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E. J. Mittemeijer - One of the best experts on this subject based on the ideXlab platform.
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the microstructure of the Diffusion Zone of a gaseously nitrided fe 1 5 wt cr 1 5 wt al alloy
Materials Science and Technology, 2010Co-Authors: A. R. Clauss, Ewald Bischoff, R. E. Schacherl, E. J. MittemeijerAbstract:AbstractGaseous nitriding experiments of an Fe–1·5 wt-%Cr–1·5 wt-%Al (i.e. Fe–1·6 at.-%Cr–3·1 at.-%Al) alloy were carried out as a function of time at 853 K. The microstructure of the Diffusion Zone was characterised by microhardness, electron probe microanalysis (EPMA), X-ray diffraction analysis (XRD), scanning transmission electron microscopy (STEM) in combination with energy dispersive X-ray spectroscopy (EDX) and Auger electron spectroscopy (AES). Chromium and aluminium precipitate together as a mixed Cr1−xAlxN phase in the Diffusion Zone. The size of the (semi)coherent precipitates and the amount of excess nitrogen have a strong influence on the microstructure of the Diffusion Zone. Crack formation occurs after a certain nitriding time starting from the specimen surface and propagating along grain boundaries more or less perpendicularly to the surface towards larger depth. The grain boundary brittleness could be ascribed to the precipitation of excess nitrogen as nitrogen gas at the grain boundaries...
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The microstructure of the Diffusion Zone of a gaseously nitrided Fe–1·5 wt-%Cr–1·5 wt-%Al alloy
Materials Science and Technology, 2010Co-Authors: A. R. Clauss, Ewald Bischoff, R. E. Schacherl, E. J. MittemeijerAbstract:AbstractGaseous nitriding experiments of an Fe–1·5 wt-%Cr–1·5 wt-%Al (i.e. Fe–1·6 at.-%Cr–3·1 at.-%Al) alloy were carried out as a function of time at 853 K. The microstructure of the Diffusion Zone was characterised by microhardness, electron probe microanalysis (EPMA), X-ray diffraction analysis (XRD), scanning transmission electron microscopy (STEM) in combination with energy dispersive X-ray spectroscopy (EDX) and Auger electron spectroscopy (AES). Chromium and aluminium precipitate together as a mixed Cr1−xAlxN phase in the Diffusion Zone. The size of the (semi)coherent precipitates and the amount of excess nitrogen have a strong influence on the microstructure of the Diffusion Zone. Crack formation occurs after a certain nitriding time starting from the specimen surface and propagating along grain boundaries more or less perpendicularly to the surface towards larger depth. The grain boundary brittleness could be ascribed to the precipitation of excess nitrogen as nitrogen gas at the grain boundaries...
A. R. Clauss - One of the best experts on this subject based on the ideXlab platform.
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the microstructure of the Diffusion Zone of a gaseously nitrided fe 1 5 wt cr 1 5 wt al alloy
Materials Science and Technology, 2010Co-Authors: A. R. Clauss, Ewald Bischoff, R. E. Schacherl, E. J. MittemeijerAbstract:AbstractGaseous nitriding experiments of an Fe–1·5 wt-%Cr–1·5 wt-%Al (i.e. Fe–1·6 at.-%Cr–3·1 at.-%Al) alloy were carried out as a function of time at 853 K. The microstructure of the Diffusion Zone was characterised by microhardness, electron probe microanalysis (EPMA), X-ray diffraction analysis (XRD), scanning transmission electron microscopy (STEM) in combination with energy dispersive X-ray spectroscopy (EDX) and Auger electron spectroscopy (AES). Chromium and aluminium precipitate together as a mixed Cr1−xAlxN phase in the Diffusion Zone. The size of the (semi)coherent precipitates and the amount of excess nitrogen have a strong influence on the microstructure of the Diffusion Zone. Crack formation occurs after a certain nitriding time starting from the specimen surface and propagating along grain boundaries more or less perpendicularly to the surface towards larger depth. The grain boundary brittleness could be ascribed to the precipitation of excess nitrogen as nitrogen gas at the grain boundaries...
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The microstructure of the Diffusion Zone of a gaseously nitrided Fe–1·5 wt-%Cr–1·5 wt-%Al alloy
Materials Science and Technology, 2010Co-Authors: A. R. Clauss, Ewald Bischoff, R. E. Schacherl, E. J. MittemeijerAbstract:AbstractGaseous nitriding experiments of an Fe–1·5 wt-%Cr–1·5 wt-%Al (i.e. Fe–1·6 at.-%Cr–3·1 at.-%Al) alloy were carried out as a function of time at 853 K. The microstructure of the Diffusion Zone was characterised by microhardness, electron probe microanalysis (EPMA), X-ray diffraction analysis (XRD), scanning transmission electron microscopy (STEM) in combination with energy dispersive X-ray spectroscopy (EDX) and Auger electron spectroscopy (AES). Chromium and aluminium precipitate together as a mixed Cr1−xAlxN phase in the Diffusion Zone. The size of the (semi)coherent precipitates and the amount of excess nitrogen have a strong influence on the microstructure of the Diffusion Zone. Crack formation occurs after a certain nitriding time starting from the specimen surface and propagating along grain boundaries more or less perpendicularly to the surface towards larger depth. The grain boundary brittleness could be ascribed to the precipitation of excess nitrogen as nitrogen gas at the grain boundaries...
R. E. Schacherl - One of the best experts on this subject based on the ideXlab platform.
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the microstructure of the Diffusion Zone of a gaseously nitrided fe 1 5 wt cr 1 5 wt al alloy
Materials Science and Technology, 2010Co-Authors: A. R. Clauss, Ewald Bischoff, R. E. Schacherl, E. J. MittemeijerAbstract:AbstractGaseous nitriding experiments of an Fe–1·5 wt-%Cr–1·5 wt-%Al (i.e. Fe–1·6 at.-%Cr–3·1 at.-%Al) alloy were carried out as a function of time at 853 K. The microstructure of the Diffusion Zone was characterised by microhardness, electron probe microanalysis (EPMA), X-ray diffraction analysis (XRD), scanning transmission electron microscopy (STEM) in combination with energy dispersive X-ray spectroscopy (EDX) and Auger electron spectroscopy (AES). Chromium and aluminium precipitate together as a mixed Cr1−xAlxN phase in the Diffusion Zone. The size of the (semi)coherent precipitates and the amount of excess nitrogen have a strong influence on the microstructure of the Diffusion Zone. Crack formation occurs after a certain nitriding time starting from the specimen surface and propagating along grain boundaries more or less perpendicularly to the surface towards larger depth. The grain boundary brittleness could be ascribed to the precipitation of excess nitrogen as nitrogen gas at the grain boundaries...
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The microstructure of the Diffusion Zone of a gaseously nitrided Fe–1·5 wt-%Cr–1·5 wt-%Al alloy
Materials Science and Technology, 2010Co-Authors: A. R. Clauss, Ewald Bischoff, R. E. Schacherl, E. J. MittemeijerAbstract:AbstractGaseous nitriding experiments of an Fe–1·5 wt-%Cr–1·5 wt-%Al (i.e. Fe–1·6 at.-%Cr–3·1 at.-%Al) alloy were carried out as a function of time at 853 K. The microstructure of the Diffusion Zone was characterised by microhardness, electron probe microanalysis (EPMA), X-ray diffraction analysis (XRD), scanning transmission electron microscopy (STEM) in combination with energy dispersive X-ray spectroscopy (EDX) and Auger electron spectroscopy (AES). Chromium and aluminium precipitate together as a mixed Cr1−xAlxN phase in the Diffusion Zone. The size of the (semi)coherent precipitates and the amount of excess nitrogen have a strong influence on the microstructure of the Diffusion Zone. Crack formation occurs after a certain nitriding time starting from the specimen surface and propagating along grain boundaries more or less perpendicularly to the surface towards larger depth. The grain boundary brittleness could be ascribed to the precipitation of excess nitrogen as nitrogen gas at the grain boundaries...
Ewald Bischoff - One of the best experts on this subject based on the ideXlab platform.
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the microstructure of the Diffusion Zone of a gaseously nitrided fe 1 5 wt cr 1 5 wt al alloy
Materials Science and Technology, 2010Co-Authors: A. R. Clauss, Ewald Bischoff, R. E. Schacherl, E. J. MittemeijerAbstract:AbstractGaseous nitriding experiments of an Fe–1·5 wt-%Cr–1·5 wt-%Al (i.e. Fe–1·6 at.-%Cr–3·1 at.-%Al) alloy were carried out as a function of time at 853 K. The microstructure of the Diffusion Zone was characterised by microhardness, electron probe microanalysis (EPMA), X-ray diffraction analysis (XRD), scanning transmission electron microscopy (STEM) in combination with energy dispersive X-ray spectroscopy (EDX) and Auger electron spectroscopy (AES). Chromium and aluminium precipitate together as a mixed Cr1−xAlxN phase in the Diffusion Zone. The size of the (semi)coherent precipitates and the amount of excess nitrogen have a strong influence on the microstructure of the Diffusion Zone. Crack formation occurs after a certain nitriding time starting from the specimen surface and propagating along grain boundaries more or less perpendicularly to the surface towards larger depth. The grain boundary brittleness could be ascribed to the precipitation of excess nitrogen as nitrogen gas at the grain boundaries...
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The microstructure of the Diffusion Zone of a gaseously nitrided Fe–1·5 wt-%Cr–1·5 wt-%Al alloy
Materials Science and Technology, 2010Co-Authors: A. R. Clauss, Ewald Bischoff, R. E. Schacherl, E. J. MittemeijerAbstract:AbstractGaseous nitriding experiments of an Fe–1·5 wt-%Cr–1·5 wt-%Al (i.e. Fe–1·6 at.-%Cr–3·1 at.-%Al) alloy were carried out as a function of time at 853 K. The microstructure of the Diffusion Zone was characterised by microhardness, electron probe microanalysis (EPMA), X-ray diffraction analysis (XRD), scanning transmission electron microscopy (STEM) in combination with energy dispersive X-ray spectroscopy (EDX) and Auger electron spectroscopy (AES). Chromium and aluminium precipitate together as a mixed Cr1−xAlxN phase in the Diffusion Zone. The size of the (semi)coherent precipitates and the amount of excess nitrogen have a strong influence on the microstructure of the Diffusion Zone. Crack formation occurs after a certain nitriding time starting from the specimen surface and propagating along grain boundaries more or less perpendicularly to the surface towards larger depth. The grain boundary brittleness could be ascribed to the precipitation of excess nitrogen as nitrogen gas at the grain boundaries...
Kwang-lung Lin - One of the best experts on this subject based on the ideXlab platform.
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The early stage dissolution of Ni and the nucleation of Ni–Sn intermetallic compound at the interface during the soldering of Sn–3.5Ag on a Ni substrate
Journal of Applied Physics, 2010Co-Authors: Yu-wei Lin, Kwang-lung LinAbstract:The early stage soldering reaction, reflow for 5 s at 250 °C followed by a liquid nitrogen quench, of Sn–3.5Ag on an electroplated Ni substrate gives rise to a Ni dissolution Zone, an amorphous Ni–Sn Diffusion Zone, and nuclei of NiSn intermetallic compound within the interfacial region. The nucleation of NiSn takes place at the interface between the dissolution Zone and the amorphous Diffusion Zone as well as within the amorphous Ni–Sn Diffusion Zone, producing 10 nm nanocrystallites. High resolution transmission electron microscope observations indicate that NiSn is the preliminary intermetallic compound that forms during the soldering reaction.
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The atomic-scale studies of the behavior of the crystal dissolution in a molten metal
Chemical Physics Letters, 2005Co-Authors: Kwang-lung LinAbstract:Abstract The early atomic-scale dissolution behavior of Cu in a molten pure Sn was studied by transmission electron microscope (TEM). The innermost region adjacent to the Cu lattice is an amorphous Cu–Sn Diffusion Zone that contains dispersed e-Cu 3 Sn nanocrystalline cells. The zigzag morphology reveal between Cu lattice and amorphous Cu–Sn Diffusion Zone. The height of step is about 0.2–1.1 nm on the terrace. The formation of zigzag morphology is initiated by preferential removal of Cu atoms from the kink sites on the crystal surface. The dissolved atoms form an amorphous Cu–Sn Diffusion Zone. This Diffusion Zone is a non-saturated state prior to further formation of crystalline cell.