Synthesis and pyrolysis of novel polymeric precursors to TiC/Al[sub 2]O[sub 3], TiN/Al[sub 2]O[sub 3], and AlN/TiN nanocomposites

Journal Article · Fri Jul 01 00:00:00 EDT 1994 · Chemistry of Materials; (United States)

DOI:https://doi.org/10.1021/cm00043a033· OSTI ID:6567478

Jiang, Z; Rhine, W E ^[1]

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1. Massachusetts Institute of Technology, Cambridge, MA (United States)

The reaction between furfuryl alcohol (FuOH) and the products obtained by hydrolyzing a mixture of Ti(O-n-Bu)[sub 4] and Al(O-sec-Bu)[sub 3] resulted in the formation of soluble polymeric solids. Pyrolysis of these polymers in argon yielded TiC/Al[sub 2]O[sub 3] composites at 1250-1375[degrees]C; further heating the precursors to 1500[degrees]C in argon led to the formation of a new phase due to the reaction between C, Al[sub 2]O[sub 3], and TiC. When these polymers were pyrolyzed in ammonia or nitrogen, a TiN/Al[sub 2]O[sub 3] or TiN/AlN nanocomposite was formed, depending on the concentration of FuOH in the polymers. All these composites exhibited a fine-grained microstructure and excellent homogeneity. Furthermore, the structure and pyrolysis chemistry of these polymeric precursors, as well as the microstructure of the pyrolysis products, were studied by FTIR, TGA, GC, XRD, SEM, TEM, STEM, Auger electron spectroscopy (AES), and elemental analyses. 38 refs., 7 figs., 2 tabs.

• OSTI ID: 6567478
• Journal Information: Chemistry of Materials; (United States), Vol. 6:7; ISSN 0897-4756
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM NITRIDES
CHEMICAL PREPARATION
ALUMINIUM OXIDES
TITANIUM CARBIDES
TITANIUM NITRIDES
ABSORPTION SPECTROSCOPY
AUGER ELECTRON SPECTROSCOPY
COMPOSITE MATERIALS
GAS CHROMATOGRAPHY
SCANNING ELECTRON MICROSCOPY
THERMAL GRAVIMETRIC ANALYSIS
TRANSMISSION ELECTRON MICROSCOPY
X-RAY DIFFRACTION
ALUMINIUM COMPOUNDS
CARBIDES
CARBON COMPOUNDS
CHALCOGENIDES
CHEMICAL ANALYSIS
CHROMATOGRAPHY
COHERENT SCATTERING
DIFFRACTION
ELECTRON MICROSCOPY
ELECTRON SPECTROSCOPY
GRAVIMETRIC ANALYSIS
MATERIALS
MICROSCOPY
NITRIDES
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PNICTIDES
QUANTITATIVE CHEMICAL ANALYSIS
SCATTERING
SEPARATION PROCESSES
SPECTROSCOPY
SYNTHESIS
THERMAL ANALYSIS
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
360201* - Ceramics
Cermets
& Refractories- Preparation & Fabrication
360202 - Ceramics
Cermets
& Refractories- Structure & Phase Studies