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论文类型：期刊论文

发表时间：2018-09-01

发表刊物：ACTA METALLURGICA SINICA-ENGLISH LETTERS

收录刊物：SCIE

卷号：31

期号：9

页面范围：945-952

ISSN号：1006-7191

关键字：Bio-inspired composite; Hierarchical structure; Cracks propagation; Flexural property

摘要：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.