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HomeKey Engineering MaterialsKey Engineering Materials Vols. 280-283Synthesis and Properties of Al2O3 Nanocomposite...

Synthesis and Properties of Al₂O₃ Nanocomposite Ceramics Toughened by Nano Metallic Particles

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Abstract:

Al2O3/Ni composite ceramics toughened by metallic particles was fabricated by the vacuum reduction of Al2O3 and nickel nitrate (Ni(NO3)2•6H2O) mixed powders at 800-1000° for 2-4h and hot pressed at 1400° ~ 1500°C for 1-2h. Three-point bending strength and facture toughness of the composite were studied. With the increase of Ni content, its flexural strength and facture toughness increases significantly. Microstuctural investigations of the composite revealed that fine nickel particles dispersed homogeneously at the matrix grain boundaries, forming the intergranular nanocomposite.

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High-Performance Ceramics III

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Periodical:

Key Engineering Materials (Volumes 280-283)

Pages:

1099-1102

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.280-283.1099

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Online since:

February 2007

Authors:

Sidi Gu, Zhao Qiang Zeng

Keywords:

Composite Ceramic, Hot-Pressing, Toughness

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© 2005 Trans Tech Publications Ltd. All Rights Reserved

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