par Bottelier, Paul 
;Bouillon, Florent
Référence Journal of crystal growth, 13-14, C, page (823-826)
Publication Publié, 1972
;Bouillon, Florent Référence Journal of crystal growth, 13-14, C, page (823-826)
Publication Publié, 1972
Article révisé par les pairs
| Résumé : | Copper-nickel single crystals, in which the concentration Co of nickel ranges between 102 and 105 ppm, are grown from the melt by the Bridgman technique. Selective oxidation of the nickel in those crystals reveals a characteristic cellular structure, which can be related to constitutional supercooling. This is quite similar to many other alloys previously studied, in which the solute lowers the melting point of the solvent. According to Tiller's criteria, a plane interface should be stable for concentrations of nickel lower than 103 ppm. By means of selective oxidation in alloys containing 102 ppm of solute, no cellular segregation can be detected, though this technique is more sensitive than others used in this work, such as the autoradiography of 63Ni, the electron microprobe and the electron scanning microscope. © 1972. |
