ISSN:
0142-2421
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Physics
Notes:
CoO and NiO single crystals doped with chromium were either quenched or slowly cooled after 1 week of annealing at 1150° C and 1200° C in argon. SIMS analysis of the Cr surface distribution revealed a remarkably high Cr concentration in the near-surface layers of slowly cooled samples and a much smaller concentration for the quenched crystals. The differences of surface Cr concentration in various quenching procedures are also shown.By applying subequilibrium annealing times, different Cr segregation levels and varying thicknesses of surface layers could be established. The time of annealing necessary to obtain equilibrium of segregation was determined for both solid solutions.
Additional Material:
12 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/sia.740180406
