A proposed new structure for GPB2/ S" in Al-Cu-Mg alloys
Wang, S.C. and Starink, M.J. (2004) A proposed new structure for GPB2/ S" in Al-Cu-Mg alloys. In, McVitie, S. and McComb, D. (eds.) Electron Microscopy and Analysis 2003: Proceedings of the Institute of Physics Electron Microscopy and Analysis Group Conference, 3-5 September 2003. Electron Microscopy and Analysis 2003: Institute of Physics Electron Microscopy and Analysis Group Conference London, UK, Chemical Rubber Company Press, 277-280. (Institute of Physics Conference Series 179).
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Based on previously published HREM work, we propose a new structure for the ordered GPB2/ S" phase with a composition of Al10Cu3Mg3, which is aluminium-rich compared to S phase (Al2CuMg). The proposed structure is coherent with the f.c.c. Al matrix and is formed by the replacement of some Al atoms with Cu/Mg, and has a orthorhombic structure (space group Imm2) and the lattice parameters of a = 0.405 nm, b = 1.62 nm and c = 0.405 nm. The HREM simulation and reflection intensities based on this structure match the experimental image and diffraction patterns.
|Item Type:||Book Section|
|Additional Information:||ISSN 0951-3248|
|Subjects:||T Technology > TN Mining engineering. Metallurgy
T Technology > TA Engineering (General). Civil engineering (General)
|Divisions:||University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
|Date Deposited:||06 Sep 2006|
|Last Modified:||27 Mar 2014 18:23|
|Publisher:||Chemical Rubber Company Press|
|RDF:||RDF+N-Triples, RDF+N3, RDF+XML, Browse.|
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