Paper Title:
Synthesis Mechanisms of the Combustion Synthesis of IntermetCers Composites
  Abstract

Combustion synthesis techniques have been applied to an equiatomic mixture of Aluminium, Nickel, Titanium and Carbon powders in order to obtain NiAl/TiC composites. Both combustion modes have been used: the Self-propagating High-temperature mode (SHS), in which the reaction propagates through the sample under the form of a heat wave and the Thermal Explosion mode (TES), in which the reaction occurs simultaneously in the complete sample. The reactions have been followed in-situ by time-resolved diffraction, using synchrotron X-rays for the SHS mode and neutrons for the TES mode. Scanning Electron Micrographs and X-ray diffraction patterns of the final product have shown that the same final products were obtained when the mixture was synthesised under both combustion modes: a composite made of small and round TiC particles (~1 micron) embedded into a matrix of larger NiAl grains (5 microns). However, the Time-Resolved Diffraction studies have shown that, even with the same final products, the two combustion modes follow two completely different routes. Thus, for the SHS mode, the reaction is triggered by the formation of Nickel Aluminide and 3 intermediate phases are observed, and for the TES mode, the self-sustained reaction starts with the formation of Titanium Carbide and no intermediate phases have been seen.

  Info
Periodical
Edited by
P. VINCENZINI
Pages
1029-1034
DOI
10.4028/www.scientific.net/AST.45.1029
Citation
C. Curfs, A.E. Terry, G.B.M. Vaughan, E. H. Kisi, M.A. Rodriguez, Å. Kvick, "Synthesis Mechanisms of the Combustion Synthesis of IntermetCers Composites ", Advances in Science and Technology, Vol. 45, pp. 1029-1034, 2006
Online since
October 2006
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Xin Hua Zhu, Jian Min Zhu, Shun Hua Zhou, Zhi Guo Liu, Nai Ben Ming, Dietrich Hesse
Abstract:BaTiO3 (BT) nanoparticles were prepared by the hydrothermal technique using different starting materials and the microstructure examined by...
41
Authors: E. Otterstein, R. Nicula, J. Bednarčík, M. Stir, E. Burkel
Abstract:Quasicrystals are aperiodic long-range ordered solids with a high potential for many modern applications. Interest is nowadays paid to the...
943
Authors: Hannes Grillenberger, Andreas Magerl
Abstract:Oxygen precipitation in silicon has been studied in-situ by high energy X-ray diffraction. A gain of diffracted intensity is expected if an...
437
Authors: Masahito Watanabe, Akitoshi Mizuno, Toshihiko Akimoto, Shinji Kohara
Abstract:It is well known that multi-component alloys form bulk metallic glasses (BMGs) from the supercooled liquid state without rapid quenching....
1677
Authors: Chun Lin Fu, Meng Huo, Wei Cai, Xiao Ling Deng
Abstract:BiFeO3 powders were prepared by sol-gel process and calcined at different temperatures. The DTA curve shows an obvious exothermic...
142