Spin combustion in the nickel-silicon system |
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Authors: | S. Zhang Z. A. Munir |
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Affiliation: | (1) Division of Materials Science and Engineering, College of Engineering, University of California, 95616-5294 Davis, CA, USA;(2) Present address: Research Institute of Electric Light Source Materials, Nanjing, People's Republic of China |
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Abstract: | The combustion synthesis of five Ni-Si phases was investigated. Without preheating, samples corresponding to the initial stoichiometries Ni3Si, Ni5Si2, Ni3Si2, and NiSi sustained a self-propagating combustion mode which advanced in a spin mode. With preheating (> 500 °C), the sample combusted in a steady-state mode. Average combustion wave velocities and frequencies of spin showed maxima at a composition of 33 at % Si. The combustion temperature showed a maximum at a composition in the range of 33–40 at%. In contrast, the ignition temperature showed a minimum at a composition of 33 at%. X-ray analyses showed that in all cases, the product of combustion was multi-phase with the primary phase corresponding to the initial stoichiometry of the reactant. |
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