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Showing 1 to 12 of 12 for “"Resonant ultrasound spectroscopy"”.
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A resonant ultrasound spectroscopy study of hydrogen-absorbing intermetallic compounds
Resonant ultrasound spectroscopy (RUS) has been, used to study four different hydrogen-absorbing intermetallic compounds. A fundamental study of the properties of hydrogen motion within a host metal lattice was undertaken, on two different Cl5 Laves-phase compounds. These results have been obtained …
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High Temperature And Pressure Resonant Ultrasound Spectroscopy Study Of Metal Hydride Systems
… example of metal hydride systems using the resonant ultrasound spectroscopy. A high temperature and high pressure resonant ultrasound spectroscopy system which include the RUS cell and the direct contact transducer set-up was designed and constructed. The temperature and pressure dependent …
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Measuring elastic constants of laminated Copper/Niobium composites using resonant ultrasound spectroscopy
… of Cu/Nb interfaces. Our work relied on resonant ultrasound spectroscopy (RUS): a technique for deducing elastic constants from measured resonance frequencies. Resonance frequencies of three samples with differing layer widths were measured. A numerical approach for matching measured and …
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Temperature And Pressure Effects On Elastic Properties Of Relaxor Ferroelectrics And Thermoelectrics: A Resonant Ultrasound Spectroscopy Study
… phase boundary (MPB) was investigated using a resonant ultrasound spectroscopy (RUS) methodologies in the temperature range of 293 K - 800 K and the pressure range from near vacuum to 3.4 MPa. At atmospheric pressure, significantly high acoustic attenuation of PMN-PT is observed at temperatures …
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Novel approaches for the characterisation of spinodal alloys
… thesis explores the utility of two techniques, resonant ultrasound spectroscopy and high‑resolution synchrotron X‑ray diffraction, for investigating the phase transformations that operate in spinodal alloys. Both techniques were employed to characterise the ageing response of the industrially …
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ZrB2-SiC Based Ultra High Temperature Ceramic Composites: Mechanical Performance and Measurement and Design of Thermal Residual Stresses for Hypersonic Vehicle Applications
… fracture strength and fracture toughness. Resonant Ultrasound Spectroscopy was used for measurement of Young's, shear, and bulk moduli as well as Poisson's ratio of the composites. The distribution of thermal residual stresses and the effect of the applied external load on their …
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Compositional Optimisation of a Ni-based Superalloy for Additive Repair Applications
… of heat treatment time and duration using Resonant Ultrasound Spectroscopy (RUS). To control the crystallographic texture formed, the addition of niobium carbide (NbC) inoculant particles to the precursor powder was investigated. It was observed that the inoculants enhanced the formation of …
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Investigation of carburization extent from the inner diameter (ID) of ethylene furnace tubes using non-destructive examination (NDE) applied on the outer diameter (OD)
… frequencies, b) metallographic evaluation, c) resonant ultrasound spectroscopy (RUS), and d) computational modeling to simulate guided wave and ultrasonic phased array technique. The collaboration of the results of these experiments demonstrated the possibility that ultrasonic phased array can …
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Geopolymer composites and their applications in stress wave mitigation
… methods such as impulse excitation (IE) and resonant ultrasound spectroscopy (RUS) and compared with various theoretical models. Graphene nanoplatelets have high mechanical, electrical and thermal properties that can significantly improve the desired properties of composites at even low …
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Evolution of the structure and properties of thermomechanically-processed metallic glasses
… in-situ synchrotron diffraction and cryogenic resonant ultrasound spectroscopy. The results show an asymmetric structural evolution during cooling and heating, challenging the conventional view that the glassy state is isoconfigurational during cooling and heating at relatively low …
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High-temperature superconductivity in a family of iron pnictide materials
… the understanding of the field via a series of Resonant Ultrasound Spectroscopic experiments conducted by a collaborator on my crystals and analysed by me. I see distinct first-order transitions in the parent compounds, characterisable above the high-T structural transition within a …
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Domain wall dynamics and neuronic crackling noise
… in WO<sub>3</sub> from 300 K - 180 K using resonant ultrasound spectroscopy, and resonant piezoelectric spectroscopy which showed that the $P2_1/n$, $P\bar{1}$, and $P2_1/c$ phases give a piezoelectric response despite the bulk being nominally centrosymmetric. Second harmonic generation …