Microstructure and Mechanical Properties of Tortoise Carapace Structure Bio-Inspired Hybrid Composite  

作　　者：Bao-Shuai Han Yan-Jin Xu En-Yu Guo Tao Jing Hong-Liang Hou Liang-Shun Luo 

机构地区：[1]AVIC Manufacturing Technology Institute,Beijing,Beijing 100024,China [2]School of Materials Science and Engineering,HarbinInstitute of Technology,Harbin 150001,China [3]School of Materials Science and Engineering,DalianUniversity of Technology,Dalian 116024,China [4]School of Materials Science and Engineering,TsinghuaUniversity,Beijing 100084,China

出　　处：《Acta Metallurgica Sinica(English Letters)》2018年第9期945-952,共8页金属学报（英文版）

基　　金：financially supported by the Defense Industrial Technology Development Program(JCKY2017205B032);National Natural Science Foundation of China(Nos.51405458,51371066 and 51331005)

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.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.

关 键 词：Bio-inspired composite Hierarchical structure Cracks propagation Flexural property 

分 类 号：TB33[一般工业技术—材料科学与工程]