The potential of rapid cooling spark plasma sintering for metallic materials

Zhang, Faming; Reich, Michael; Keßler, Olaf; Burkel, E.

doi:10.1016/j.mattod.2013.05.005

Cited by 61 publications

(18 citation statements)

References 22 publications

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“…The high-cooling rates can result in special microstructures or special non-equilibrium phase assembly. [205] Further examples of non-equilibrium composites are diamond or cubic boron nitride containing materials. The hard reinforcing phase secure good tribological properties as well as high hardness.…”

Section: Non-equilibrium Materialsmentioning

confidence: 99%

Field‐Assisted Sintering Technology/Spark Plasma Sintering: Mechanisms, Materials, and Technology Developments

et al. 2014

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Field-assisted sintering technology/Spark plasma sintering is a low voltage, direct current (DC) pulsed current activated, pressure-assisted sintering, and synthesis technique, which has been widely applied for materials processing in the recent years. After a description of its working principles and historical background, mechanical, thermal, electrical effects in FAST/SPS are presented along with the role of atmosphere. A selection of successful materials development including refractory materials, nanocrystalline functional ceramics, graded, and non-equilibrium materials is then discussed. Finally, technological aspects (advanced tool concepts, temperature measurement, finite element simulations) are covered.

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Section: Non-equilibrium Materialsmentioning

confidence: 99%

Field‐Assisted Sintering Technology/Spark Plasma Sintering: Mechanisms, Materials, and Technology Developments

et al. 2014

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“…A high DC pulse that is applied across a die generates heating power that is dissipated at the Assessment of Methods to Consolidate Iodine-Loaded Silver-Functionalized Silica Aerogel September 2013 11 contact points of powder particles. This homogeneous distribution of the heat at the microscopic scale results in heating rates as high as 1000 °C /min (Zhang et al 2013).…”

Section: Spark Plasma Sinteringmentioning

confidence: 99%

Assessment of Methods to Consolidate Iodine-Loaded Silver-Functionalized Silica Aerogel

Matyáš¹,

Engler²

2013

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SUMMARYThe U.S. Department of Energy is currently investigating alternative sorbents for the removal and immobilization of radioiodine from the gas streams in a nuclear fuel reprocessing plant. One of these new sorbents, Ag 0 -functionalized silica aerogels, shows promise as a potential replacement for Ag-bearing mordenites because of its high selectivity and sorption capacity for iodine. Moreover, a feasible consolidation of iodine-loaded Ag 0 -functionalized silica aerogels to a durable SiO 2 -based waste form makes this aerogel an attractive choice for sequestering radioiodine.This report provides a preliminary assessment of the methods that can be used to consolidate iodineloaded Ag 0 -functionalized silica aerogels into a final waste form. In particular, it focuses on experimental investigation of densification of as-prepared Ag 0 -functionalized silica aerogel powders, with or without an organic moiety and with or without a sintering additive (colloidal silica), with three commercially available techniques: 1) hot uniaxial pressing (HUP), 2) hot isostatic pressing (HIP), and 3) spark plasma sintering (SPS). Since there are no studies reported in literature on the sintering of aerogels with HIP and SPS, the preliminary experiments were performed without iodine-loaded aerogels and were focused on investigating feasibility of these methods to produce a fully dense product. Iodine was excluded from these initial studies to avoid potential damage to vendor equipment due to the potential release of iodine during consolidation. The densified products were evaluated with a helium gas pycnometer for apparent density, with the Archimedes method for apparent density and open porosity, and with high-resolution scanning electron microscopy and energy dispersive spectroscopy (SEM-EDS) for the extent of densification and distribution of individual elements.The preliminary investigation of HUP, HIP, and SPS showed that these sintering methods can be used to effectively consolidate powders of Ag 0 -functionalized silica aerogel into products of near-theoretical density. Also, removal of the organic moiety and adding 5.6 mass% of colloidal silica to Ag 0 -functionalized silica aerogel powders before processing resulted in denser products. Furthermore, the ram travel data for SPS indicated that rapid consolidation of powders with SPS can be performed at temperatures below 950 °C.

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“…chemical reaction with atmospheric gases like nitrogen, hydrogen and oxygen, especially at elevated temperatures [21,36,37]. So, the most popular sintering methods in PM are field assisted sintering techniques like SPS [38][39][40].…”

Section: Introductionmentioning

confidence: 99%

Effect of Sn addition on the microstructural characteristics and mechanical properties of the titanium alloy (Ti6Al4V)

Rajadurai¹,

Annamalai²

2018

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Ti-6Al-4V-xSn (x = 2, 4, and 6 wt.%) alloys were developed for the aerospace application through the near net shaped technique powder metallurgy route. Spark Plasma Sintering (SPS) was used to sinter the samples. The influence of Sn particles on the microstructural characteristics and mechanical properties of titanium alloy was examined through a novel technique called SPS. It has been found that Sn has a strong solid solution strengthening ability in the titanium alloy (Ti6Al4V). Moreover, the addition influences the microstructure and mechanical properties of titanium alloy. With increasing the percentage of Sn content, the density of the samples decreases, and the mechanical properties like yield stress (YS), ultimate tensile stress (UTS), the percentage of elongation and the hardness are greatly varying. From this investigation, it is found that YS, UTS, the percentage of elongation of the samples of Ti6Al4V-2Sn alloy exhibit better values than of Ti6Al4V-4Sn and Ti6Al4V-6Sn alloys, and the hardness of the samples is increasing with the addition of Sn from 2 to 6 %. K e y w o r d s : Ti-6Al-4V-xSn (x = 2, 4, and 6 wt.%), Spark Plasma Sintering (SPS), microstructure, mechanical properties

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The potential of rapid cooling spark plasma sintering for metallic materials

Cited by 61 publications

References 22 publications

Field‐Assisted Sintering Technology/Spark Plasma Sintering: Mechanisms, Materials, and Technology Developments

Field‐Assisted Sintering Technology/Spark Plasma Sintering: Mechanisms, Materials, and Technology Developments

Assessment of Methods to Consolidate Iodine-Loaded Silver-Functionalized Silica Aerogel

Effect of Sn addition on the microstructural characteristics and mechanical properties of the titanium alloy (Ti6Al4V)

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