Search Results - "Carpick, R. W."

Mechanisms of antiwear tribofilm growth revealed in situ by single-asperity sliding contacts by Gosvami, N. N., Bares, J. A., Mangolini, F., Konicek, A. R., Yablon, D. G., Carpick, R. W.

“…Zinc dialkyldithiophosphates (ZDDPs) form antiwear tribofilms at sliding interfaces and are widely used as additives in automotive lubricants. The mechanisms…”
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Constraints on the Physical Mechanism of Frictional Aging From Nanoindentation by Thom, C. A., Carpick, R. W., Goldsby, D. L.

“…The increase in the frictional strength of rocks with the time of quasi‐stationary contact, known as frictional aging, may ultimately determine whether…”
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Origin of ultralow friction and wear in ultrananocrystalline diamond by Konicek, A R, Grierson, D S, Gilbert, P U P A, Sawyer, W G, Sumant, A V, Carpick, R W

“…The impressively low friction and wear of diamond in humid environments is debated to originate from either the stability of the passivated diamond surface or…”
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AFM at the Macroscale: Methods to Fabricate and Calibrate Probes for Millinewton Force Measurements by Garabedian, N. T., Khare, H. S., Carpick, R. W., Burris, D. L.

“…The difficulty in detecting and controlling forces in the gap between the nanoscale and macroscale tribometry regimes has so far limited the application of…”
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Nanotribological Printing: A Nanoscale Additive Manufacturing Method by Khare, H. S, Gosvami, N. N, Lahouij, I, Milne, Z. B, McClimon, J. B, Carpick, R. W

“…Additive manufacturing methods are transforming the way components and devices are fabricated, which in turn is opening up completely new vistas for conceiving…”
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Preventing Nanoscale Wear of Atomic Force Microscopy Tips Through the Use of Monolithic Ultrananocrystalline Diamond Probes by Liu, J., Grierson, D. S., Moldovan, N., Notbohm, J., Li, S., Jaroenapibal, P., O'Connor, S. D., Sumant, A. V., Neelakantan, N., Carlisle, J. A., Turner, K. T., Carpick, R. W.

“…Nanoscale wear is a key limitation of conventional atomic force microscopy (AFM) probes that results in decreased resolution, accuracy, and reproducibility in…”
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Accounting for the JKR-DMT transition in adhesion and friction measurements with atomic force microscopy by Grierson, D. S., Flater, E. E., Carpick, R. W.

“…Over the last 15 years, researchers have applied theories of continuum contact mechanics to nanotribology measurements to determine fundamental parameters and…”
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Investigation of the Mechanics, Composition, and Functional Behavior of Thick Tribofilms Formed from Silicon- and Oxygen-Containing Hydrogenated Amorphous Carbon by McClimon, J. B., Lang, A. C., Milne, Z., Garabedian, N., Moore, A. C., Hilbert, J., Mangolini, F., Lukes, J. R., Burris, D. L., Taheri, M. L., Fontaine, J., Carpick, R. W.

“…A custom-grown silicon and oxygen-containing hydrogenated amorphous carbon (a-C:H:Si:O) film is subjected to ball-on-flat tribometry under controlled sliding…”
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Analyzing the performance of diamond-coated micro end mills by Torres, C.D., Heaney, P.J., Sumant, A.V., Hamilton, M.A., Carpick, R.W., Pfefferkorn, F.E.

“…A method is presented to improve the tool life and cutting performance of 300 μm diameter tungsten carbide (WC) micro end mills by applying thin (<300 nm)…”
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Transformations in Wrinkle Patterns: Cooperation between Nanoscale Cross-Linked Surface Layers and the Submicrometer Bulk in Wafer-Spun, Plasma-Treated Polydimethylsiloxane by Evensen, H. T, Jiang, H, Gotrik, K. W, Denes, F, Carpick, R. W

“…We demonstrate control of the topography of strain-induced wrinkle patterns through the interplay between the bulk and the nanoscale cross-linked top layer of…”
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First Observation of Mechanochromism at the Nanometer Scale by Carpick, R. W, Sasaki, D. Y, Burns, A. R

“…A mechanically induced color transition (“mechanochromism”) in poly(diacetylene) thin films has been generated at the nanometer scale using the tips of two…”
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Influence of surface passivation on the friction and wear behavior of ultrananocrystalline diamond and tetrahedral amorphous carbon thin films by Konicek, A. R., Grierson, D. S., Sumant, A. V., Friedmann, T. A., Sullivan, J. P., Gilbert, P. U. P. A., Sawyer, W. G., Carpick, R. W.

“…Highly sp super(3)-bonded, nearly hydrogen-free carbon-based materials can exhibit extremely low friction and wear in the absence of any liquid lubricant, but…”
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An In Situ Method for Simultaneous Friction Measurements and Imaging of Interfacial Tribochemical Film Growth in Lubricated Contacts by Gosvami, N. N., Ma, J., Carpick, R. W.

“…Tribological investigations of macroscopic lubricated sliding contacts are critical for a wide range of industrial applications including automotive engines,…”
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Near-Edge X-ray Absorption Fine Structure Imaging of Spherical and Flat Counterfaces of Ultrananocrystalline Diamond Tribological Contacts: A Correlation of Surface Chemistry and Friction by Konicek, A. R., Jaye, C., Hamilton, M. A., Sawyer, W. G., Fischer, D. A., Carpick, R. W.

“…A recently installed synchrotron radiation near-edge X-ray absorption fine structure (NEXAFS) full field imaging electron spectrometer was used to spatially…”
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Toward the Ultimate Tribological Interface: Surface Chemistry and Nanotribology of Ultrananocrystalline Diamond by Sumant, A. V., Grierson, D. S., Gerbi, J. E., Birrell, J., Lanke, U. D., Auciello, O., Carlisle, J. A., Carpick, R. W.

“…Ultrananocrystalline diamond (UNCD) may offer a solution to tribological failure of silicon‐based micromachines because of its outstanding mechanical…”
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The Impact of Solution Agglomeration on the Deposition of Self-Assembled Monolayers by Bunker, B. C, Carpick, R. W, Assink, R. A, Thomas, M. L, Hankins, M. G, Voigt, J. A, Sipola, D, de Boer, M. P, Gulley, G. L

“…Self-assembled monolayers (SAMs) are commonly produced by immersing substrates in organic solutions containing trichlorosilane coupling agents. Unfortunately,…”
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Structure-property relationships from universal signatures of plasticity in disordered solids by Cubuk, E. D., Ivancic, R. J. S., Schoenholz, S. S., Strickland, D. J., Basu, A., Davidson, Z. S., Fontaine, J., Hor, J. L., Huang, Y.-R., Jiang, Y., Keim, N. C., Koshigan, K. D., Lefever, J. A., Liu, T., Ma, X.-G., Magagnosc, D. J., Morrow, E., Ortiz, C. P., Rieser, J. M., Shavit, A., Still, T., Xu, Y., Zhang, Y., Nordstrom, K. N., Arratia, P. E., Carpick, R. W., Durian, D. J., Fakhraai, Z., Jerolmack, D. J., Lee, Daeyeon, Li, Ju, Riggleman, R., Turner, K. T., Yodh, A. G., Gianola, D. S., Liu, Andrea J.

“…When deformed beyond their elastic limits, crystalline solids flow plastically via particle rearrangements localized around structural defects. Disordered…”
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Variation of the Interfacial Shear Strength and Adhesion of a Nanometer-Sized Contact by Carpick, R. W, Agraït, N, Ogletree, D. F, Salmeron, M

“…We observe that the frictional force between a platinum-coated atomic force microscope (AFM) tip and the surface of mica in ultrahigh vacuum (UHV) varies with…”
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Microstructure-sensitive investigation of magnesium alloy fatigue by Hazeli, K., Askari, H., Cuadra, J., Streller, F., Carpick, R.W., Zbib, H.M., Kontsos, A.

“…•Twinning activity was observed during the first cycle as well as subsequent fatigue life stages.•Mechanical testing information was supported by…”
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Nanoscale in situ study of ZDDP tribofilm growth at aluminum-based interfaces using atomic force microscopy by Gosvami, N.N., Lahouij, I., Ma, J., Carpick, R.W.

“…Zinc dialkyldithiophosphate (ZDDP)-based antiwear additives are crucial in automotive lubricants, where its effectiveness in reducing wear of ferrous alloys is…”
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