Fundamental investigations on the spark plasma sintering/synthesis process

Chen, W.; Anselmi‐Tamburini, Umberto; Garay, Javier E.; Groza, Joanna R.; Munir, Zuhair A.

doi:10.1016/j.msea.2004.11.020

Cited by 289 publications

(146 citation statements)

References 19 publications

Supporting

Mentioning

138

Contrasting

Unclassified

Order By: Relevance

“…Graphite punches generate pressures (up to ∼100 MPa) and also serve as electrodes providing a pulsing direct current (up to 10 V and 10 kA) through the powder and dies. 5,6 Apart from the ongoing scientific discussion concerning the actual mechanisms (presence 7 or absence 8 of plasma during processing by SPS) and the actual effect of the electric field and current, it presents a very efficient technique for powder consolidation compared to classical sintering of green pellets.…”

Section: Introductionmentioning

confidence: 99%

Implementation of a spark plasma sintering facility in a hermetic glovebox for compaction of toxic, radiotoxic, and air sensitive materials

Tyrpekl

Berkmann

Holzhäuser

et al. 2015

Review of Scientific Instruments

View full text Add to dashboard Cite

Spark plasma sintering (SPS) is a rapidly developing method for densification of powders into compacts. It belongs to the so-called “field assisted sintering techniques” that enable rapid sintering at much lower temperatures than the classical approaches of pressureless sintering of green pellets or hot isostatic pressing. In this paper, we report the successful integration of a SPS device into a hermetic glovebox for the handling of highly radioactive material containing radioisotopes of U, Th, Pu, Np, and Am. The glovebox implantation has been facilitated by the replacement of the hydraulic system to apply pressure with a compact electromechanical unit. The facility has been successfully tested using UO2 powder. Pellets with 97% of the theoretical density were obtained at 1000 °C for 5 min, significantly lower than the ∼1600 °C for 5-10 h used in conventional pellet sintering.

show abstract

Section: Introductionmentioning

confidence: 99%

Implementation of a spark plasma sintering facility in a hermetic glovebox for compaction of toxic, radiotoxic, and air sensitive materials

Tyrpekl

Berkmann

Holzhäuser

et al. 2015

Review of Scientific Instruments

View full text Add to dashboard Cite

show abstract

“…9 The grain growth can be moderated by optimizing the compaction parameters (temperature, pressure, and the duration of sintering), e.g., in spark plasma sintering (SPS), where the consolidation is assisted by electric current pulses. [10][11][12] The physics of the consolidation process during SPS processing is not fully understood, but its main characteristic is an ultrafast compaction at much lower temperatures than in the classic techniques, thus reducing grain growth. 13 The study of the correlation between microstructure and mechanical behavior of bulk UFG samples produced by different powder metallurgy procedures is of great importance for practical applications.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical behavior of ultrafine-grained Ni processed by different powder metallurgy methods

Gubicza

Bui²,

Fellah³

et al. 2009

J. Mater. Res.

View full text Add to dashboard Cite

Ultrafine-grained samples were produced from a Ni nanopowder by hot isostatic pressing (HIP) and spark plasma sintering (SPS). The microstructure and mechanical behavior of the two specimens were compared. The grain coarsening observed during the SPS procedure was moderated due to a reduced temperature and time of consolidation compared with HIP processing. The smaller grain-size and higher nickel-oxide content in the SPS-processed sample resulted in a higher yield strength. Compression experiments showed that the specimen produced by SPS reached a maximal flow stress at a small strain, which was followed by a long steady-state softening while the HIP-processed sample hardened until failure. It was revealed that the softening of the SPS-processed sample resulted from microcracking along the grain boundaries.

show abstract

“…Also shown in the figure are the behaviours of the parameters which are important in the process management, particularly those of the pressure and temperature. More detailed descriptions of this method and its applications are dealt with in adequate publications and references such as [8][9][10].…”

Section: Methodsmentioning

confidence: 99%

Applying “Spark Plasma Sintering” Technology to Enhance the Resistance to Contact Fatigue of Sintered Steel Based on Astaloy CRL

Rodziňák

Čerňan

Puchý

2017

Powder Metallurgy Progress

View full text Add to dashboard Cite

INTRODUCTIONOur previous works [1-3] have already monitored the contact fatigue of sintered steels based on material type Astaloy CrL produced by Höganäs. They were investigating sintered materials with a density of about 7000 kg.m -3 using heat and chemical-heat treatment and based on known methods of enhancing the basic properties of sintered materials, of course. At a later stage we used such kinds of technologies which affected only the surface layers critical in terms of contact fatigue destruction. Here, for example, belongs the technology of laser hardening, or methods of applying hard thin coatings such as TiCN type or DLC type respectively to the surface layers [4][5][6]. In all the cases they did improve resistance to contact fatigue destruction. It is a matter of course that similar results have also been achieved by other authors whom we have not forgotten to cite in our articles. In all instances the use of sintered materials was bound to the density of 7000 kg.m -3 , and it is well known that the porosity of such materials drastically reduces their mechanical properties.

show abstract

Fundamental investigations on the spark plasma sintering/synthesis process

Cited by 289 publications

References 19 publications

Implementation of a spark plasma sintering facility in a hermetic glovebox for compaction of toxic, radiotoxic, and air sensitive materials

Implementation of a spark plasma sintering facility in a hermetic glovebox for compaction of toxic, radiotoxic, and air sensitive materials

Microstructure and mechanical behavior of ultrafine-grained Ni processed by different powder metallurgy methods

Applying “Spark Plasma Sintering” Technology to Enhance the Resistance to Contact Fatigue of Sintered Steel Based on Astaloy CRL

Contact Info

Product

Resources

About