| Microwave Sintering of Sol-Gel Alumina-30 vol%
SiC Particulate Composites |
S. ANANTHAKUMAR, U.S. HAREESH AND K. G. K. WARRIER
Pages : 93-95
DOI : 10.1080/0371750X.1997.10804803 |
| Abstract |
| AI20rSiC composite precursor has been made by dispersing
fine SiC particles in a boehmite (AIOOH) matrix at pH 3.5
and slowly flocculating to pH 7.5 by dropwise addition of
dilute NH40H solution while the whole mixture was kept
under constant stirring. The gel thus obtained is further dried
under humid conditions and thermally dehydroxylated below
600°C. This precursor has been further subjected to microwaves
having frequency 2.45 GHz and 600 W power under a
"Picket Fencing" arrangement and sintered to reasonably
higher densities. In a similar way, identical samples have been
sintered in an electrical furnace up to 1450°C and the sintered
properties are compared. |
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