Logistic Regression and Response Surface Design for Statistical Modeling of Investment Casting Process in Metal Foam Production

Anglani, A.; Pacella, Massimo

doi:10.1016/j.procir.2017.12.252

Cited by 14 publications

(9 citation statements)

References 10 publications

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“…In view of the large variety of available geometries, many different additive manufacturing techniques have been successfully tested for 3D printing metallic structures (Zhang et al, 2018), such as selective electron beam melting (SEBM) (Körner, 2016), selective laser melting (SLM), investment casting (Anglani and Pacella, 2018), binder jetting, robocasting (Danaci et al, 2016;Danaci et al, 2018), and combined 3D printingreplica.…”

Section: Additive Manufacturing Of Geometric Supportsmentioning

confidence: 99%

“…Investment casting is an alternative manufacturing approach to overcome such technological limits. In literature, 3D structures with struts diameters ranging from 0.4 to 1 mm were effectively produced, with porosities up to 93% (Anglani and Pacella, 2018). Due to the use of molten metals, investment casting allows decreasing the residual roughness of printed object, which is usually in the same range of metal particle size for powder-based techniques.…”

Section: Additive Manufacturing Of Geometric Supportsmentioning

confidence: 99%

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Recent Advances in the Development of Highly Conductive Structured Supports for the Intensification of Non-adiabatic Gas-Solid Catalytic Processes: The Methane Steam Reforming Case Study

et al. 2022

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Structured catalysts are strong candidates for the intensification of non-adiabatic gas-solid catalytic processes thanks to their superior heat and mass transfer properties combined with low pressure drops. In the past two decades, different types of substrates have been proposed, including honeycomb monoliths, open-cell foams and, more recently, periodic open cellular structures produced by additive manufacturing methods. Among others, thermally conductive metallic cellular substrates have been extensively tested in heat-transfer limited exo- or endo-thermic processes in tubular reactors, demonstrating significant potential for process intensification. The catalytic activation of these geometries is critical: on one hand, these structures can be washcoated with a thin layer of catalytic active phase, but the resulting catalyst inventory is limited. More recently, an alternative approach has been proposed, which relies on packing the cavities of the metallic matrix with catalyst pellets. In this paper, an up-to-date overview of the aforementioned topics will be provided. After a brief introduction concerning the concept of structured catalysts based on highly conductive supports, specific attention will be devoted to the most recent advances in their manufacturing and in their catalytic activation. Finally, the application to the methane steam reforming process will be presented as a relevant case study of process intensification. The results from a comparison of three different reactor layouts (i.e. conventional packed bed, washcoated copper foams and packed copper foams) will highlight the benefits for the overall reformer performance resulting from the adoption of highly conductive structured internals.

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Section: Additive Manufacturing Of Geometric Supportsmentioning

confidence: 99%

Section: Additive Manufacturing Of Geometric Supportsmentioning

confidence: 99%

Recent Advances in the Development of Highly Conductive Structured Supports for the Intensification of Non-adiabatic Gas-Solid Catalytic Processes: The Methane Steam Reforming Case Study

et al. 2022

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show abstract

“…As an alternative, the manufacturing by conventional investment casting was proposed to overcome some of these limitations, and structures with porosities up to 93% and struts with diameter in the range 0.4 to 1 mm were reported in literature. 13 Moreover, the problem of residual roughness in the range of the dimension of the starting powder, which is a common problem for several other techniques, is prevented thanks to the use of molten metals. Nevertheless, constraints and limitations are still present, both in terms of maximum object dimensions and minimum strut size.…”

Section: Introductionmentioning

confidence: 99%

“…Different techniques are available to 3D print metallic structures, 9 such as robocasting, 10,11 selective electron beam melting (SEBM), 12 selective laser melting (SLM), binder jetting, investment casting 13 and combined 3D printing‐replica techniques.…”

Section: Introductionmentioning

confidence: 99%

“…The use of the techniques introduced so far still represents a challenge for the production of three‐dimensional catalytic supports, as the demand for structures with high specific surface area calls for a resolution that is currently the limiting parameter both in terms of dimensional accuracy and small geometries, together with costs and maximum printable size. As an alternative, the manufacturing by conventional investment casting was proposed to overcome some of these limitations, and structures with porosities up to 93% and struts with diameter in the range 0.4 to 1 mm were reported in literature 13 . Moreover, the problem of residual roughness in the range of the dimension of the starting powder, which is a common problem for several other techniques, is prevented thanks to the use of molten metals.…”

Section: Introductionmentioning

confidence: 99%

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