Obrabotka Metallov 2013 No. 4

ОБРАБОТКА МЕТАЛЛОВ № 4 (61) 2013 42 МАТЕРИАЛОВЕДЕНИЕ 85 to 95 %. It is supposed that the temperature increase activates plastic deformation process which in such condi- tions proceeds according to the twinning mechanism. In order to increase density and decrease porosity of material it is rational to grind up the powder material and add nanoparticles to the powder mixture. Microhardness of the sintered materials ranges from 3950 to 4100 MPa. Sintering the powder mixture at 1100 o C leads to the formation of material with a maximum value of flexural strength equal to 890 MPa. Keywords: intermetallics, nickel aluminide, spark plasma sintering, heat temperature. References 1. Taub A. I., Fleischer R. L. Intermetallic Compounds for High-Temperature Structural Use. Science. 1989, Vol. 243, no. 4891, pp. 616 – 621. 2. Deevi S.C., Sikka V.K. Nickel and iron aluminides: an overview on properties, processing, and applications. Intermetallics. 1996, no. 4, pp. 357–375. 3. Toshio M., Toshiyuki H. Effects of unidirectional solidification conditions on the microstructure and tensile properties of Ni 3 Al. Intermetallics. 1995, no. 3, pp. 23–33. 4. Grinberg B.A., Ivanov M.A . Intermetallidy Ni 3 Al i TiAl: mikrostruktura, deformacionnoe povedenie [Intermetallic compounds Ni 3 Al and TiAl: microstructure, deformation behavior]. Yekaterinburg, Ural Branch of RAS Publ., 2002. 360 p. 5. Ovcharenko V.E., Perevalova O.B. Fizika i himija obrabotki materialov , 2007, no. 4, pp. 78-82. 6. Tokita M. Trends inAdvanced SPS (Spark Plasma Sintering) Systems and Technology. Journal of the Society of Powder Technology, Japan. 1993, Vol. 30, no. 11, pp. 790-804. 7. Groza J.R., Zavaliangos A. Nanostructures bulk solids by field activated sintering. Reviews on advanced materials science. 2003, Vol. 5, no. 1, pp. 24-33. 8. Sivakumar R., Doni Jayaseelan D., Nishikawa T., Honda S., Awaji H. Mullite-molybdenum composites fabricated by pulse electric current sintering technique. Journal of the European Ceramic Society. 2002, Vol. 22, pp. 761-768. 9. Doni Jayaseelan D., Amutha Rani D., Nishikawa T., Awaji H., Ohji T. Sintering and microstructure of mullite-Mo composites. Journal of the European Ceramic Society. 2002, Vol. 22, pp. 1113-1117. 10. Lu X., He X.B., Zhang B., Zhang L., Qu X.H., Guo Z.X. Microstructure and mechanical properties of a spark plasma sintered Ti–45Al–8.5Nb–0.2W–0.2B–0.1Y alloy. Intermetallics. 2009, no. 17, pp. 840–846.