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

Nevshupa, Roman; Conte, Marcello; Igartua, A.; Román, E.; Segovia, J.L. de

doi:10.1016/j.triboint.2015.01.020

Cited by 19 publications

(25 citation statements)

References 42 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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“…The vacuum system has been designed using a modular approach by dividing it into mechanical, vacuum, heating, and cooling sub-systems. 45 The efficiency of the various sub-systems was independently assessed, and any problems arising from their interactions were resolved.…”

Section: Review Of Scientific Instrumentsmentioning

confidence: 99%

Novel high temperature vacuum nanoindentation system with active surface referencing and non-contact heating for measurements up to 800 °C

Conte

Mohanty

Schwiedrzik

et al. 2019

Review of Scientific Instruments

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ARTICLE scitation.org/journal/rsiNovel high temperature vacuum nanoindentation system with active surface referencing and non-contact heating for measurements up to 800 ○ C Cite as: Rev. Sci. Instrum. 90, 045105 (2019); ABSTRACT High temperature nanoindentation is an emerging field with significant advances in instrumentation, calibration, and experimental protocols reported in the past couple of years. Performing stable and accurate measurements at elevated temperatures holds the key for small scale testing of materials at service temperatures. We report a novel high temperature vacuum nanoindentation system, High Temperature Ultra Nanoindentation Tester (UNHT 3 HTV), utilizing active surface referencing and non-contact heating capable of performing measurements up to 800 ○ C. This nanoindenter is based on the proven Ultra Nano-Hardness Tester (UNHT) design that uses two indentation axes: one for indentation and another for surface referencing. Differential displacement measurement between the two axes enables stable measurements to be performed over long durations. A vacuum level of 10 −7 mbar prevents sample surface oxidation at elevated temperatures. The indenter, reference, and sample are heated independently using integrated infrared heaters. The instrumental design details for developing a reliable and accurate high temperature nanoindenter are described. High temperature calibration procedures to minimize thermal drift at elevated temperatures are reported. Indentation data on copper, fused silica, and a hard coating show that this new generation of instrumented indenter can achieve unparalleled stability over the entire temperature range up to 800 ○ C with minimum thermal drift rates of <2 nm/min at elevated temperatures.

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“…It is also possible to measure the gas tribodesorption detected by mass spectra, during friction and wear tests. Both the force sensor and sample holder of the experimental system have been patented, PCT/ES2009/070635 and PCT/ES2010/07273, respectively [1][2][3][4]. In this machine, the patents from CSIC ES200700480 and ES2320513B1 have also been validated.…”

Section: Description Of the Main New Test Benches 41 Catri (Ca3uhv) mentioning

confidence: 99%

“…The reaction mechanism that explained the TiFx layer generation was elucidated (see Figure 13c) thanks to the fragments of the mass spectra (see Figure 13b) detected during the tribodesorption process. The machine and protocols have been used in the National Project CATRI [1], the EU Project MINILUBES [2], the Austrian X-Tribology COMET Initiative [3], the Eurostars Project VACUUM DLC [4], and industrial projects. The DEMETRA machine (see Figure 2) was built to measure the outgassing under vacuum to screen and select the materials and lubricants that can work under these conditions.…”

Section: Vacuum and Ultrahigh Vacuum Tribologymentioning

confidence: 99%

Tribology: The Tool to Design Materials for Energy-Efficient and Durable Products and Process

Igartua¹,

Bayón²,

Aranzabe³

et al. 2019

Friction, Lubrication and Wear

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This chapter describes a summary of the main tribological achievements carried out in TEKNIKER during the last 37 years. It covers the description of commercial and newly developed tribological test benches and case studies for a wide variety of applications. The examples refer to different tribological characterization tools for material selection (e.g., composition, surface treatments, lubricants). It makes emphasis in the failure mechanisms (pitting, scuffing, abrasion, adhesion, thermal fatigue, tribocorrosion, etc.) and friction simulation of a wide range of materials (seals, textiles, steels, cast iron, light alloys, ceramic, composites), tribological systems (mechanical components, biomaterials, tribolubrication), and environments (vacuum, ultrahigh vacuum, low or high temperature, and corrosive). A huge range of new testing equipment and protocols have been developed to simulate the mentioned failure mechanisms and working environments. This knowledge will make possible, in the future, to simulate at laboratory a still wider list of tribological systems and develop new standards. Tribology will help to implement materials solutions into energy and resource efficient products and process, to reduce carbon footprint.2 with more than 250 scientific contributions in congresses, journals, and books and 3 patents. It has been active in several international working groups and associations, in some of them, acting as Spanish representative:• The COST 516 about tribology (1995)(1996)(1997)(1998)(1999)(2000) • The COST 532 about tribotechnology of engines and transmissions

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

Cited by 19 publications

References 42 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

Novel high temperature vacuum nanoindentation system with active surface referencing and non-contact heating for measurements up to 800 °C

Tribology: The Tool to Design Materials for Energy-Efficient and Durable Products and Process

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