TY - JOUR
T1 - Generation of high-saturation two-level iridescent structures by vibration-assisted fly cutting
AU - He, Yupeng
AU - Zhou, Tianfeng
AU - Dong, Xiaobin
AU - Liu, Peng
AU - Zhao, Wenxiang
AU - Wang, Xibin
AU - Hu, Yao
AU - Yan, Jiwang
N1 - Funding Information:
This work has been financed by the National Key Basic Research Program of China (No. 2015CB059900 ) and the National Natural Science Foundation of China (No. 51775046 & No. 51875043 ). The authors would also like to acknowledge the support from the Fok Ying-Tong Education Foundation for Young Teachers in the Higher Education Institutions of China (No. 151052 ).
PY - 2020/8
Y1 - 2020/8
N2 - The submicron-level structured surface induces viewing-angle-dependent iridescence, and has wide applications in multi-color printing, micro-display projection, invisibility cloak technology. In this study, several types of two-level structures, which consist of the first-order micro geometric features corresponding to the pattern shape and the second-order submicron grooves corresponding to the diffraction grating, are designed to directly induce a variety of iridescent patterns based on their shape regulations. To fabricate these two-level iridescent structures with high accuracy in a single step, vibration-assisted fly cutting (VAFC) is proposed. VAFC involves the low-frequency vibration of the workpiece in the vertical direction during the feed in the horizontal direction and the high-speed rotation of the diamond cutting tool. A 3D theoretical model is established for the numerical simulation of the generating process of the iridescent structures and the regulation of the first-order geometric feature by vibration parameters. As the key parameter to the iridescent color, the spacing of the second-order submicron grooves is flexibly controlled by the feed rate. A VAFC platform is developed to fabricate the two-level structures and an optical detection system is setup to test the surface iridescence. Various vivid colors are regulated by the two-level structures with high saturation and uniformity.
AB - The submicron-level structured surface induces viewing-angle-dependent iridescence, and has wide applications in multi-color printing, micro-display projection, invisibility cloak technology. In this study, several types of two-level structures, which consist of the first-order micro geometric features corresponding to the pattern shape and the second-order submicron grooves corresponding to the diffraction grating, are designed to directly induce a variety of iridescent patterns based on their shape regulations. To fabricate these two-level iridescent structures with high accuracy in a single step, vibration-assisted fly cutting (VAFC) is proposed. VAFC involves the low-frequency vibration of the workpiece in the vertical direction during the feed in the horizontal direction and the high-speed rotation of the diamond cutting tool. A 3D theoretical model is established for the numerical simulation of the generating process of the iridescent structures and the regulation of the first-order geometric feature by vibration parameters. As the key parameter to the iridescent color, the spacing of the second-order submicron grooves is flexibly controlled by the feed rate. A VAFC platform is developed to fabricate the two-level structures and an optical detection system is setup to test the surface iridescence. Various vivid colors are regulated by the two-level structures with high saturation and uniformity.
KW - Iridescence
KW - Microstructure
KW - Structural color
KW - Submicron structure
KW - Two-level structure
KW - Vibration-assisted fly cutting
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U2 - 10.1016/j.matdes.2020.108839
DO - 10.1016/j.matdes.2020.108839
M3 - Article
AN - SCOPUS:85086079923
VL - 193
JO - Materials and Design
JF - Materials and Design
SN - 0261-3069
M1 - 108839
ER -