Quasi-static compressive and cyclic dynamic impact performances of vat photopolymerization 3D printed Al2O3 triply periodic minimal surface scaffolds and Al2O3/Al hybrid structures: Effects of cell size

被引:12
作者
Lu, Junjie [1 ]
Zhang, Xueqin [1 ]
Li, Suwen [1 ,2 ]
Zhang, Lu [1 ]
Wang, Wenqing [1 ]
Li, Zengchan [1 ,2 ]
Zhang, Yanpeng [3 ]
Wang, Gang [2 ]
Li, Ying [1 ]
He, Rujie [1 ,2 ]
机构
[1] Beijing Inst Technol, Inst Adv Struct Technol, Beijing 100081, Peoples R China
[2] Anhui Polytech Univ, Anhui Key Lab High Performance Nonferrous Met Mat, Wuhu 241000, Peoples R China
[3] Beijing Perfect Protect Technol Co Ltd, Beijing 102599, Peoples R China
基金
中国国家自然科学基金;
关键词
3D printing; Al 2 O 3 ceramic scaffolds; Al 2 O 3 /Al hybrid structures; Triply periodic minimum surface; Quasi-static compression; Cyclic shock; MECHANICAL-PROPERTIES; COMPOSITES;
D O I
10.1016/j.jallcom.2023.172445
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
In this study, Al2O3 triply periodic minimal surface (TPMS) scaffolds with cell sizes of 5 mm, 8.5 mm, and 12 mm were prepared by vat photopolymerization 3D printing, and Al2O3/Al ceramic-metal hybrid structures were subsequently obtained by the metal infiltration of AlSi10Mg. To investigate the influence of cell size on the mechanical properties of vat photopolymerization 3D printed Al2O3 TPMS scaffolds and Al2O3/Al hybrid structures, quasi-static compression and dynamic impact experiments were conducted, and the failure modes during experiments were discussed. It was shown that the quasi-static compression and dynamic impact prop-erties of Al2O3 TPMS scaffolds gradually decreased with the increase in cell size, the compression strength decreased from 15.2 MPa to 8 MPa and the impact strength decreased from 37 MPa to 11 MPa, respectively, which was related to the stress transfer ability of the single cell. In contrast, the effects of cell size on the per-formance of Al2O3/Al hybrid structures were opposite. When the cell size increased, the quasi-static compression performances of the Al2O3/Al hybrid structure were greatly improved, and the compression strength increased from 175 MPa to 250 MPa. The impact resistances of the Al2O3/Al hybrid structure were further studied. The highest impact strength of the Al2O3/Al hybrid structure was 290.74 MPa. With the increase in cell size, the impact resistance of the Al2O3/Al hybrid structure had a gradual improvement trend. Under the cyclic impact, the Al2O3/Al hybrid structure showed a high impact strength and energy absorption capacity, which was mainly related to the metal phase content around the cell, i.e., the coherence of the metal phase. This study is believed to give help for the structural design of ceramic scaffolds and ceramic-metal hybrid structures.
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页数:15
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