Oxidation mechanism of refractory Molybdenum exposed to oxygen-saturated lead-bismuth eutectic at 600 °C

Wande Cairang; Shengqiang Ma; Xing Gong; Yi Zeng; Hejie Yang; Dezhen Xue; Yuanbin Qin; Xiangdong Ding; Jun Sun

doi:10.1016/j.corsci.2020.109132

Oxidation mechanism of refractory Molybdenum exposed to oxygen-saturated lead-bismuth eutectic at 600 °C

Wande Cairang
, Shengqiang Ma
, Xing Gong
, Yi Zeng
, Hejie Yang
, Dezhen Xue
, Yuanbin Qin
, Xiangdong Ding
, Jun Sun

School of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

37 Scopus citations

Abstract

The oxidation mechanism of refractory Molybdenum exposed to oxygen-saturated lead-bismuth eutectic (LBE) at 600 °C was investigated. The results show a hierarchical structure of multiple corrosion layers. Specifically, a nanostructured tetragonal MoO₂ is the first scale that forms on the Mo substrate, followed by development of an ultrafine-grained tetragonal lead molybdate (PbMoO₄) layer. On the top of this ultrafine-grained layer, there is a thicker scale that consists of micron-sized columnar PbMoO₄ and its upper part can be further oxidized into blocky monoclinic-structured Pb₂MoO₅. The formation of these multilayered scales is likely predominated by inward diffusion of oxygen and Pb.

Original language	English
Article number	109132
Journal	Corrosion Science
Volume	179
DOIs	https://doi.org/10.1016/j.corsci.2020.109132
State	Published - Feb 2021

Keywords

Interfaces
Lead-bismuth eutectic (LBE)
Microstructure
Molybdenum
Oxidation

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10.1016/j.corsci.2020.109132

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title = "Oxidation mechanism of refractory Molybdenum exposed to oxygen-saturated lead-bismuth eutectic at 600 °C",

abstract = "The oxidation mechanism of refractory Molybdenum exposed to oxygen-saturated lead-bismuth eutectic (LBE) at 600 °C was investigated. The results show a hierarchical structure of multiple corrosion layers. Specifically, a nanostructured tetragonal MoO2 is the first scale that forms on the Mo substrate, followed by development of an ultrafine-grained tetragonal lead molybdate (PbMoO4) layer. On the top of this ultrafine-grained layer, there is a thicker scale that consists of micron-sized columnar PbMoO4 and its upper part can be further oxidized into blocky monoclinic-structured Pb2MoO5. The formation of these multilayered scales is likely predominated by inward diffusion of oxygen and Pb.",

keywords = "Interfaces, Lead-bismuth eutectic (LBE), Microstructure, Molybdenum, Oxidation",

author = "Wande Cairang and Shengqiang Ma and Xing Gong and Yi Zeng and Hejie Yang and Dezhen Xue and Yuanbin Qin and Xiangdong Ding and Jun Sun",

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doi = "10.1016/j.corsci.2020.109132",

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AU - Cairang, Wande

AU - Ma, Shengqiang

AU - Gong, Xing

AU - Zeng, Yi

AU - Yang, Hejie

AU - Xue, Dezhen

AU - Qin, Yuanbin

AU - Ding, Xiangdong

AU - Sun, Jun

PY - 2021/2

Y1 - 2021/2

N2 - The oxidation mechanism of refractory Molybdenum exposed to oxygen-saturated lead-bismuth eutectic (LBE) at 600 °C was investigated. The results show a hierarchical structure of multiple corrosion layers. Specifically, a nanostructured tetragonal MoO2 is the first scale that forms on the Mo substrate, followed by development of an ultrafine-grained tetragonal lead molybdate (PbMoO4) layer. On the top of this ultrafine-grained layer, there is a thicker scale that consists of micron-sized columnar PbMoO4 and its upper part can be further oxidized into blocky monoclinic-structured Pb2MoO5. The formation of these multilayered scales is likely predominated by inward diffusion of oxygen and Pb.

AB - The oxidation mechanism of refractory Molybdenum exposed to oxygen-saturated lead-bismuth eutectic (LBE) at 600 °C was investigated. The results show a hierarchical structure of multiple corrosion layers. Specifically, a nanostructured tetragonal MoO2 is the first scale that forms on the Mo substrate, followed by development of an ultrafine-grained tetragonal lead molybdate (PbMoO4) layer. On the top of this ultrafine-grained layer, there is a thicker scale that consists of micron-sized columnar PbMoO4 and its upper part can be further oxidized into blocky monoclinic-structured Pb2MoO5. The formation of these multilayered scales is likely predominated by inward diffusion of oxygen and Pb.

KW - Interfaces

KW - Lead-bismuth eutectic (LBE)

KW - Microstructure

KW - Molybdenum

KW - Oxidation

UR - https://www.scopus.com/pages/publications/85097243817

U2 - 10.1016/j.corsci.2020.109132

DO - 10.1016/j.corsci.2020.109132

M3 - 文章

AN - SCOPUS:85097243817

SN - 0010-938X

VL - 179

JO - Corrosion Science

JF - Corrosion Science

M1 - 109132

ER -

Oxidation mechanism of refractory Molybdenum exposed to oxygen-saturated lead-bismuth eutectic at 600 °C

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Keywords

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