Effects of calcium nitride and calcium carbonate gasifying agents on the combustion synthesis of Ni3Ti-TiC composites |
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Authors: | Douglas E. Burkes Hu Chun Yi Guglielmo Gottoli John J. Moore |
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Affiliation: | (1) Metallurgical and Materials Engineering Department, Colorado School of Mines, Golden, CO 80401, USA;(2) Center for Commercial Applications of Combustion in Space, Colorado School of Mines, Golden, CO 80401, USA;(3) Guigne International Ltd., St. John's, NL A1L 1C1, Canada |
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Abstract: | The synthesis of nickel-titanium (NiTi) intermetallic composites is of considerable interest due to the ability to create a porous material with high strength and improved wear resistance. The effects of adding a carbon reactant to modify the reaction products and exothermicity have been studied using two reaction stoichiometries involving elemental nickel, titanium and carbon (graphite). The present study examines the synthesis of porous Ni3Ti intermetallic composites in the presence of calcium nitride or calcium carbonate gasifying agent. Both gasifying agents show significant effects on the ignition characteristics of the reaction, burning velocities and TiC particle sizes present in the final product, but do not affect the combustion temperatures. |
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