Sintering activation by external electrical field

Groza, Joanna R.; Zavaliangos, Antonios

doi:10.1016/s0921-5093(00)00771-1

Cited by 398 publications

(207 citation statements)

References 14 publications

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“…Therefore, there is no conclusive evidence for the effect of a plasma generation in SPS. The occurrence of a plasma discharge is still debated, but it seems to be widely accepted that occasional electric discharges may take place on a microscopic level [Groza et al, 2000]. …”

Section: Plasma Generationmentioning

confidence: 99%

Challenges and Opportunities for Spark Plasma Sintering: A Key Technology for a New Generation of Materials

Suárez¹,

Fernández²,

Menéndez³

et al. 2013

Sintering Applications

199

139

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Section: Plasma Generationmentioning

confidence: 99%

Challenges and Opportunities for Spark Plasma Sintering: A Key Technology for a New Generation of Materials

Suárez¹,

Fernández²,

Menéndez³

et al. 2013

Sintering Applications

199

139

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“…They employ an electric field as a facilitator of such processes and are generally referred to as "Field Assisted Sintering Techniques" (FAST). [1][2][3][4] The so-called "Spark Plasma Sintering" (SPS) method is a FAST technique. The general principle of SPS is shown in Figure 1.…”

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

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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.

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“…The most conventional heating method for hot-pressing is high-temperature resistance; however, other options are available, such as inductive hot-pressing where the heating of the powder is done by means of the surrounding graphite mold as susceptor [8]. Through the years, numerous processes that apply an external current to assist in powder consolidation have been developed, and these processes are well described [10] and reviewed elsewhere [11]. In field-assisted sintering techniques (FAST), the main differences compared with conventional hot-pressing [12] include higher heating rates, a current passing through the metallic powder, higher cooling rates and a greater applied mechanical pressure.…”

Section: Introductionmentioning

confidence: 99%