The Experts below are selected from a list of 30 Experts worldwide ranked by ideXlab platform
Antoine Guitton - One of the best experts on this subject based on the ideXlab platform.
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Frank Partial Dislocation in Ti2AlC-MAX phase induced by matrix-Cu diffusion
Scripta Materialia, 2021Co-Authors: Julien Guénolé, Jaafar Ghanbaja, Maxime Vallet, Antoine GuittonAbstract:The control of complex nanostructures is one of the most promising strategy for designing tailored property materials. Ti2AlC, as nanolayered ternary materials combining both ceramics and metals properties, could efficiently reinforce metal matrix composite by its decomposition into nano-Ti2C particles. However, the comprehensive description of the diffusion mechanisms of Cu element into Ti2AlC during its decomposition has not yet been revealed. Herein, we report detailed characterizations of Cu and Ti2AlC interlayers by means of high-resolution electron microscopy and atomic-scale simulations. In particular, we report the formation of Ti2AlxCuyC solid solutions. Furthermore, we demonstrate the formation of Ti2C platelets and evidenced Frank Partial Dislocations that are not expected to be found in such material. Impacts of such defects are discussed in the framework of mechanical behavior.
Michael J Oloughlin - One of the best experts on this subject based on the ideXlab platform.
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structure of the carrot defect in 4h sic epitaxial layers
Applied Physics Letters, 2005Co-Authors: Mourad Benamara, X Zhang, M Skowronski, P Ruterana, G Nouet, Joseph John Sumakeris, Michael James Paisley, Michael J OloughlinAbstract:Transmission electron microscopy and KOH etching were used to determine the structure of the carrot defect in 4H-SiC epilayers. The defect consists of two intersecting planar faults on prismatic {11¯00} and basal {0001} planes. Both faults are connected by a stair-rod Dislocation with Burgers vector 1∕n [101¯0] with n>3 at the crossover. A Frank-Partial Dislocation with b=1∕12[44¯03] terminates the basal fault.
Julien Guénolé - One of the best experts on this subject based on the ideXlab platform.
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Frank Partial Dislocation in Ti2AlC-MAX phase induced by matrix-Cu diffusion
Scripta Materialia, 2021Co-Authors: Julien Guénolé, Jaafar Ghanbaja, Maxime Vallet, Antoine GuittonAbstract:The control of complex nanostructures is one of the most promising strategy for designing tailored property materials. Ti2AlC, as nanolayered ternary materials combining both ceramics and metals properties, could efficiently reinforce metal matrix composite by its decomposition into nano-Ti2C particles. However, the comprehensive description of the diffusion mechanisms of Cu element into Ti2AlC during its decomposition has not yet been revealed. Herein, we report detailed characterizations of Cu and Ti2AlC interlayers by means of high-resolution electron microscopy and atomic-scale simulations. In particular, we report the formation of Ti2AlxCuyC solid solutions. Furthermore, we demonstrate the formation of Ti2C platelets and evidenced Frank Partial Dislocations that are not expected to be found in such material. Impacts of such defects are discussed in the framework of mechanical behavior.
Mourad Benamara - One of the best experts on this subject based on the ideXlab platform.
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structure of the carrot defect in 4h sic epitaxial layers
Applied Physics Letters, 2005Co-Authors: Mourad Benamara, X Zhang, M Skowronski, P Ruterana, G Nouet, Joseph John Sumakeris, Michael James Paisley, Michael J OloughlinAbstract:Transmission electron microscopy and KOH etching were used to determine the structure of the carrot defect in 4H-SiC epilayers. The defect consists of two intersecting planar faults on prismatic {11¯00} and basal {0001} planes. Both faults are connected by a stair-rod Dislocation with Burgers vector 1∕n [101¯0] with n>3 at the crossover. A Frank-Partial Dislocation with b=1∕12[44¯03] terminates the basal fault.
Guitton Antoine - One of the best experts on this subject based on the ideXlab platform.
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Frank Partial Dislocation in Ti2AlC-MAX phase induced by matrix-Cu diffusion
'Elsevier BV', 2021Co-Authors: Yu Wenbo, Guénolé Julien, Ghanbaja Jaafar, Vallet Maxime, Guitton AntoineAbstract:International audienceThe control of complex nanostructures is one of the most promising strategy for designing tailored property materials. Ti2AlC, as nanolayered ternary materials combining both ceramics and metals properties, could efficiently reinforce metal matrix composite by its decomposition into nano-Ti2C particles. However, the comprehensive description of the diffusion mechanisms of Cu element into Ti2AlC during its decomposition has not yet been revealed. Herein, we report detailed characterizations of Cu and Ti2AlC interlayers by means of high-resolution electron microscopy and atomic-scale simulations. In particular, we report the formation of Ti2AlxCuyC solid solutions. Furthermore, we demonstrate the formation of Ti2C platelets and evidenced Frank Partial Dislocations that are not expected to be found in such material. Impacts of such defects are discussed in the framework of mechanical behavior
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Frank Partial Dislocation in Ti2AlC-MAX phase induced by matrix-Cu diffusion
HAL CCSD, 2021Co-Authors: Yu Wenbo, Guénolé Julien, Ghanbaja Jaafar, Vallet Maxime, Guitton AntoineAbstract:International audienceThe control of complex nanostructures is one of the most promising strategy to design tailored properties materials. Composites are often good candidates, especially with complex phases. MAX phases have remarkable properties such as low density, high modulus, good metallic conductivity, self-lubrication properties and unique mechanical behaviors both at room and high temperatures.Copper is one of the most used metals essentially because of its very high electrical conductivity. However, its low strength and its low wear resistance properties result in premature failure of components, thus restricting its wide range of applications, particularly in homopolar machines and in overhead current lines for railway. One possible route for overtaking these obstacles is to introduce into a Cu matrix, layered ternary MAX phases, such as Ti2AlC.Here we report the comprehensive description of the diffusion mechanisms of Cu-matrix elements in Ti2AlC-MAX phase interlayers by means of high-resolution electron microscopy and atomic-scale simulations. In particular, we demonstrate the formation of Ti2C platelets and evidenced Frank Partial Dislocations that are not expected to be found in such material. These defects have an extensive impact on the properties of the composite as they can largely improve mechanical responses and molecule segregation
