Flying Combustion Experiments and Numerical Simulation for Ti-B4C-C Agglomerated Particles during the Self-Reactive Spray Forming Process

Jian Jiang Wang; Wen Bin Hu; Hong Wei Liu; Xin Kang Du

doi:10.4028/www.scientific.net/KEM.368-372.1686

Paper Titles

Monte-Carlo Simulation for the Grain Growth of Si₃N₄ during Sintering Process
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Molecular Dynamics Study of Diffusion Behavior in Amorphous Silica with Hydroxyl Group
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Application of Improved Back-Propagation Neural Network and Genetic Algorithm to the Preparation Processing of the Mg,Al-Hydrotalcite/Polymer Nanocomposite
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Modeling on Falling Velocity of Sodiumtetraborate Aqueous Solution Drops before the Gelation of PVA-TiO₂ Suspensions by the Runge-Kutta Method in Matlab 6.5
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Flying Combustion Experiments and Numerical Simulation for Ti-B₄C-C Agglomerated Particles during the Self-Reactive Spray Forming Process
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Atomistic Simulation of Defect Energy in Pyrochlores and its Effect on Disorder
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Simulation of the Grain Boundary Effects in PTCR Ceramics
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Lambdoidal Reinforced Microstructure of Mactridae Shell
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Ab-Initio Study on Adsorption and Diffusion of Au Atoms on Clean Si(001) and H-Si(001) Surface
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Flying Combustion Experiments and Numerical Simulation for Ti-B₄C-C Agglomerated Particles during the Self-Reactive Spray Forming Process

Abstract:

With Ti-B4C-C as self-reactive spray forming system, the flying combustion process of the sprayed particles was studied by means of water-quenching experiments and numerical simulation. It was found that after the particles have been heated in the oxyacetylene flame for a short time, Ti in the particles melts first and then infiltrates B4C and C. The SHS reaction of the sprayed particles takes place subsequently. Then the liquid ceramic beads appear and crystallize into ceramic grains finally. By the ANSYS finite element analysis, it can be known that the SHS reaction of the sprayed particles starts after they have left the muzzle for about 9.5×10-4s and lasts about 1.45×10-3s before the ceramic beads solidify. The calculated optimal melting distance for the spray particles is about 116mm, which is consistent with the experimental results on the whole.