High-Temperature Multilayer Composites with Superplastic Interlayers

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 Al2O3/MoSi2+Mo2B5 system in the present work; in this system, Al2O3 was the hard layer and MoSi2+Mo2B5 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.