Current challenges and potential directions towards precision microscale additive manufacturing – Part II: Laser-based curing, heating, and trapping processes

Behera, Dipankar; Chizari, Samira; Shaw, Lucas A.; Porter, Michael; Hensleigh, Ryan; Xu, Zhenpeng; Roy, Nilabh K.; Connolly, Liam G.; Zheng, Xiaoyu; Saha, Sourabh K.; Hopkins, Jonathan B.; Cullinan, Michael

doi:10.1016/j.precisioneng.2020.12.012

Cited by 25 publications

(10 citation statements)

References 137 publications

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“…Although micro- and nanoscale AM is a relatively new field of application, macro-scale technologies are still of use to fabricate complex parts at these smaller scales. Many researchers, such as Vaezi et al, Paul et al, Behera et al, and Chizari et al [ 26 , 27 , 28 , 29 , 30 ] proposed different classification categories for the application of these technologies at such scales, based on the production equipment used, the materials, the dimensions and the required tolerances of critical features, as well as other product attributes (i.e., intended use, texture, color, and strength). The most popular classification takes into consideration well-established macro-AM technologies, including 2D ink printing and other technologies fitted to the micro- and nanoscales.…”

Section: Technologies and Materials For Am At The Microscalementioning

confidence: 99%

Design Aspects of Additive Manufacturing at Microscale: A Review

et al. 2022

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Additive manufacturing (AM) technology has been researched and developed for almost three decades. Microscale AM is one of the fastest-growing fields of research within the AM area. Considerable progress has been made in the development and commercialization of new and innovative microscale AM processes, as well as several practical applications in a variety of fields. However, there are still significant challenges that exist in terms of design, available materials, processes, and the ability to fabricate true three-dimensional structures and systems at a microscale. For instance, microscale AM fabrication technologies are associated with certain limitations and constraints due to the scale aspect, which may require the establishment and use of specialized design methodologies in order to overcome them. The aim of this paper is to review the main processes, materials, and applications of the current microscale AM technology, to present future research needs for this technology, and to discuss the need for the introduction of a design methodology. Thus, one of the primary concerns of the current paper is to present the design aspects describing the comparative advantages and AM limitations at the microscale, as well as the selection of processes and materials.

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Section: Technologies and Materials For Am At The Microscalementioning

confidence: 99%

Design Aspects of Additive Manufacturing at Microscale: A Review

et al. 2022

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“…Over the past decade, intensive research efforts have been focused on improving printing resolution, [300,301] accelerating printing rate, [302,303] and enabling the precise structural control across multiple length scales. [304][305][306][307] However, the ability to prepare polymer composites with aligned fillers is much less developed. [308] Therefore, significant opportunities exist for combining some of these established methods in AM through leveraging different external forces and fields, ultimately toward creating anisotropic and performanceenhanced polymer composites with versatile control over material shape, size, and functionality.…”

Section: Concluding Remarks and Future Perspectivesmentioning

confidence: 99%

Scalable methods for directional assembly of fillers in polymer composites: Creating pathways for improving material properties

Griffin

Guo

et al. 2022

Polymer Composites

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Polymer composites are ubiquitous and indispensable in numerous applications. Coupling the inclusion of reinforcing agents with methods developed to control filler distribution and orientation allow for significant enhancement in mechanical, thermal, electrical, and barrier/transport‐related properties of composites. For practical implementation, ideal approaches to fabricating polymer composites with directionally assembled fillers must consider manufacturing compatibility, scale‐up ease, and aligning efficiency. In this article, we will review a cost‐effective and industrially relevant toolbox for preferential filler alignment in polymer composites. Three main strategies for aligning fillers within polymer composites will be discussed. Specifically, solution casting and compression molding can introduce compression force to assemble fillers along the in‐plane direction of composite films, shear force can be developed during fiber spinning, film blowing, and uniaxial/biaxial stretching processes to align fillers along the shear direction, and external fields (both electric and magnetic fields) can direct assembly of fillers, typically along the out‐of‐plane direction. For each section, we not only highlight the mechanisms of these methods but also demonstrate the critical structure–property relationships through model examples. Finally, a perspective on future opportunities and challenges of anisotropic and performance‐enhanced polymer composite preparation strategies is provided, with a particular focus on additive manufacturing.

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“…Such enclosed channels are generally fused shut during the production process. In contrast, small, “positive” features can be produced accurately using SLA ( 31 ). To investigate these limitations, the design and printing of the trocars was carried out in two stages.…”

Section: Introductionmentioning

confidence: 99%