Adsorption of surrounding gas molecules on pure metal surfaces during wear processes

Sasada, Tadashi; Hiratsuka, K.; Saito, Hironori

doi:10.1016/0043-1648(90)90029-a

Cited by 32 publications

(10 citation statements)

References 4 publications

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“…The authors found that oxidized wear debris were produced by sliding of steels in a hydrogen environment with inevitably contained impurities [4]. It is widely recognized that oxygen [9,10] and water [11,12] are most influential gaseous members in a normal ambient atmosphere and the authors found that even small amounts ranged from 10 to 1,000 ppm of those gases in a hydrogen environment gave substantial influences on the tribological properties and even governed it sometimes.…”

Section: Introductionmentioning

confidence: 92%

Influences of Trace Water in a Hydrogen Environment on the Tribological Properties of Pure Iron

Fukuda

Sugimura

2013

Tribology Online

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The authors have clarified that trace impurities such as water and oxygen inevitably contained in a hydrogen environment influence friction and wear of metallic materials substantially and even often govern them. In this study, an experimental technique was devised to enable sliding tests in a hydrogen environment which contains controlled concentration of water and virtually no oxygen as impurities. By comparing data of Fe sliding tests between this study and our previous studies, the influences of water and oxygen were understood separately. Water without oxygen as impurity in a hydrogen environment decreased wear of pure Fe while oxygen in additional to water increased the wear. Sliding of pure Fe consumed water when a hydrogen environment contained only water while it produced water and consumed oxygen when the environment contained both water and oxygen. The number of water molecules consumed by sliding in a hydrogen environment with water more than 5,000 ppb and without oxygen was larger than the estimated number of nascent Fe atoms by sliding. This suggests that multi-layer adsorption of water molecules decreased the wear of pure Fe.

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Section: Introductionmentioning

confidence: 92%

Influences of Trace Water in a Hydrogen Environment on the Tribological Properties of Pure Iron

Fukuda

Sugimura

2013

Tribology Online

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“…The presence of a magnetic field around the ferromagnetic steel couple in sliding contact modifies considerably its tribological behaviour with an important decrease in the wear rate as it was shown by different experimental studies conducted by Muju and Ghosh [1,2], Hiratsuka et al [3][4][5], Kumagai et al [6], Bhushan and GE [7] and Zaidi et al [8][9][10][11][12][13][14][15][16]. However, the precise mechanism for the formation of the film was not determined and it is discussed by different authors with different discordances, particularly for ferromagnetic/paramagnetic couples of sliding materials.…”

Section: Introductionmentioning

confidence: 93%

Magnetotribology of ferromagnetic/ferromagnetic sliding couple

Zaïdi

Amirat

Frêne

et al. 2007

Wear

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“…The surrounding atmosphere is widely recognized as a key factor that influences friction and wear, especially when solids slide under dry conditions. Oxygen 1,2) and water 3,4) are known to be most influential in a normal ambient atmosphere. The substantial influence of oxygen is attributed to its chemisorption 2,5) onto many elements and its ability to oxidize a wide range of materials while water forms a thick adsorption layer because of the formation of strong hydrogen bonds.…”

Section: Introductionmentioning

confidence: 99%

“…Oxygen 1,2) and water 3,4) are known to be most influential in a normal ambient atmosphere. The substantial influence of oxygen is attributed to its chemisorption 2,5) onto many elements and its ability to oxidize a wide range of materials while water forms a thick adsorption layer because of the formation of strong hydrogen bonds. In general, oxygen and water are known to have a positive influence on tribological properties because the adsorbed or oxidized layers prevent severe adhesion between two solids during sliding while it is also recognized that excessive reaction leads to increase in corrosive wear.…”

Section: Introductionmentioning

confidence: 99%

Influence of Trace Water and Oxygen in a Hydrogen Environment on Pure Fe Friction and Wear

et al. 2010

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The influence of trace water and oxygen in a hydrogen environment on the sliding behavior of pure iron was studied using a newly developed pin-on-disk apparatus in a vacuum chamber equipped with an advanced gas replacement system. The hydrogen environment in the siding tests contained 0.5 to 95 ppm water and 0.07 to 2 ppm oxygen; a turbo-molecular pump was used for evacuation and a chemical filter for reducing water and oxygen in the hydrogen gas supplied to the chamber. The concentrations of water and oxygen in the hydrogen overflow from the chamber were determined using moisture and oxygen sensors, respectively. Other potential contaminant gases were analyzed using a quadrupole mass spectrometer during evacuation and were found to be insignificant. The amount of wear and the appearance of wear debris as well as the sliding surfaces were significantly different for the different concentrations of water and oxygen. The roles of these gasses are discussed.

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Adsorption of surrounding gas molecules on pure metal surfaces during wear processes

Cited by 32 publications

References 4 publications

Influences of Trace Water in a Hydrogen Environment on the Tribological Properties of Pure Iron

Influences of Trace Water in a Hydrogen Environment on the Tribological Properties of Pure Iron

Magnetotribology of ferromagnetic/ferromagnetic sliding couple

Influence of Trace Water and Oxygen in a Hydrogen Environment on Pure Fe Friction and Wear

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