Convergent beam electron diffraction analysis of theT
1 (Al2CuLi) phase in Al-Li-Cu alloys |
| |
| Authors: | Kenneth S Vecchio David B Williams |
| |
| Affiliation: | (1) Department of Applied Mechanics and Engineering Sciences, University of California- San Diego, 92023 La Jolla, CA;(2) Department of Materials Science and Engineering, Lehigh University, 18015 Bethlehem, PA |
| |
| Abstract: | Point and space group analysis of largeT
1 (Al2CuLi) crystals was performed by convergent beam electron diffraction. The structure ofT
1 was determined to be hexagonal, possessing a 6/mmm point group and P6/mmm (No. 191) space group. The lattice constants were
found to bea ≈ 0.497 nm andc ≈ 0.93 nm. This structure is in agreement with an existing model of T1, although discrepancies between the observed and calculated intensities of certain reflections were evident. Electron probe
X-ray microanalysis of theseT
1 crystals indicates the composition is on the copper-rich side of stoichiometric Al2CuLi. The slight deviation in the composition ofT
1 from stoichiometry and the presence of planar defects in the microstructure may account for the discrepancy in the intensity
of certain reflections. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
