Thermal properties and phase stability of Yttria-Stabilized Zirconia (YSZ) coating deposited by Air Plasma Spray onto a Ni-base superalloy

Zambrano, Darío; Barrios, Augusto Cesar; Tobón, Luis; Serna, Carlos Mario; Gómez, Pablo Andrés; Osorio, Julián D.; Toro, A.

doi:10.1016/j.ceramint.2017.11.109

Cited by 21 publications

(12 citation statements)

References 43 publications

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“…Usually, tetragonal structure is not used due to low phase stability. Meanwhile, cubic phase owing to its high crystallinity is very useful as ionic conductors in SOFCs [10,11]. The ionic conductivity performance of the deposited YSZTFs has been shown to depend on the types of phases' formed, surface microstructure and film thickness.…”

Section: Introductionmentioning

confidence: 99%

Annealing temperature induced improved crystallinity of YSZ thin film

Rusli

Muhammad

Ghoshal

et al. 2020

Mater. Res. Express

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Six YSZ thin films (YSZTFs) were prepared at varied annealing temperature (380°C to 600°C) by radio frequency magnetron sputtering method. Glancing angle x-ray diffraction (GAXRD) pattern revealed the polycrystalline nature of all films with crystallite size in the range of 9 to 15 nm. Sample annealed at 400°C displayed the lowest microstrain (0.262) and crystallinity (60%). FESEM images disclosed dense, homogeneous and crack free growth of annealed samples compared to as-deposited one. EDX spectra detected the right elemental compositions of films. AFM images showed growth evolution of YSZ grains with size range between 0.2 to 5 nm and improved films' surface roughness. HRTEM measurement of the studied YSZTFs exhibited lattice orientation and atomic structure of nucleated YSZ nanocrystallites. Furthermore, film annealed at 500°C divulged less oriented structure because of dislocation.

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Section: Introductionmentioning

confidence: 99%

Annealing temperature induced improved crystallinity of YSZ thin film

Rusli

Muhammad

Ghoshal

et al. 2020

Mater. Res. Express

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“…The microstructure of the cross-section of the coated samples after 150 cycles of thermal shock test reveals the changes in the microstructure that took place as a result of the test compared to the as sprayed microstructure see Figure 7. The voids and pores in the top coat shown in the as sprayed conditions almost disappeared due to sintering effect because of thermal exposure which increase the thermal conductivity of the coating [46,47]. Figure 7 also shows interfacial voids between the top and bond coats.…”

Section: Thermal Shock Resistancementioning

confidence: 96%

Thermal shock resistance of yttrium aluminium oxide Y3Al5O12 thermal barrier coating for titanium alloy

Almomani¹,

Al‐Widyan²,

Mohaidat³

2020

JMES

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The high strength-to- weight ratio of titanium alloys allows their use in jet engines. However, their use is restricted by susceptibility to oxidation at high temperatures. In this study, the possibility of increasing the operating temperature of titanium alloys through using Yttrium Aluminum Oxide (YAG) as a thermal barrier coating material for Ti-6Al-4V substrate is studied. The study concludes that YAG can be utilized to increase the operating temperature of Ti-6Al-4V titanium alloy from around 350 °C to 800 °C due to its low thermal conductivity and phase stability up to its melting point. In addition, its lower oxygen diffusivity in comparison with the standard YSZ material will provide a better protection of the titanium substrate from oxidation. In this work, coating was created using atmospheric plasma spray. X-ray Diffraction (XRD) and Scanning Electron Microscope (SEM) were used to examine coatings' composition and structure. The coating was characterized by thermal shock test, Vickers hardness test and adhesion strength test. X-ray diffraction indicated that the coating was of a partially crystalline Y3Al5O12 composition. The coating was porous with excellent thermal shock resistance at 800 oC, with a Vickers micro-hardness of 331.35 HV and adhesion strength of 17.6 MPa.

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“…Polycrystalline yttria stabilized zirconia (YSZ) is broadly recognized as one of the most useful high temperature structural materials due to its ionic conducting properties [19], high-temperature stability [20], record toughness [21], and proven biocompatibility [22]. While these properties make YSZ a promising material for extreme integrated photonic applications, it is still not in general recognized as an optical material, since most fabrication processes lead to optically opaque YSZ.…”

Section: Introductionmentioning

confidence: 99%

Thermally Resilient Planar Waveguides in Novel nc-YSZ Transparent Ceramic by fs Laser Pulses

et al. 2021

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We report on thermally resilient planar waveguides fabricated on nc-YSZ by direct fs-laser inscription in transparent nc-yttria stabilized zirconia (nc-YSZ) polycrystalline ceramic. The waveguides consisted of rectangular sections (4.5 × 2 mm2) on the surface of the sample. Optical characterization at 633 and 810 nm was performed. We estimate a laser-induced refractive index contrast of 10–4. Post-waveguide-fabrication thermal annealing treatments at 750°C for 24 h were carried out to test the resilience of the waveguides and to further reduce the waveguide losses. Both micro-Raman spectroscopy and XPS characterization revealed unmodified lattice and steady chemical features, which are consistent with the waveguide thermal resilience. Our results suggest a promising potential use of nc-YSZ in harsh and high temperature demanding photonic environments.

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Thermal properties and phase stability of Yttria-Stabilized Zirconia (YSZ) coating deposited by Air Plasma Spray onto a Ni-base superalloy

Cited by 21 publications

References 43 publications

Annealing temperature induced improved crystallinity of YSZ thin film

Annealing temperature induced improved crystallinity of YSZ thin film

Thermal shock resistance of yttrium aluminium oxide Y3Al5O12 thermal barrier coating for titanium alloy

Thermally Resilient Planar Waveguides in Novel nc-YSZ Transparent Ceramic by fs Laser Pulses

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