An Electron Diffraction Study on the Crystal Structure of a New Modification of Chromium

Kimoto, Kazuo; Nishida, Isao

doi:10.1143/jpsj.22.744

Cited by 145 publications

(39 citation statements)

References 9 publications

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“…The arrows on XRD patterns of Fig. 4 show the complete transformation of the metastable ␦-Cr phase into the stable bcc-Cr one beyond 723 K, in good agreement with literature data [25][26][27]. Traces of chromium oxide appear above 823 K, mainly due to the residual oxygen partial pressure in the XRD analysis chamber.…”

Section: Evidence Of the Metastable Phase ı-Crsupporting

confidence: 89%

“…The first one corresponds to the stable bcc cubic structure with Im-3m (229) space group and 2.88 Å cell parameter (PDF 00-006-0694), noted bcc-Cr (or ␣-Cr). The second one is a primitive cubic metastable phase with Pm-3n (223) space group and 4.59 Å cell parameter (PDF 00-019-0323) [25,26], noted ␦-Cr.…”

Section: Introductionmentioning

confidence: 99%

“…The processes leading to the growth of the metastable phase are rare. Evaporation and condensation of chromium in argon at low pressures [25][26][27] led to the formation of crystalline metastable ␦-Cr. The same authors reported the structural transformation of the metastable phase to the stable one above 723 K.…”

Section: Introductionmentioning

confidence: 99%

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Evidence for a Cr metastable phase as a tracer in DLI-MOCVD chromium hard coatings usable in high temperature environment

Michau

Maury

Schuster

et al. 2017

Applied Surface Science

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Section: Evidence Of the Metastable Phase ı-Crsupporting

confidence: 89%

Section: Introductionmentioning

confidence: 99%

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Evidence for a Cr metastable phase as a tracer in DLI-MOCVD chromium hard coatings usable in high temperature environment

Michau

Maury

Schuster

et al. 2017

Applied Surface Science

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“…1- 8 The studies of magnetic nanoparticles are important since future magnetic media will require higher bit densities. For Co ͑Refs.…”

Section: Introductionmentioning

confidence: 99%

Coalescence aspects of cobalt nanoparticles during in situ high-temperature annealing

Palasantzas

Vystavel

Koch

et al. 2006

Journal of Applied Physics

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Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. In this work we investigate the coalescence aspects of Co nanoparticles. It was observed that nanoparticles in contact with the substrate are relatively immobile, whereas those on top of other Co particles can rearrange themselves during high-temperature annealing and further coalesce. Indeed, similar size particles prior to coalescence come at close proximity forming an arc-shaped area, which leads to finite-size necking and thereafter to coalescence towards a single partially spherical particle. This is in contrast to the theoretical predictions where necking occurs following an initial pathway of a point contact. Moreover, it was shown that after necking a transient period of relatively fast coalescence occurs followed by a slower coalescence rate at constant speed towards a single particle with partial spherical shape. In addition, the coalescence is faster with decreasing particle size, where in the case of unequal size the smallest particle is mainly absorbed by an adjacent large one in an Ostwald ripening process.

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“…As a result, the time scale for forming nanoparticle alloys becomes markedly faster than that for the bulk material, i.e., from a couple of years to several seconds. Sometimes, even the stable crystal structures change for nanoparticles (Kimoto and Nishida, 1967). Actually, it has been reported that the crystal structure of pentacene is changed in thin film (Kakudate et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Formation of polycyclic aromatic hydrocarbon grains using anthracene and their stability under UV irradiation

et al. 2010

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It has been known for some time that the properties of a material are changed in nanometer size. Since it is nontrivial that polycyclic aromatic hydrocarbon (PAH) grains at the nanometer scale show similar properties with that of macroscopic scale, PAH grains were synthesized by a gas evaporation method and were analyzed using a transmission electron microscope and their UV-Vis and mid-IR spectra were measured. Results from these experiments showed that condensed anthracene grains from the gas phase had a planar form and showed similar infrared peaks compared to anthracene molecules, but with somewhat wider bands and different relative intensities. Some new features were also observed. The anthracene molecules formed photodimer in their grain and showed different infrared features after UV irradiation. This would be the first report concerning nanometersized PAH grains.

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An Electron Diffraction Study on the Crystal Structure of a New Modification of Chromium

Cited by 145 publications

References 9 publications

Evidence for a Cr metastable phase as a tracer in DLI-MOCVD chromium hard coatings usable in high temperature environment

Evidence for a Cr metastable phase as a tracer in DLI-MOCVD chromium hard coatings usable in high temperature environment

Coalescence aspects of cobalt nanoparticles during in situ high-temperature annealing

Formation of polycyclic aromatic hydrocarbon grains using anthracene and their stability under UV irradiation

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