Mechanical properties and structural evolution of sodium borosilicate glasses during uniaxial tension: Molecular dynamics simulation and experiments

IF 5.1 2区 材料科学 Q1 MATERIALS SCIENCE, CERAMICS
Zeyu Kang , Pengfei Xu , lulu Zhang , Ziang Liu , Yan Liu , Wenkai Gao , Yi Cao , Yunlong Yue , Junfeng Kang
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Abstract

The mechanical properties and structural evolution of sodium borosilicate glasses under the uniaxial tensile process were investigated through molecular dynamics simulation. The simulated properties of sodium borosilicate glasses were in good agreement with the experimental values. [BO3] and Na+ compensated [BO4] groups were generated in the glass network in low boron content, while [BO3] appeared with increasing boron oxide. The structure descriptor, Fnet synthesized the structure and energy information of the glass network which was positively correlated with Young's modulus. The strength has been diminished due to the decreased degree of polymerization of the glass network and the migration of Na+ cations. Simultaneously, the elastic deformation of sodium borosilicate glass arose from the motion of Na+ cations and alterations in the Si-O-Si bond angle. Moreover, the plastic deformation of sodium borosilicate glasses was attributed to the transition from [BO4] to [BO3] and the higher mobility of [BO3] than [BO4] and [SiO4].
硼硅酸钠玻璃在单轴拉伸过程中的力学性能和结构演变:分子动力学模拟和实验
通过分子动力学模拟研究了硼硅酸钠玻璃在单轴拉伸过程中的力学性能和结构演变。硼硅酸钠玻璃的模拟性能与实验值十分吻合。硼含量低时,玻璃网络中会产生[BO3]和 Na+ 补偿[BO4]基团,而[BO3]则随着氧化硼含量的增加而出现。结构描述符 Fnet 综合了玻璃网络的结构和能量信息,与杨氏模量呈正相关。由于玻璃网络聚合度的降低和 Na+ 阳离子的迁移,强度有所降低。同时,硼硅酸钠玻璃的弹性变形源于 Na+ 阳离子的运动和 Si-O-Si 键角的改变。此外,硼硅酸钠玻璃的塑性变形归因于[BO4]向[BO3]的转变,以及[BO3]比[BO4]和[SiO4]更高的迁移率。
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来源期刊
Ceramics International
Ceramics International 工程技术-材料科学:硅酸盐
CiteScore
9.40
自引率
15.40%
发文量
4558
审稿时长
25 days
期刊介绍: Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties. Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour. Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.
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