Continuous solid solution of {kappa}-phase in the third period transition metals-aluminum-carbon pseudo-ternary systems
Phase stability of {kappa}-phases (perovskite-type phases) was studied in the third-period transition-metals (M: Mn to Cu) - aluminum (Al) - carbon (C) systems. The concentrations of transition metals (C{sub M}) were systematically changed from 60mol%Mn to 20mol%Ni+40mol%Cu along the periodic table under the constant nominal alloy compositions of C{sub M1}+C{sub M2} = 60mol%, C{sub Al} = 20mol% and C{sub C} = 20mol%. Alloys were prepared using mechanical alloying and hot pressing. Constituent phases were investigated by X-ray diffraction analysis, scanning electron microscopy and electron probe microanalysis. It is confirmed that Mn{sub 3}Al(C,O){sub 0.95}, Fe{sub 3}Al(C,O){sub 0.87}, Co{sub 3}Al(C,O){sub 0.6} and Ni{sub 3}Al(C,O){sub 0.26} exist in their ternary systems where oxygen is introduced during the process. Also, only one {kappa}-phase is recognized in an alloy having an intermediate composition in every system. This suggests that continuous solid solutions between these {kappa}-phases are formed in the pseudo-ternary systems. Composition dependence of lattice parameter is discussed.
- Research Organization:
- Tohoku Univ., Sendai (JP)
- Sponsoring Organization:
- Japanese Ministry of Education, Science, Sports, and Culture
- OSTI ID:
- 20001660
- Report Number(s):
- CONF-981104-; ISBN 1-55899-458-0; ISSN 1067-9995; TRN: IM0001%%97
- Resource Relation:
- Conference: High-Temperature Ordered Intermetallic Alloys VIII, Materials Research Society Symposium Proceedings, Boston, MA (US), 11/30/1998--12/03/1998; Other Information: PBD: 1999; Related Information: In: High-temperature ordered intermetallic alloys VIII. Materials Research Society symposium proceedings: Volume 552, by George, E.P.; Mills, M.J.; Yamaguchi, Masaharu [eds.], [600] pages.
- Country of Publication:
- United States
- Language:
- English
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