Fretting Wear Damage Mechanism of Uranium under Various Atmosphere and Vacuum Conditions
A fretting wear experiment with uranium has been performed on a linear reciprocating tribometer with ball-on-disk contact. This study focused on the fretting behavior of the uranium under different atmospheres (Ar, Air (21% O2 + 78% N2), and O2) and vacuum conditions (1.05 and 1 × 10&m...
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doaj-66c55f090a1b4867b2fccfebd5de52372020-11-24T21:07:35ZengMDPI AGMaterials1996-19442018-04-0111460710.3390/ma11040607ma11040607Fretting Wear Damage Mechanism of Uranium under Various Atmosphere and Vacuum ConditionsZhengyang Li0Zhenbing Cai1Yanping Wu2Xiandong Meng3Dongxu Zhang4Tribology Research Institute, Key Lab of Advanced Technologies of Materials, Southwest Jiaotong University, Chengdu 610031, ChinaTribology Research Institute, Key Lab of Advanced Technologies of Materials, Southwest Jiaotong University, Chengdu 610031, ChinaChina Academy of Engineering and Physics, Mianyang 621900, ChinaChina Academy of Engineering and Physics, Mianyang 621900, ChinaChina Academy of Engineering and Physics, Mianyang 621900, ChinaA fretting wear experiment with uranium has been performed on a linear reciprocating tribometer with ball-on-disk contact. This study focused on the fretting behavior of the uranium under different atmospheres (Ar, Air (21% O2 + 78% N2), and O2) and vacuum conditions (1.05 and 1 × 10−4 Pa). Evolution of friction was assessed by coefficient of friction (COF) and friction-dissipated energy. The oxide of the wear surface was evaluated by Raman spectroscopy. The result shows that fretting wear behavior presents strong atmosphere and vacuum condition dependence. With increasing oxygen content, the COF decreases due to abrasive wear and formation of oxide film. The COF in the oxygen condition is at least 0.335, and it has a maximum wear volume of about 1.48 × 107 μm3. However, the COF in a high vacuum condition is maximum about 1.104, and the wear volume is 1.64 × 106 μm3. The COF in the low vacuum condition is very different: it firstly increased and then decreased rapidly to a steady value. It is caused by slight abrasive wear and the formation of tribofilm after thousands of cycles.http://www.mdpi.com/1996-1944/11/4/607fretting wearwear mechanismatmosphereuranium |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Zhengyang Li Zhenbing Cai Yanping Wu Xiandong Meng Dongxu Zhang |
spellingShingle |
Zhengyang Li Zhenbing Cai Yanping Wu Xiandong Meng Dongxu Zhang Fretting Wear Damage Mechanism of Uranium under Various Atmosphere and Vacuum Conditions Materials fretting wear wear mechanism atmosphere uranium |
author_facet |
Zhengyang Li Zhenbing Cai Yanping Wu Xiandong Meng Dongxu Zhang |
author_sort |
Zhengyang Li |
title |
Fretting Wear Damage Mechanism of Uranium under Various Atmosphere and Vacuum Conditions |
title_short |
Fretting Wear Damage Mechanism of Uranium under Various Atmosphere and Vacuum Conditions |
title_full |
Fretting Wear Damage Mechanism of Uranium under Various Atmosphere and Vacuum Conditions |
title_fullStr |
Fretting Wear Damage Mechanism of Uranium under Various Atmosphere and Vacuum Conditions |
title_full_unstemmed |
Fretting Wear Damage Mechanism of Uranium under Various Atmosphere and Vacuum Conditions |
title_sort |
fretting wear damage mechanism of uranium under various atmosphere and vacuum conditions |
publisher |
MDPI AG |
series |
Materials |
issn |
1996-1944 |
publishDate |
2018-04-01 |
description |
A fretting wear experiment with uranium has been performed on a linear reciprocating tribometer with ball-on-disk contact. This study focused on the fretting behavior of the uranium under different atmospheres (Ar, Air (21% O2 + 78% N2), and O2) and vacuum conditions (1.05 and 1 × 10−4 Pa). Evolution of friction was assessed by coefficient of friction (COF) and friction-dissipated energy. The oxide of the wear surface was evaluated by Raman spectroscopy. The result shows that fretting wear behavior presents strong atmosphere and vacuum condition dependence. With increasing oxygen content, the COF decreases due to abrasive wear and formation of oxide film. The COF in the oxygen condition is at least 0.335, and it has a maximum wear volume of about 1.48 × 107 μm3. However, the COF in a high vacuum condition is maximum about 1.104, and the wear volume is 1.64 × 106 μm3. The COF in the low vacuum condition is very different: it firstly increased and then decreased rapidly to a steady value. It is caused by slight abrasive wear and the formation of tribofilm after thousands of cycles. |
topic |
fretting wear wear mechanism atmosphere uranium |
url |
http://www.mdpi.com/1996-1944/11/4/607 |
work_keys_str_mv |
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1716762265900810240 |