期刊
MATERIALS
卷 11, 期 5, 页码 -出版社
MDPI
DOI: 10.3390/ma11050680
关键词
shell; bionic design; coupling layered structure; mechanical property
类别
资金
- Cooperative Innovation Platform of National Oil Shale Exploration Development and Research
- National Natural Science Foundation [5167050531]
- Key Scientific and Technological Project of Jilin Province [20180201051GX]
- Advanced Manufacturing Project of Common Construction of Province and School (Industrial Demonstration Engineering) [SXGJSF2017-2]
- Program for JLU Science and Technology Innovative Research Team [2017TD-04]
Based on microstructure characteristics of Meretrix lusoria shell and Rapana venosa shell, bionic coupling layered B4C/5083Al composites with different layered structures and hard/soft combination models were fabricated via hot pressed sintering. The simplified bionic coupling models with hard and soft layers were similar to layered structure and hardness tendency of shells, guiding the bionic design and fabrication. B4C/5083Al composites with various B4C contents and pure 5083Al were treated as hard and soft layers, respectively. Hot pressed sintering maintained the designed bionic structure and enhanced high bonding strength between ceramics and matrix. Compared with B4C/5083Al composites, bionic layered composites exhibited high mechanical properties including flexural strength, fracture toughness, compressive strength and impact toughness. The hard layers absorbed applied loads in the form of intergranular fracture. Besides connection role, soft layers restrained slabbing phenomenon and reset extension direction of cracks among layers. The coupling functions of bionic composites proved the feasibility and practicability of bionic fabrication, providing a new method for improvement of ceramic/Al composite with properties of being lightweight and high mechanical strength.
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