scholarly journals Discussion: “In-Situ Nanoindentation Hardness Apparatus for Mechanical Characterization of Extremely Thin Films” (Bhushan, B., Williams, V. S., and Shack, R. V., 1988, ASME J. Tribol., 110, pp. 563–571)

1988 ◽  
Vol 110 (3) ◽  
pp. 571-571
Author(s):  
P. K. Mehrotra
Keyword(s):  
Thin Films ◽  
Mechanical Characterization ◽  
Nanoindentation Hardness

In-Situ Nanoindentation Hardness Apparatus for Mechanical Characterization of Extremely Thin Films

1988 ◽  
Vol 110 (3) ◽  
pp. 563-571 ◽  
Author(s):  
B. Bhushan ◽  
V. S. Williams ◽  
R. V. Shack
Keyword(s):  
Thin Films ◽  
Personal Computer ◽  
Mechanical Characterization ◽  
Linear Actuator ◽  
Air Bearing ◽  
Polarization Interferometer ◽  
Nanoindentation Hardness ◽  
Scratch Tests

A nanoindenter apparatus is developed to measure the microhardness and microviscoelastic properties (in compression) of extremely thin films. In-situ indentation measurements are made by polarization interferometer by monitoring the absolute motions of the sample and indenter. A linear actuator provides the load, and the indenter load is inferred from the position of the indenter measured by the interferometer and the stiffness of the indenter parallel spring guide. A personal computer and associated electronics provide the control for load and penetration. These allow the instrument to determine microhardness and characterize microviscoelastic creep and relaxation properties. The linear actuator and the sample parallel spring guide are supported by an air bearing stage which is translated at a constant speed to conduct scratch tests for adhesion measurements. Based on the data reported in the paper, we find that microhardness and microviscoelastic properties at extremely low loads (or penetrations) are load (or penetration) dependent.

Spectro-mechanical Characterization of Aromaticity and Maturity of Kerogens in Oil Shale at 6 nm Spatial Resolution

2018 ◽  
Author(s):  
Devon Jakob ◽  
Le Wang ◽  
Haomin Wang ◽  
Xiaoji Xu
Keyword(s):  
Spatial Resolution ◽  
Oil Shale ◽  
Infrared Imaging ◽  
Mechanical Characterization ◽  
Optical Diffraction ◽  
Chemical Compositions ◽  
Valuable Insight ◽  
Eagle Ford Shale

<p>In situ measurements of the chemical compositions and mechanical properties of kerogen help understand the formation, transformation, and utilization of organic matter in the oil shale at the nanoscale. However, the optical diffraction limit prevents attainment of nanoscale resolution using conventional spectroscopy and microscopy. Here, we utilize peak force infrared (PFIR) microscopy for multimodal characterization of kerogen in oil shale. The PFIR provides correlative infrared imaging, mechanical mapping, and broadband infrared spectroscopy capability with 6 nm spatial resolution. We observed nanoscale heterogeneity in the chemical composition, aromaticity, and maturity of the kerogens from oil shales from Eagle Ford shale play in Texas. The kerogen aromaticity positively correlates with the local mechanical moduli of the surrounding inorganic matrix, manifesting the Le Chatelier’s principle. In situ spectro-mechanical characterization of oil shale will yield valuable insight for geochemical and geomechanical modeling on the origin and transformation of kerogen in the oil shale.</p>

Nanoclay-reinforced Polyacrylamide Composite: Synthesis, Structural and Mechanical Characterization

2009 ◽  
Vol 1239 ◽  
Author(s):  
Yong Sun ◽  
Zaiwang Huang ◽  
Xiaodong Li
Keyword(s):  
Thin Films ◽  
Deformation Behavior ◽  
Mechanical Characterization ◽  
Interfacial Strength ◽  
Localized Deformation ◽  
Nano Indentation ◽  
Atomic Force ◽  
Nanocomposite Thin Films ◽  
Synthesized Materials

AbstractA facile electrophoretic deposition method was successfully applied to achieve novel nanoclay-reinforced polyacrylamide nanocomposite thin films. A special curled architecture of the re-aggregated nanoclay-platelets was identified, providing a possible source for realizing the interlocking mechanism in the nanocomposites. The curled architecture could be the result from strain releasing when the thin films were peeled off from the substrates. Through micro-/nano-indentation and in situ observation of the deformation during tensile test with an atomic force microscope (AFM), the localized deformation mechanism of the synthesized materials was investigated in further details. The results implied that a localized crack diversion mechanism worked in the synthesized nanocomposite thin films, which resembled its nature counterpart-nacre. The deformation behavior and fracture mechanism were discussed with reference to lamellar structure, interfacial strength between the nanoclays and the polyacrylamide matrix, and nanoclay agglomeration.

scholarly journals In Situ Lorentz Differential Phase Contrast STEM Characterization of Rashba Interaction on Skyrmion Thin Films

2018 ◽  
Vol 24 (S1) ◽  
pp. 1900-1901
Author(s):  
B. D. Esser ◽  
A. S. Ahmed ◽  
K. Meng ◽  
J. Rowland ◽  
M. Randeria ◽  
...  
Keyword(s):  
Thin Films ◽  
Phase Contrast ◽  
Differential Phase ◽  
Rashba Interaction ◽  
Differential Phase Contrast

scholarly journals Open-source micro-tensile testers via additive manufacturing for the mechanical characterization of thin films and papers

PLoS ONE ◽  
2018 ◽  
Vol 13 (5) ◽  
pp. e0197999 ◽  
Author(s):  
Krishanu Nandy ◽  
David W. Collinson ◽  
Charlie M. Scheftic ◽  
L. Catherine Brinson
Keyword(s):  
Thin Films ◽  
Additive Manufacturing ◽  
Open Source ◽  
Mechanical Characterization ◽  
Tensile Testers

In situ structural characterization of picene thin films by X-ray scattering: Vacuum versus O2 atmosphere

2012 ◽  
Vol 544 ◽  
pp. 34-38 ◽  
Author(s):  
T. Hosokai ◽  
A. Hinderhofer ◽  
A. Vorobiev ◽  
C. Lorch ◽  
T. Watanabe ◽  
...  
Keyword(s):  
Thin Films ◽  
Structural Characterization ◽  
X Ray ◽  
X Ray Scattering ◽  
Ray Scattering
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