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ChemInform Abstract: Reduction and Sintering of a Nickel-Dispersed-Alumina Composite and Its Properties.

✍ Scribed by T. SEKINO; T. NAKAJIMA; S. UEDA; K. NIIHARA

Publisher
John Wiley and Sons
Year
2010
Weight
29 KB
Volume
28
Category
Article
ISSN
0931-7597

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✦ Synopsis

Reduction and Sintering of a Nickel-Dispersed-Alumina Composite and Its Properties.

-Title composites of high density with superior mechanical properties are prepared by reduction and hot pressing of powder mixtures of Al2O3 and NiO using NiO or Ni(NO3)2β€’nH2O as Ni source. Composites with Ni particles of β‰ˆ100 nm diameter homogeneously dispersed at the matrix-grain boundaries forming an intergranular nanocomposite are obtained from the nitrate. For Al2O3/5 vol% Ni composites prepared from the nitrate, a fracture strength of ΒΏ 1 GPa is determined. By modification of the microstructure during the fabrication process both the mechanical and the magnetic properties in the ceramic-metal nanocomposite can be controlled. -

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