The Experts below are selected from a list of 66252 Experts worldwide ranked by ideXlab platform
William J. Weber - One of the best experts on this subject based on the ideXlab platform.
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effects of fe concentration on the ion irradiation Induced Defect evolution and hardening in ni fe solid solution alloys
Acta Materialia, 2016Co-Authors: Chenyang Lu, Lumin Wang, William J. Weber, Mohammad W Ullah, Jonathan D Poplawsky, Yanwen ZhangAbstract:Abstract Understanding alloying effects on the irradiation response of structural materials is pivotal in nuclear engineering. To systematically explore the effects of Fe concentration on the irradiation-Induced Defect evolution and hardening in face-centered cubic Ni-Fe binary solid solution alloys, single crystalline Ni-xFe (x = 0–60 at%) alloys have been grown and irradiated with 1.5 MeV Ni ions. The irradiations have been performed over a wide range of fluences from 3 × 1013 to 3 × 1016 cm−2 at room temperature. Ion channeling technique has shown reduced damage accumulation with increasing Fe concentration in the low fluence regime, which is consistent to the results from molecular dynamic simulations. No irradiation-Induced compositional segregation was observed in atom probe tomography within the detection limit, even in the samples irradiated with high fluence Ni ions. Transmission electron microscopy analyses have further demonstrated that the Defect size significantly decreases with increasing Fe concentration, indicating a delay in Defect evolution. Furthermore, irradiation Induced hardening has been measured by nanoindentation tests. Ni and the Ni-Fe alloys have largely different initial hardness, but they all follow a similar trend for the increase of hardness as a function of irradiation fluence.
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molecular dynamics simulations of swift heavy ion Induced Defect recovery in sic
Computational Materials Science, 2013Co-Authors: William J. Weber, Flyura Djurabekova, M Toulemonde, Olli H Pakarinen, N Juslin, K Nordlund, A Debelle, Marie BackmanAbstract:Swift heavy ions induce a high density of electronic excitations that can cause the formation of amorphous ion tracks in insulators. No ion tracks have been observed in the semiconductor SiC, but recent experimental work suggests that irradiation damaged SiC can undergo Defect recovery under swift heavy ion irradiation. It is believed that local heating of the lattice due to the electronic energy deposition can anneal, and thereby recover, some of the disordered structure. We simulate the local heating due to the ions by the inelastic thermal spike model and perform molecular dynamics simulations of different model damage states to study the Defect recovery on an atomistic level. We find significant recovery of point Defects and a disordered layer, as well as recrystallization at the amorphous-to-crystalline interface of an amorphous layer. The simulation results support the swift heavy ion annealing hypothesis.
D A Maclaren - One of the best experts on this subject based on the ideXlab platform.
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high resolution structural characterisation of laser Induced Defect clusters inside diamond
Applied Physics Letters, 2017Co-Authors: Patrick S Salter, Martin J Booth, Arnaud Courvoisier, D A J Moran, D A MaclarenAbstract:Laser writing with ultrashort pulses provides a potential route for the manufacture of three-dimensional wires, waveguides, and Defects within diamond. We present a transmission electron microscopy study of the intrinsic structure of the laser modifications and reveal a complex distribution of Defects. Electron energy loss spectroscopy indicates that the majority of the irradiated region remains as sp3 bonded diamond. Electrically conductive paths are attributed to the formation of multiple nano-scale, sp2-bonded graphitic wires and a network of strain-relieving micro-cracks.
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high resolution structural characterisation of laser Induced Defect clusters inside diamond
arXiv: Applied Physics, 2017Co-Authors: Patrick S Salter, Martin J Booth, Arnaud Courvoisier, D A J Moran, D A MaclarenAbstract:Laser writing with ultrashort pulses provides a potential route for the manufacture of three-dimensional wires, waveguides and Defects within diamond. We present a transmission electron microscopy (TEM) study of the intrinsic structure of the laser modifications and reveal a complex distribution of Defects. Electron energy loss spectroscopy (EELS) indicates that the majority of the irradiated region remains as $sp^3$ bonded diamond. Electrically-conductive paths are attributed to the formation of multiple nano-scale, $sp^2$-bonded graphitic wires and a network of strain-relieving micro-cracks.
Lane W Martin - One of the best experts on this subject based on the ideXlab platform.
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enhancement of ferroelectric curie temperature in batio3 films via strain Induced Defect dipole alignment
Advanced Materials, 2014Co-Authors: Anoop R Damodaran, Eric Breckenfeld, Zuhuang Chen, Sungki Lee, Lane W MartinAbstract:The combination of epitaxial strain and Defect engineering facilitates the tuning of the transition temperature of BaTiO3 to >800 °C. Advances in thin-film deposition enable the utilization of both the electric and elastic dipoles of Defects to extend the epitaxial strain to new levels, inducing unprecedented functionality and temperature stability in ferroelectrics.
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enhancement of ferroelectric curie temperature in batio3 films via strain Induced Defect dipole alignment
Advanced Materials, 2014Co-Authors: Anoop R Damodaran, Eric Breckenfeld, Zuhuang Chen, Lane W MartinAbstract:Author(s): Damodaran, Anoop R; Breckenfeld, Eric; Chen, Zuhuang; Lee, Sungki; Martin, Lane W | Abstract: The combination of epitaxial strain and Defect engineering facilitates the tuning of the transition temperature of BaTiO3 to g800 °C. Advances in thin-film deposition enable the utilization of both the electric and elastic dipoles of Defects to extend the epitaxial strain to new levels, inducing unprecedented functionality and temperature stability in ferroelectrics.
Patrick S Salter - One of the best experts on this subject based on the ideXlab platform.
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high resolution structural characterisation of laser Induced Defect clusters inside diamond
Applied Physics Letters, 2017Co-Authors: Patrick S Salter, Martin J Booth, Arnaud Courvoisier, D A J Moran, D A MaclarenAbstract:Laser writing with ultrashort pulses provides a potential route for the manufacture of three-dimensional wires, waveguides, and Defects within diamond. We present a transmission electron microscopy study of the intrinsic structure of the laser modifications and reveal a complex distribution of Defects. Electron energy loss spectroscopy indicates that the majority of the irradiated region remains as sp3 bonded diamond. Electrically conductive paths are attributed to the formation of multiple nano-scale, sp2-bonded graphitic wires and a network of strain-relieving micro-cracks.
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high resolution structural characterisation of laser Induced Defect clusters inside diamond
arXiv: Applied Physics, 2017Co-Authors: Patrick S Salter, Martin J Booth, Arnaud Courvoisier, D A J Moran, D A MaclarenAbstract:Laser writing with ultrashort pulses provides a potential route for the manufacture of three-dimensional wires, waveguides and Defects within diamond. We present a transmission electron microscopy (TEM) study of the intrinsic structure of the laser modifications and reveal a complex distribution of Defects. Electron energy loss spectroscopy (EELS) indicates that the majority of the irradiated region remains as $sp^3$ bonded diamond. Electrically-conductive paths are attributed to the formation of multiple nano-scale, $sp^2$-bonded graphitic wires and a network of strain-relieving micro-cracks.
Anoop R Damodaran - One of the best experts on this subject based on the ideXlab platform.
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enhancement of ferroelectric curie temperature in batio3 films via strain Induced Defect dipole alignment
Advanced Materials, 2014Co-Authors: Anoop R Damodaran, Eric Breckenfeld, Zuhuang Chen, Sungki Lee, Lane W MartinAbstract:The combination of epitaxial strain and Defect engineering facilitates the tuning of the transition temperature of BaTiO3 to >800 °C. Advances in thin-film deposition enable the utilization of both the electric and elastic dipoles of Defects to extend the epitaxial strain to new levels, inducing unprecedented functionality and temperature stability in ferroelectrics.
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enhancement of ferroelectric curie temperature in batio3 films via strain Induced Defect dipole alignment
Advanced Materials, 2014Co-Authors: Anoop R Damodaran, Eric Breckenfeld, Zuhuang Chen, Lane W MartinAbstract:Author(s): Damodaran, Anoop R; Breckenfeld, Eric; Chen, Zuhuang; Lee, Sungki; Martin, Lane W | Abstract: The combination of epitaxial strain and Defect engineering facilitates the tuning of the transition temperature of BaTiO3 to g800 °C. Advances in thin-film deposition enable the utilization of both the electric and elastic dipoles of Defects to extend the epitaxial strain to new levels, inducing unprecedented functionality and temperature stability in ferroelectrics.
