An UHV system to study gassing and outgassing of metals under friction

Nevchoupa, R.A.; Segovia, J.L. de; Deulin, E. A.

doi:10.1016/s0042-207x(98)00209-7

Cited by 18 publications

(20 citation statements)

References 11 publications

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“…A new family of experimental techniques that combine tribometry with mass spectrometry or surface sensitive techniques has recently emerged [48][49][50][51][52][53][54]. These new techniques can provide important information on the development of tribochemical processes in the course of a tribological test.…”

Section: Methodsmentioning

confidence: 99%

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Time-Resolved Characterization of Dynamic Tribochemical Processes for Dicationic Imidazolium Ionic Liquid

et al. 2017

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Dynamic tribochemical processes for dicationic ionic liquid containing a geminal imidazolium cation head group bridged by a poly(ethylene glycol) and a bis(trifluoromethylsulfonyl)imide anion were studied using time-resolved mechanically stimulated gas emission mass-spectrometry (MSGE-MS). In comparison with similar monocationic imidazolium ionic liquids with short alkyl or long polyether side chains, the dicationic ionic liquid had a lower coefficient of friction on Ti6Al4V alloy and smoother behavior. The analysis of volatile decomposition products suggested multiple tribochemical reactions in which both anionic and cationic moieties are involved. The tribochemical degradation of cations was mainly through the detachment of the side and bridging chains from the imidazolium head groups. The absence of volatile products containing nitrogen implies that the imidazole group remained unchanged. Hydrogen and water desorption were attributed to the reactions of hydrogen fluoride being a product of anion degradation with titanium and titanium oxide, respectively.

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Section: Methodsmentioning

confidence: 99%

“…Tribological characterization and analysis of mechanically stimulated gas emission were carried out using an original ultrahigh vacuum system [49,50]. A friction cell with a reciprocating pin-on-flat configuration was specially designed to obtain almost zero intrinsic gas emission.…”

Section: Experimental Techniques and Proceduresmentioning

confidence: 99%

Time-Resolved Characterization of Dynamic Tribochemical Processes for Dicationic Imidazolium Ionic Liquid

et al. 2017

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“…An alumina ball, 3 mm in diameter, was used as indenter for the softer B500SD, whereas a tungsten carbide cone tip was used for the harder R4. Alumina has been shown to yield insignificant gas emission (37,48). In addition to high wear resistance and high hardness, it has high thermal conductivity, thus reducing frictional heating.…”

Section: Comparative Study Of Hydrogen Absorption In Ferrite-perlite mentioning

confidence: 99%

TriDes – a new tool for the design, development and non-destructive evaluation of advanced construction steels

et al. 2016

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Design and development of advanced steel types require establishing an optimal combination of mechanical strength, resistance to hydrogen degradation and durability, among others; however, the available tools for assessing some of these properties are limited. A novel tool for supporting the design and development of steel types was therefore created. This tool, called TriDes, is based on the phenomenon of mechanically stimulated gas emission and allows for determining mechanical properties and hydrogen concentration locally, with high spatial resolution and during different phases of the service life of construction steel elements. Its applicability to the development of pipe steel with improved durability, as well as to steel types used in marine environments, has been investigated. RESUMEN: TriDes -una nueva herramienta para el diseño, desarrollo y evaluación no destructiva de aceros avanzados de construcción.El diseño y desarrollo de acero avanzado requiere establecer una combinación óptima de resistencia mecánica, resistencia a la degradación por hidrógeno y la durabilidad, entre otras. Sin embargo, las herramientas disponibles para evaluar experimentalmente algunas de estas propiedades son limitadas. Por lo tanto se creó una nueva herramienta, llamada TriDes. Esta técnica está basada en un principio físico distinto de los que se usan en las técnicas establecidas y combina la caracterización de hidrógeno en el acero en y la caracterización mecánica y/o tribológica. La técnica es portatil lo que permite determinar concentración local de hidrógeno con alta resolución espacial durante todo el ciclo de vida de elementos fabricados en acero y además evaluar la dureza y resistencia al desgaste del acero. Se ha investigado la capacidad de la técnica para el desarrollo de aceros para aplicaciones en gasoductos y construcciones marinas.

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“…The pin is connected to a sealed shaft and can perform reciprocating linear motion. This scheme was realized in an UHV experimental system TriDes [49]. In this configuration, when the lever and the shaft axes are parallel, normal load can slightly vary (various percent) during a friction cycle because of the variation in the effective arm length.…”

Section: Tribometer Configurationsmentioning

confidence: 99%

“…Ultrahigh vacuum and/or controlled ambient atmosphere are the necessary conditions when studying gas-phase lubrication [9], mechanically stimulated gas emission (MSGE) [10][11][12][13][14][15][16][17][18][19][20], triboplasma [21][22][23], triboelectrification [24][25][26], triboluminescence [24,27,28], emission of charged particles [29][30][31], tribochemical reactions [23,[32][33][34], etc. For these studies, conventional tribological test rigs should be combined with various physical, chemical and surface characterization techniques.…”

Section: Introductionmentioning

confidence: 99%

Ultrahigh vacuum system for advanced tribology studies: Design principles and applications

Nevshupa

Conte

Igartua

et al. 2015

Tribology International

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a b s t r a c tThe main difficulty in designing of an ultrahigh vacuum (UHV) tribometer combined with tribophysical and tribochemical characterization techniques is to find the critical compromise between the scientific requirements and technical or technological limitations from different subsystems and components. The principal conflicts, their possible solutions and the recommended tribometer configurations are analyzed. The developed methodological principles were applied for designing and construction of two UHV experimental tribological systems: TriDes-2 and Ca 3 UHV. The advances in the design and development of the vacuum system as well as the UHV force sensor and sample holder are presented and discussed.

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An UHV system to study gassing and outgassing of metals under friction

Cited by 18 publications

References 11 publications

Time-Resolved Characterization of Dynamic Tribochemical Processes for Dicationic Imidazolium Ionic Liquid

Time-Resolved Characterization of Dynamic Tribochemical Processes for Dicationic Imidazolium Ionic Liquid

TriDes – a new tool for the design, development and non-destructive evaluation of advanced construction steels

Ultrahigh vacuum system for advanced tribology studies: Design principles and applications

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