On the toughening of ceramics by whiskers
1987; Pergamon Press; Volume: 21; Issue: 5 Linguagem: Inglês
10.1016/0036-9748(87)90384-x
ISSN1878-2663
AutoresM. Rühle, B.J. Dalgleish, A.G. Evans,
Tópico(s)Aluminum Alloys Composites Properties
ResumoThe toughening of ceramics by whiskers is now an established phenomenon. However, the prevalent toughening mechanism have not been rigorously identified, and microstructures that afford optimum toughness cannot yet be specified. Various toughening mechanisms have been proposed. These include deflection, microcracking and bridging. The dominant micro-structural characteristics differ substantially for each of these mechanisms. Consequently, it is important to establish the prevalent mechanisms operative in specific material systems. The purpose of the present study is to investigate toughening in a SiC whisker toughened Al/sub 2/O/sub 3/, with the objective of establishing experimental procedures that allow identification of the principal toughening mechanism.
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