Journal
SCRIPTA MATERIALIA
Volume 82, Issue -, Pages 57-60Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2014.03.023
Keywords
Spark plasma sintering; Powder consolidation; Ceramics; Densification; Plasma
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Funding
- Israel Ministry of Science and Technology through the Women-in-Science fellowship
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Cuboidal LiF microcrystal powder was densified by spark plasma sintering at different pressures up to 500 degrees C. Densification at pressures above the yield stress occurred by plastic deformation and strain hardening. Densification at 2 MPa, below the yield stress, occurred by particle rearrangement assisted by viscous flow at the particle surfaces. Scanning electron microscopy examination of the fracture surfaces of the partially dense specimens revealed partial melting of the particle surfaces due to the plasma. The onset temperature for plasma formation was similar to 180 degrees C. (C) 2014 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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