Simultaneous synthesis and densification of TiC/Ni-Al composites

D, Dunmead, Stephen; Munir, Zuhair A.; Holt, Jason; Kingman, D.D.

doi:10.1007/bf01130188

Cited by 67 publications

(27 citation statements)

References 21 publications

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“…A number of processes exist for synthesizing titanium carbide powders, such as carbothermal reduction of titanium dioxide, 4) direct carbarization of titanium, 5) chemical reaction of titanium chloride (TiCl 4 ), 6) self-propagating hightemperature synthesis, 7) amongst others. Each method has varying characteristics of particle size and distribution, morphology, state of agglomeration, chemical purity, and stoichiometry.…”

Section: Introductionmentioning

confidence: 99%

Effect of Raw Material Characteristics on the Carbothermal Reduction of Titanium Dioxide

Lee

Kim

2003

Mater. Trans.

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Section: Introductionmentioning

confidence: 99%

Effect of Raw Material Characteristics on the Carbothermal Reduction of Titanium Dioxide

Lee

Kim

2003

Mater. Trans.

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“…A periodic rise and fall of the cell temperature is observed in the region D-~ E which is produced by the back flow of heat as the wave advances through the following cells. Irregularities have been observed in similar regions of experimentally measured time-temperature profiles but it is uncertain if they are due to the same mechanism [4].…”

Section: Model Results and Comparison Withmentioning

confidence: 58%

“…One of the major disadvantages of the process is that SHS produced ceramics are of high porosity unless some means of densification, e.g. hot pressing, is employed concurrently [4].…”

Section: Introductionmentioning

confidence: 99%

Finite-difference modelling of self-propagating high-temperature synthesis of materials

Bowen

Derby

1995

Acta Metallurgica et Materialia

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Abstract--The modelling of self-Pr0Pagating high-temperature reactions is attempted using a finite difference model. The model is described and model results are compared with experimentally observed combustion wave velocities for the reaction 3TIO2 + 4A1 + 3C ~ 3TiC + 2AI 2 03 using various processing parameters (diluents, preheating etc.). The model is extended to derive a parameter which determines under what conditions a reaction will become self-propagating.

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“…[7][8][9] A number of processes exist for synthesizing titanium carbide, such as the carbothermal reduction of titanium dioxide, 10) direct carbarization of titanium, 11) chemical reaction of titanium chloride (TiCl 4 ), 12) self-propagating high temperature synthesis, 13) etc. Generally, these processes require a temperature range of 1700-2100 K for the commercial production of the titanium carbide powder.…”

Section: Introductionmentioning

confidence: 99%

Carbothermic Reduction of Oxide Powder Prepared from Titanium Dioxide and Cobalt Nitrate

Lee

2006

Mater. Trans.

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The carbothermic reduction of a titanium-cobalt-oxygen-based oxide powder was analyzed to understand the carbothermal reduction step of the spray thermal conversion process for the synthesis of titanium carbide/cobalt composite powder. The starting powder was prepared by the combination of the spray drying and desalting methods using titanium dioxide powder and cobalt nitrate. The synthesized oxide powders were mixed with carbon black, and then these mixtures were heat treated under a flowing argon atmosphere. The changes in the phase structure and thermal gravity of the mixtures during heat treatment were analyzed using XRD and TG-DTA. The synthesized oxide powders have a mixed phase structure of anatase-TiO 2 and CoTiO 3 phases without regard to the cobalt content. These composite oxide powders were carbothermally reduced to the titanium carbide/cobalt composite powder through four steps with increasing temperature; reduction of CoTiO 3 , reduction of anatase-TiO 2 , formation of titanium oxycarbide and formation of TiC from titanium oxycarbide. The titanium carbide formability increased with the increasing relative amount of the complex oxide, CoTiO 3 , in the titanium-cobalt-oxygen-based oxide powder.

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Simultaneous synthesis and densification of TiC/Ni-Al composites

Cited by 67 publications

References 21 publications

Effect of Raw Material Characteristics on the Carbothermal Reduction of Titanium Dioxide

Effect of Raw Material Characteristics on the Carbothermal Reduction of Titanium Dioxide

Finite-difference modelling of self-propagating high-temperature synthesis of materials

Carbothermic Reduction of Oxide Powder Prepared from Titanium Dioxide and Cobalt Nitrate

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