caa a22 4500 467949565 CHVBK 20180322200725.0 cr unu---uuuuu 170328e19861101xx s 000 0 eng 10.1007/BF02431624 doi (NATIONALLICENCE)springer-10.1007/BF02431624 (NATIONALLICENCE)springer-10.1007/BF00553441 Ordered domain characterization in α-Cu-Al alloys from dissolution kinetics studies [Elektronische Daten] [Ari Varschavsky, Eduardo Donoso] Through microcalorimetric experiments, disperse order (DO) dissolution kinetics in preannealedα-Cu-Al alloys containing 19, 13 and 6.5 at % aluminium were adequately described by the integrated kinetic model function arising from the steady-state part of the diffusion field:f(y)=1 − (1−y) 2/3. Domain sizes after the annealing treatment, and also critical radii, were determined from differential scanning calorimetry data analysis at different heating rates. The existence of critical radii indicates that the disperse-order dissolution process is a first-order transition. Nevertheless, it was inferred that for very dilute alloys, only short-range order is present. After pre-annealing the alloys at different temperatures, volume fractions and domain concentrations were computed by employing the above kinetic model under high heating-rate conditions. On the basis of appropriate time constant and diffusion time calculations, the range of such temperatures compatible with equilibrium attainment was established. Prolonged pre-anneals alter the particle distribution, but do not influence either volume fractions or domain sizes. A semi-quantitative particle radius-particle concentration-temperature diagram was proposed forα-Cu-Al alloys. Chapman and Hall Ltd., 1986 Varschavsky Ari Universidad de Chile, Facultad de Ciencias Físicas y Matemáticas, Instituto de Investigaciones y Ensayes de Materiales (IDIEM), Casilla 1420, Santiago, Chille aut Donoso Eduardo Universidad de Chile, Facultad de Ciencias Físicas y Matemáticas, Instituto de Investigaciones y Ensayes de Materiales (IDIEM), Casilla 1420, Santiago, Chille aut Journal of Materials Science Kluwer Academic Publishers 21/11(1986-11-01), 3873-3883 0022-2461 21:11<3873 1986 21 10853 https://doi.org/10.1007/BF02431624 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02431624 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Varschavsky Ari Universidad de Chile, Facultad de Ciencias Físicas y Matemáticas, Instituto de Investigaciones y Ensayes de Materiales (IDIEM), Casilla 1420, Santiago, Chille aut NATIONALLICENCE 700 1- Donoso Eduardo Universidad de Chile, Facultad de Ciencias Físicas y Matemáticas, Instituto de Investigaciones y Ensayes de Materiales (IDIEM), Casilla 1420, Santiago, Chille aut NATIONALLICENCE 773 0- Journal of Materials Science Kluwer Academic Publishers 21/11(1986-11-01), 3873-3883 0022-2461 21:11<3873 1986 21 10853 NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00553441 text/html Onlinezugriff via DOI Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE NATIONALLICENCE NL-springer