Details
| Original language | English |
|---|---|
| Pages (from-to) | 653-661 |
| Number of pages | 9 |
| Journal | Crystal research and technology |
| Volume | 35 |
| Issue number | 6 |
| Publication status | Published - 2000 |
Abstract
TiN interlayers in carbon fibre reinforced magnesium were investigated using high-resolution electron microscopy (HREM), scanning transmission electron microscopy (STEM) and electron energy loss spectroscopy (EELS), including analyses of near-edge fine structures (ELNES) and corresponding quantumchemical calculations. The nanocrystalline TiN fibre coatings of thicknesses between 10 and 30 nm were chemically vapour deposited from a TiCl4-N2-H2 atmosphere. Detailed ELNES measurements across the fibre/matrix interregion with a point-to-point distance of 1.3 nm in combination with quantumchemical calculations reveal in the fibre-near interlayer region interactions of the Ti-3d electrons with both the N-2p and the C-2p electrons resulting in mixed p-d-π and p-d-σ bondings. This hints to the formation of a TiC/TiN mixture of varying composition or of a titanium carbonitride (TiCxNy) with a high carbon content at the fibre/coating interface during the first steps of the coating by interaction of the carbon atoms of the fibre surface with the reactor gas. In this way the excellent adhesion of the TiN layers on the fibres can be understood which makes them appropriate for the important application in Mg matrices, where the layers have to serve as a suitable coupling medium between fibre and matrix.
ASJC Scopus subject areas
- Chemistry(all)
- General Chemistry
- Materials Science(all)
- General Materials Science
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Crystal research and technology, Vol. 35, No. 6, 2000, p. 653-661.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Complex bonding of titanium nitride layers in C/Mg composites revealed by ELNES features
AU - Woltersdorf, J.
AU - Feldhoff, A.
AU - Lichtenberger, O.
PY - 2000
Y1 - 2000
N2 - TiN interlayers in carbon fibre reinforced magnesium were investigated using high-resolution electron microscopy (HREM), scanning transmission electron microscopy (STEM) and electron energy loss spectroscopy (EELS), including analyses of near-edge fine structures (ELNES) and corresponding quantumchemical calculations. The nanocrystalline TiN fibre coatings of thicknesses between 10 and 30 nm were chemically vapour deposited from a TiCl4-N2-H2 atmosphere. Detailed ELNES measurements across the fibre/matrix interregion with a point-to-point distance of 1.3 nm in combination with quantumchemical calculations reveal in the fibre-near interlayer region interactions of the Ti-3d electrons with both the N-2p and the C-2p electrons resulting in mixed p-d-π and p-d-σ bondings. This hints to the formation of a TiC/TiN mixture of varying composition or of a titanium carbonitride (TiCxNy) with a high carbon content at the fibre/coating interface during the first steps of the coating by interaction of the carbon atoms of the fibre surface with the reactor gas. In this way the excellent adhesion of the TiN layers on the fibres can be understood which makes them appropriate for the important application in Mg matrices, where the layers have to serve as a suitable coupling medium between fibre and matrix.
AB - TiN interlayers in carbon fibre reinforced magnesium were investigated using high-resolution electron microscopy (HREM), scanning transmission electron microscopy (STEM) and electron energy loss spectroscopy (EELS), including analyses of near-edge fine structures (ELNES) and corresponding quantumchemical calculations. The nanocrystalline TiN fibre coatings of thicknesses between 10 and 30 nm were chemically vapour deposited from a TiCl4-N2-H2 atmosphere. Detailed ELNES measurements across the fibre/matrix interregion with a point-to-point distance of 1.3 nm in combination with quantumchemical calculations reveal in the fibre-near interlayer region interactions of the Ti-3d electrons with both the N-2p and the C-2p electrons resulting in mixed p-d-π and p-d-σ bondings. This hints to the formation of a TiC/TiN mixture of varying composition or of a titanium carbonitride (TiCxNy) with a high carbon content at the fibre/coating interface during the first steps of the coating by interaction of the carbon atoms of the fibre surface with the reactor gas. In this way the excellent adhesion of the TiN layers on the fibres can be understood which makes them appropriate for the important application in Mg matrices, where the layers have to serve as a suitable coupling medium between fibre and matrix.
UR - http://www.scopus.com/inward/record.url?scp=0033713995&partnerID=8YFLogxK
U2 - 10.1002/1521-4079(200007)35:6/7<653::AID-CRAT653>3.0.CO;2-N
DO - 10.1002/1521-4079(200007)35:6/7<653::AID-CRAT653>3.0.CO;2-N
M3 - Article
AN - SCOPUS:0033713995
VL - 35
SP - 653
EP - 661
JO - Crystal research and technology
JF - Crystal research and technology
SN - 0232-1300
IS - 6
ER -