Abstract

Titanium alloys are extensively used in high-temperature applications due to their excellent high strength and corrosion resistance properties. However, titanium alloys are problematic because they tend to be extremely difficult-to- cut material. In this paper, the powder synthesis, spark plasma sintering (SPS), bulk material characteristics and machin- ability test of hybrid Ti2AlC ceramic bulk materials were systematically examined. The bulk samples mainly consisted of Ti2AlC materials with density close to theoretical value were synthesized by a SPS method. Random orientation and good crystallization of the Ti2AlC was observed at 1100 o C for 10 min under SPS sintering conditions. Scanning electron microscopy results indicated a homogeneous distribution and nano-laminated structure of Ti2AlC MAX phase. The hard- ness and electrical conductivity of Ti2AlC were higher than that of Ti 6242 alloy at sintering temperature of 1000 o C~ 1100 o C. Consequently, the machinability of the hybrid Ti2AlC bulk materials is better than that of the Ti 6242 alloy for micro-EDM process of micro-hole shape workpiece.

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