Polishing of a selective electron beam melting processed tungsten carbide punch through high velocity impinging of flexible media

Kuppuswamy, Ramesh; Titus, Matthew; Jongh, Quintin de

doi:10.1007/s40430-022-03543-6

Cited by 2 publications

(2 citation statements)

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“…Co was used to initiate liquid phase sintering by melting the Co using the electron beam which then initiated grain growth of the WC. [26,31,32] Using a metal alloy as a matrix for ceramics and metal carbides can improve the prerequisites for melting these materials with EB-PBF which has been previously shown, [13][14][15]25,26,31,32] but according to Table 1 metal carbides should be possible to print without any sintering aid, which has been the focus of this study.…”

Section: Introductionmentioning

confidence: 96%

“…As there has been very little work published regarding printing or even melting metal ceramics and metal carbides using EB-PBF, this study will be of great value as it will be one of the first published works regarding melting refractory ceramic materials using EB-PBF. [13,14,25,26,[31][32][33] This study presents an investigation of the feasibility of melting NbC using EB-PBF by identifying a process window and investigating how the different process parameters affect the melt characteristics, as well as identifying potential issues regarding printing this type of material.…”

Section: Introductionmentioning

confidence: 99%

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Feasibility of Melting NbC Using Electron Beam Powder Bed Fusion

Wennersten,

Xu,

Armakavicius

et al. 2024

Adv Eng Mater

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High melting point materials such as ceramics and metal carbides are in general difficult to manufacture due to their physical properties, which imposes the need for new manufacturing methods where electron beam powder bed fusion (EB‐PBF) seems promising. Most materials that have been successfully printed with EB‐PBF are metals and metal alloys with good electrical conductivity, whereas dielectric materials such as ceramics are generally difficult to print. Catastrophic problems such as smoking and spattering can occur during the EB‐PBF processing owing to inappropriate physical properties such as lack of electrical, and thermal conductivity and high melting point, which are challenging to overcome by process optimization. Due to these difficulties, a limited level of understanding has been achieved regarding melting ceramics and refractory alloys. In this work, three different substrates of niobium carbide (NbC) were melted using EB‐PBF. The established process parameter window showed a good correlation between EB‐PBF process parameters, surface and melt characteristics, which could be used as a baseline for a printing process. Melting NbC was proven feasible using EB‐PBF, the work also pointed out challenges related to arc trips and spattering, as well as future investigations necessary to create a stable printing process.This article is protected by copyright. All rights reserved.

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