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High‐Temperature Multilayer Composites with Superplastic Interlayers

1999; Wiley; Volume: 82; Issue: 11 Linguagem: Inglês

10.1111/j.1151-2916.1999.tb02236.x

1551-2916

Guojun Zhang, Xue‐Mei Yue, Tadahiko Watanabe,

Intermetallics and Advanced Alloy Properties

A high‐temperature multilayer composite (MLC) with hot hard layers and superplastic layers was proposed in this communication. The hard layer can provide the MLC high‐temperature strength; the superplastic layer can deform plastically at high temperatures, disperse the applied stress, and stop the crack from advancing. Such an MLC was prepared via tape casting in the Al 2 O 3 /MoSi 2 +Mo 2 B 5 system in the present work; in this system, Al 2 O 3 was the hard layer and MoSi 2 +Mo 2 B 5 was the superplastic layer. The microstructures and the stress‐displacement behaviors of the MLCs were investigated. Finally, the design rules for the high‐temperature MLCs were discussed briefly.