Ultrahigh pressure SPS (HP-SPS) as new syntheses and exploration tool in materials science

Mythili Prakasam (1) , Félix Balima (1) , Sławomir Cygan (2) , Piotr Klimczyk (2) , Lucyna Jaworska (2) , Alain Largeteau (1)

1 ICMCB - Institut de Chimie de la Matière Condensée de Bordeaux
2 Centre for Materials Research and Sintering Technology

Ultrahigh pressure SPS processing is demonstrated with high pressure (HP) Belt and high pressure Bridgman type toroidal apparatuses. These HP apparatuses are capable of working in temperature range 20–1800°C and the pressure ranges of 800 MPa–6 GPa (HP-SPS-Belt) and 4–8 GPa (HP-SPS-Bridgman) coupled, respectively, with pulse electric direct current. The designed equipment can be employed for various applications in materials processing to fine tune materials properties through microstructure engineering by employing high pressure and pulse electric current. We have demonstrated the benefits of HP-SPS-Belt and HP-SPS-Bridgman in comparison to conventional SPS to obtain dense sintered compact with β-SiC as a demonstrative material at comparatively low temperatures (1300°C), duration (3 min), and pressure (4 GPa). The initial nanosized grains are retained in the sintered compact. The developed innovation has huge potentials for various applications for materials processing, consolidation, and assembling in Materials Science.

Mots clés: High pressure; Pulse electric current; HP-SPS; Belt; Toroid

Domaines: Matériaux

Mythili Prakasam, Félix Balima, Sławomir Cygan, Piotr Klimczyk, Lucyna Jaworska, et al.. Ultrahigh pressure SPS (HP-SPS) as new syntheses and exploration tool in materials science. Giacomo Cao; Claude Estournès; Javier Garay; Roberto Orrù. Spark plasma sintering : current status, new developments and challenges, Elsevier, pp.201-218, 2019, 978-0-12-817744-0. ⟨10.1016/B978-0-12-817744-0.00009-X⟩. ⟨hal-02170138⟩