Results 11 to 20 of about 13,997 (261)
Science and Engineering of Composite Materials, 2021 In this study, a kind of structural gradient metal hollow spheres composites (SG-MHSCs) were fabricated using two kinds of 316L stainless steel hollow spheres with different diameters and A356 aluminum through the casting method.
Wang Chunhe +2 more
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Non-destructive observations of small crack using scanning laser-induced acoustic microscope
Mechanical Engineering Journal, 2016 The scanning laser-induced acoustic microscope (SLAM) has been developed as a tool for non-destructive observations of the defects in materials. It consists of the laser with modulation system, the function generator, the lock-in amplifier, the AE sensor
Atsuhiro KOYAMA +5 more
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Sensors, 2023 Ultrasound imaging is a highly valuable tool in imaging human tissues due to its non-invasive and easily accessible nature. Despite advances in the field of ultrasound research, conventional transducers with frequencies lower than 20 MHz face limitations
Hayong Jung, K. Kirk Shung, Hae Gyun Lim
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A Novel Detection Method for Acoustic Emission Using a Scanning Probe Microscope
Tribology Online, 2016 The fracture of the atomic-scale contact should be investigated for understanding the mechanism of the mechanical processing. Using a combination of the scanning probe microscope (SPM) with possible high space resolution and the acoustic emission (AE ...
Satoru Fujisawa +2 more
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Research on Sparse Representation Method of Acoustic Microimaging Signals
Applied Sciences, 2022 Acoustic microimaging (AMI), a technology for high-resolution imaging of materials using a scanning acoustic microscope, has been widely used for non-destructive testing and evaluation of electronic packages.
Kun Wang +4 more
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Investigation of Local Mechanical Properties of Al-Cu-Li Alloys by Acoustic Microscope
Communications, 2003 The reflected scanning acoustic microscope was used for investigation of elastic properties of extruded Al-Cu-Li alloys. The local sound velocity and attenuation were measured by the V(z) curve method.
Sofia Berezina +2 more
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Examining tunnel current responses to acoustic excitation for STMs in gaseous environments
AIP Advances, 2018 Scanning tunneling microscopes are used to examine surfaces and surface properties with sub-nanometer precision. However, this high precision means these microscopes are extremely sensitive to vibration.
William Myers +2 more
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Enhancement in fire retardant Properties of Coconut Coir/Polyurethane acoustic composites
Journal of Natural Fibers, 2022 This study aims to enhance the flammability properties of coconut coir and polyurethane resin sound-absorbing material. Sound absorption properties of the material for normal sound incidence were measured using impedance tube setup up based on ISO 10534 ...
Nirmala H. Bhingare, S. Prakash
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Penetration Depth of the Scanning Acoustic Microscope [PDF]
IEEE Transactions on Sonics and Ultrasonics, 1985 A definition for the penetration depth of the scanning re- flection acoustic microscope is given. With this definition it is possible to calculate the penetration depth of a given lens geometry for a given material. The penetration depth depends on the elastic parameters of the object, the signal-to-noise ratio, and the operation frequency of the ...
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Direct bonding of aluminum to alumina using a nickel interlayer for power electronics applications
Results in Materials, 2020 Three films of Ni with thicknesses of 100, 300, and 500 nm were deposited on an Al2O3 base and direct bonded with Al to form high-power electronic substrates for comparison. The microstructures of Al/Al2O3 joints were evaluated using a scanning electron
Yu-Ting Wang +3 more
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