Hits:

Indexed by:期刊论文

Date of Publication:2018-09-01

Journal:ACTA METALLURGICA SINICA-ENGLISH LETTERS

Included Journals:SCIE

Volume:31

Issue:9

Page Number:945-952

ISSN No.:1006-7191

Key Words:Bio-inspired composite; Hierarchical structure; Cracks propagation; Flexural property

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.