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Microsized c-TiAl powders with composition of Ti-50Al (at.-%) and Ti-48Al-2Cr-2Nb (at.-%) were consolidated using a rapid consolidation technique called plasma pressure compaction (P 2 CH) to obtain samples with near gamma, duplex and fully lamellar microstructure. The consolidated samples exhibited minimal grain growth during consolidation, thereby retaining superior mechanical properties. The mechanical properties varied significantly with microstructure type, grain size and alloy composition. Samples with a duplex microstructure and average grain size of 5 mm exhibited the best set of mechanical properties with flexure strength, ductility, elastic modulus and fracture toughness as high as 1238 MPa, 2 . 3%, 154 . 58 GPa and 17 . 95 MPa m 1/2 respectively. Exposure in air at temperatures .800uC, had an adverse effect on the flexure strength of the consolidated samples.

This study reports on the microstructure and mechanical properties of titanium diboride (TÍB2) that was rapidly consolidated via plasma pressure compaction (P^C®). Titanium diboride powder with 2.5 wt % of silicon nitride (SÍ3N4), as a sintering aid, was rapidly consolidated using P^C® to inhibit grain growth and ensure high strength and ductility of the consolidated material. The consolidated specimens were 93.5% of theoretical density. The microstructure of the consolidated material was characterized using optical microscopy, scanning electron microscopy, and wavelength dispersive spectroscopy. Oxygen concentration in the consolidated sample was 13.55% less than in the as-received powders. The flexure strength, fracture toughness. Young's modulus, and Vickers hardness of the consolidated specimens were measured at room temperature and were found to be equivalent if not superior to those reported in the literature.

This paper reports on the microstructure and mechanical properties of titanium diboride (TiB2) consolidated by plasma pressure compaction (P2C)*. Titanium diboride powder with 2.5 wt% of silicon nitride (Si3N4) used as a sintering aid was rapidly consolidated via P2C at 1500°C. This rapid consolidation process inhibits grain growth and ensures high strength and ductility of the consolidated material. Microstructure of the consolidated material was characterized via optical microscopy, scanning electron microscopy and wavelength dispersive spectroscopy. The consolidated specimens showed 93.5% densification with no apparent porosity. The morphology of the consolidated sample as studied by chemical composition analysis was found to be similar to that of the powder. The flexure strength, fracture toughness, Young’s modulus and Vicker hardness of the consolidated specimens were measured at room temperature. The mechanical properties were found to be equivalent if not superior to the typical mechanical properties reported in the literature.