Fabrication of High-Content Ti_3AlC_2 Powders by Mechanical Alloying

摘要

In the present study, high-content Ti_3AlC_2 ceramic powders were fabricated by mechanical alloying (MA) using the Ti, Al and C as the starting materials. And the effect of Al content on the formation of Ti_3AlC_2 was investigated. The results showed that the large-sized granules were obtained to coexist with the powders after ball milling of 3Ti/Al/2C powder mixtures for 3 h. Ti_3AlC_2 in the synthesized powders is the main phase based on the XRD analysis. For the composition of 3Ti/1.1Al/2C, high-content Ti_3AlC_2 powders (87.6 wt.%) have been obtained after milling for 3h. Excessive Al, however, would reduce the content of Ti_3AlC_2 in the products.