Title
Site Preference And Diffusion In Ni3Al Alloyed With Ir, Ta Or Re At 1200°C
Keywords
Interdiffusion coefficients; L1 ordered structure 2; Ni3al intermetallic
Abstract
Diffusion in L12-Ni3Al with ternary alloying additions of Ir, Ta and Re was investigated at 1200°C using solid-to-solid diffusion couples, and examined with respect to site preference in ordered intermetallic compound. In addition to determination of average ternary interdiffusion coefficients [1-3], average effective interdiffusion coefficients were determined directly from the experimental concentration profiles. Ni has the largest magnitude of average effective interdiffusion coefficient, followed by Al, Ir, Re and Ta. The average effective interdiffusion coefficients for Ir, Re and Ta are much smaller than those for Ni and Al. Tracer diffusion coefficients determined by extrapolation technique, and available literature also followed the same trend. The relative tendency of Ni, Al, Ir, Re and Ta to occupy the α-Ni and β-Al sites are correlated to these diffusion coefficients, with due consideration for diffusion mechanisms and coordination of atoms. © (2010) Trans Tech Publications.
Publication Date
1-1-2010
Publication Title
Defect and Diffusion Forum
Volume
297-301
Number of Pages
1322-1327
Document Type
Article; Proceedings Paper
Personal Identifier
scopus
DOI Link
https://doi.org/10.4028/www.scientific.net/DDF.297-301.1322
Copyright Status
Unknown
Socpus ID
77952280599 (Scopus)
Source API URL
https://api.elsevier.com/content/abstract/scopus_id/77952280599
STARS Citation
Garimella, N.; Choi, H. J.; and Sohn, Y. H., "Site Preference And Diffusion In Ni3Al Alloyed With Ir, Ta Or Re At 1200°C" (2010). Scopus Export 2010-2014. 1741.
https://stars.library.ucf.edu/scopus2010/1741