Impact of oxygen content in powders on the morphology of the laser molten tracks in preparation for additive manufacturing of silicon

Dantec, Marie Le; Güniat, Lucas; Leistner, Matthias; Figi, Renato; Bleiner, Davide; Leparoux, Marc; Hoffmann, P.

doi:10.1016/j.powtec.2019.11.052

Cited by 9 publications

(1 citation statement)

References 25 publications

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“…Yttrium aluminum garnet (Y3Al5O12, YAG) is one of the most developed materials as laser host and phosphor due to its optical properties and its uniqueness when doped with another materials. YAG also has variety of other application because of its high thermal stability, high strength, and high corrosion and chemical resistance [1]- [4]. The formation of YAG phase require such a high temperature at 1600 o C which is costly and will result in the microstructure coarsening adversely affect its properties [5].…”

Section: Introductionmentioning

confidence: 99%

Influence of Mechanical Activation on the Formation of Yttrium Aluminum Garnet (YAG) at Lower Temperature

Dioktyanto

Noviyanto²,

Yuwono

2022

SSP

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Yttrium aluminum garnet (YAG) is an important material which require high temperature of 1600°C in its solid-state reaction. To lower this temperature, mechanical activation process has applied to the system which make the crystal arrangement broken thus make it more reactive. This process results in homogeneous and fine particle distribution of Al2O3 and Y2O3 compared to manually mixed powders. Moreover, milling process also reduce the particle size of the Al2O3 and Y2O3 from 4694 nm and 349 nm down to 274 nm. This also lessen the crystallite size of Al2O3 and Y2O3 from 1010 and 164 Å to 310 and 50 Å respectively. Then, after calcination at 1100°C, the milled powders form YAG phase in the opposite of manually mixed powders which form YAM phase. YAG formed have nearly round shape with finer grain compared to manually mixed powders which still has large grain of Al2O3 and Y2O3. This formation temperature is much lower than the require conventional solid-state reaction.

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Section: Introductionmentioning

confidence: 99%

Influence of Mechanical Activation on the Formation of Yttrium Aluminum Garnet (YAG) at Lower Temperature

Dioktyanto

Noviyanto²,

Yuwono

2022

SSP

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A state of the art on surface morphology of selective laser-melted metallic alloys

Kuntoğlu

Salur

Canlı

et al. 2023

Int J Adv Manuf Technol

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The possibility of producing complex metallic parts in various industries can be attributed to the selective laser melting (SLM) additive manufacturing method. As a powder bed fusion technique, SLM fabricates the product layer by layer. The state-of-the-art research on SLM, the metallic alloys utilized in the process, and the surface morphology of fabricated parts are discussed in this paper. The present report contributes to the literature by providing a comprehensive overview of the surface morphology of metallic alloys fabricated using the SLM additive manufacturing method. The article covers recent research on SLM, metallic alloys used in the process, and the surface morphology of fabricated parts. Insights into the challenges and opportunities of SLM for the fabrication of metallic parts with desired surface properties are provided. In the first part, parameters representing surface morphology are introduced and types of surface defects are viewed. Subsequently, influence of process variables during the production phase is discussed in-depth, overviewing several parameters such as laser, scanning, and geometric parameters. Surface morphology enhancement, namely in situ treatment, post-processing, and finishing-machining techniques, is viewed separately by classifying them into subtopics, in respect of their improvement effectiveness. Mechanical aspects of the microstructure and surface are evaluated in correlation with the surface morphology. The discussion of the findings considering the advantages and disadvantages of this technology is summarized finally. It is concluded that laser parameter effect’s significance depends on the work alloy. In the literature, process parameters are systematically studied, and better surface quality and favourable surface morphology of as build surfaces are possible. Moreover, it has been concluded that the surface morphology and quality of SLMed products can be improved with in situ techniques and post-treatments. Relieving residual stresses and decreasing porosity on the surface (various types of holes, pinholes, vacancies, etc.) during SLM operation are possible by base plate heating, powder preheating, and re-scanning. It is also noticed that the machinability studies of SLMed parts mainly focus on mechanical machining such as grinding and milling. Studies on the correlation between surface morphology of SLMed parts and mechanical properties are relatively scarce comparing to works on SLM production parameters. Finally, as an emerging technology for vast production of industrial items, it is concluded that surface morphology of SLMed products needs systematic correlation studies between process parameters and surface results.

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Rapid synthesis of Y3Al5O12 powders via plasma electrolysis

Zhang

Xiang

et al. 2021

Ceramics International

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Impact of oxygen content in powders on the morphology of the laser molten tracks in preparation for additive manufacturing of silicon

Cited by 9 publications

References 25 publications

Influence of Mechanical Activation on the Formation of Yttrium Aluminum Garnet (YAG) at Lower Temperature

Influence of Mechanical Activation on the Formation of Yttrium Aluminum Garnet (YAG) at Lower Temperature

A state of the art on surface morphology of selective laser-melted metallic alloys

Rapid synthesis of Y3Al5O12 powders via plasma electrolysis

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