Effects of Induction Plasma Spheroidization on Properties of Yttria-Stabilized Zirconia Powders for Thermal Barrier Coating Applications

Peng, Haoran; Yu, Yueguang; Shi, Tianjie; Bai, Botian; Yan, Zheng; Yuan, Kang

doi:10.3390/ma17071518

Materials

2024

DOI: 10.3390/ma17071518

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Effects of Induction Plasma Spheroidization on Properties of Yttria-Stabilized Zirconia Powders for Thermal Barrier Coating Applications

Haoran Peng,

Yueguang Yu,

Tianjie Shi

et al.

Abstract: In this study, the induction plasma spheroidization (IPS) technique was adopted to improve the microstructure and properties of the traditional agglomerated ZrO2-7wt%Y2O3 (YSZ) powders used in thermal barrier coating (TBC) applications. Compared with agglomerated YSZ powders, IPS-treated powder has a more desirable microstructure, and the overall performance of the spray powders for TBC preparation is significantly improved. Specifically, IPS-treated powder has a dense, solid, defect-free, and chemically unifo… Show more

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Cited by 3 publications

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Tensile Properties and Coefficient of Thermal Expansion of Laser Powder Bed Fusion Fabricated IN718‐YSZ Compositionally Graded Composite

Parnaik,

Tiwari,

Chakkravarthy

et al. 2024

Adv Eng Mater

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The microstructure, tensile properties, and thermal expansion characteristics of a laser powder bed fusion (LPBF) manufactured compositionally graded composite with 0.5–8 wt% yttria‐stabilized zirconia (YSZ) reinforced Inconel 718 are investigated. Along the composition gradient, which is perpendicular to the build direction, in all cross sections, the YSZ segregates at the melt‐pool boundaries and the IN718 matrix has randomly oriented equiaxed grains. Cross sections with >2 wt% YSZ contain significant porosity (>2%) and solidification cracks, which reduces their strength and ductility significantly. In the section with 1.5 wt% YSZ, the YS, UTS, and ductility are 819 ± 30, 1008 ± 40, and 7.4 ± 0.4 MPa, which matches well with that of LPBF fabricated YSZ‐free IN718. Dilatometry measurements on sections with 0.5–1.5 wt% YSZ in the temperature range of 25–1200 °C indicate that their coefficient of thermal expansion (CTE) is intermediate to that of IN718 and YSZ. Finally, the variations in CTE with temperature are discussed in detail by considering the microstructural evolution in the composite with changes in temperature.

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Tensile Properties and Coefficient of Thermal Expansion of Laser Powder Bed Fusion Fabricated IN718‐YSZ Compositionally Graded Composite

Parnaik,

Tiwari,

Chakkravarthy

et al. 2024

Adv Eng Mater

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Parametric Analysis of Geometrically Similar ICP Discharges in Argon

Saifutdinov,

Saifutdinova,

Sysoev

et al. 2024

High Energy Chem

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The effect of sintering modes on the crystal lattice parameters and the morphology of the ZrO2–nY2O3 (n = 3–8 mol%) ceramic microstructure components

Kulyk,

Duriagina,

Vasyliv

et al. 2024

Archives of Materials Science and Engineering

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The purpose of this work is to study the effect of sintering modes, especially the sintering temperature, on the crystal lattice parameters and the morphology of the ZrO2–nY2O3 (n = 3–8 mol%) ceramic microstructure components in relation to corresponding fracture micromechanisms.The series of ZrO2–nY2O3 (n = 3–8 mol%) ceramics were sintered in an argon atmosphere at temperatures 1450C, 1500C, 1550C, and 1600C. The cross-sectional surfaces of samples were prepared for microstructure analysis using a grinding and polishing Struers Tegramin machine. Young’s ceramics modulus values were determined using an ultrasonic flaw detector Panametrics EPOCH III 2300. The samples’ density and porosity were determined by the Archimedes’ method. Scanning electron microscopes Hitachi SU3900 and Carl Zeiss EVO-40XVP were used to analyse the microstructure and fracture surface morphology of samples. For estimating chemical compositions in an energy-dispersive X-ray spectroscopy mode, an INCA ENERGY 350 spectrometer was utilized. Microhardness measurement was performed on a NOVOTEST TC-MKB1 microhardness tester. The fracture toughness of the material was estimated using a single-edge notch beam (SENB) test and the Vickers indentation test. Both the flexural strength and SENB tests were performed under three-point bending using a UIT STM 050 test machine. All mechanical tests were carried out in air at a temperature of 20C.Optimal sintering modes for a variety of YSZ ceramic compositions are found, taking into account the combined effect of the sintering temperature and a percentage of Y2O3, which resulted in a specified balance of cubic, tetragonal, and monoclinic zirconia phases, an optimal microstructure features, and the implementation of high-energy fracture micromechanisms responsible for high strength and fracture toughness of YSZ ceramics.To study the behaviour of YSZ ceramics in the operating atmosphere, their microhardness, flexural strength, and fracture toughness should be evaluated under the operating temperature and pressure conditions.Based on the research performed, it is possible to design the microstructure of YSZ ceramic with the necessary physical and mechanical properties to provide high reliability of ceramic products in various industry branches.The balance of cubic, tetragonal, and monoclinic zirconia phases, as well as the crystal lattice parameters change, was determined for YSZ ceramics stabilized with the various amounts of yttria, and it was linked to their mechanical behaviour; the Vickers indentation method and SENB method were used to estimate crack growth resistance of YSZ ceramics, and an appropriate fracture micromechanism was found.

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Effects of Induction Plasma Spheroidization on Properties of Yttria-Stabilized Zirconia Powders for Thermal Barrier Coating Applications

Cited by 3 publications

References 31 publications

Tensile Properties and Coefficient of Thermal Expansion of Laser Powder Bed Fusion Fabricated IN718‐YSZ Compositionally Graded Composite

Tensile Properties and Coefficient of Thermal Expansion of Laser Powder Bed Fusion Fabricated IN718‐YSZ Compositionally Graded Composite

Parametric Analysis of Geometrically Similar ICP Discharges in Argon

The effect of sintering modes on the crystal lattice parameters and the morphology of the ZrO2–nY2O3 (n = 3–8 mol%) ceramic microstructure components

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