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XPS study of surface‐active organic compounds on fine ferrous powder
Author(s) -
Johansson Elisabeth,
Nyborg Lars
Publication year - 2000
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/1096-9918(200008)30:1<333::aid-sia843>3.0.co;2-h
Subject(s) - x ray photoelectron spectroscopy , ferrous , chemistry , materials science , chemical engineering , environmental chemistry , metallurgy , engineering
Controlled adsorption of organic probe molecules in liquid solutions provides information on the interaction between powder and surface‐active additives used in metal injection moulding (MIM). The adsorption of such compounds onto stainless‐steel powder and carbonyl iron powder is evaluated by means of XPS. Stearic acid is adsorbed on gas‐atomized stainless‐steel powder covered mainly by basic manganese oxide. The basic molecule aniline is adsorbed on water‐atomized stainless‐steel powder having an Si‐rich acidic surface oxide. This adsorption takes place preferentially on the silicon oxide. On slightly SiO 2 ‐coated carbonyl iron powder, stearic acid as well as aniline are adsorbed. Copyright © 2000 John Wiley & Sons, Ltd.