Obrabotka Metallov 2014 No. 3

ОБРАБОТКА МЕТАЛЛОВ № 3 (64) 2014 26 МАТЕРИАЛОВЕДЕНИЕ Т.Ф. Григорьева, Б.Б. Бохонов, М.Р. Шарафутдинов, А.П. Баринова, Н.З. Ляхов // Физика горения и взры- ва. – 2003. – Т. 39, № 1. – С. 60–68. 15. Filimonov V.Yu., Korchagin M.A., Lyakhov N.Z. Kinetics of mechanically activated high temperature syn- thesis of Ni 3 Al in the thermal explosion mode // Interme- tallics. – 2011. – Vol. 19, iss. 7. – P. 833–840. 16. Рогачев А.С., Myкасьян А.С. Горение для син- теза материалов: введение в структурную макроки- нетику. – М.: Физматлит, 2012. – 400 с. 17. Shee S.K., Pradhan S.K., De M. Effect of alloy- ing on the microstructure and mechanical properties of Ni 3 Al // Journal of Alloys and Compounds. – 1998. – Vol. 265, № 1-2. – P. 249–256. 18. Spark Plasma Sintering of nanoscale (Ni+Al) powder mixture / J.S. Kim, H.S. Choi, D. Dudina, J.K. Lee, Y.S. Kwon // Solid State Phenomena. – 2007. – Vol. 119. – P. 35–38. 19. Колачёв Б.А., Елагин В.И., Ливанов В.А. Ме- талловедение и термическая обработка цветных ме- таллов и сплавов. – М.: МИСИС, 1999. – 416 с. 20. Morsi K. Review: reaction synthesis processing of Ni-Al intermetallic materials // Materials Science and Engineering A. – 2001. – Vol. 299, № 1-2. – P. 1–15. OBRABOTKAMETALLOV (METAL WORKING AND MATERIAL SCIENCE) N 3(64), July – September 2014, Pages 21–27 Structure and mechanical properties of Ni 3 Al intermetallic, fabricated by spark plasma sintering of mechanically activated «Ni - Al» powder mixtures Shevtsova L.I. , Post-graduate Student Novosibirsk State Technical University, 20 Prospect K. Marksa, Novosibirsk, 630073, Russian Federation Abstract The structure and mechanical properties of Ni 3 Al intermetallic are studied. The materials are fabricated according to different schemes, which combined mechanical activation of Ni andAl powders, self-propagating high temperature synthesis (SHS) and spark plasma sintering (SPS). It is found that Ni 3 Al intermetallics, fabricated by SPS using three different routes, have relative density of about 97 % and high values of mechanical properties compared to similar materials, obtained by conventional methods. Microhardness of the sintered samples range from 6100 to 6300 MPa. The value of flexural strength of all sintered samples is equal to 800 MPa. Spark plasma sintering of 86.71 % wt. Ni and 13.29 % wt. Al powders at 1100 °C leads to the formation of the material with the highest level of tensile strength equal to 400 MPa. This process was the most fast and efficient. It combines the chemical interaction of reagents with the sintering process. Keywords: intermetallic, nickel aluminide, spark plasma sintering, mechanical activation. 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, vol. 4, no. 5, pp. 357-375. doi: 10.1016/0966-9795(95)00056-9 3. Grinberg B.A., Ivanov M.A. Intermetallidy Ni 3 Al i TiAl: mikrostruktura, deformatsionnoe povedenie [Intermetallic Ni 3 Al and TiAl: microstructure, deformation behavior]. Yekaterinburg, Russian Academy of Sciences (Ural Branch), 2002. 360 p. 4. Toshio Mawari, Toshiyuki Hirano. Effects of unidirectional solidification conditions on the microstructure and tensile properties of Ni 3 Al. Intermetallics, 1995, vol. 3, iss. 1, pp. 23-33. doi: 10.1016/0966-9795(94)P3683-F 5. OvcharenkoV.E., Perevalova O.B. Evolyutsiya zerennoi struktury pri ekstruzii intermetallicheskogo soedineniya Ni 3 Al v protsesse vysokotemperaturnogo sinteza pod davleniem. II. Eksperimental’nye dannye [The evolution of grain structure during extrusion Ni 3 Al intermetallic compound during high-pressure synthesis. II. Experimental data]. Fizika i khimiya obrabotki materialov – Inorganic Materials: Applied Research , 2007, no. 4, pp. 78-82.