THE COARSENING BEHAVIOR OF DUPLEX AL2O3 NIAL2O4 COMPOSITES/

Authors
TUAN WH LIN MC TZING WH
Citation
Wh. Tuan et al., THE COARSENING BEHAVIOR OF DUPLEX AL2O3 NIAL2O4 COMPOSITES/, Materials chemistry and physics, 48(2), 1997, pp. 156-159
Citations number
11
Categorie Soggetti
Material Science
Journal title
Materials chemistry and physics → ACNP
ISSN journal
02540584
Volume
48
Issue
2
Year of publication
1997
Pages
156 - 159
Database
ISI
SICI code
0254-0584(1997)48:2<156:TCBODA>2.0.ZU;2-C
Abstract
In the present study, the grain growth behavior of Al2O3/NiAl2O4 compo site is compared with that of Al2O3 and of NiAl2O4. Duplex Al2O4/NiAl2 O4 composite shows strong resistance to coarsening. The activation ene rgy for the grain growth of monolithic Al2O3 is the same as that of Al 2O3 in composite. However, the activation energy for the grain growth of NiAl2O4 is changed as NiAl2O4 is surrounded by Al2O3. The shape of Al2O3 grains in composite is also different from that of Al2O3 in mono lithic alumina. The coarsening of one phase in the composite is thus c onstrained by the presence of another phase.