DIFFRACTION STUDY ON THE THERMAL STABILITY OF Ti{sub 3}SiC{sub 2}/TiC/TiSi{sub 2} COMPOSITES IN VACUUM

Journal Article · Tue Jan 05 00:00:00 EST 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3295608· OSTI ID:21366883

Pang, W K; Low, I M; O'Connor, B H ^[1]; Studer, A J; Peterson, V K ^[2]; Palmquist, J -P ^[3]

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1. Centre for Materials Research, Department of Imaging and Applied Physics, Curtin University of Technology, GPO Box U 1987, Perth WA (Australia)
2. Bragg Institute, ANSTO, PMB 1, Menai, NSW 2234 (Australia)
3. Kanthal AB, Heating Systems R and D, P.O. Box 502, SE-734 27 Hallstahammar (Sweden)

Titanium silicon carbide (Ti{sub 3}SiC{sub 2}) possesses a unique combination of properties of both metals and ceramics, for it is thermally shock resistant, thermally and electrically conductive, damage tolerant, lightweight, highly oxidation resistant, elastically stiff, and mechanically machinable. In this paper, the effect of high vacuum annealing on the phase stability and phase transitions of Ti{sub 3}SiC{sub 2}/TiC/TiSi{sub 2} composites at up to 1550 deg. C was studied using in-situ neutron diffraction. The role of TiC and TiSi{sub 2} on the thermal stability of Ti{sub 3}SiC{sub 2} during vacuum annealing is discussed. TiC reacts with TiSi{sub 2} between 1400-1450 deg. C to form Ti{sub 3}SiC{sub 2}. Above 1400 deg. C, decomposition of Ti{sub 3}SiC{sub 2} into TiC commenced and the rate increased with increased temperature and dwell time. Furthermore, the activation energy for the formation and decomposition of Ti{sub 3}SiC{sub 2} was determined.

• OSTI ID: 21366883
• Journal Information: AIP Conference Proceedings, Vol. 1202, Issue 1; Conference: International conference on neutron and X-ray scattering - 2009, Kuala Lumpur (Malaysia), 29 Jun - 1 Jul 2009; Other Information: DOI: 10.1063/1.3295608; (c) 2009 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ACTIVATION ENERGY
ANNEALING
CERAMICS
DECOMPOSITION
NEUTRON DIFFRACTION
OXIDATION
PHASE STABILITY
PHASE TRANSFORMATIONS
SILICON CARBIDES
TITANIUM
TITANIUM CARBIDES
TITANIUM SILICIDES
CARBIDES
CARBON COMPOUNDS
CHEMICAL REACTIONS
COHERENT SCATTERING
DIFFRACTION
ELEMENTS
ENERGY
HEAT TREATMENTS
METALS
SCATTERING
SILICIDES
SILICON COMPOUNDS
STABILITY
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS