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学者姓名：李加庆
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The sequential co-transportation of ammonia and refined oil has emerged as an efficient strategy to address the growing demand for large-scale onshore ammonia transportation. The interfacial characteristics between these fluids critically govern the evolution of the ammonia-oil mixing zone, which can directly affect the purity of ammonia and oil products. In this work, molecular dynamics simulations were employed to investigate the effect of temperature and pressure on the interfacial characteristics between ammonia and refined oil, with isooctane as the representative of refined oil. The results demonstrated that the increased temperature (280-300 K) and the decreased pressure (2-50 MPa) can disrupt the interfacial molecules, causing the ammonia-isooctane interface to become thicker and rougher. Under high temperature and low pressure, the voids at the interface of the isooctane phase can be expanded, and the ammonia-ammonia hydrogen bonds can be weakened, which can enhance the diffusion of ammonia molecules into the isooctane phase. Besides, the diffusion of ammonia molecules in ammonia phase can be promoted under high temperature and low pressure, and the diffusion coefficient of interfacial ammonia in the direction perpendicular to the interface is 1.4-1.8 times that of bulk ammonia in all directions and that of interfacial ammonia in the direction parallel to the interface. In addition, the increase in the thickness and roughness of the interface can lead to a decrease in the interfacial tension.
Keyword ：
Ammonia Ammonia Interfacial characteristics Interfacial characteristics Interfacial tension Interfacial tension Molecular dynamics simulation Molecular dynamics simulation
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| GB/T 7714 | Teng, Lin , Liu, Yi , Li, Zhenchao et al. The effect of temperature and pressure on the interfacial characteristics between ammonia and refined oil: A molecular dynamics simulation study [J]. | CHEMICAL ENGINEERING SCIENCE , 2025 , 320 . |
| MLA | Teng, Lin et al. "The effect of temperature and pressure on the interfacial characteristics between ammonia and refined oil: A molecular dynamics simulation study" . | CHEMICAL ENGINEERING SCIENCE 320 (2025) . |
| APA | Teng, Lin , Liu, Yi , Li, Zhenchao , Rao, Shihang , Huang, Xin , Li, Jiaqing et al. The effect of temperature and pressure on the interfacial characteristics between ammonia and refined oil: A molecular dynamics simulation study . | CHEMICAL ENGINEERING SCIENCE , 2025 , 320 . |
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While the single-particle impact model is widely used in studying the high-velocity impact behavior of particles, its scope is limited to the interaction between an individual particle and the substrate. In this work, a multi-particle molecular dynamics model was established to investigate the impact behavior of Cu nanoparticles and the surface quality of coatings. It was found that with the increase in particles' impact velocity from 100 m/s to 1500 m/s, three distinct coating structures can be identified: adhesion between nanoparticles, co-deformation, and liquefaction. Due to the anisotropy of plastic deformation, coatings formed by particles with the initial orientation [110] displayed the roughest surface, while those aligned with [111] and [001] exhibited smoother surfaces. Additionally, as nanoscale particles possess limited kinetic energy, it is difficult to create a large crater on the surface of the substrate. Therefore, it was necessary to elevate the temperature to soften the substrate, which can increase the crater depth and improve bonding quality. A successful approach to enhancing the bonding strength and surface quality of coatings involves simultaneous optimization of impact velocity, crystallographic orientation of particles, and substrate temperature. © 2024 The Authors
Keyword ：
3D printing 3D printing Additive manufacturing Additive manufacturing Cold spray Cold spray Deposition technology Deposition technology
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| GB/T 7714 | Zhang, C. , Li, Z. , Li, J. et al. Multi-particle impact behavior of Cu nanoparticles: A molecular dynamics investigation [J]. | Next Materials , 2025 , 6 . |
| MLA | Zhang, C. et al. "Multi-particle impact behavior of Cu nanoparticles: A molecular dynamics investigation" . | Next Materials 6 (2025) . |
| APA | Zhang, C. , Li, Z. , Li, J. , Gao, P. , Wang, R. , Xia, C. et al. Multi-particle impact behavior of Cu nanoparticles: A molecular dynamics investigation . | Next Materials , 2025 , 6 . |
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The temperature-dependent mechanisms for hydrogen-induced embrittlement and electrochemical corrosion in Ni-based superalloy 600 have been unravelled by means of tensile tests and potentiodynamic polarization tests under electrochemical environment. Increasing temperature accelerates electrochemical corrosion behaviour and induces the transition into intergranular corrosion, whereas there exists critical temperature THE, max, in which hydrogen-induced ductility loss reaches its peak. Detailed electron microscopy and thermal desorption spectroscopy analysis demystify that intergranular brittle fracture at THE, max is predominantly driven by hydrogen-dislocation-grain boundary interactions, compounded by high diffusible hydrogen content. These findings offer new insights into the critical role of temperature in modulating hydrogen embrittlement and corrosion, contributing to the design of materials in hydrogen environment.
Keyword ：
Hydrogen-dislocation-grain boundary Hydrogen-dislocation-grain boundary Hydrogen-induced brittle fracture Hydrogen-induced brittle fracture interaction interaction Intergranular corrosion Intergranular corrosion Ni-based superalloy Ni-based superalloy Temperature threshold Temperature threshold
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| GB/T 7714 | Li, Jiaqing , Yu, Xi , Zheng, Zhiye et al. Temperature-driven mechanisms of hydrogen embrittlement and electrochemical corrosion in Ni-based superalloy 600 [J]. | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T , 2025 , 35 : 6715-6727 . |
| MLA | Li, Jiaqing et al. "Temperature-driven mechanisms of hydrogen embrittlement and electrochemical corrosion in Ni-based superalloy 600" . | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 35 (2025) : 6715-6727 . |
| APA | Li, Jiaqing , Yu, Xi , Zheng, Zhiye , Lu, Kai , Teng, Lin , Ding, Yu et al. Temperature-driven mechanisms of hydrogen embrittlement and electrochemical corrosion in Ni-based superalloy 600 . | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T , 2025 , 35 , 6715-6727 . |
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Chromium-molybdenum steels are extensively used in manufacturing large-volume seamless hydrogen storage vessels, but they still suffer from the hydrogen embrittlement problem. In this study, electrochemical cathodic hydrogen charging is utilized to investigate the hydrogen embrittlement of 4130X steels, with emphasis on the influence of charging current density and temperature on hydrogen permeation and hydrogen embrittlement susceptibility. The hydrogen penetration rate and hydrogen diffusion coefficient of 4130X steel both increase with an increase in hydrogen-charging current density and temperature. The results demonstrate that the degree of hydrogen-induced degradation in tensile ductility is more marked with increasing hydrogen-charging current density, while the hydrogen embrittlement index exhibits a peak at a temperature of 308 K, in which brittle patterns like quasi-cleavage surfaces and crack formations occur. These findings are crucial for understanding hydrogen-induced embrittlement and determining test temperatures of hydrogen-related engineering material applications. © 2025 by the authors.
Keyword ：
Chromium steel Chromium steel Current density Current density Hydrogen embrittlement Hydrogen embrittlement Hydrogen storage Hydrogen storage Temperature Temperature Tensile strength Tensile strength
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| GB/T 7714 | Xu, Caijun , Wang, Fang , Li, Jiaqing . The Influence of Hydrogen-Charging Current Density and Temperature on Hydrogen Permeation and Hydrogen Embrittlement Susceptibility of 4130X Steel [J]. | Materials , 2025 , 18 (15) . |
| MLA | Xu, Caijun et al. "The Influence of Hydrogen-Charging Current Density and Temperature on Hydrogen Permeation and Hydrogen Embrittlement Susceptibility of 4130X Steel" . | Materials 18 . 15 (2025) . |
| APA | Xu, Caijun , Wang, Fang , Li, Jiaqing . The Influence of Hydrogen-Charging Current Density and Temperature on Hydrogen Permeation and Hydrogen Embrittlement Susceptibility of 4130X Steel . | Materials , 2025 , 18 (15) . |
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Austenitic stainless steel (ASS) is a common material used in high-pressure hydrogen systems. Prolonged exposure to high-pressure hydrogen can cause hydrogen embrittlement (HE), raising significant safety concerns. Selective Laser Melting (SLM), known for its high precision, is a promising additive manufacturing technology that has been widely adopted across various industries. Studies have reported that under certain SLM manufacturing conditions and process parameters, the HE resistance of SLM ASS is significantly better than that of conventionally manufactured (CM) ASS, showing great potential for application in high-pressure hydrogen systems. Thus, studying the HE of SLM ASS is crucial for further improving the safety of high-pressure hydrogen systems. This paper provides an overview of the SLM process, reviews the mechanisms of HE and their synergistic effects, and analyzes the HE characteristics of SLM ASS. Additionally, it examines the influence of unique microstructures and SLM process variables on HE of SLM ASS and offers recommendations for future research to enhance the safety of high-pressure hydrogen systems. (c) 2025 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
Keyword ：
Additive manufacturing Additive manufacturing Austenitic stainless steel Austenitic stainless steel Hydrogen damage Hydrogen damage Hydrogen embrittlement Hydrogen embrittlement Processing parameter Processing parameter Selective laser melting Selective laser melting
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| GB/T 7714 | Zhou, Chilou , Yan, Xinrui , Wang, Haixiang et al. Advancements in hydrogen embrittlement of selective laser melting austenitic stainless steel: Mechanisms, microstructures, and future directions [J]. | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY , 2025 , 230 : 219-235 . |
| MLA | Zhou, Chilou et al. "Advancements in hydrogen embrittlement of selective laser melting austenitic stainless steel: Mechanisms, microstructures, and future directions" . | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 230 (2025) : 219-235 . |
| APA | Zhou, Chilou , Yan, Xinrui , Wang, Haixiang , Huang, Yanlei , Xue, Jinxin , Li, Jiaqing et al. Advancements in hydrogen embrittlement of selective laser melting austenitic stainless steel: Mechanisms, microstructures, and future directions . | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY , 2025 , 230 , 219-235 . |
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Understanding plastic deformation behaviour is key to optimising the mechanical properties of nano-polycrystalline layered composites. This study employs the molecular dynamics (MD) simulation to comprehensively investigate the effects of various factors, such as grain sizes, strain rates, and the interlayer thicknesses of the intermetallic compounds (IMCs), on the plastic deformation behaviour of nano-polycrystalline Al/Mg layered composites. Our findings reveal that the influence of grain size on deformation behaviour is governed by the strain rate, and an increase in grain size is inversely proportional to yield stress at low strain rates, whereas it is positively proportional to tensile stress at high strain rates. Moreover, an optimal thickness of the intermediate layer contributes to enhanced composite strength, whereas an excessive thickness leads to reduced tensile strength due to the fewer grain boundaries (GBs) available for accommodating dislocations. The reinforcing impact of the intermediate IMCs layer diminishes at excessive strain rates, as the grains struggle to accommodate substantial large strains within a limited timeframe encountered at high strain rates. The insights into grain sizes, strain rates, and interlayer thicknesses obtained from this study enable the tailored development of nanocomposites with optimal mechanical characteristics.
Keyword ：
Al/Mg layered composites Al/Mg layered composites intermetallic compounds intermetallic compounds molecular dynamics simulation molecular dynamics simulation plastic deformation mechanism plastic deformation mechanism
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| GB/T 7714 | Li, Zhou , Shen, Tong , Hu, Xiao et al. The Plastic Deformation Mechanism in Nano-Polycrystalline Al/Mg Layered Composites: A Molecular Dynamics Study [J]. | NANOMATERIALS , 2024 , 14 (1) . |
| MLA | Li, Zhou et al. "The Plastic Deformation Mechanism in Nano-Polycrystalline Al/Mg Layered Composites: A Molecular Dynamics Study" . | NANOMATERIALS 14 . 1 (2024) . |
| APA | Li, Zhou , Shen, Tong , Hu, Xiao , Zhang, Lu , Jia, Xianshi , Li, Jiaqing et al. The Plastic Deformation Mechanism in Nano-Polycrystalline Al/Mg Layered Composites: A Molecular Dynamics Study . | NANOMATERIALS , 2024 , 14 (1) . |
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【目的】在“双碳”背景下，氨作为无碳富氢的能源载体，体积能量密度高、易液化存储，具有广阔的发展前景。然而复杂的储运环境增加了液氨储罐和管道腐蚀的风险，因此，研究复杂输送环境下液氨腐蚀问题是“氨-氢”能源基础设施制造和安全服役的关键。【方法】通过综述液氨腐蚀的研究进展，探讨了不同环境、不同材料的氨腐蚀行为和应力腐蚀开裂机制。同时，总结了相关氨腐蚀检测方法和具体防护措施，并展望了未来氨腐蚀研究的发展方向。【结果】氧气、碳氧化合物、硫化物及氯化物的混入对氨腐蚀有促进作用，而水杂质对氨腐蚀的影响具有两面性；应力能够引起液氨应力腐蚀开裂，不同材料的应力腐蚀敏感性从大到小依次为铜及其合金、高强钢、碳钢。【结论】基于国内对液氨腐蚀行为机理尚不明确、氨腐蚀防护措施有待完善等问题，提出以下建议：(1)采用实验研究、仿真模拟等方法，探究多杂质关联作用下不同材质的液氨腐蚀行为和内在腐蚀机理；(2)需结合液氨管道实际输送环境及材料失效特征，开展管线钢及焊材-液氨临界失效边界检验与腐蚀风险评价；(3)从液氨储罐及管道的设计、选材、制造、使用等多个角度，结合多种腐蚀防腐措施，形成完善的液氨储运系统腐蚀控制、防护及评价标准体系。（图5，表2，参77）
Keyword ：
应力腐蚀 应力腐蚀 液氨储运 液氨储运 环境腐蚀 环境腐蚀 腐蚀检测 腐蚀检测 防护技术 防护技术
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| GB/T 7714 | 李加庆 , 冯智雨 , 梁辉龙 et al. 复杂输送环境下液氨腐蚀行为及防护技术研究进展 [J]. | 油气储运 , 2024 , 43 (02) : 121-133,162 . |
| MLA | 李加庆 et al. "复杂输送环境下液氨腐蚀行为及防护技术研究进展" . | 油气储运 43 . 02 (2024) : 121-133,162 . |
| APA | 李加庆 , 冯智雨 , 梁辉龙 , 尹鹏博 , 滕霖 , 陈崇启 et al. 复杂输送环境下液氨腐蚀行为及防护技术研究进展 . | 油气储运 , 2024 , 43 (02) , 121-133,162 . |
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【目的】绿氨作为氢能的优质载体，生产工艺无碳化的优势使其成为实现碳中和目标的备选能源之一，因此绿氨终端站的布局与建设对促进氢能产业链的快速发展具有重要作用，有利于推动社会能源结构的绿色转型。【方法】概述了氨的性质：氨作为高效的储能与储氢介质，具有高能量密度、易储运、终端站无碳排放、安全性高等特点，能够显著降低储氢、运氢、用氢的成本，并可提高能源安全性。分析了氨用于储氢与储能介质具有的能量密度高、安全、长时储能等优势，调研了全球多国的氨氢项目发展与贸易情况，论述了全球快速增长的绿氨产能及需求，总结了目前氨能的贸易现状与终端站建设情况；对比目前成熟的LNG接收站相关工艺技术，详细介绍了绿氨终端站的关键工艺及技术，包括终端站绿氨存储工艺系统、液氨蒸发气处理工艺系统、终端站加注及卸载工艺系统。【结果】提出绿氨终端站的安全性问题，深入剖析了终端站液氨泄漏导致的毒性、燃烧爆炸性等危害，并给出了预防及防护措施。【结论】从化肥行业到能源领域，绿氨终端站技术的研究与发展对促进绿色能源氢能的利用具有重要意义，未来绿氨终端站的数量与规模将持续增加以适应新时代的需求，同时可以考虑改造LNG接收站等大宗能源及化工品储运设施以降低成本。（图5，表3，参59）
Keyword ：
储氢载体 储氢载体 接收工艺 接收工艺 接收终端 接收终端 液氨泄漏 液氨泄漏 碳中和 碳中和 绿氢 绿氢 绿氨 绿氨 绿色能源 绿色能源
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| GB/T 7714 | 滕霖 , 林崴 , 尹鹏博 et al. 碳中和目标下绿氨终端站储运技术发展现状及趋势 [J]. | 油气储运 , 2024 , 43 (01) : 1-11 . |
| MLA | 滕霖 et al. "碳中和目标下绿氨终端站储运技术发展现状及趋势" . | 油气储运 43 . 01 (2024) : 1-11 . |
| APA | 滕霖 , 林崴 , 尹鹏博 , 李卫东 , 黄鑫 , 李加庆 et al. 碳中和目标下绿氨终端站储运技术发展现状及趋势 . | 油气储运 , 2024 , 43 (01) , 1-11 . |
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Excessive electric field strength causes the droplets to contact but not coalesce, severely deteriorating the oil-water separation efficiency. The investigation of the non-coalescence of nonidentical droplets in oil under a DC electric field is conducted using high-speed photography. The effects of droplet volume ratio and interfacial tension ratio on the characteristics and critical parameters for droplet non-coalescence are systematically explored. The results show the critical electrocapillary number for the non-coalescence of nonidentical droplets and critical contact cone angle decreases as the volume sum increases or the interfacial tension ratio decreases, which is related to the competition between the resultant electric field force and the interfacial tension force. These results contribute to optimizing the operating parameters of the electric coalescer and improving the oil-water separation efficiency.
Keyword ：
capillary pressure difference capillary pressure difference droplet droplet electric field electric field liquid bridge liquid bridge nonidentical non-coalescence nonidentical non-coalescence
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| GB/T 7714 | Huang, Xin , Chen, Mindan , Huang, Yunyun et al. Non-coalescence of nonidentical droplets in oil under a DC electric field [J]. | AICHE JOURNAL , 2024 , 70 (8) . |
| MLA | Huang, Xin et al. "Non-coalescence of nonidentical droplets in oil under a DC electric field" . | AICHE JOURNAL 70 . 8 (2024) . |
| APA | Huang, Xin , Chen, Mindan , Huang, Yunyun , Luo, Xiaoming , Teng, Lin , Xiao, Longqiang et al. Non-coalescence of nonidentical droplets in oil under a DC electric field . | AICHE JOURNAL , 2024 , 70 (8) . |
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The droplet dynamic model under an electric field is established in this paper by coupling electric equations, multiphase flow equations, and isoAdvector interface capture method, accurately predicting the deformation and rupture characteristics of multiple emulsion droplets affected by an electric field. The evolutions of the flow field and electric field during the deformation and breakup processes of multiple emulsion droplets subjected to an electric field are elucidated and the effects of the electric capillary number Ca and the radius ratio R* of the inner and outer droplets on the characteristics of droplet deformation and rupture are analyzed. The results show that in the silicone oil/water emulsion system, the inner droplet is difficult to induce charge since the electrostatic shielding effect of the outer droplet, and it has no impact on the equilibrium deformation of the outer droplet; whereas in the castor oil/silicone oil emulsion system, the charge is induced on the interfaces of both the internal and external droplets and the internal droplet has a remarkable impact on the equilibrium deformation of the external droplet. Furthermore, deformation-breakup phase diagrams of multiple emulsion droplets exposed to the electric field are obtained. As R* increases, the Cac for droplet breakup decreases, indicating that the internal droplet intensifies the breakup of the external droplet. The results are significant for the promotion and application of electric field-driven droplet manipulation technology.
Keyword ：
Breakup Breakup Deformation Deformation Electric field Electric field isoAdvector isoAdvector Multiple emulsion Multiple emulsion
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| GB/T 7714 | Huang, Xin , Lu, Yijia , Li, Yilong et al. The isoAdvector method for simulating deformation and breakup of multiple emulsion droplets responding to a DC electric field [J]. | JOURNAL OF ELECTROSTATICS , 2024 , 129 . |
| MLA | Huang, Xin et al. "The isoAdvector method for simulating deformation and breakup of multiple emulsion droplets responding to a DC electric field" . | JOURNAL OF ELECTROSTATICS 129 (2024) . |
| APA | Huang, Xin , Lu, Yijia , Li, Yilong , Luo, Xiaoming , Teng, Lin , Li, Weidong et al. The isoAdvector method for simulating deformation and breakup of multiple emulsion droplets responding to a DC electric field . | JOURNAL OF ELECTROSTATICS , 2024 , 129 . |
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