Structural and mechanical characterization of porous iron aluminide FeAl obtained by pressureless Spark Plasma Sintering

Dudina, Dina V.; Леган, М. А.; Fedorova, N. V.; Novoselov, Aleksey N.; Анисимов, А. Н.; Esikov, Maksim A.

doi:10.1016/j.msea.2017.04.051

Cited by 16 publications

(9 citation statements)

References 22 publications

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“…Incomplete sintering is ensured when low pressures and/or low temperatures are used. Sintering can be conducted using pre-consolidated compacts [40] or powders freely poured into the die cavity [15,21,47,48,49,50,51]. In this section, we will discuss the development of inter-particle contacts during the formation of porous structures by SPS, sintering of hollow/porous particles and hollow spheres.…”

Section: Fabrication Of Porous Materials By Partial Densification mentioning

confidence: 99%

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Fabrication of Porous Materials by Spark Plasma Sintering: A Review

2019

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Spark plasma sintering (SPS), a sintering method that uses the action of pulsed direct current and pressure, has received a lot of attention due to its capability of exerting control over the microstructure of the sintered material and flexibility in terms of the heating rate and heating mode. Historically, SPS was developed in search of ways to preserve a fine-grained structure of the sintered material while eliminating porosity and reaching a high relative density. These goals have, therefore, been pursued in the majority of studies on the behavior of materials during SPS. Recently, the potential of SPS for the fabrication of porous materials has been recognized. This article is the first review to focus on the achievements in this area. The major approaches to the formation of porous materials by SPS are described: partial densification of powders (under low pressures, in pressureless sintering processes or at low temperatures), sintering of hollow particles/spheres, sintering of porous particles, and sintering with removable space holders or pore formers. In the case of conductive materials processed by SPS using the first approach, the formation of inter-particle contacts may be associated with local melting and non-conventional mechanisms of mass transfer. Studies of the morphology and microstructure of the inter-particle contacts as well as modeling of the processes occurring at the inter-particle contacts help gain insights into the physics of the initial stage of SPS. For pre-consolidated specimens, an SPS device can be used as a furnace to heat the materials at a high rate, which can also be beneficial for controlling the formation of porous structures. In sintering with space holders, SPS processing allows controlling the structure of the pore walls. In this article, using the literature data and our own research results, we have discussed the formation and structure of porous metals, intermetallics, ceramics, and carbon materials obtained by SPS.

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Section: Fabrication Of Porous Materials By Partial Densification mentioning

confidence: 99%

“…It was concluded that the passage of electric current through the sample is not responsible for the preservation of high open porosities. The transverse rupture strength of the FeAl-based compacts produced at 700–900 °C by pressureless SPS ranged between 53 and 72 MPa [50].…”

Section: Fabrication Of Porous Materials By Partial Densification mentioning

confidence: 99%

Fabrication of Porous Materials by Spark Plasma Sintering: A Review

2019

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“…The hollow powder negates the need for foaming agents or space holders that can contaminate/weaken the foam, and reduces the pore size, which provides a larger specific surface area and refines the microstructure/properties of the matrix walls. Dudina et al [33] also used 'pressureless SPS' at 800°C or 900°C for 3 min to produce high porosity ( > 40%) iron aluminide foams with rupture strength of 53-72 MPa, which could be developed for applications requiring high-temperature gas filters.…”

Section: Porous Systemsmentioning

confidence: 99%

Processing metal powders via field assisted sintering technology (FAST): A critical review

Weston

Thomas

Jackson

2019

Materials Science and Technology

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The current status of field assisted sintering technology (FAST) of structural metals from powder is critically reviewed. Recently, there have been significant increases in the uptake of FAST for metallic systems, composites and porous materials at the laboratory-scale. It is clear that FAST is tolerant of powder/particulate feedstock, allowing rapid production of materials, some of which would be challenging through conventional sintering techniques. Yet, the underlying mechanisms allowing this are not fully understood. Final specimen sizes tend to be small, which restricts rigorous mechanical assessment. This review demonstrates the clear benefits in transitioning laboratory-scale demonstrators to the industrial scale over the next few years. However, consideration will need to be given to size, throughput, and shape complexities to attract commercial investment.

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“…Most recently, pressureless spark plasma sintering has been realized as a promising method for special requirements [20][21][22]. For example, Dudina et al chose pressureless spark plasma sintering as the treatment method for reactive sintering of porous FeAl which reduces the time of high-temperature exposure thus short ending the sample shrinkage time [23]. By using this method, single-phase FeAl powders can be obtained at 800°C for the reason that electric current can be heated rapidly and uniformly distributed in the whole volume of the powder sample.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of Ti₂SnC under Optimized Experimental Parameters of Pressureless Spark Plasma Sintering Assisted by Al Addition

Wang

et al. 2018

Advances in Materials Science and Engineering

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As an effective and novel rapid sintering technology with the advantages of fast heating speed and short sintering time, SPS has been applied to the research and development of various materials. After sintering at 1325°C, Ti5Sn3and Sn occurred as impurities accompanying the synthesis of Ti2SnC with a raw powder mixture of Ti/Sn/C = 2/1/1 (molar ratio). But by addition of 0.2 molar Al, and further optimization of sintering parameters at 1400°C for 10 min, almost fully pure Ti2SnC was obtained with a clear layered microstructure. The reaction mechanism analysis suggests that this beneficial effect of Al could be attributed to the suppression of decomposition of Ti2SnC by formation of Ti2SnxAl1−xC solid solution at a high sintering temperature. The present study reports a novel route to synthesize Ti2SnC by PL-SPS with a self-designed graphite die, and Al was also proposed as a sintering aid to remove impurities.

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Structural and mechanical characterization of porous iron aluminide FeAl obtained by pressureless Spark Plasma Sintering

Cited by 16 publications

References 22 publications

Fabrication of Porous Materials by Spark Plasma Sintering: A Review

Fabrication of Porous Materials by Spark Plasma Sintering: A Review

Processing metal powders via field assisted sintering technology (FAST): A critical review

Synthesis of Ti₂SnC under Optimized Experimental Parameters of Pressureless Spark Plasma Sintering Assisted by Al Addition

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Structural and mechanical characterization of porous iron aluminide FeAl obtained by pressureless Spark Plasma Sintering

Cited by 16 publications

References 22 publications

Fabrication of Porous Materials by Spark Plasma Sintering: A Review

Fabrication of Porous Materials by Spark Plasma Sintering: A Review

Processing metal powders via field assisted sintering technology (FAST): A critical review

Synthesis of Ti2SnC under Optimized Experimental Parameters of Pressureless Spark Plasma Sintering Assisted by Al Addition

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Synthesis of Ti₂SnC under Optimized Experimental Parameters of Pressureless Spark Plasma Sintering Assisted by Al Addition