Synthesis of porous yttria-stabilized zirconia microspheres by ultrasonic spray pyrolysis

Pérez-Page, María; Guzalowski, Ryan; Muche, Dereck N.F.; Castro, Ricardo H. R.; Stroeve, Pieter

doi:10.1016/j.matlet.2016.10.082

Cited by 5 publications

(4 citation statements)

References 14 publications

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“…On the other hand, the powders must be granule grains, so the temperature should be sufficient to improve the agglomeration. Perez-Page et al investigated yttria stabilized zirconia powders with the USP system for temperatures between 700 °C and 1200 °C and revealed that these powders were crystallized at 700 °C temperature and the crystallization increased depending on the increase in reactor temperature [29]. In our present study, the selected reactor temperature was relatively low.…”

Section: Properties Of Usp Granule Particlesmentioning

confidence: 51%

Rapid processes for the production of nanocrystal yttria-stabilized tetragonal zirconia polycrystalline ceramics: ultrasonic spray pyrolysis synthesis and high-frequency induction sintering

KOÇ,

ŞAN

2023

Journal of Scientific Reports-A

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In this study, nanocrystalline 3 mol % yttria-stabilized tetragonal zirconia polycrystalline (Y-TZP) ceramic was produced by sintering with a high-frequency induction heating (HFIH) system of granular powders obtained by ultrasonic spray pyrolysis (USP) at 600 °C. The granular nano-sized powders (10-30 nm) were micron in size (average size: 700 nm), spherical in shape and amorphous. The influences of the HFIH sintering temperature (1400-1600 °C), applied current time (60-300 sec.) and the mechanical pressure (10 MPa and 20 MPa) on the final density and grain size of the products were investigated. The amorphous granular Y-TZP powders compressed with the HFIH system allow very rapid condensation in the tetragonal phase at high density and avoid grain growth. High density (relative density over 95) nanocrystalline Y-TZP ceramic with ∼70 nm size could be obtained from the simultaneous application of 20 MPa pressure and an induced current within 300 sec. of sintering time at 1500 °C. In this condition, the sample’s maximum hardness and fracture toughness values were reached at 14.9 GPa and 3.8 MPa·m1/2, respectively. Y-TZP powders produced in nano-micro structure with the USP system were sintered with the HFIH system and rapid production was achieved by preventing grain growth.

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Section: Properties Of Usp Granule Particlesmentioning

confidence: 51%

Rapid processes for the production of nanocrystal yttria-stabilized tetragonal zirconia polycrystalline ceramics: ultrasonic spray pyrolysis synthesis and high-frequency induction sintering

KOÇ,

ŞAN

2023

Journal of Scientific Reports-A

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“…USP was carried out by following the method described by Perez‐Page et al [ 65 ] and is shown in the lower portion of Figure . Zirconium (IV) oxynitrate hydrate (99%, Sigma‐Aldrich, Saint Louis MO) and yttrium (III) nitrate hexahydrate (99.9%, Alfa Aesar) were dissolved in deionized water at a cation concentration of 0.4 m (Zr + and Y + combined molarity).…”

Section: Methodsmentioning

confidence: 99%

Spray Pyrolysis‐Aerosol Deposition for the Production of Thick Yttria‐Stabilized Zirconia Coatings

et al. 2021

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Aerosol deposition (AD) is a coating technique wherein particles are impacted onto a target substrate at reduced pressures, and supersonic particle impact velocities lead to coating consolidation. The limiting step in AD application is often not supersonic deposition operation, but aerosolization of powder particles with the proper size distribution; the translational impact velocity is strongly size‐dependent. It is demonstrated that by directly synthesizing particles in the gas phase, size‐controlled ceramic particles can be injected into AD systems. This in situ formation step obviates the need for particle aerosolization. Ultrasonic spray pyrolysis (USP) is applied to produce yttria‐stabilized zirconia (YSZ), and USP is directly coupled with AD to produce consolidated, thick, YSZ coatings on metal substrates. USP‐AD yields YSZ coatings on stainless steel and aluminum substrates with porosities <0.20, which grow to thicknesses beyond 100 μm. Aerodynamic particle spectrometry and electron microscopy reveal that the depositing particles are 200 nm–1.2 μm in diameter, though each particle is composed of nanocrystalline YSZ. Supporting computational fluid dynamics calculations demonstrate that the YSZ particle impact speeds are above 300 m s−1. Thermal conductivity measurements demonstrate that USP‐AD coatings have conductivities consistent with those produced from high‐temperature processes.

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“…Numerous methods such as pyrolysis [13], plasma spraying [14], plasma electrolytic oxidation [15], chemical/physical vapour deposition [16], pulsed laser deposition [17], electrophoretic deposition (EPD) [18], thermal spraying method [19] have been utilised for the preparation of HA coatings on metallic implants. Among them, the thermal spraying method has gathered widespread attention for in-vivo hard tissue regeneration due to the growth of thin HA coatings on a variety of orthopaedic prosthesis and dental implants [19][20][21][22][23].…”

Section: Introductionmentioning

confidence: 99%

Microstructural evolution and micromechanical properties of thermally sprayed hydroxyapatite coating

Saber‐Samandari

Baradaran

Alamara

et al. 2018

Advances in Applied Ceramics

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The effects of preheating and annealing processes on the micromechanical features of thermally sprayed hydroxyapatite (HA) coatings were investigated. The results indicated that subsequent heat treatment at 700°C for 60 min promotes the development of a crystalline HA coating. The EDS line scan showed that the oxygen content was homogeneous along the thickness direction from the coating surface to the titanium-HA interface, whereas the calcium and phosphorus concentration gradually decreased at 7 μm from the interface. From the roughness profiles, the coatings on preheated substrates gave lower roughness compared to the coatings at room temperature. According to the nanoindentation results, the sample preheated at 300°C after annealing at 700°C exhibited an elastic modulus of 108.1 ± 6 GPa and hardness of 5.97 ± 0.3 GPa, which were almost 3% lower and 171% higher than the bare substrate, respectively.

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Synthesis of porous yttria-stabilized zirconia microspheres by ultrasonic spray pyrolysis

Cited by 5 publications

References 14 publications

Rapid processes for the production of nanocrystal yttria-stabilized tetragonal zirconia polycrystalline ceramics: ultrasonic spray pyrolysis synthesis and high-frequency induction sintering

Rapid processes for the production of nanocrystal yttria-stabilized tetragonal zirconia polycrystalline ceramics: ultrasonic spray pyrolysis synthesis and high-frequency induction sintering

Spray Pyrolysis‐Aerosol Deposition for the Production of Thick Yttria‐Stabilized Zirconia Coatings

Microstructural evolution and micromechanical properties of thermally sprayed hydroxyapatite coating

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