Premium
A study of the growth and dissolution of metastable precipitates in an Al–11.8 at. % Zn alloy
Author(s) -
Allen D.,
Messoloras S.,
Stewart R. J.,
Kostorz G.
Publication year - 1978
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889878013916
Subject(s) - dissolution , alloy , metastability , materials science , scattering , metallurgy , analytical chemistry (journal) , crystallography , chemistry , optics , chromatography , physics , organic chemistry
An Al‐11.8 at.% Zn alloy has been studied, under various thermal conditions, with the neutron small‐angle scattering apparatus (D11A) at the ILL. The sample was mounted in a furnace, so that alternate in situ growth and dissolution studies of metastable precipitates could be made. The samples were slowly cooled from 300°C to different fixed temperatures in the range from 25 to 200°C, and the decomposition was studied at these growth temperatures for aging times of up to several hours in each case. Subsequently, at the end of each growth experiment, the samples were rapidly heated to 300°C, and the dissolution was followed by taking a data set every 20 s. The scattering intensity in these dissolution experiments was found to decrease rapidly with time. so that in many cases the whole process was largely completed within a few minutes.