The Experts below are selected from a list of 102 Experts worldwide ranked by ideXlab platform
Moataz M Attallah - One of the best experts on this subject based on the ideXlab platform.
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microstructure Magnetic shielding development in additively manufactured ni fe mo Soft Magnet alloy in the as fabricated and post processed conditions
Journal of Alloys and Compounds, 2021Co-Authors: Abd Elmoez A Mohamed, Kai Bongs, Richard Sheridan, Moataz M AttallahAbstract:Abstract This study introduces a deep analysis, which correlates the metallurgical characters with the Magnetic properties in laser powder bed fusion processed Ni-Fe-Mo, to produce 3D prototypes with maximum Magnetic shielding performance for ultra-sensitive quantum-based systems. The study conducts a sequenced plan of optimising the Magnetic properties via microstructure density control, controlling the Magnetic anisotropy, before applying heat treatment (HT) and hot isostatic pressing (HIP) post-processes. This is also considering delivering effective mechanical properties. The Magnetic properties optimisation was performed via laser parametric study, which found that the sample built with laser energy density E = 4.68 J/mm2 achieves the best Soft Magnetic and mechanical results due to the lowest defects. However, the obtained Magnetic properties are still poor, due to the (001) rich grain orientation, which parallels the hard axis of Magnetisation in this alloy. It was found that tilting the crystallographic orientation of the as fabricated (AF) optimised condition with 45˚ and 35˚, with respect to the build direction, improves the Soft Magnetic properties, as these angles correspond to the easy axes of Magnetisation and , respectively, allowing the grain orientation in the same directions. The Magnetic properties are further promoted with HT and HIP post-processes application. The Magnetic shielding results of hollow tubes, built with the same optimised condition, confirmed the Magnetic behaviour of the bulk coupons, achieving 83% of the commercial Magnetic shielding.
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Magnetic shielding promotion via the control of Magnetic anisotropy and thermal post processing in laser powder bed fusion processed nifemo based Soft Magnet
Additive manufacturing, 2020Co-Authors: Abd Elmoez A Mohamed, Ji Zou, Kai Bongs, Richard Sheridan, Moataz M AttallahAbstract:Abstract The aim of this study is to promote the Magnetic shielding characteristics of laser powder bed fusion (LPBF) processed NiFeMo alloy. This was achieved via controlling the crystallographic texture of the builds to increase the grain population along the easy axis of Magnetisation, as well as the use of post-process hydrogen heat treatment (HT) and hot isostatic pressing (HIP) processes. The as-fabricated microstructure typically demonstrates weak Magnetic properties due to the alignment of the crystallographic orientation/spin order along the [100] hard axis of Magnetisation, which is parallel to the build direction since it is also the preferred growth direction during solidification in cubic materials. Tilting the build orientation to align the easy Magnetisation axes [110] and [111] along the build principal directions results in an improvement in the Magnetic shielding characteristics normal and transverse to the build principal directions. Furthermore, the HT/HIP processes further promoted the Soft ferroMagnetic characteristics, with the best Magnetic shielding properties being registered for the [111] tilted sample following both HIP and HT, demonstrating 60–100 folds improvement compared with the as-fabricated condition. The improved ferroMagnetism following HIP + HT was due to several combined effects, including stress relief, consolidation of gas pores, recrystallisation, and grain growth. The post-processing sequence (HT + HIP vs. HIP + HT) appeared to affect the resulting Magnetic characteristics. Finally, the tensile properties for the builds were characterised to ensure that both functional and mechanical behaviours would achieve the required performance.
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controlling the grain orientation during laser powder bed fusion to tailor the Magnetic characteristics in a ni fe based Soft Magnet
Acta Materialia, 2018Co-Authors: Ji Zou, Youssef Gaber, Georgios Voulazeris, L Vazquez, Lei Feng Liu, M Y Yao, Yu Wang, Michael Holynski, Kai Bongs, Moataz M AttallahAbstract:Abstract is the favoured crystal growth direction during solidification of cubic metals. However, it is the hard Magnetisation axis for Ni-rich Soft Magnetic materials. In this work, a strategy to enhance the Magnetic shielding characteristics of laser powder bed processed Soft Magnetic alloy (permalloy-80) through the control of the crystallographic texture was developed. The strategy involves initially assessing the influence of the process parameters on the development of the (001) orientation within dense builds, then tilting the build orientation to achieve a crystallographic orientation along the Magnetisation Soft axis. Using this approach, dense cubic samples with the expected (001) texture were produced, with minimised cracking density. Thereafter, cubic samples tilted to achieve (111) and (110) textures were fabricated, as confirmed by X-ray diffraction and electron backscattered diffraction. Over 200 folds improvement in the Magnetic susceptibility was found in the (111) textured build, compared with the (100) oriented build. The paper highlights the possibility to control the grain orientations to achieve improved Magnetic properties in the build during laser powder bed processing.
Bin Liu - One of the best experts on this subject based on the ideXlab platform.
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x ray single crystal structure and Magnetic properties of kmn h2o 5ru2 co3 4 5h2o a layered Soft Magnet
ChemInform, 2013Co-Authors: Dan Wang, Bin Liu, Jin Jin, Xuemei Liu, Yanyan Jia, Ganglin XueAbstract:The title compound is obtained from an aqueous solution of K3Ru2(CO3)4 and MnSO4 (10 °C, several weeks, 34% yield).
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x ray single crystal structure and Magnetic properties of kmn h2o 5ru2 co3 4 5h2o a layered Soft Magnet
Inorganic Chemistry Communications, 2013Co-Authors: Dan Wang, Bin Liu, Jin Jin, Xuemei Liu, Yanyan Jia, Ganglin XueAbstract:Abstract The temperature manipulation induces the aggregation of Ru2(CO3)43 − paddle-wheel precursors and Mn2 + ions in lower temperature ~ 10 °C forming layer structural complex, K[Mn(H2O)4Ru2(CO3)4]·5H2O (1). It composes of new negative layer {Mn(H2O)5Ru2(CO3)4}nn−, and Magnetic exchanges between spin centers result in ordering below 3.8 K. The observed critical temperature is like the previously reported 3D hetero-metallic carbonates H0.3K0.7Mn[Ru2(CO3)4](H2O)5.5, which demonstrates that it is independent of the interlayer connecting in such heterometallic complexes based on square-grid layer {Ru2(CO3)4}n3n−.
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enhanced Magnetic hardness in a nanoscale metal organic hybrid ferriMagnet
Chemistry: A European Journal, 2012Co-Authors: Lirong Guo, Songsong Bao, Bin Liu, Dai Zeng, Jie Zhao, Limin ZhengAbstract:A new layered metal–organic hybrid compound, namely, [Co3(μ3-OH)2(BTP)2] (1; BTP=4-(3-bromothienyl)phosphonate), is reported. The inorganic layer can be viewed as a pseudo-Kagome lattice composed of corner-sharing irregular triangles of Co3(μ3-OH), with the cavities filled with the PO3 groups. The interlayer space is occupied by the 3-bromothienyl groups of BTP2−. The bulk sample of compound 1 experiences a long-range ferroMagnetic ordering below 30.5 K, with a coercivity (Hc) of 5.04 kOe at 5 K. A systematic study on the size-dependent Magnetic coercivity of 1 reveals that the coercivity of 1 increases with reduced particle size from the micrometer to the nanometer scale. When the particle size is about 50–200 nm, the coercivity reaches 24.2 kOe at 5 K. The results demonstrate that compound 1 can vary from a Soft Magnet to one of the hardest molecule-based Magnets, simply by reducing the particle size to nanoscale region.
Ganglin Xue - One of the best experts on this subject based on the ideXlab platform.
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x ray single crystal structure and Magnetic properties of kmn h2o 5ru2 co3 4 5h2o a layered Soft Magnet
ChemInform, 2013Co-Authors: Dan Wang, Bin Liu, Jin Jin, Xuemei Liu, Yanyan Jia, Ganglin XueAbstract:The title compound is obtained from an aqueous solution of K3Ru2(CO3)4 and MnSO4 (10 °C, several weeks, 34% yield).
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x ray single crystal structure and Magnetic properties of kmn h2o 5ru2 co3 4 5h2o a layered Soft Magnet
Inorganic Chemistry Communications, 2013Co-Authors: Dan Wang, Bin Liu, Jin Jin, Xuemei Liu, Yanyan Jia, Ganglin XueAbstract:Abstract The temperature manipulation induces the aggregation of Ru2(CO3)43 − paddle-wheel precursors and Mn2 + ions in lower temperature ~ 10 °C forming layer structural complex, K[Mn(H2O)4Ru2(CO3)4]·5H2O (1). It composes of new negative layer {Mn(H2O)5Ru2(CO3)4}nn−, and Magnetic exchanges between spin centers result in ordering below 3.8 K. The observed critical temperature is like the previously reported 3D hetero-metallic carbonates H0.3K0.7Mn[Ru2(CO3)4](H2O)5.5, which demonstrates that it is independent of the interlayer connecting in such heterometallic complexes based on square-grid layer {Ru2(CO3)4}n3n−.
Kai Bongs - One of the best experts on this subject based on the ideXlab platform.
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microstructure Magnetic shielding development in additively manufactured ni fe mo Soft Magnet alloy in the as fabricated and post processed conditions
Journal of Alloys and Compounds, 2021Co-Authors: Abd Elmoez A Mohamed, Kai Bongs, Richard Sheridan, Moataz M AttallahAbstract:Abstract This study introduces a deep analysis, which correlates the metallurgical characters with the Magnetic properties in laser powder bed fusion processed Ni-Fe-Mo, to produce 3D prototypes with maximum Magnetic shielding performance for ultra-sensitive quantum-based systems. The study conducts a sequenced plan of optimising the Magnetic properties via microstructure density control, controlling the Magnetic anisotropy, before applying heat treatment (HT) and hot isostatic pressing (HIP) post-processes. This is also considering delivering effective mechanical properties. The Magnetic properties optimisation was performed via laser parametric study, which found that the sample built with laser energy density E = 4.68 J/mm2 achieves the best Soft Magnetic and mechanical results due to the lowest defects. However, the obtained Magnetic properties are still poor, due to the (001) rich grain orientation, which parallels the hard axis of Magnetisation in this alloy. It was found that tilting the crystallographic orientation of the as fabricated (AF) optimised condition with 45˚ and 35˚, with respect to the build direction, improves the Soft Magnetic properties, as these angles correspond to the easy axes of Magnetisation and , respectively, allowing the grain orientation in the same directions. The Magnetic properties are further promoted with HT and HIP post-processes application. The Magnetic shielding results of hollow tubes, built with the same optimised condition, confirmed the Magnetic behaviour of the bulk coupons, achieving 83% of the commercial Magnetic shielding.
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Magnetic shielding promotion via the control of Magnetic anisotropy and thermal post processing in laser powder bed fusion processed nifemo based Soft Magnet
Additive manufacturing, 2020Co-Authors: Abd Elmoez A Mohamed, Ji Zou, Kai Bongs, Richard Sheridan, Moataz M AttallahAbstract:Abstract The aim of this study is to promote the Magnetic shielding characteristics of laser powder bed fusion (LPBF) processed NiFeMo alloy. This was achieved via controlling the crystallographic texture of the builds to increase the grain population along the easy axis of Magnetisation, as well as the use of post-process hydrogen heat treatment (HT) and hot isostatic pressing (HIP) processes. The as-fabricated microstructure typically demonstrates weak Magnetic properties due to the alignment of the crystallographic orientation/spin order along the [100] hard axis of Magnetisation, which is parallel to the build direction since it is also the preferred growth direction during solidification in cubic materials. Tilting the build orientation to align the easy Magnetisation axes [110] and [111] along the build principal directions results in an improvement in the Magnetic shielding characteristics normal and transverse to the build principal directions. Furthermore, the HT/HIP processes further promoted the Soft ferroMagnetic characteristics, with the best Magnetic shielding properties being registered for the [111] tilted sample following both HIP and HT, demonstrating 60–100 folds improvement compared with the as-fabricated condition. The improved ferroMagnetism following HIP + HT was due to several combined effects, including stress relief, consolidation of gas pores, recrystallisation, and grain growth. The post-processing sequence (HT + HIP vs. HIP + HT) appeared to affect the resulting Magnetic characteristics. Finally, the tensile properties for the builds were characterised to ensure that both functional and mechanical behaviours would achieve the required performance.
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controlling the grain orientation during laser powder bed fusion to tailor the Magnetic characteristics in a ni fe based Soft Magnet
Acta Materialia, 2018Co-Authors: Ji Zou, Youssef Gaber, Georgios Voulazeris, L Vazquez, Lei Feng Liu, M Y Yao, Yu Wang, Michael Holynski, Kai Bongs, Moataz M AttallahAbstract:Abstract is the favoured crystal growth direction during solidification of cubic metals. However, it is the hard Magnetisation axis for Ni-rich Soft Magnetic materials. In this work, a strategy to enhance the Magnetic shielding characteristics of laser powder bed processed Soft Magnetic alloy (permalloy-80) through the control of the crystallographic texture was developed. The strategy involves initially assessing the influence of the process parameters on the development of the (001) orientation within dense builds, then tilting the build orientation to achieve a crystallographic orientation along the Magnetisation Soft axis. Using this approach, dense cubic samples with the expected (001) texture were produced, with minimised cracking density. Thereafter, cubic samples tilted to achieve (111) and (110) textures were fabricated, as confirmed by X-ray diffraction and electron backscattered diffraction. Over 200 folds improvement in the Magnetic susceptibility was found in the (111) textured build, compared with the (100) oriented build. The paper highlights the possibility to control the grain orientations to achieve improved Magnetic properties in the build during laser powder bed processing.
Ji Zou - One of the best experts on this subject based on the ideXlab platform.
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Magnetic shielding promotion via the control of Magnetic anisotropy and thermal post processing in laser powder bed fusion processed nifemo based Soft Magnet
Additive manufacturing, 2020Co-Authors: Abd Elmoez A Mohamed, Ji Zou, Kai Bongs, Richard Sheridan, Moataz M AttallahAbstract:Abstract The aim of this study is to promote the Magnetic shielding characteristics of laser powder bed fusion (LPBF) processed NiFeMo alloy. This was achieved via controlling the crystallographic texture of the builds to increase the grain population along the easy axis of Magnetisation, as well as the use of post-process hydrogen heat treatment (HT) and hot isostatic pressing (HIP) processes. The as-fabricated microstructure typically demonstrates weak Magnetic properties due to the alignment of the crystallographic orientation/spin order along the [100] hard axis of Magnetisation, which is parallel to the build direction since it is also the preferred growth direction during solidification in cubic materials. Tilting the build orientation to align the easy Magnetisation axes [110] and [111] along the build principal directions results in an improvement in the Magnetic shielding characteristics normal and transverse to the build principal directions. Furthermore, the HT/HIP processes further promoted the Soft ferroMagnetic characteristics, with the best Magnetic shielding properties being registered for the [111] tilted sample following both HIP and HT, demonstrating 60–100 folds improvement compared with the as-fabricated condition. The improved ferroMagnetism following HIP + HT was due to several combined effects, including stress relief, consolidation of gas pores, recrystallisation, and grain growth. The post-processing sequence (HT + HIP vs. HIP + HT) appeared to affect the resulting Magnetic characteristics. Finally, the tensile properties for the builds were characterised to ensure that both functional and mechanical behaviours would achieve the required performance.
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controlling the grain orientation during laser powder bed fusion to tailor the Magnetic characteristics in a ni fe based Soft Magnet
Acta Materialia, 2018Co-Authors: Ji Zou, Youssef Gaber, Georgios Voulazeris, L Vazquez, Lei Feng Liu, M Y Yao, Yu Wang, Michael Holynski, Kai Bongs, Moataz M AttallahAbstract:Abstract is the favoured crystal growth direction during solidification of cubic metals. However, it is the hard Magnetisation axis for Ni-rich Soft Magnetic materials. In this work, a strategy to enhance the Magnetic shielding characteristics of laser powder bed processed Soft Magnetic alloy (permalloy-80) through the control of the crystallographic texture was developed. The strategy involves initially assessing the influence of the process parameters on the development of the (001) orientation within dense builds, then tilting the build orientation to achieve a crystallographic orientation along the Magnetisation Soft axis. Using this approach, dense cubic samples with the expected (001) texture were produced, with minimised cracking density. Thereafter, cubic samples tilted to achieve (111) and (110) textures were fabricated, as confirmed by X-ray diffraction and electron backscattered diffraction. Over 200 folds improvement in the Magnetic susceptibility was found in the (111) textured build, compared with the (100) oriented build. The paper highlights the possibility to control the grain orientations to achieve improved Magnetic properties in the build during laser powder bed processing.