Processing of nano-SiC ceramics: Densification by SPS and mechanical characterization

被引：84

作者：

Lomello, F. ^{[1
]}

Bonnefont, G. ^{[2
]}

Leconte, Y. ^{[1
]}

Herlin-Boime, N. ^{[1
]}

Fantozzi, G. ^{[2
]}

机构：

[1] CEA Saclay, DSM IRAMIS SPAM LFP, CEA CNRS URA 2453, F-91191 Gif Sur Yvette, France

[2] Univ Lyon, INSA Lyon, MATEIS UMR CNRS 5510, F-69621 Villeurbanne, France

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2012年 / 32卷 / 03期

关键词：

SiC; Spray-pyrolysis; Dispersion; Spark plasma sintering; Mechanical properties; Nuclear applications; LASER-DRIVEN REACTIONS; GRAIN-SIZE DEPENDENCE; STRUCTURAL APPLICATIONS; POWDERS; FRACTURE; TOUGHNESS; HARDNESS; DESIGN;

D O I：

10.1016/j.jeurceramsoc.2011.10.006

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

beta-Sic nanopowders with a mean particle size of 16.6 nm were obtained by laser pyrolysis. De-agglomeration of the powder was performed in an aqueous medium under magnetic stirring and ball-milling. Subsequently, green bodies were prepared by slip-casting of slurries. In this context, non-conventional densification routes such as Spark Plasma Sintering (SPS) with an applied pressure of 70 MPa allowed to achieve high final densities (96% TD). Different microstructures were obtained by varying the sintering temperature. Finally, the mechanical properties of the samples (hardness, toughness) were determined and a correlation between the final microstructures and the mechanical behavior was established. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：633 / 641

页数：9

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