Site preference determination in L1{sub 2} ternary intermetallic compounds Al{sub 3}Ti-X (X = Cr, Mn, Pd)
- Univ. of Osaka Prefecture, Sakai (Japan). Integrated Arts and Sciences
The intermetallic compound Al{sub 3}Ti is one of the most promising candidates of high temperature structural material because of its high melting temperature, low density and superior oxidation resistance. However, since Al{sub 3}Ti is brittle at low temperature, coming from a tetragonal D0{sub 22} structure with a lower symmetry than a cubic one, its application has been limited. One approach to improve a ductility of Al{sub 3}Ti is making its structure transform to a structurally related cubic L1{sub 2}, by adding a ternary element X to the Al{sub 3}Ti. The mechanical properties will be affected by the kind of ternary element and the atomic location on the L1{sub 2} lattice sites through a change in interatomic bonding between the neighboring atoms. Therefore, in order to understand the mechanism of their mechanical properties, it is an important problem to determine the site preferences of constituents atoms (Al, Ti and X). In the present work, the site preference was investigated for the alloys of Al{sub 3}Ti-Cr, Al{sub 3}Ti-Mn and Al{sub 3}Ti-Pd with L1{sub 2} structure, by applying the same method as mentioned above.
- OSTI ID:
- 139979
- Journal Information:
- Scripta Metallurgica et Materialia, Journal Name: Scripta Metallurgica et Materialia Journal Issue: 10 Vol. 29; ISSN SCRMEX; ISSN 0956-716X
- Country of Publication:
- United States
- Language:
- English
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