Small
·
2025
·
IF 12.1
Shaojie Mo,Ang Xu,Mo Li,Zhongyang Zheng,Youwei Yan,Xinyun Wang,Heping Li
Hydrogen embrittlement in metals seriously threatens the safe and durable operation of hydrogen energy. Developing efficient and robust hydrogen barriers is a viable solution to solve this issue but remains a significant challenge. An amorphous (ErAlCrZrTi)O high-entropy nanofilm is successfully fabricated via sol-gel on steel and identified as highly efficient and robust hydrogen barrier. At 270 nm thickness, the nanofilm achieves ultra-low hydrogen permeability of 1.35 × 10 −15 mol m −1 s −1 Pa −0.5 , enhancing hydrogen resistance by 2738 times at 500 °C compared with that of bare steel. Compared to Er 2 O 3 , Al 2 O 3 , Cr 2 O 3 , and ZrO 2 , it improves hydrogen resistance by 5, 11, 26, and 90 times, respectively. Moreover, such a high hydrogen resistance can be satisfyingly retained even after the (ErAlCrZrTi)O nanofilm suffering 10 dpa irradiation. The nanofilm exhibits 37 MPa bonding strength and exceptional thermal shock resistance, attributed to the formation of Cr₂O₃ transition layer via precipitation and oxidation of Cr from the substrate during annealing. It strengthens adhesion and alleviates thermal expansion mismatch with the substrate. The mechanism for the high barrier efficiency is further revealed by this theoretical calculations. These results provide tremendous insights on the understanding and future design of high-performance hydrogen barriers for hydrogen embrittlement prevention.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF REINFORCED PLASTICS AND COMPOSITES
·
2025
·
IF 2.2
Xilong Huang,Linghong Zeng,Yongli Chen,Lu Wang,Wenyan Lv,Huixing Lin
Hydrogen embrittlement is a significant flaw in ultra-low temperature storage materials, leading to potential hydrogen leakage and subsequent explosions. In this study, an excellent cryogenic properties carbon fiber (T300) /epoxy composite (CFRP) is prepared by having diglycidyl 4-cyclohexene-1,2-dicarboxylate with excellent cryogenic properties as matrix material, bis(3-aminopropyl)-capped polydimethylsiloxane (Mn = 1000) as a curing agent, and 2-ethyl-4-methylimidazole as an accelerator. The experimental results show that the tensile strength of the pure epoxy resin is increased to 37.97 MPa and the elongation at break is reduced to 4.71% when the mass ratio of curing agent to accelerator is 5:5 (EP55). The CFRP prepared based on EP55 has a tensile strength of 221.7 MPa and a flexural strength of 251.5 MPa at 77 K, which only reduces by 2.63% and 12.01% compared with the room temperature, respectively, proving that the excellent ultra-low temperature resistance properties. In addition, scanning electron microscopy (SEM) is utilized to investigate the failure mechanisms of CFRP based on the [0°/45°/90°/135°] layering modes. It mainly attributed to the incorporation of Si-O flexible chains, which enhance the motility of the crosslink network at 77 K, thereby improving load transfer and promoting shear band formation.
研究领域:
材料科学
·
工程学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Yuanchen Zhu,Gang Liu,Zhenying Cui,Hongwei Yang,Fang Liu,Baolei Jiang,Lei Chen
Blending hydrogen into existing natural gas pipelines is a cost-effective method for large-scale hydrogen transportation. However, high hydrogen ratios cause hydrogen embrittlement in pipeline steel, limiting transportation efficiency. Due to complex structures and harsh application conditions, existing coatings are difficult to apply on pipelines. To tackle such issues, we propose an ionic liquid-polymer composite coating using epoxy resin as coating substrate, based on the competitive adsorption of methane and hydrogen on pipeline steel. Ionic liquids with high methane selectivity were selected via quantum chemical calculation. The protective effect of coatings was characterized using hydrogen pre-charging constant strain tensile tests. Simulation and experimental results demonstrate that epoxy resin coatings reduce hydrogen embrittlement in X80 steel. Modified with selective CH 4 /H 2 permeability ionic liquids, the epoxy resin coating enhances methane and hydrogen competitive adsorption on the steel surface, improving hydrogen embrittlement resistance. This novel coating offers a viable solution for achieving safe and high ratio hydrogen blended transportation in natural gas pipeline.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Kejun Shi,Shu Xiao,Qingdong Ruan,Hao Wu,Guohua Chen,Chilou Zhou,Saihua Jiang,Ke Xi,Mohan He,Paul K. Chu
A method for in situ deposition of multi-layered graphene (MLG) coatings is demonstrated to mitigate hydrogen embrittlement of the X70 pipe steel. Carbon is implanted into the nickel catalytic layer pre-deposited by electroplating on the surface of the pipe steel, followed by annealing to segregate and form MLG. The MLG coatings are investigated systematically with respect to the surface morphology, phase structure, hydrogen resistance, corrosion resistance, and molecular dynamics simulation. In the stacked MLG structure, the in situ grown graphene layers interpenetrate each other to boost the coating adhesion and hydrogen resistance. Diffusion and the solid solution formed between the Ni coating and substrate improve the adhesion strength after annealing. The diffusion coefficient and permeability are reduced by 123 times and 48 times, respectively. Slow strain rate tests demonstrate outstanding resistance against hydrogen embrittlement because the MLG coatings inhibit hydrogen evolution, extend the diffusion path, decrease the permeation area, and enhance hydrogen adsorption. Moreover, electrochemical tests indicate that the MLG coatings have better corrosion resistance. These results reveal a viable strategy to use graphene to protect commercial steels from hydrogen embrittlement.
研究领域:
材料科学
·
工程学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Chenxi Wu,Huajun Lai,Feng Wang,Dianhui Wang,Weijiang Gan,Yulai She,Zhongmin Wang
V-based alloy membranes have huge potential for hydrogen separation and purification due to their higher hydrogen permeability , but suffer from hydrogen embrittlement . To address this matter, Pd and Fe have been chosen as alloying additions in V-based membranes to inhibit hydrogen embrittlement and maintain high hydrogen permeation performance based on the lattice-matching strategy. The phase structure, composition, microstructure and hydrogen permeation properties of V-Pd-Fe ternary alloy are investigated systematically, and the V-Fe and V-Pd binary alloys are presented for comparison. The results show that the prepared V-Pd-Fe ternary can match almost perfectly with pure V in lattice constants . Attributing to the lattice-matching strategy, the V-Pd-Fe ternary alloy exhibits more excellent hydrogen permeable properties than that of V-Fe and V-Pd binary alloys . The reduction of hydrogen embrittlement is ascribed to the lower hydrogen solubility that induced by the lattice distortion and electronegativity of Fe and Pd. Meanwhile, the manipulated lattice constant that parallel to pure V maintains high hydrogen permeation performance. Additionally, the designed ternary V 87.8 Pd 8 Fe 4.2 alloy exhibits exceptional long-term hydrogen permeation stability at 573 and 623 K, and hydrogen flux gradually decreases at 673 and 723 K is observed due to the interdiffusion between Pd film and V 87.8 Pd 8 Fe 4.2 substrate and defects in the Pd coating. This study offers new scenario and method for optimized hydrogen permeable properties and restrains hydrogen embrittlement in the alloy membrane.
研究领域:
材料科学
·
氢能与储能
·
金属膜分离技术
·
固态氢传输
·
合金设计
·
物理冶金学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）