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Title: Surface characterization and reactivity of a nitrogen atomized 304L stainless steel powder

Abstract

The oxide layer on the surface of the particles of a nitrogen atomized 304L stainless steel powder was quantitatively characterized using X-ray photoelectron spectroscopy (XPS), secondary-ion microprobe (IMP) analysis, selective reduction of surface iron oxide by hydrogen, and chemical analysis for total oxygen, all as a function of particle size. The composition and thickness of the oxide layer do not depend significantly on particle size. A 5.8-nm-thick outer layer made of MnO and Fe[sub 2]O[sub 3] islands covers a 2.4-nm-thick inner layer of Cr[sub 2]O[sub 3]. The reaction of the powder with O[sub 2] impurity in either H[sub 2] or N[sub 2] exhibits different kinetics and mechanism in both cases. In H[sub 2], a selective oxidation of the alloying elements Mn, Cr, and Si takes place above 400 C with a parabolic isothermal rate law. In N[sub 2], iron also is oxidized, isolated Fe[sub 2]O[sub 3]-rich microcrystals form over a Cr[sub 2]O[sub 3]-rich uniform underlayer, and the isothermal kinetics are accelerated.

Authors:
;  [1]
  1. (Univ. of Burgandy, Dijon (France). Lab. for the Reactivity of Solids)
Publication Date:
OSTI Identifier:
7274370
Resource Type:
Journal Article
Journal Name:
Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States)
Additional Journal Information:
Journal Volume: 25:3; Journal ID: ISSN 0360-2133
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CORROSION PRODUCTS; CHEMICAL COMPOSITION; STAINLESS STEEL-304L; OXIDATION; ACTIVATION ENERGY; CHEMICAL REACTION KINETICS; CHROMIUM OXIDES; IRON OXIDES; MANGANESE OXIDES; POWDER METALLURGY; SILICON OXIDES; ALLOYS; AUSTENITIC STEELS; CHALCOGENIDES; CHEMICAL REACTIONS; CHROMIUM ALLOYS; CHROMIUM COMPOUNDS; CHROMIUM-NICKEL STEELS; CORROSION RESISTANT ALLOYS; ENERGY; HEAT RESISTANT MATERIALS; HEAT RESISTING ALLOYS; HIGH ALLOY STEELS; IRON ALLOYS; IRON BASE ALLOYS; IRON COMPOUNDS; KINETICS; LOW CA; MANGANESE COMPOUNDS; MATERIALS; METALLURGY; NICKEL ALLOYS; OXIDES; OXYGEN COMPOUNDS; REACTION KINETICS; SILICON COMPOUNDS; STAINLESS STEELS; STEEL-CR19NI10-L; STEELS; TRANSITION ELEMENT COMPOUNDS; 360105* - Metals & Alloys- Corrosion & Erosion

Citation Formats

Bracconi, P., and Gasc, G. Surface characterization and reactivity of a nitrogen atomized 304L stainless steel powder. United States: N. p., 1994. Web. doi:10.1007/BF02651592.
Bracconi, P., & Gasc, G. Surface characterization and reactivity of a nitrogen atomized 304L stainless steel powder. United States. doi:10.1007/BF02651592.
Bracconi, P., and Gasc, G. Tue . "Surface characterization and reactivity of a nitrogen atomized 304L stainless steel powder". United States. doi:10.1007/BF02651592.
@article{osti_7274370,
title = {Surface characterization and reactivity of a nitrogen atomized 304L stainless steel powder},
author = {Bracconi, P. and Gasc, G.},
abstractNote = {The oxide layer on the surface of the particles of a nitrogen atomized 304L stainless steel powder was quantitatively characterized using X-ray photoelectron spectroscopy (XPS), secondary-ion microprobe (IMP) analysis, selective reduction of surface iron oxide by hydrogen, and chemical analysis for total oxygen, all as a function of particle size. The composition and thickness of the oxide layer do not depend significantly on particle size. A 5.8-nm-thick outer layer made of MnO and Fe[sub 2]O[sub 3] islands covers a 2.4-nm-thick inner layer of Cr[sub 2]O[sub 3]. The reaction of the powder with O[sub 2] impurity in either H[sub 2] or N[sub 2] exhibits different kinetics and mechanism in both cases. In H[sub 2], a selective oxidation of the alloying elements Mn, Cr, and Si takes place above 400 C with a parabolic isothermal rate law. In N[sub 2], iron also is oxidized, isolated Fe[sub 2]O[sub 3]-rich microcrystals form over a Cr[sub 2]O[sub 3]-rich uniform underlayer, and the isothermal kinetics are accelerated.},
doi = {10.1007/BF02651592},
journal = {Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States)},
issn = {0360-2133},
number = ,
volume = 25:3,
place = {United States},
year = {1994},
month = {3}
}