Pressureless Spark Plasma Sintering: A Perspective from Conventional Sintering to Accelerated Sintering Without Pressure

Yamanoğlu, Rıdvan

doi:10.1007/s11106-019-00010-1

Cited by 25 publications

(14 citation statements)

References 47 publications

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“…Such a scheme of sintering was used before by some other researchers. The detailed review on this sintering technique was recently published by Yamanoglu [ 49 ]. The main application of pressureless sintering deals with the synthesis of porous materials.…”

Section: Discussionmentioning

confidence: 99%

Field-Assisted Sintering/Spark Plasma Sintering of Gadolinium-Doped Ceria with Controlled Re-Oxidation for Crack Prevention

et al. 2020

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Gadolinium-Doped Ceria (GDC) is a prospective material for application in electrochemical devices. Free sintering in air of GDC powder usually requires temperatures in the range of 1400 to 1600 °C and dwell time of several hours. Recently, it was demonstrated that sintering temperature can be significantly decreased, when sintering was performed in reducing atmosphere. Following re-oxidation at elevated temperatures was found to be a helpful measure to avoid sample failure. Sintering temperature and dwell time can be also decreased by use of Spark Plasma Sintering, also known as Field-Assisted Sintering Technique (FAST/SPS). In the present work, we combined for the first time the advantages of FAST/SPS technology and re-oxidation for sintering of GDC parts. However, GDC samples sintered by FAST/SPS were highly sensitive to fragmentation. Therefore, we investigated the factors responsible for this effect. Based on understanding of these factors, a special tool was designed enabling pressureless FAST/SPS sintering in controlled atmosphere. For proof of concept, a commercial GDC powder was sintered in this tool in reducing atmosphere (Ar-2.9%H2), followed by re-oxidation. The fragmentation of GDC samples was avoided and the number of micro-cracks was reduced to a minimum. Prospects of GDC sintering by FAST/SPS were discussed.

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Section: Discussionmentioning

confidence: 99%

Field-Assisted Sintering/Spark Plasma Sintering of Gadolinium-Doped Ceria with Controlled Re-Oxidation for Crack Prevention

et al. 2020

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“…On the other hand, spherical particles give lower density than complex-shaped particles due to the large spaces between the particles. 11 However, this negative effect was not reflected negatively on the density value due to pressure-assisted sintering. In different studies, it has been reported that higher density is obtained for Ti6Al4V alloy with the hot press method compared to traditional sintering methods.…”

Section: Resultsmentioning

confidence: 99%

Support recycling in additive manufacturing: A case study for enhanced wear performance of Ti6Al4V alloy

Yamanoğlu

Bahador

Kondoh

2023

Proceedings of the Institution of Mechanical Engineers, Part J:

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The production of metals by additive manufacturing is developing rapidly. After production, support structures emerge as waste materials. In this study, Ti6Al4V support structures recycled from the selective laser melting process were consolidated by vacuum hot pressing. Spherical and irregularly shaped Ti6Al4V alloy particles were also used for the comparison as raw materials. All raw materials have been subjected to the same sintering process by hot pressing. The microstructures of the samples were carried out, and their dry sliding wear performance was studied. The samples produced from support structures showed the highest wear performance compared to the powder forms of raw materials. This study showed that the support structures from additive manufacturing could be recycled and transformed into full dense structures by pressure-assisted sintering techniques, and enhanced wear performance can be obtained.

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“…The fabrication sequence consists of pouring the metallic powders/particles into a mould, pressing and sintering them below the melting point of the metallic material, as shown in figure 8(a) [65,66]. To adjust the porosity, the compaction pressure, reduction ratio and the sintering temperature parameters can be considered [67]. Oh et al [68] systemically studied the effect of particle size on the porosity of Titanium material.…”

Section: Loose Powder Sinteringmentioning

confidence: 99%

The development of porous metallic materials: a short review of fabrication, characteristics, and applications

Li-Yin,

Hao-Kun,

Xuan

et al. 2023

Phys. Scr.

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Metallic porous material plays an irreplaceable role in weight reduction, heat dissipation, catalyst, and other industrial applications. The customized, large production and environment-friendly fabrication of porous metallic material are becoming increasingly important. Moreover, the selection of matrix material, control of porosity, and foaming parameters are critical for determining the quality of porous metallic material and product. As the porous metallic material is often used as the structural and/or functional component, its mechanical, heat dissipation, corrosion resistance and other properties need to be evaluated before industrial application. This review provides an overview of the fabrication techniques, characteristics, and applications of porous metallic materials. Additionally, current industrial applications and potential future areas are discussed.

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Pressureless Spark Plasma Sintering: A Perspective from Conventional Sintering to Accelerated Sintering Without Pressure

Cited by 25 publications

References 47 publications

Field-Assisted Sintering/Spark Plasma Sintering of Gadolinium-Doped Ceria with Controlled Re-Oxidation for Crack Prevention

Field-Assisted Sintering/Spark Plasma Sintering of Gadolinium-Doped Ceria with Controlled Re-Oxidation for Crack Prevention

Support recycling in additive manufacturing: A case study for enhanced wear performance of Ti6Al4V alloy

The development of porous metallic materials: a short review of fabrication, characteristics, and applications

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