Quantitative Analysis of Nicalon Fibres in TEM by EDXS and EELS

Imhoff, D.; Mozdzierz, N.; Backhaus‐Ricoult, M.

doi:10.1051/mmm:1995119

Cited by 3 publications

(2 citation statements)

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“…29,30 The photon absorption correction was done in EDXS 31 considering the thickness estimated by EELS 32 and the experimental value of the electron mean free path. 33 The local atomic composition in particle regions provided by EELS and EDXS are close together and confirm the consistence between the two TEM analysis modes ͑Table II͒. The atomic composition of the matrix determined out of the particle regions is obviously that of SiO 2 .…”

Section: B Structural and Chemical Characterization By Electron Micrsupporting

confidence: 68%

Magnetically textured γ-Fe2O3 nanoparticles in a silica gel matrix: Structural and magnetic properties

Bentivegna

Ferré

Nývlt

et al. 1998

Journal of Applied Physics

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This paper is devoted to magnetic and structural properties of anisotropic ␥-Fe 2 O 3 superparamagnetic particles dispersed in a transparent xerogel matrix. The effect of frozen anisotropy axes and magnetic texture, induced by a magnetic field applied during the solidification of the matrix on the in-field magnetization process, is studied by alternating gradient force magnetometry and first and second order magneto-optical effects. The changes of magnetization curves with respect to the ferrofluid solution at the same particle concentration are interpreted on the basis of an existing statistical approach extended to systems with particle size distribution, which has to be taken into account for real samples. A very good agreement between the experiment and theory was achieved for a log-normal distribution of diameters which well resembles that deduced from electron microscopy observations in different imaging modes. This structural analysis states the parameter values used in calculations and confirms the relevance of basic assumptions of the model for the specimens studied. The experimental results and the related theoretical discussion should be of use to understand magnetic properties of other magnetically textured superparamagnetic systems.

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Section: B Structural and Chemical Characterization By Electron Micrsupporting

confidence: 68%

Magnetically textured γ-Fe2O3 nanoparticles in a silica gel matrix: Structural and magnetic properties

Bentivegna

Ferré

Nývlt

et al. 1998

Journal of Applied Physics

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“…5 wt%, respectively. Nicalon fibres are composed of -SiC nanocrystals, an amorphous silicon oxycarbide phase and free aromatic carbon aggregates (Laffon et al, 1989;Imhoff et al, 1995). The gross composition of the Nicalon NL202-fibres used in the composites under investigation was determined in the as-received state by physicochemical analyses after burning off the sizing, yielding about 56 .…”

Section: Methodsmentioning

confidence: 99%

Phase identification in composite materials by EELS fine‐structure analysis

Schneider

Woltersdorf

Lichtenberger

1996

Journal of Microscopy

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Key words. Chemical bond state, energy-loss near-edge fine structure, interlayer chemistry, Nicalon fibre-reinforced borosilicate glass. SummaryMicroanalytical results obtained from two SiC-fibre-reinforced borosilicate glasses with hot-pressing temperatures of about 1373 and 1543 K show that for nanometre-sized regions a detailed phase analysis with respect to the chemical bonding of a certain element is possible by investigating energy-loss near-edge structures (ELNES). Examples are presented of the bonding state of silicon as revealed by analysing the Si-L 23 ELNES, which generally varies from predominantly carbidic in the fibre to oxidic in the matrix. In addition, content and type of silicon-containing phases inside carbon-rich interlayers, usually arising between fibre and matrix owing to chemical reactions, are characterized.

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Synthesis of multilayered composite nanotube heterostructure; SiC–SiO2, C–SiO2, and C–SiC–SiO2 nanotubes

Taguchi

Shamoto

2012

J Mater Sci

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Quantitative Analysis of Nicalon Fibres in TEM by EDXS and EELS

Cited by 3 publications

References 20 publications

Magnetically textured γ-Fe2O3 nanoparticles in a silica gel matrix: Structural and magnetic properties

Magnetically textured γ-Fe2O3 nanoparticles in a silica gel matrix: Structural and magnetic properties

Phase identification in composite materials by EELS fine‐structure analysis

Synthesis of multilayered composite nanotube heterostructure; SiC–SiO2, C–SiO2, and C–SiC–SiO2 nanotubes

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