Effects of Ball Milling Processing on Solidified TiC-TiB₂ Composites Prepared by Combustion Synthesis in High Gravity Field

Abstract:

By combining ball milling processing with combustion synthesis in ultrahigh gravity field, the solidified TiC-TiB₂ composite was achieved with fine-grained and ultrafine-grained microstructure. It is considered that taking balling milling processing to mechanically activate powder blend promotes thermal explosion to occur in ultrahigh gravity field by reducing ignition temperature, increases sharply the actual temperature of full-liquid product, thereby not only accelerating liquid-liquid separation of TiC-TiB₂ liquid and Al₂O₃ droplets, but also refining the solidified microstructure by enhancing undercooling of TiC-TiB₂ liquid, finally, brings about a series of dramatic improvements in densification and mechanical properties of the ceramic.

• Periodical: Key Engineering Materials (Volumes 602-603)
• Pages: 467-472
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.602-603.467
• Online since: March 2014
• Authors: Zhong Min Zhao*, De Jun Yin, Long Zhang, Shuan Jie Wang, Min Quan Wang
• Keywords: Ball Milling Processing, Combustion Synthesis, TiC-TiB₂ Composite, Ultrahigh Gravity Field

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