The Experts below are selected from a list of 9819 Experts worldwide ranked by ideXlab platform
Di Hu - One of the best experts on this subject based on the ideXlab platform.
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environmental assessment of the Near Net Shape electrochemical metallisation process and the kroll electron beam melting process for titanium manufacture
Green Chemistry, 2020Co-Authors: Aleksei Dolganov, Matthew T Bishop, Marco Tomatis, George Z. Chen, Di HuAbstract:The enforcement of environmental policies, in recent years, has become one of the major driving forces for industrial upgrading. Therefore, this study is focused on the evaluation of the environmental impact of a newly proposed titanium additive manufacturing process, including its in-depth comparison with the conventional method. This new method, referred to as Near-Net-Shape electrochemical metallisation, is based on the in situ metallisation (via the FFC-Cambridge process) of 3D-printed titanium oxide precursors (using direct ink writing process). In order to evaluate the main contributors to the environmental damage and to compare them with the conventional route for titanium manufacturing, the gate-to-gate life cycle assessment has been conducted following the established international standards. From this, the main contributors within the Near-Net-Shape electrochemical metallisation process were identified to be electricity and synthetic rutile, with medium impacts from argon and nickel. It was found that major impacts were challenging to be reduced without affecting the properties of the final product. However, the medium impacts can theoretically be modified, yielding potential improvements in the sustainability of the process by 10%. When compared to the conventional route (consisting of the Kroll process, Free fall gas atomisation and electron beam melting), the end point results demonstrated that, by adopting the Near-Net-Shape electrochemical metallisation process, the overall impact of titanium fabrication was dramatically reduced. Specifically, an average reduction of 68% for the ecosystem, human health and resources was observed.
George Z. Chen - One of the best experts on this subject based on the ideXlab platform.
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environmental assessment of the Near Net Shape electrochemical metallisation process and the kroll electron beam melting process for titanium manufacture
Green Chemistry, 2020Co-Authors: Aleksei Dolganov, Matthew T Bishop, Marco Tomatis, George Z. Chen, Di HuAbstract:The enforcement of environmental policies, in recent years, has become one of the major driving forces for industrial upgrading. Therefore, this study is focused on the evaluation of the environmental impact of a newly proposed titanium additive manufacturing process, including its in-depth comparison with the conventional method. This new method, referred to as Near-Net-Shape electrochemical metallisation, is based on the in situ metallisation (via the FFC-Cambridge process) of 3D-printed titanium oxide precursors (using direct ink writing process). In order to evaluate the main contributors to the environmental damage and to compare them with the conventional route for titanium manufacturing, the gate-to-gate life cycle assessment has been conducted following the established international standards. From this, the main contributors within the Near-Net-Shape electrochemical metallisation process were identified to be electricity and synthetic rutile, with medium impacts from argon and nickel. It was found that major impacts were challenging to be reduced without affecting the properties of the final product. However, the medium impacts can theoretically be modified, yielding potential improvements in the sustainability of the process by 10%. When compared to the conventional route (consisting of the Kroll process, Free fall gas atomisation and electron beam melting), the end point results demonstrated that, by adopting the Near-Net-Shape electrochemical metallisation process, the overall impact of titanium fabrication was dramatically reduced. Specifically, an average reduction of 68% for the ecosystem, human health and resources was observed.
Aleksei Dolganov - One of the best experts on this subject based on the ideXlab platform.
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environmental assessment of the Near Net Shape electrochemical metallisation process and the kroll electron beam melting process for titanium manufacture
Green Chemistry, 2020Co-Authors: Aleksei Dolganov, Matthew T Bishop, Marco Tomatis, George Z. Chen, Di HuAbstract:The enforcement of environmental policies, in recent years, has become one of the major driving forces for industrial upgrading. Therefore, this study is focused on the evaluation of the environmental impact of a newly proposed titanium additive manufacturing process, including its in-depth comparison with the conventional method. This new method, referred to as Near-Net-Shape electrochemical metallisation, is based on the in situ metallisation (via the FFC-Cambridge process) of 3D-printed titanium oxide precursors (using direct ink writing process). In order to evaluate the main contributors to the environmental damage and to compare them with the conventional route for titanium manufacturing, the gate-to-gate life cycle assessment has been conducted following the established international standards. From this, the main contributors within the Near-Net-Shape electrochemical metallisation process were identified to be electricity and synthetic rutile, with medium impacts from argon and nickel. It was found that major impacts were challenging to be reduced without affecting the properties of the final product. However, the medium impacts can theoretically be modified, yielding potential improvements in the sustainability of the process by 10%. When compared to the conventional route (consisting of the Kroll process, Free fall gas atomisation and electron beam melting), the end point results demonstrated that, by adopting the Near-Net-Shape electrochemical metallisation process, the overall impact of titanium fabrication was dramatically reduced. Specifically, an average reduction of 68% for the ecosystem, human health and resources was observed.
Peter Greil - One of the best experts on this subject based on the ideXlab platform.
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Near Net Shape manufacturing of ceramics
Materials Chemistry and Physics, 1999Co-Authors: Peter GreilAbstract:Reduction of shrinkage during fabrication of ceramic components is of particular importance for reduction of machining costs, improvement of dimensional accuracy as well as uniformity of microstructure and properties of complex Shaped components. Processing techniques based on infiltration of fluid phases into porous preforms, reactions between condensed constituents in a green compact and porosity redistribution methods involving novel biomimetic approaches are considered. Basic limitations of novel Near Net Shape techniques will be discussed and potential applications are introduced.
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Near Net Shape manufacturing of ceramic components
Cfi-ceramic Forum International, 1998Co-Authors: Peter GreilAbstract:Reduction of shrinkage during fabrication of ceramic components is of particular importance for the reduction of machining costs, the improvement of dimensional accuracy, as well as for the uniformity of microstructure and properties of complex Shaped components. Processing techniques based on infiltration of fluid phases into porous preforms, eactions between condensed constituents in a green compact, and porosity redistribution methods involving novel biomimetic approaches are considered. Basic limitations of novel Near Net Shape techniques will be discussed and potential applications introduced.
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Near Net Shape manufacturing of polymer derived ceramics
Journal of The European Ceramic Society, 1997Co-Authors: Peter GreilAbstract:Abstract Pyrolytic conversion of preceramic polymers loaded with active filler particles offers the possibility of Near Net Shape manufacturing of bulk ceramic components from polymers. Active fillers based on elements (B, Si, Al, Ti, Mo, etc.), intermetallics (CrSi2, MoSi2, etc.) or ceramic compounds (AlN, B4C, etc.) which react with the solid and gaseous decomposition products of the preceramic polymer (polysilane, -carbosilane, -silazane, siloxane, etc.) during pyrolysis may form carbide, nitride or oxide reaction products in the polymer derived amorphous or microcrystalline matrix. The main effects of the active fillers are to form a stabilizing Network of the filler reaction products, increase ceramic yield of the polymer, and to provide internal surface for material transport during polymer decomposition reactions. Thus, dimensional change, porosity formation as well as material properties can be tailored in a wide range by combination of a variety of polymers, fillers and reaction atmospheres.
Matthew T Bishop - One of the best experts on this subject based on the ideXlab platform.
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environmental assessment of the Near Net Shape electrochemical metallisation process and the kroll electron beam melting process for titanium manufacture
Green Chemistry, 2020Co-Authors: Aleksei Dolganov, Matthew T Bishop, Marco Tomatis, George Z. Chen, Di HuAbstract:The enforcement of environmental policies, in recent years, has become one of the major driving forces for industrial upgrading. Therefore, this study is focused on the evaluation of the environmental impact of a newly proposed titanium additive manufacturing process, including its in-depth comparison with the conventional method. This new method, referred to as Near-Net-Shape electrochemical metallisation, is based on the in situ metallisation (via the FFC-Cambridge process) of 3D-printed titanium oxide precursors (using direct ink writing process). In order to evaluate the main contributors to the environmental damage and to compare them with the conventional route for titanium manufacturing, the gate-to-gate life cycle assessment has been conducted following the established international standards. From this, the main contributors within the Near-Net-Shape electrochemical metallisation process were identified to be electricity and synthetic rutile, with medium impacts from argon and nickel. It was found that major impacts were challenging to be reduced without affecting the properties of the final product. However, the medium impacts can theoretically be modified, yielding potential improvements in the sustainability of the process by 10%. When compared to the conventional route (consisting of the Kroll process, Free fall gas atomisation and electron beam melting), the end point results demonstrated that, by adopting the Near-Net-Shape electrochemical metallisation process, the overall impact of titanium fabrication was dramatically reduced. Specifically, an average reduction of 68% for the ecosystem, human health and resources was observed.
