Search Results - "Carpick, R.W."

Si doping enhances the thermal stability of diamond-like carbon through reductions in carbon-carbon bond length disorder by Hilbert, J., Mangolini, F., McClimon, J.B., Lukes, J.R., Carpick, R.W.

“…Low thermal stability is a major limitation of diamond-like carbon (DLC) films, especially amorphous hydrogenated carbon (a-C:H) films, inhibiting their use in…”
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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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Understanding the hydrogen and oxygen gas pressure dependence of the tribological properties of silicon oxide–doped hydrogenated amorphous carbon coatings by Koshigan, K.D., Mangolini, F., McClimon, J.B., Vacher, B., Bec, S., Carpick, R.W., Fontaine, J.

“…Silicon oxide-doped hydrogenated amorphous carbons (a–C:H:Si:O) are amorphous thin films used as solid lubricants in a range of commercial applications, thanks…”
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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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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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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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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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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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Three-dimensional effects of twinning in magnesium alloys by Hazeli, K., Cuadra, J., Streller, F., Barr, C.M., Taheri, M.L., Carpick, R.W., Kontsos, A.

“…This article provides experimental evidence on the pronounced three-dimensional surface effects caused by tension twinning at early stages of plasticity of a…”
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Tribological Properties of Nanodiamond-Epoxy Composites by Neitzel, I., Mochalin, V., Bares, J.A., Carpick, R.W., Erdemir, A., Gogotsi, Y.

“…Owing to its superior mechanical properties, nanodiamond (ND) holds great potential to improve tribological characteristics of composites. In this study, we…”
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Scratching the Surface:  Fundamental Investigations of Tribology with Atomic Force Microscopy by Carpick, Robert W, Salmeron, Miquel

“…Carpick reviews progress and recent results obtained with atomic force microscopes and other closely related techniques in the field of nanotribology and…”
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A General Equation for Fitting Contact Area and Friction vs Load Measurements by Carpick, Robert W., Ogletree, D.Frank, Salmeron, Miquel

“…The variation of contact area with load between adhesive elastic spheres depends upon the effective range of attractive surface forces. Relatively simple forms…”
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Lateral stiffness: A new nanomechanical measurement for the determination of shear strengths with friction force microscopy by Carpick, R. W., Ogletree, D. F., Salmeron, M.

“…We present a technique to measure the lateral stiffness of the nanometer-sized contact formed between a friction force microscope tip and a sample surface…”
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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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Multiscale roughness and modeling of MEMS interfaces by Bora, C.K., Flater, E.E., Street, M.D., Redmond, J.M., Starr, M.J., Carpick, R.W., Plesha, M.E.

“…Investigation of contact and friction at multiple length scales is necessary for the design of surfaces in sliding microelectromechanical system (MEMS). A…”
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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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Understanding the hydrogen and oxygen gas pressure dependence of the tribological properties of silicon oxide–doped hydrogenated amorphous carbon coatings by Koshigan, K. D., Mangolini, F., McClimon, J. B., Vacher, B., Bec, S., Carpick, R. W., Fontaine, J.

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Spectroscopic Ellipsometry and Fluorescence Study of Thermochromism in an Ultrathin Poly(diacetylene) Film:  Reversibility and Transition Kinetics by Carpick, R. W., Mayer, T. M., Sasaki, D. Y., Burns, A. R.

“…We have investigated the thermochromic transition of an ultrathin poly(diacetylene) film. The Langmuir film is composed of three layers of polymerized…”
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Atomic Force Microscopy Study of an Ideally Hard Contact: The Diamond(111)/Tungsten Carbide Interface by Enachescu, M., van den Oetelaar, R. J. A., Carpick, R. W., Ogletree, D. F., Flipse, C. F. J., Salmeron, M.

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Growth of mechanically fixed and isolated vertically aligned carbon nanotubes and nanofibers by DC plasma-enhanced hot filament chemical vapor deposition by Yap, H.Y., Ramaker, B., Sumant, A.V., Carpick, R.W.

“…Vertically aligned, mechanically isolated, multiwalled carbon nanotubes (MWCNTs) and nanofibers (MWCNFs) were grown using an array of catalyst nickel nanowires…”
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