Compositional partitioning during early stages of oxidation of a uranium-molybdenum alloy

被引：7
|
作者：
Kautz, Elizabeth J. [1 ]
Lambeets, Sten, V [1 ]
Royer, Jacqueline [1 ]
Perea, Daniel E. [1 ]
Harilal, Sivanandan S. [1 ]
Devaraj, Arun [1 ]
机构：
[1] Pacific Northwest Natl Lab, Richland, WA 99352 USA
来源：
SCRIPTA MATERIALIA | 2022年 / 212卷
关键词：
Oxidation; Uranium; U-Mo; Atom probe tomography; Corrosion; NIOBIUM ALLOY; LIQUID WATER; CORROSION; NB; DIOXIDE;
D O I：
10.1016/j.scriptamat.2022.114528
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Compositional partitioning during uranium alloy oxidation was studied via complementary ex situ -in situ atom probe tomography. Nanoscopic volumes of uranium-22 at. % molybdenum were exposed to air at room temperature/atmospheric pressure for 30-60 minutes (ex situ), and 300 degrees C -10(-5) mbar O-2 gas for 2-5 minutes in a chemical reaction chamber attached to an atom probe system (in situ). For all environmental conditions, a hypostoichiometric uranium oxide is formed. Reaction fronts are observed at oxide/metal, oxide/hydride, and outer oxide/environment interfaces. Results reveal Mo redistributes across the oxide/metal interface, with a tendency for enrichment in the outer oxide. The formation of a hydrogen-rich subsurface layer between the oxide and base alloy accompanies oxidation in both air and oxygen gas environments. Carbon and silicon impurity elements also redistribute to the outer oxide, contributing to oxide film composition.(c) 2022 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页数：6
相关论文
共 50 条
  • [31] Nanoscale Studies of the Early Stages of Oxidation of a TiAl-Base Alloy
    H. L. Du
    P. K. Datta
    Z. Klusek
    J. S. Burnell-Gray
    Oxidation of Metals, 2004, 62 : 175 - 193
  • [32] Nanoscale studies of the early stages of oxidation of a TiAl-base alloy
    Du, HL
    Datta, PK
    Klusek, Z
    Burnell-Gray, JS
    OXIDATION OF METALS, 2004, 62 (3-4): : 175 - 193
  • [33] On the early stages of precipitation during direct ageing of Alloy 718
    Theska, F.
    Nomoto, K.
    Godor, F.
    Oberwinkler, B.
    Stanojevic, A.
    Ringer, S. P.
    Primig, S.
    ACTA MATERIALIA, 2020, 188 : 492 - 503
  • [34] The Effect of Ti on the Early Stages of Oxidation of an Alumina-Forming NiCrAl Alloy
    Talia L. Barth
    Emmanuelle A. Marquis
    Oxidation of Metals, 2019, 92 : 13 - 26
  • [35] The Effect of Ti on the Early Stages of Oxidation of an Alumina-Forming NiCrAl Alloy
    Barth, Talia L.
    Marquis, Emmanuelle A.
    OXIDATION OF METALS, 2019, 92 (1-2): : 13 - 26
  • [36] Non-equilibrium oxidation states of zirconium during early stages of metal oxidation
    Ma, Wen
    Herbert, F. William
    Senanayake, Sanjaya D.
    Yildiz, Bilge
    APPLIED PHYSICS LETTERS, 2015, 106 (10)
  • [37] Microstructural evolution of 7012 alloy during the early stages of artificial ageing
    Ferragut, R
    Somoza, A
    Tolley, A
    ACTA MATERIALIA, 1999, 47 (17) : 4355 - 4364
  • [38] The early stages of high temperature oxidation of an Al-0.5wt%Mg alloy
    Shimizu, K
    Brown, GM
    Kobayashi, K
    Skeldon, P
    Thompson, GE
    Wood, GC
    CORROSION SCIENCE, 1998, 40 (4-5) : 557 - 575
  • [39] Modelling compositional changes in nickel base alloy 602 CA during high temperature oxidation
    Chyrkin, A.
    Sloof, W. G.
    Pillai, R.
    Galiullin, T.
    Gruener, D.
    Singheiser, L.
    Quadakkers, W. J.
    MATERIALS AT HIGH TEMPERATURES, 2015, 32 (1-2) : 102 - 112
  • [40] Syndepositional Uptake of Uranium, Molybdenum and Vanadium into Modern Bahamian Carbonate Sediments during Early Diagenesis
    Magette, Evan
    Turner, Adam
    Peng, Yongbo
    Herrmann, Achim D.
    GEOSCIENCES, 2023, 13 (03)
12345