Thermal inkjet 3D powder printing of metals and alloys: Current status and challenges

Barui, Srimanta and Mandal, Sourav and Basu, Bikramjit (2017) Thermal inkjet 3D powder printing of metals and alloys: Current status and challenges. In: Current Opinion in Biomedical Engineering, 2 . pp. 116-123. ISSN 24684511

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Abstract

This article reviews the current status and contemporary challenges involved in 3D inkjet powder printing of metallic biomaterials. The process physics, comprising of drop-on-demand methodology and binder-powder interaction are briefly discussed. For the later, various dimensionless numbers (Re, Oh and We) are emphasized as they govern the morphology and travel of the binder droplet. The post-impact interaction with powder particles are described into three sequential stages as, impact driven, capillary driven and equilibrium attainment. A review of several binder formulations to 3D print metallic biomaterials is presented along with the guidelines. Non-destructive 3D structural analysis, using advanced X Ray micro-computed tomography (XCT) technique is emphasized for porous architecture assessment (pore volume fraction, pore shape and size distribution, % interconnectivity) and dimensional tolerance. Finally, the processing and post-processing related challenges in terms of the suitable models for real time powder-binder interaction study, limitations in depowdering, heat treatment strategy, surface roughness are emphasized.

Item Type:	Journal Article
Publication:	Current Opinion in Biomedical Engineering
Publisher:	Elsevier B.V.
Additional Information:	The copyright for this article belongs to the Elsevier B.V.
Keywords:	3D inkjet powder printing; Binder formulation; Drop on demand; Metallic biomaterial; Process physics; X Ray micro-computed tomography
Department/Centre:	Division of Chemical Sciences > Materials Research Centre Division of Interdisciplinary Sciences > Centre for Biosystems Science and Engineering
Date Deposited:	30 May 2022 04:43
Last Modified:	30 May 2022 04:43
URI:	https://eprints.iisc.ac.in/id/eprint/72824

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