Ion-beam deposited Cu-Mo coatings as high temperature solid lubricants

Wahl, Kathryn J.; Seitzman, L. E.; Bolster, R.N.; Singer, I. L.; Peterson, M. B.

doi:10.1016/s0257-8972(96)02900-3

Cited by 67 publications

(20 citation statements)

References 18 publications

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“…From work on powder-based and other types of composites, it is known that silver is an effective lubricant up to moderately high temperatures [11][12][13][14][15][16]. YSZ-Mo composites showed moderately low friction above 500°C [9] due to the formation of lubricious molybdenum-based compounds at high-temperature in air, similar to that shown by other researchers [17][18][19][20][21]. Examination of YSZ-AgMo nanocomposites tested from 25 to 700°C revealed both the noble metal and the soft oxide lubrication *To whom correspondence should be addressed.…”

Section: Introductionsupporting

confidence: 81%

“…The lifetime of the lubricating silver layer was short due to excessive softening of the surface at a high fraction of its melting point [11,23], and the lack of lubricant supply to the worn area. Additionally, lubrication by MoO 3 formation was likely to be limited, since 500°C is the lower limit at which Mo oxidation reactions occur in air [20,24]. Also, the residual YSZ-Mo coating became porous with the silver removed (figure 5) after one thermal cycle, resulting in an irreversible change in morphology and degradation of the mechanical properties after of the coating after heating.…”

Section: Monolithic Nanocomposite Coatingmentioning

confidence: 99%

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Multilayered YSZ–Ag–Mo/TiN adaptive tribological nanocomposite coatings

Muratore

Voevodin

et al. 2006

Tribol Lett

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Adaptive nanocomposite coatings provide low friction in broad ranges of environmental conditions through the formation of lubricious surfaces resulting from interactions with the ambient atmosphere. Designing adaptive coatings to withstand wear through repeated thermal cycles is particularly difficult since most demonstrate irreversible changes in surface composition and morphology. This permanent change in the condition of the surface limits the utility of adaptive coatings in applications where thermal cycling is expected. Moreover, some lubrication mechanisms occur over the entire coating surface in addition to the area experiencing wear, which results in a significant waste of lubricant. In an effort to increase the wear lifetime and move toward thermal cycling capabilities of solid adaptive lubricants, a multilayer coating architecture incorporating two layers of adaptive YSZ-Ag-Mo nanocomposite lubricant separated by a TiN diffusion barrier was produced. The multilayer coating lasted over five times longer than a monolithic adaptive coating of identical composition and total thickness for dry sliding tests at 500°C in air. Analysis of the structure and composition of the films after heating suggests directed, lateral diffusion of lubricant beneath the diffusion barrier toward the wear scar as a mechanism for the increased wear life of the multilayer coating.

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Section: Introductionsupporting

confidence: 81%

Section: Monolithic Nanocomposite Coatingmentioning

confidence: 99%

Multilayered YSZ–Ag–Mo/TiN adaptive tribological nanocomposite coatings

Muratore

Voevodin

et al. 2006

Tribol Lett

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“…In the case of friction between aluminum bronze and stainless steel, it can be considered that MoO 3 didn't 4) . They suggested that the amorphous Cu-Mo coating changed to crystalline oxide CuMoO 4 and that the softened oxides worked as high temperature lubricant.…”

Section: Lubricity Of Copper -Molybdenum Oxides Under High Temperaturmentioning

confidence: 99%

“…They suggested that the amorphous Cu-Mo coating changed to crystalline oxide CuMoO 4 and that the softened oxides worked as high temperature lubricant.…”

Section: Lubricity Of Copper -Molybdenum Oxides Under High Temperaturmentioning

confidence: 99%

Effects of Molybdenum Trioxide on the Tribological Properties of Aluminum Bronze under High Temperature Conditions

et al. 2009

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The effect of molybdenum trioxide (MoO 3 ) on the friction and wear of aluminum bronze was studied at the temperature up to 973 K. MoO 3 powder supplied to the sliding interface between aluminum bronze and stainless steel reduced friction coefficient and wear of materials at the temperature from 773 to 973 K. Copper-molybdenum oxide was generated by sliding aluminum bronze and stainless steel in presence of MoO 3 powder at high temperature. This oxide is supposed to be Cu 3 Mo 2 O 9 from the results of XRD analysis of the friction track. The authors obtained Cu 3 Mo 2 O 9 powder by heating the mixture of MoO 3 powder and CuO powder in air. The lubricity of Cu 3 Mo 2 O 9 powder was compared with that of MoO 3 powder at the temperature up to 973 K. Cu 3 Mo 2 O 9 powder reduced wear and friction at the temperature from 773 to 973 K while MoO 3 powder could not work as lubricant at the temperature over 873 K.

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“…Erdemir's approach was, however, not suitable to explain the friction of few oxides. In addition to his own work, Erdemir screened and collected values from so many authors, mainly from the work of Peterson et al [2][3][4][5][6][7][8][9][10]. These authors carried out most of their experiments with Ni and Ni based alloys as counterbody.…”

Section: Introduction To Chemical Approach and Polarisabilitymentioning

confidence: 99%

The Lubricity of Oxides Revised Based on a Polarisability Approach

Prakash

Célis

2007

Tribol Lett

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The lubricity of a wide variety of solid oxides at high temperature is analysed mainly based on the existing polarisability approach. The starting point is that the interaction between ions in an oxide depends on how strongly electrons are interacting in overlapping orbitals. This is related to the polarisability of ions. From this polarisability, the interaction between cation and anion present in an oxide was calculated for binary/mixed oxides and for six new simple oxides (values for 17 oxides collected from literature) and correlated to the coefficient of friction of these oxides below their melting temperature. Based on that correlation, the mechanism of friction of these oxides is proposed.

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Ion-beam deposited Cu-Mo coatings as high temperature solid lubricants

Cited by 67 publications

References 18 publications

Multilayered YSZ–Ag–Mo/TiN adaptive tribological nanocomposite coatings

Multilayered YSZ–Ag–Mo/TiN adaptive tribological nanocomposite coatings

Effects of Molybdenum Trioxide on the Tribological Properties of Aluminum Bronze under High Temperature Conditions

The Lubricity of Oxides Revised Based on a Polarisability Approach

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