description of the La 2 O 3-Yb 2 O 3 system. Isothermal sections of the ZrO 2-La 2 O 3-Yb 2 O 3 system were constructed based on x-ray and microstructural investigations. The tie-lines change from Pyrochlore ? Yb 2 O 3 C to LaYbO 3 Perovskite ? Fluorite was explained by a solidstate reaction occurring in the range between 1673 and 1873 K. The heat effect observed at 1858 K using DTA confirms the phase transformation, and its temperature was established more precisely at 1808 ± 15 K using stepwise heat treatment. Keywords CALPHAD Á La 2 O 3-Yb 2 O 3 system Á phase diagram Á solid state reaction Á ZrO 2-based system This invited article is part of a special tribute issue of the

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“…However, its phase transformation and sintering result in a poor performance when the service temperature exceeds 1200 ℃ [4]. Therefore, in recent years, many researchers developed rare-earth doped zirconia and zirconate TBCs, such as ScGdSZ [5], La 2 Zr 2 O 7 [6,7], and Gd 2 Zr 2 O 7 [8][9][10][11][12][13]. Zhang et al [14] systematically investigated the thermophysical properties of Yb 2 O 3 doped Gd 2 Zr 2 O 7 and obtained many interesting results.…”

Section: Introductionmentioning

confidence: 99%

Bending fracture behavior of freestanding (Gd0.9Yb0.1)2Zr2O7 coatings by using digital image correlation and FEM simulation with 3D geometrical reconstruction

Mao¹,

Wang²,

Shi³

et al. 2019

J Adv Ceram

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It is important to investigate the mechanical performances of (Gd 0.9 Yb 0.1 ) 2 Zr 2 O 7 (GYbZ) materials deposited on irregular substrates for improving new thermal barrier coatings. Three-point bending fracture characteristics of freestanding GYbZ coating prepared by supersonic plasma sprayed (SPS) technique were investigated with the help of digital image correlation technique. The cracking time, crack propagation path, and mechanical properties of GYbZ coating were obtained. Meanwhile, the X-ray computed tomography technique was introduced to scan the microstructure of freestanding GYbZ coatings, which are used to establish three-dimensional (3D) finite element model by using the Avizo software. The brittle cracking criterion was applied to describe the bending fracture process of GYbZ coatings. The critical cracking strain was estimated as 0.36%±0.03% by repeatedly comparing the difference between the experimental and simulated curves. The results would be extended to predict the dangerous region and failure mechanisms of GYbZ coatings deposited on irregular substrate during finite element simulations.

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Properties of plasma sprayed La2Zr2O7 coating fabricated from powder synthesized by a single-step solution combustion method

Cited by 33 publications

References 42 publications

Facile synthesis of Al-stabilized lithium garnets by a solution-combustion technique for all solid-state batteries

Facile synthesis of Al-stabilized lithium garnets by a solution-combustion technique for all solid-state batteries

Experimental Investigation of Phase Relations in the ZrO2-La2O3-Yb2O3 System

Bending fracture behavior of freestanding (Gd0.9Yb0.1)2Zr2O7 coatings by using digital image correlation and FEM simulation with 3D geometrical reconstruction

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