Abstract
A turtle carapace bio-inspired Ti matrix hybrid composite was successfully fabricated in this work. This composite incorporates two parts: the Ti–Al intermetallic multilayered composite and continuous SiC fibers-reinforced Ti matrix composite. In the Ti–Al intermetallic multilayered composite part, a series of Ti–Al intermetallics compounds, including Ti3Al, TiAl, TiAl2 and TiAl3, were formed between the Ti layers. In the continuous SiC fibers-reinforced Ti matrix composite part, SiC fibers and Ti matrix were found to be bonded well through weak interface reaction. Flexural strength of this material reached 1.21 ± 0.16 GPa, measured by three-point bending test. The deformation features suggest that the hierarchical structure combining ductile Ti layers/matrix with brittle high-strength Ti–Al intermetallics layers/SiC fibers can effectively enhance the mechanical properties of the bio-inspired hybrid composite.
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Acknowledgements
This work was financially supported by the Defense Industrial Technology Development Program (JCKY2017205B032) and National Natural Science Foundation of China (Nos. 51405458, 51371066 and 51331005).
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Han, BS., Xu, YJ., Guo, EY. et al. Microstructure and Mechanical Properties of Tortoise Carapace Structure Bio-Inspired Hybrid Composite. Acta Metall. Sin. (Engl. Lett.) 31, 945–952 (2018). https://doi.org/10.1007/s40195-018-0727-3
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DOI: https://doi.org/10.1007/s40195-018-0727-3