Evaluation of Y2O3 surface machinability using ultra-precision lapping process with IED

Wan, Ji; Hwang, Sung Chul; Lee, Eun Sang

doi:10.1007/s12206-009-0103-3

Cited by 10 publications

(6 citation statements)

References 8 publications

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“…The structural stability coupled with mechanical properties also make Y 2 O 3 an interesting material for other applications. Specifically, Y 2 O 3 has been in use in the development of functional ceramics for solid oxide fuel cells, nuclear engineering, high-temperature protective coatings, and metal-reinforced composites for high strength structural components. − …”

Section: Introductionmentioning

confidence: 99%

Electronic Structure and Optical Quality of Nanocrystalline Y₂O₃ Film Surfaces and Interfaces on Silicon

et al. 2014

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Nanocrystalline yttrium oxide (Y 2 O 3 ) thin films were made by sputter deposition onto silicon (100) substrates keeping the deposition temperature fixed at 300 °C. The surface/interface chemistry, Y−O bonding, and optical constants of the Y 2 O 3 film surface and Y 2 O 3 −Si interface were evaluated by the combined use of X-ray photoelectron spectroscopy (XPS), depth-profiling, and spectroscopic ellipsometry (SE). XPS analyses indicate the binding energies (BEs) of the Y 3d doublet; i.e., the Y 3p 5/2 and Y 3d 3/2 peaks are located at 117.0 and 119.1 eV, respectively, characterizing yttrium in its highest chemical oxidation state (Y 3+ ) in the grown films. The optical model is constructed based on the XPS depth profiles, which indicate that the Y 2 O 3 //Si heterostructure can be represented with Y 2 O 3 filmY x Si y O z interfacial compoundSi substrate. Such a model accounts for the experimentally determined ellipsometry functions and accurately produces the dispersive index of refraction (n(λ)) of Y 2 O 3 and Y x Si y O z . The n(λ) of Y 2 O 3 and Y x Si y O z follows Cauchy's dispersion relation, while the Y x Si y O z formation accounts for degradation of optical quality.

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Section: Introductionmentioning

confidence: 99%

Electronic Structure and Optical Quality of Nanocrystalline Y₂O₃ Film Surfaces and Interfaces on Silicon

et al. 2014

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“…Due to the unique characteristics of ceramic materials, its applications is increasing in different fields. Y 2 O 3 (Yttria) is a great promising and worthy material for optical, electronic, and mechanical purposes . Yttrium oxide is the most well‐known yttrium compound, which is widely recognized as a host for ion doping of other rare‐earth elements .…”

Section: Introductionmentioning

confidence: 99%

First‐Principles Study of Elastic, Structural, Electronic, Thermodynamical, and Optical Properties of Yttria (Y₂O₃) Ceramic in Cubic Phase

2013

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Structural, elastic, optical, thermodynamical, and electronic properties of yttrium oxide compound in cubic phase have been studied using the full-potential augmented plane waves (FP-LAPW) within density functional theory (DFT) framework. Four different approximations were used for exchange-correlation potentials terms, comprised Perdew-Burke-Ernzerhof generalized parameterization of gradient approximation (GGA-PBE), Wu-Cohen (WC-GGA), localdensity approximation (LDA), and new approximation modified Becke and Johnson (mBJ-GGA). The structural properties such as equilibrium lattice parameter, bulk modulus and its pressure derivative have been obtained using optimization method. Moreover, Elastic constants, Young's modulus, shear modulus, Poisson's ratio, sound velocities for longitudinal and shear waves, Debye average velocity, Debye temperature, and Gr€ uneisen parameters have been calculated. Obtained structural, elastic and other parameters are consistent with experimental data. Moreover pressure dependence of the elastic moduli was studied. From electronic calculations, it has been found that the band gap was 5.7 eV at Г point in the Brillouin zone using mBJ-GGA approximation. Optical properties, such as the dielectric function, refractive index, extinction index, and optical band gap, were calculated for radiation up to 14 eV. In addition, the unique type of bonding in Y 2 O 3 was discussed by three method including effective charge, B/G ratio, and charge density distribution.

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“…26 Y 2 O 3 is widely used in high temperature environment because it offers excellent thermal resistance and chemical inertness. Phase transformations in Y 2 O 3 were not observed up to about 2400 C. 27 Non-homogenous grain growth as observed in a powdered mixture of ferrite and ceramic nanoparticles after thermochemical water-splitting reaction can be further mitigated by encapsulating ferrite nanoparticles by a thin-shell of high temperature ceramic material capable of withstanding thermal stresses. [28][29][30] By encapsulating the ferrite nanoparticles within ceramic shell, it may be possible to create core-shell morphology, which will be capable of inhibiting the grain growth or particle sintering of ferrite nanoparticles especially at high temperatures.…”

Section: Introductionmentioning

confidence: 99%

H2 generation from thermochemical water-splitting using yttria stabilized NiFe2O4 core-shell nanoparticles

Amar

Puszynski

Shende

2015

Journal of Renewable and Sustainable Energy

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This investigation reports synthesis of core-shell NiFe 2 O 4 /Y 2 O 3 nanoparticles by sol-gel technique and their H 2 volume generation ability via thermochemical water-splitting reaction at 900 C-1100 C. Thermochemical water-splitting process involves a cyclic operation of a low-temperature water-splitting step and relatively high temperature regeneration step using redox materials. Because of the cyclic nature of the process, the redox materials undergo thermal fatigue leading to grain growth or sintering, consequently, steady H 2 production is not realized in multiple thermochemical cycles. In this study, attempts were made to achieve steady H 2 volume generation in multiple thermochemical cycles using core-shell nanoparticles, which were synthesized using precursors such as NiCl 2 , FeCl 2 , and YCl 3 , and pluronic P123 surfactant template. H 2 volume generated by NiFe 2 O 4 /Y 2 O 3 core-shell nanoparticles was found to be relatively stable over multiple thermochemical cycles. Contrasting to this, the H 2 volume generation was found to decrease continuously over multiple thermochemical cycles using NiFe 2 O 4 nanoparticles as well as NiFe 2 O 4 /Y 2 O 3 powdered mixture of nanoparticles. The transient O 2 profiles were also compared for both the core-shell nanoparticles and powdered mixture during multiple regeneration steps. Detailed transmission electron microscopy (TEM) analysis clearly provided evidence of core-shell morphology with NiFe 2 O 4 core encapsulated by Y 2 O 3 shell. The grain size and morphological properties of as-prepared nanoparticles were compared with the nanoparticles obtained after thermochemical water-splitting reaction using powdered X-ray diffraction, and scanning electron microscopy. V C 2015 AIP Publishing LLC. [http://dx.

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Evaluation of Y2O3 surface machinability using ultra-precision lapping process with IED

Cited by 10 publications

References 8 publications

Electronic Structure and Optical Quality of Nanocrystalline Y₂O₃ Film Surfaces and Interfaces on Silicon

Electronic Structure and Optical Quality of Nanocrystalline Y₂O₃ Film Surfaces and Interfaces on Silicon

First‐Principles Study of Elastic, Structural, Electronic, Thermodynamical, and Optical Properties of Yttria (Y₂O₃) Ceramic in Cubic Phase

H2 generation from thermochemical water-splitting using yttria stabilized NiFe2O4 core-shell nanoparticles

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Evaluation of Y2O3 surface machinability using ultra-precision lapping process with IED

Cited by 10 publications

References 8 publications

Electronic Structure and Optical Quality of Nanocrystalline Y2O3 Film Surfaces and Interfaces on Silicon

Electronic Structure and Optical Quality of Nanocrystalline Y2O3 Film Surfaces and Interfaces on Silicon

First‐Principles Study of Elastic, Structural, Electronic, Thermodynamical, and Optical Properties of Yttria (Y2O3) Ceramic in Cubic Phase

H2 generation from thermochemical water-splitting using yttria stabilized NiFe2O4 core-shell nanoparticles

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Product

Resources

About

Electronic Structure and Optical Quality of Nanocrystalline Y₂O₃ Film Surfaces and Interfaces on Silicon

Electronic Structure and Optical Quality of Nanocrystalline Y₂O₃ Film Surfaces and Interfaces on Silicon

First‐Principles Study of Elastic, Structural, Electronic, Thermodynamical, and Optical Properties of Yttria (Y₂O₃) Ceramic in Cubic Phase