The Experts below are selected from a list of 60 Experts worldwide ranked by ideXlab platform
Jeffrey R Alcock - One of the best experts on this subject based on the ideXlab platform.
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creating movable interfaces by micro powder injection moulding
Journal of Materials Processing Technology, 2014Co-Authors: Usama M Attia, M Hauata, I Walton, Daniele Annicchiarico, Jeffrey R AlcockAbstract:Abstract This paper presents a novel in situ technique to produce articulated components with high-precision, micro-scale movable interfaces by micro-powder injection moulding (μPIM). The presented process route is based on the use of micro-scale sacrificial layer between the movable subcomponents which is eliminated during the Debinding step, creating a dimensionally-controlled, micro-scale mobile interface. The fabrication technique combines the advantages of micro-powder overmoulding, Catalytic Debinding and sintering. The demonstrated example was a finger bone prosthesis joint consisting of two sub-components with an interface between components of 200 μm in size. The geometries of the sub-components were designed such that they are inseparable throughout the process whilst allowing them to move relative to each other after the Debinding stage. The components produced showed the feasibility of the process route to produce readily-assembled meso-, and potentially micro-, scale articulated systems.
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fabrication of hollow 3d micro scale metallic structures by micro powder injection moulding
Journal of Materials Processing Technology, 2012Co-Authors: Usama M Attia, Jeffrey R AlcockAbstract:Abstract Architectures of current micro-scale metallic structures are unable to meet some requirements of micro-component designers, particularly when a design calls for truly three-dimensional internal micro-geometries. Such complex geometries are particularly important for emerging microsystem applications such as high-performance microfluidics for analytical applications, or micro-engines for power generation. Here we report on a strategy by which miniaturized metallic structures with 3D cavities can be fabricated. We show results for a particular form of the strategy in which fabrication of sub-millimetre cavities with radii of 150 μm is achieved in 316L stainless steel. Fabrication of the cavities is achieved by a method which uses micro-polymer insert moulding, micro-powder over-moulding, Catalytic Debinding and sintering. This work establishes for the first time the feasibility of micro-moulding based fabrication routes for the production of 3D internal geometries in miniaturized metallic structures.
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fabrication of ceramic micro scale hollow components by micro powder injection moulding
Journal of The European Ceramic Society, 2012Co-Authors: Usama M Attia, Jeffrey R AlcockAbstract:Rapid developments in microsystem technologies demand ceramic microcomponents of increasing geometrical complexity. State-of-the-art microfabrication routes of ceramics are either limited in geometrical complexity and/or high volume capabilities. This paper presents a process route by which ceramic microcomponents with relatively complex three-dimensional architectures could be realised by a high-volume technique. The proposed strategy, in which yttria-stabilised zirconia was implemented, combines the capabilities of insert-micromoulding, powder micro-overmoulding, Catalytic Debinding and sintering. The produced architectures demonstrate the capability of the technique to combine the high performance of ceramic materials with the dimensional accuracy and mass manufacturability of powder micromoulding.
Usama M Attia - One of the best experts on this subject based on the ideXlab platform.
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creating movable interfaces by micro powder injection moulding
Journal of Materials Processing Technology, 2014Co-Authors: Usama M Attia, M Hauata, I Walton, Daniele Annicchiarico, Jeffrey R AlcockAbstract:Abstract This paper presents a novel in situ technique to produce articulated components with high-precision, micro-scale movable interfaces by micro-powder injection moulding (μPIM). The presented process route is based on the use of micro-scale sacrificial layer between the movable subcomponents which is eliminated during the Debinding step, creating a dimensionally-controlled, micro-scale mobile interface. The fabrication technique combines the advantages of micro-powder overmoulding, Catalytic Debinding and sintering. The demonstrated example was a finger bone prosthesis joint consisting of two sub-components with an interface between components of 200 μm in size. The geometries of the sub-components were designed such that they are inseparable throughout the process whilst allowing them to move relative to each other after the Debinding stage. The components produced showed the feasibility of the process route to produce readily-assembled meso-, and potentially micro-, scale articulated systems.
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fabrication of hollow 3d micro scale metallic structures by micro powder injection moulding
Journal of Materials Processing Technology, 2012Co-Authors: Usama M Attia, Jeffrey R AlcockAbstract:Abstract Architectures of current micro-scale metallic structures are unable to meet some requirements of micro-component designers, particularly when a design calls for truly three-dimensional internal micro-geometries. Such complex geometries are particularly important for emerging microsystem applications such as high-performance microfluidics for analytical applications, or micro-engines for power generation. Here we report on a strategy by which miniaturized metallic structures with 3D cavities can be fabricated. We show results for a particular form of the strategy in which fabrication of sub-millimetre cavities with radii of 150 μm is achieved in 316L stainless steel. Fabrication of the cavities is achieved by a method which uses micro-polymer insert moulding, micro-powder over-moulding, Catalytic Debinding and sintering. This work establishes for the first time the feasibility of micro-moulding based fabrication routes for the production of 3D internal geometries in miniaturized metallic structures.
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fabrication of ceramic micro scale hollow components by micro powder injection moulding
Journal of The European Ceramic Society, 2012Co-Authors: Usama M Attia, Jeffrey R AlcockAbstract:Rapid developments in microsystem technologies demand ceramic microcomponents of increasing geometrical complexity. State-of-the-art microfabrication routes of ceramics are either limited in geometrical complexity and/or high volume capabilities. This paper presents a process route by which ceramic microcomponents with relatively complex three-dimensional architectures could be realised by a high-volume technique. The proposed strategy, in which yttria-stabilised zirconia was implemented, combines the capabilities of insert-micromoulding, powder micro-overmoulding, Catalytic Debinding and sintering. The produced architectures demonstrate the capability of the technique to combine the high performance of ceramic materials with the dimensional accuracy and mass manufacturability of powder micromoulding.
M Hauata - One of the best experts on this subject based on the ideXlab platform.
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creating movable interfaces by micro powder injection moulding
Journal of Materials Processing Technology, 2014Co-Authors: Usama M Attia, M Hauata, I Walton, Daniele Annicchiarico, Jeffrey R AlcockAbstract:Abstract This paper presents a novel in situ technique to produce articulated components with high-precision, micro-scale movable interfaces by micro-powder injection moulding (μPIM). The presented process route is based on the use of micro-scale sacrificial layer between the movable subcomponents which is eliminated during the Debinding step, creating a dimensionally-controlled, micro-scale mobile interface. The fabrication technique combines the advantages of micro-powder overmoulding, Catalytic Debinding and sintering. The demonstrated example was a finger bone prosthesis joint consisting of two sub-components with an interface between components of 200 μm in size. The geometries of the sub-components were designed such that they are inseparable throughout the process whilst allowing them to move relative to each other after the Debinding stage. The components produced showed the feasibility of the process route to produce readily-assembled meso-, and potentially micro-, scale articulated systems.
I Walton - One of the best experts on this subject based on the ideXlab platform.
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creating movable interfaces by micro powder injection moulding
Journal of Materials Processing Technology, 2014Co-Authors: Usama M Attia, M Hauata, I Walton, Daniele Annicchiarico, Jeffrey R AlcockAbstract:Abstract This paper presents a novel in situ technique to produce articulated components with high-precision, micro-scale movable interfaces by micro-powder injection moulding (μPIM). The presented process route is based on the use of micro-scale sacrificial layer between the movable subcomponents which is eliminated during the Debinding step, creating a dimensionally-controlled, micro-scale mobile interface. The fabrication technique combines the advantages of micro-powder overmoulding, Catalytic Debinding and sintering. The demonstrated example was a finger bone prosthesis joint consisting of two sub-components with an interface between components of 200 μm in size. The geometries of the sub-components were designed such that they are inseparable throughout the process whilst allowing them to move relative to each other after the Debinding stage. The components produced showed the feasibility of the process route to produce readily-assembled meso-, and potentially micro-, scale articulated systems.
Daniele Annicchiarico - One of the best experts on this subject based on the ideXlab platform.
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creating movable interfaces by micro powder injection moulding
Journal of Materials Processing Technology, 2014Co-Authors: Usama M Attia, M Hauata, I Walton, Daniele Annicchiarico, Jeffrey R AlcockAbstract:Abstract This paper presents a novel in situ technique to produce articulated components with high-precision, micro-scale movable interfaces by micro-powder injection moulding (μPIM). The presented process route is based on the use of micro-scale sacrificial layer between the movable subcomponents which is eliminated during the Debinding step, creating a dimensionally-controlled, micro-scale mobile interface. The fabrication technique combines the advantages of micro-powder overmoulding, Catalytic Debinding and sintering. The demonstrated example was a finger bone prosthesis joint consisting of two sub-components with an interface between components of 200 μm in size. The geometries of the sub-components were designed such that they are inseparable throughout the process whilst allowing them to move relative to each other after the Debinding stage. The components produced showed the feasibility of the process route to produce readily-assembled meso-, and potentially micro-, scale articulated systems.