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atom probe tomography unveils formation mechanisms of wear

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atom probe tomography unveils formation mechanisms of wear

2016-1-15 · The correlative atom-probe tomographic and transmission electron microscopy characterization of the wear track of the friction tested steel surface revealing approximately 15 nm in thickness of the tribofilm. The major chemical components of this film are Ca, O, S, B, Cr and ∼40 at.% Fe, which reflects the fact that a tribochemical reaction occurred between the steel’s surface oxide …


The main focus of my research group is characterisation of catalyst materials, which uses atom probe tomography (APT) in conjunction with electron microscopy technique. The combined chemical and structural information can help to understand mechanisms of the catalyst materials, and guide the design to achieve optimal activity and stability.


2020-1-10 · For the homogenized HEAs, the magnetic state at room temperature transforms from paramagnetism to ferromagnetism after 20 at. % Cu addition. The increase of the saturation magnetization and Curie temperature cannot be adequately explained by the formation of Cu enriched zones according to atom probe tomography analysis.


2017-5-1 · Atom probe tomography and transmission electron microscopy are used to analyze magnetron-sputtered MoS 2 films containing Ti and Au/Sb 2 O 3 as a model system for tribological coatings. Transmission electron microscopy characterization showed that the Ti–MoS 2 film is dense and featureless whereas Sb 2 O 3 /Au–MoS 2 film is less dense and have columnar morphology.


2015-2-13 · Atom probe tomography (APT) is a technique suited to compositional mapping at such length scales (16, 17). The recent introduction of ultraviolet laser-pulsed APT has enabled the investigation of the chemical nanostructure of mineralized …


AN ATOM-PROBE TOMOGRAPHY STUDY BY BRAD D. STUMPHY DISSERTATION Submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Materials Science and Engineering in the Graduate College of the University of Illinois at Urbana-Champaign, 2013 Urbana, Illinois Doctoral Committee: Professor Robert S. Averback, Chair


2017-6-20 · Guo, Wei, Zhou, Yan, Sang, Xiahan, Leonard, Donovan N., Qu, Jun, and Poplawsky, Jonathan D. Atom Probe Tomography Unveils Formation Mechanisms of Wear-Protective Tribofilms by ZDDP, Ionic Liquid, and Their Combination. United States: N. p., 2017. Web. doi:10.1021/acsami.7b04719.


2017-4-10 · Formation Mechanisms of Alloying Element Nitrides in Recrystallized and Deformed Ferritic Fe-Cr-Al ... atom probe tomography (APT), and electron probe microanalysis (EPMA). In recrystallized Fe-Cr-Al specimens, one type of nitride develops: ternary, cubic, NaCl-type ... (wear and fatigue) and chemical (corro-sion) properties of ferritic steel ...


Correlative Energy-Dispersive X-Ray Spectroscopic Tomography and Atom Probe Tomography of the Phase Separation in an Alnico 8 Alloy† - Volume 22 Issue 6 ... Atom Probe Tomography Unveils Formation Mechanisms of Wear-Protective Tribofilms by ZDDP, Ionic Liquid, and Their Combination. ACS Applied Materials & Interfaces, Vol. 9, Issue. 27, p. 23152.


2019-7-6 · Atom Probe Tomography Unveils Formation Mechanisms of Wear-Protective Tribofilms by ZDDP, Ionic Liquid, and Their Combination Journal Article Guo, Wei ; Zhou, Yan ; Sang, Xiahan ; ... - ACS Applied Materials and Interfaces


2018-1-30 · Atom probe tomography (APT) is gaining grounds in many fields of materials research. The combination of 3D analysis, sub-nanometer resolution, and elemental identification makes it a powerful complement to crystal structure sensitive techniques, such as X-ray diffraction (XRD) and transmission electron microscopy (TEM).


2020-1-14 · Atom Probe Tomography Unveils Formation Mechanisms of Wear-Protective Tribofilms by ZDDP, Ionic Liquid, and Their Combination. Guo W, Zhou Y, Sang X, Leonard DN, Qu J, Poplawsky JD. ACS Appl Mater Interfaces, 9(27):23152-23163, 29 Jun 2017 Cited by: 0 articles | PMID: 28632986


2019-5-22 · The local chemistry will be explored at high resolution using atom probe tomography via collaboration with Dr. Baptiste Gault, Max-Planck-Institut fur Eisenforschung, Germany. To extend the strain range and, hence, defect densities studied we will also explore using severe plastic deformation through a collaboration with Prof. Gheoghe Gurau ...


2017-1-10 · bonding and formation mechanisms, striking similarities were found that could inspire future ... Together, this work examined the relationships between wear, corrosion, and tribology to connect nanoscale structure and composition to applied performance. 4 ... APT atom probe tomography BCS bovine calf serum BF bright field


2016-7-8 · The effect of the initial microstructure (recrystallized or cold-rolled) on the nitride precipitation process upon gaseous nitriding of ternary Fe-4.3 at. pct Cr-8.1 at. pct Al alloy was investigated at 723 K (450 °C) employing X-ray diffraction (XRD) analyses, transmission electron microscopy (TEM), atom probe tomography (APT), and electron probe microanalysis (EPMA).


2021-6-18 · The longevity of a lithium-ion battery is limited by cathode degradation. Combining atom probe tomography and scanning transmission electron …


Dedicated experiments are conducted to investigate the mechanisms of precipitate decomposition by deformation, heat and electricity. A further project aims at the direct observation of solute hydrogen by atom probe tomography (APT) in deformed pearlite to shed light on the role of hydrogen in the process of cementite decomposition.


2021-5-6 · Combining atom probe tomography, reciprocal space mapping, cross-sectional transmission electron microscopy, and atomic force microscopy analyses, we demonstrate that for a layer thickness of , a high DSR (~70%) can be achieved, while maintaining compositional uniformity at the atomic scale.


Atom probe tomography unveils formation mechanisms of wear-protective tribofilms by ZDDP, ionic liquid, and their combination W Guo, Y Zhou, X Sang, DN Leonard, J Qu, JD Poplawsky ACS applied...


State-of the art techniques such as scanning and transmission electron microscopy, atom probe tomography and X-ray dispersive spectroscopy are applied to investigate the fundamental mechanisms of tribo-oxidation. Eventually, this knowledge will allow for a …


Atom probe tomography observation of hydrogen in high-Mn steel and silver charged via an electrolytic route We investigate an electrolytic route for hydrogen charging of metals and its detection in Atom Probe Tomography (APT) experiments. We charge an austenitic Fe-30Mn-8Al-1.2C (wt.%) weight reduced high-Mn steel and subsequently demonstrate the detectability of deuterium in an APT experiment.


2013-11-6 · Atomic force microscopy and molecular dynamics simulation are used to study the nanoscale wear of a silicon dioxide tip sliding on a copper substrate. Wear is characterized in terms of structural and chemical evolution of the system where the latter is possible experimentally using atom probe tomography of the slid tips. Comparison of the experimentally observed and simulation-predicted wear ...


Guo, W., Zhou, Y., Sang, X., Leonard, D.N., Qu, J. and Poplawsky, J.D. (2017), “ Atom probe tomography unveils formation mechanisms of wear-protective tribofilms by ZDDP, ionic liquid, and their combination ”, ACS Applied Materials & Interfaces, Vol. 9 No. 27, pp. 23152-23163.


2017-6-29 · Atom Probe Tomography Unveils Formation Mechanisms of Wear-Protective Tribofilms by ZDDP, Ionic Liquid, and Their ACS Applied Materials & Interfaces ( IF 9.229) Pub Date : 2017-06-29 00 Wei Guo,Yan Zhou,Xiahan Sang,Donovan N. Leonard,Jun Qu,Jonathan D. Poplawsky


We investigated wear prevention mechanism of tribofilms generated from zinc dialkyldithiophosphate (ZDDP) and zinc dialkylphosphate (ZP) anti-wear additive using molecular dynamics simulations. The friction behavior of two model materials, zinc metathiophosphate and zinc metaphosphate, was studied. The results indicated that zinc metathiophosphate prevents the abrasive wear due to the ...


In this study, the mechanism behind the formation of the WIL by sliding wear under high stress for pure Cu is investigated. The microstructure around the worn surface changes discontinuously between the WIL and the plastically deformed region (PDR). ... Formation mechanisms of such WILs have been reported ... by atom probe tomography and TEM ...


2019-2-21 · wear resistance. Mahesh Somani 2 • In ... • Kinetics and morphology of martensite and bainite formation especially from thermomechanically conditioned austenite; • Fracture mechanisms in high-strength steels • Multilevel structural research of nanoparticles and their surface ... • Atom Probe Tomography


2021-5-6 · The below graphics illustrates the growth of Atom Probe Tomography in the word Adoption by the scientific community and publication rate have grown exponentially over the past 10 years, witnessing the coming of age of Atom Probe Tomography, the …


2019-10-24 · lying mechanisms leading to metal ion release from such taper junctions. Correlative transmission electron microscopy and atom probe tomography reveals microstructural and compositional alterations in the subsurface of the titanium alloy subjected …


2020-4-17 · Formation of nanosized grain structure in martensitic 100Cr6 bearing steels upon rolling contact loading studied by atom probe tomography Y. J. Li∗, M. Herbig, S. Goto and D. Raabe To understand the origin of white etching cracks (WECs), a systematic microstructural


2007-2-20 · To overcome these obstacles, local-electrode atom-probe (LEAP) tomography was used to investigate the composition and structure of the carburized surface at the atomistic scale. To ensure that the analyzed regions were actually from the case, microtips for the LEAP tomographic analysis were prepared using a focused ion beam (FIB) [4].


2018-1-30 · Mass spectral overlaps in atom probe tomography (APT) analyses of complex compounds typically limit the identification of elements and microstructural analysis of a material. This study concerns the TiSiN system, chosen because of severe mass-to-charge-state ratio overlaps of the


2011-1-12 · Here we show that pulsed-laser atom-probe tomography reveals three-dimensional chemical maps of organic fibres with a diameter of 5–10 nm in the surrounding nano-crystalline magnetite (Fe 3 …


2010-6-1 · Atom probe tomography analysis of the white etching layer in a rail track surface. ... which cause structural defects and modulation of the rail surfaces resulting from serious wear and rail corrugation. ... The origin and mechanisms of formation of not only the surface layer but also the whole area of the WEL need to be discussed.


2017-6-29 · Atom Probe Tomography Unveils Formation Mechanisms of Wear-Protective Tribofilms by ZDDP, Ionic Liquid, and Their Combination. Wei Guo Center for Nanophase Materials Sciences and ‡Materials Science and Technology Division, Oak Ridge National Laboratory , Oak Ridge, Tennessee 37831, United States.


Atom Probe Tomography Unveils Formation Mechanisms of Wear-Protective Tribofilms by ZDDP, Ionic Liquid, and Their Combination Guo, Wei ; Zhou, Yan ; Sang, Xiahan ; Leonard, Donovan N. ; Qu, Jun ; Poplawsky, Jonathan D.


2019-11-5 · In addition, atom probe tomography (APT) analyses were performed to characterize the nano-scale chemical distribution. F. Li, T. Liu and T. Wang et al. / Journal of the Mechanics and Physics of Solids 132 (2019) 103681 3


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