The temperature and crystallographic dependence of surface segregation in a 50% NiCo alloy

The crystallographic dependence of the surface segregation of a 50% CoNi alloy was determined over a temperature range from 870 to 1100 K. It was found that Ni segregates for all three surfaces. The heat and entropy of segregation were determined for each face. It is noted that the entropy of segre...

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Veröffentlicht in:	Surface science 1993-11, Vol.297 (2), p.186-192
Hauptverfasser:	Hajcsar, E.E., Underhill, P.R., Smeltzer, W.W.
Format:	Artikel
Sprache:	eng
Schlagworte:	Applied sciences Condensed matter: structure, mechanical and thermal properties Diffusion interface formation Exact sciences and technology Metals. Metallurgy Physics Solid surfaces and solid-solid interfaces Surfaces and interfaces thin films and whiskers (structure and nonelectronic properties)
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Zusammenfassung:	The crystallographic dependence of the surface segregation of a 50% CoNi alloy was determined over a temperature range from 870 to 1100 K. It was found that Ni segregates for all three surfaces. The heat and entropy of segregation were determined for each face. It is noted that the entropy of segregation is not negligible as is commonly assumed.
ISSN:	0039-6028 1879-2758
DOI:	10.1016/0039-6028(93)90262-I