ISSN:
1436-5073
Keywords:
Key words: Analytical electron microscopy; EDX microanalysis; discontinuous dissolution; solute redistribution.
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract. High spatial resolution X-ray microanalysis of thin foils in a transmission electron microscope has been used for the first time to examine the residual solute content profiles resulting from the discontinuous dissolution reaction in a Ni-4 at. % Sn alloy. The sharp change in the Sn content, detected performing the line scans across the reaction front, indicated that the solute redistribution occurred just at the reaction front. The Sn profiles measured along the reaction front were the reverse of those typical for the discontinuous precipitation reaction, with a relatively higher excess amount of tin stored close to the position where the Ni3Sn lamellae had previously existed. The obtained results also suggest that the chemistry and shape of profiles are not only dependent on the dissolution temperature, but that the initial state of the single cell just before the beginning of the discontinuous dissolution reaction plays an important role.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/s006040050022
Permalink