Copper concentration inside Guinier-Preston I zones formed in an Al –Cu alloy
-
M. Takeda
,
Y. Nagura
Abstract
The copper concentration inside a Guinier-Preston (GPI) zone was studied by means of an extended Hückel molecular orbital (EHMO) calculation. The present EHMO calculation revealed that the Cu concentration inside a GPI zone depends on the size of the zone. The GPI zone comprises both Cu and Al in a small GPI zone, whereas the Cu concentration inside the GPI zone increases to nearly 100 at.% Cu in a large GPI zone. A compressive lattice distortion, which is associated with the zone, increases the stability, but when a GPI zone is 5 nm in diameter, the stabilizing effect of the zone is estimated to be not higher than 10% of the chemical energy due to Cu coalescence.
References
1 Guinier, A.: Nature (London) 142 (1938) 569.10.1038/142569b0Search in Google Scholar
2 Preston, G.D.: Phil. Mag. 26 (1938) 855.10.1080/14786443808562177Search in Google Scholar
3 Scripta Metall. 22(7) (1988)Search in Google Scholar
4 Gerold, V.: Z. Metallkd. 45 (1954) 593 and 599.Search in Google Scholar
5 Gerold, V.; Bubeck, E.; Scripta Metall. 22 (1988) 953.10.1016/S0036-9748(88)80082-6Search in Google Scholar
6 James, D.R.; Liedl, G.L.: Acta Cryst.18 (1965) 678.10.1107/S0365110X6500155XSearch in Google Scholar
7 Fontaine, A.; Lagarde, P.; Naudon, A.; Raoux, D.; Spanjaard, D.: Phil. Mag., 40 (1979) 17.10.1080/01418637908226489Search in Google Scholar
8 Hono, K.; Hashizume, T.; Hasegawa, Y.; Hirano, K.; Sakurai, T.: Scripta Metall. 20 (1986) 487.10.1016/0036-9748(86)90240-1Search in Google Scholar
9 Jouffrey, B.; Karlik, M.: Microsc. Microanal. Microstruct. 3 (1992) 243.10.1051/mmm:0199200302-3024300Search in Google Scholar
10 Karlik, M.; Jouffrey, B.; Belliot, S.: Acta Mater. 46 (1998) 1817.10.1016/S1359-6454(97)00342-XSearch in Google Scholar
11 Takeda, M.; Oka, H.; Onaka, I.: phys. stat. sol. (a) 132 (1992) 305.10.1002/pssa.2211320207Search in Google Scholar
12 Yamamoto, S.; Mizuno, M.; Kobayashi, H.: J. Japan Inst. Metals 57 (1993) 402.10.2320/jinstmet1952.57.4_402Search in Google Scholar
13 Hoffmann, R.: Solids and Surfaces, VCH, Weinheim (1988).Search in Google Scholar
14 Takeda, M.; Kikuchi, T.; Makihara, S.: J. Mat. Sci. Lett. 18 (1999) 631.10.1023/A:1006655103558Search in Google Scholar
© 2002 Carl Hanser Verlag, München
Articles in the same Issue
- Frontmatter
- Articles/Aufsätze
- Strain rate dependence of the deformation mechanisms in a fully lamellar γ-TiAl-based alloy
- Experimental and thermodynamic assessment of the Fe –Gd–Zr system
- Phase diagram of the Fe –Co –Ti system at 1073 K
- Copper concentration inside Guinier-Preston I zones formed in an Al –Cu alloy
- Identification of precipitates in 6013 aluminum alloy (Al –Mg –Si –Cu)
- Redistribution of phosphorus and carbon in steel weldments
- Microstructure and compressive properties of in situ synthesized TiC/Ti composites
- Effect of Al on the glass forming ability of Zr–Ni –Cu–Al alloys
- Fcc-hcp transformation-related internal friction in Fe –Mn alloys
- High-temperature stress and strain partitioning in duplex stainless steel
- Load sequence effects in the high cycle fatigue of two ferrite-pearlite microalloyed steels
- Characterization of intermetallic compounds formed during the interfacial reactions of liquid Sn and Sn– 58Bi solders with Ni substrates
- Notifications/Mitteilungen
- Personal/Personelles
Articles in the same Issue
- Frontmatter
- Articles/Aufsätze
- Strain rate dependence of the deformation mechanisms in a fully lamellar γ-TiAl-based alloy
- Experimental and thermodynamic assessment of the Fe –Gd–Zr system
- Phase diagram of the Fe –Co –Ti system at 1073 K
- Copper concentration inside Guinier-Preston I zones formed in an Al –Cu alloy
- Identification of precipitates in 6013 aluminum alloy (Al –Mg –Si –Cu)
- Redistribution of phosphorus and carbon in steel weldments
- Microstructure and compressive properties of in situ synthesized TiC/Ti composites
- Effect of Al on the glass forming ability of Zr–Ni –Cu–Al alloys
- Fcc-hcp transformation-related internal friction in Fe –Mn alloys
- High-temperature stress and strain partitioning in duplex stainless steel
- Load sequence effects in the high cycle fatigue of two ferrite-pearlite microalloyed steels
- Characterization of intermetallic compounds formed during the interfacial reactions of liquid Sn and Sn– 58Bi solders with Ni substrates
- Notifications/Mitteilungen
- Personal/Personelles
