首页|Isotropic sintering shrinkage of 3D glass-ceramic nanolattices:backbone preforming and mechanical enhancement
Isotropic sintering shrinkage of 3D glass-ceramic nanolattices:backbone preforming and mechanical enhancement
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There is a perpetual pursuit for free-form glasses and ceramics featuring outstanding mechanical properties as well as chemical and thermal resistance.It is a promising idea to shape inorganic materials in three-dimensional(3D)forms to reduce their weight while maintaining high mechanical properties.A popular strategy for the preparation of 3D inorganic materials is to mold the organic-inorganic hybrid photoresists into 3D micro-and nano-structures and remove the organic components by subsequent sintering.However,due to the discrete arrangement of inorganic components in the organic-inorganic hybrid photoresists,it remains a huge challenge to attain isotropic shrinkage during sintering.Herein,we demonstrate the isotropic sintering shrinkage by forming the consecutive-Si-O-Si-O-Zr-O-inorganic backbone in photoresists and fabricating 3D glass-ceramic nanolattices with enhanced mechanical properties.The femtosecond(fs)laser is used in two-photon polymerization(TPP)to fabricate 3D green body structures.After subsequent sintering at 1000 ℃,high-quality 3D glass-ceramic microstructures can be obtained with perfectly intact and smooth morphology.In-suit compression experiments and finite-element simulations reveal that octahedral-truss(oct-truss)lattices possess remarkable adeptness in bearing stress concentration and maintain the structural integrity to resist rod bending,indicating that this structure is a candidate for preparing lightweight and high stiffness glass-ceramic nanolattices.3D printing of such glasses and ceramics has significant implications in a number of industrial applications,including metamaterials,microelectromechanical systems,photonic crystals,and damage-tolerant lightweight materials.
3D printingisotropic shrinkagefemtosecond lasertwo-photon polymerizationstructural glass-ceramics
Nianyao Chai、Yunfan Yue、Xiangyu Chen、Zhongle Zeng、Sheng Li、Xuewen Wang
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Center of Femtosecond Laser Manufacturing for Advanced Materials and Devices,State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Wuhan 430070,People's Republic of China
International School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,People's Republic of China
National Energy Key Laboratory for New Hydrogen-Ammonia Energy Technologies,Foshan Xianhu Laboratory,Foshan 528000,People's Republic of China
National Key Research and Development Program of ChinaHainan Provincial Joint Project of Sanya Yazhou Bay Science and Technology CityGuangdong Basic and Applied Basic Research Foundation
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