Plasma in spark plasma sintering of ceramic particle compacts

SCRIPTA MATERIALIA

卷:82

Article

Marder, R.¹  Estournes, C.^2,3  Chevallier, G.^2,3  Chaim, R.¹ 

[1] Technion Israel Inst Technol, Dept Mat Sci & Engn, IL-32000 Haifa, Israel

[2] Univ Toulouse, UPS, INP, Inst Carnot Cirimat, F-31062 Toulouse 9, France

[3] CNRS, Inst Carnot Cirimat, F-31062 Toulouse, France

关键词: Spark plasma sintering;    Powder consolidation;    Ceramics;    Densification;    Plasma;   

DOI  :  10.1016/j.scriptamat.2014.03.023

来源: Elsevier

【 摘 要 】

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.

【 授权许可】

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