Global ETD Search
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Showing 1 to 10 of 10 for “"reaction synthesis"”.
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Reaction Synthesis of Titanium Aluminide / Titanium Diboride in-Situ Composites
Reaction synthesis is a processing technique where the thermal activation energy needed to form a compound is provided by the exothermic heat of formation of the thermodynamically stable product. This type of synthesis has been used to form a variety of ceramics, intermetallics, and in-situ …
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Reaction Synthesis of HfB2 in a Variety of Metallic Environments
… scanning calorimetry (DSC) to reveal reaction initiation temperatures and enthalpies of reaction; and optical pyrometry to measure maximum reaction temperatures. Overall, DSC results indicated melting preceded reaction initiation; suggesting that the reaction initiation temperature for …
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Microwave-Mediated Hetero Diels-Alder reaction: Synthesis of biologically active compounds
… for human beings. A powerful tool for the synthesis of such compounds is the hetero Diels-Alder reaction (HDA), that involve a [4+2] cycloaddition reaction between heterodienes and suitable dienophiles. Among heterodienes to be used in such six-membered heterocyclic construction strategy, …
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The Stetter reaction : synthesis of complex spiro Bis-indanes and studies on quaternary centre formation
This work covers recent advances in the Stetter reaction, including two novel domino Stetter reactions and preliminary studies on quaternary center formation via the intermolecular Stetter reaction. The N-heterocyclic carbene (NHC) catalyzed domino Stetter-aldol-Michael dimerization of o-formyl …
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In-situ Synthesis of Piezoelectric-Reinforced Metal Matrix Composites
The in-situ synthesis of piezoelectric-reinforced metal matrix composites has been attempted with a variety of target matrix and reinforcement materials using reaction synthesis and high energy ball milling. Zinc oxide (ZnO) and barium titanate (BaTiO₃) have been successfully synthesized within …
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Structural Characterization and Thermoelectric Performance of ZrNiSn Half-Heusler Compound Synthesized by Mechanical Alloying
… reported for high temperature solid state reaction synthesis of this compound. HP samples, compared to SPS samples, demonstrate increased grain growth due to longer heating times. Reduced grain size achieved by MA and SPS causes increased phonon scattering due to the increased number of …
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Codeformation Processing of Mechanically-Dissimilar Metal/Intermetallic Composites
… The IMCs are produced using an in-situ reaction synthesis technique, called the XD™ process. The temperature of the exothermic synthesis reaction, called the adiabatic temperature, has been calculated and shown to increase with increasing volume percentage of TiB2 reinforcement. Further, …
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Synthesis of inhibitors of polysialyltransferases PST and STX. Development of routes to synthesis, preparation and purification of carbohydrate and carbacycle-based potential inhibitors of the polysialyltransferase enzymes PST and STX
… this project is that inhibition of polySia biosynthesis will prevent (or reduce) tumour cell migration and invasion, thereby reducing the incidence of metastasis, which will lead to higher patient survival. The work reported in this thesis describes efforts towards the synthesis …
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High temperature flow behavior of titanium aluminide intermetallic matrix composites
Al₃Ti, Al₅CuTi₂, and Al₆₆Mn₁₁Ti₂₃, intermetallic matrices reinforced with 30, 40, and 50 volume % TiB, have been produced by XD<sub>™</sub> processing and densified into bulk form by powder metallurgy techniques. The compressive flow behavior of the Al₃Ti and Al₅CuTi₂, composites have been …
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Catalysis over molybdenum containing nitride materials
Reactions involving nitrogen transfer/ fixation are of great industrial interest, as novel processes could help industries meet their increasingly challenging economic and environmental targets. An example of this could be the direct synthesis of aniline from benzene, which would avoid the lengthy, …