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Marçalo, J.
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article
Preparation of dense 13C pellets using spark plasma sintering technique
Abstract
<p>Dense <sup>13</sup>C pellets were prepared using the spark plasma sintering (SPS) technique. <sup>13</sup>C material was used as starting powders with fibre-like shape and heterogeneous fibre diameters of few nanometres to few hundred nanometres. Graphite die and punches were used as a container, and the <sup>13</sup>C powder was isolated from both die and punches with pure flexible graphite papyex. Results show that densification starts at 1900°C when the pressure overpasses 60 MPa, and maximum effect has been obtained at the same temperature <80 MPa. The powders were densified to more than ∼90% of the theoretical density by the SPS process. Such <sup>13</sup>C pellets are of special interest to prepare actinide or lanthanide carbide intermetallics for spectroscopy studies.</p>