Premium
Densification of Alumina‐Silicon Carbide Powder Composites: II, Microstructural Evolution and Densification
Author(s) -
Jang Hyun M.,
Rhine Wendell E.,
Bowen H. Kent
Publication year - 1989
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1989.tb06251.x
Subject(s) - materials science , silicon carbide , shrinkage , composite material , grain growth , microstructure , carbide , kinetics , grain size , physics , quantum mechanics
Microstructural evolution adn densification kinetics of Al 2 O 3 ‐SiC powder composites were studied using two different SiC powders. Examination of the microstructural evolution of Al 2 O 3 ‐fine SiC powder composites showed three well‐defined stages of densification: the first was characterized by constant pore size and no grain growth; the second involved rapid pore coarsening and grain growth; the third was characterized by pore shrinkage and slow grain growth. Studies of the densification kinetics of Al 2 O 3 ‐coarse SiC powder composites exhibited two stages of densification: in the first stage there were no significant differences in densification rate between pure Al 2 O 3 compacts and composites; in the second stage, however, differences in densification behavior between pure Al 2 O 3 compacts and composites became pronounced.