期刊
INTERMETALLICS
卷 16, 期 9, 页码 1134-1141出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.intermet.2008.06.015
关键词
sintering; titanium aluminides, based on TiAl; mechanical properties at ambient temperature; mechanical properties at high temperature; microstructure
In the present study, the spark plasma sintering technique is used to densify pre-alloyed TiAl powders. Ti49Al47Cr2Nb2 and Ti51Al44Cr2Nb2B1 powders are sintered at temperatures ranging between 1100 degrees C and 1250 degrees C to yield various microstructures. Two-phased (gamma + alpha(2)), duplex and lamellar microstructures are generated depending on the powder and the sintering temperature. Full compaction is achieved in a short period of time and the overall processing duration does not exceed 30 min. The resultant tensile properties at room temperature are very promising whereas a limited creep resistance was obtained at 700 degrees C (C) 2008 Elsevier Ltd. All rights reserved.
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