Study on the Microstructure and the Machining Performance of Ti₃SiC₂-TiB₂- TiC Composite Ceramic

Abstract:

The Ti₃SiC₂-TiB₂-TiC three-phase ceramics are prepared by Spark Plasma Sintering (SPS) method with Self-propagating High-temperature Synthesis (SHS) using Ti, Si, C andB₄C powders. The characterization of sintering product’s image and structure is analyzed by XRD and SEM. Most of TiB₂’s images are angular cuboid or short bar-shaped and most of TiC phase’s images are irregular spherical particles which are evenly embedded in Ti₃SiC₂ substrate and have a good combination interface with Ti₃SiC₂. In the composite ceramic SPS sintering process, sinter sample’s displacement along Z-axis goes through three stages of falling, balance and rising along with the change of heating temperature, which reflects the sample’s change rule between heated expansion force and pressure. Finally its machining performance is analyzed by wire cutting method and machining method. The Ti₃SiC₂-TiC-TiB₂ block composite ceramic proves to have a good machining performance.

• Periodical: Solid State Phenomena (Volume 281)
• Pages: 426-431
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.281.426
• Online since: August 2018
• Authors: Xiang Jun Tang, Jun Shou Li*, Fang Zhao, Li Qing
• Keywords: Composite Ceramic, Machining Performance, Ti₃SiC₂, TiB₂

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