MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
·
2022
·
IF 6.044
Shu Miao,Yunqiang Zhao,Zhuoming Xie,Longfei Zeng,Yan Lin
Ductilization and suppression of annealing-induced embrittlement have become the critical premises for various structural applications of high-strength tungsten materials but have yielded few practical advances. Here, we successfully fabricated W–Re and nano-particle doped W-Re-ZrC alloys with a combination of desirable ductility and a high tensile strength above 1.3 GPa by powder metallurgy plus hot swaging. Specifically, the W–Re and W-Re-ZrC alloys exhibit total elongations of 31.6% and 16.1%, respectively, at room temperature. Upon high-temperature annealing at 1600 °C, the W-Re-ZrC alloy still retains a high total elongation of 12.9% and a high tensile strength of over 1.3 GPa, unlike the W–Re alloy, which exhibits substantial losses of ductility and strength. Microstructure analysis reveals that a large amount of low-angle grain boundaries and high-density mobile dislocations are responsible for ductilization. Meanwhile, ZrC nano-particles stabilize low-angle grain boundaries and dislocation structures at elevated temperatures, suppressing annealing-induced embrittlement in the W-Re-ZrC alloy. The present work provides a promising methodology for manufacturing bulk high-strength tungsten materials with favorable room-temperature ductility and high resistance to catastrophic failure during long-term service.
研究领域:
材料科学
·
冶金工程
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2022
·
IF 8.035
An Chen,Bo Wu,Lan Li,Ting You,Jun Wang,Jinpeng Shen,Chonghua Pei
Aluminum (Al) powder has been widely used in solid composite propellants (SCPs) due to its high energy density and appropriate combustion kinetics. However, the presence of a passivation shell (Al 2 O 3 ) on the surface of Al would reduce its reactivity and heat release. Herein, a facile ‘one-step’ modification method was proposed for the fabrication of micron-sized Al substitutes in SCP, aiming to induce the involvement of Al cores in the reaction by letting the liquid metal embrittlement (LME) damage the homogeneous Al 2 O 3 shell. Oxidation weight gain experiments in the air atmosphere were conducted to investigate the effect of liquid metal content on the breakthrough of the Al 2 O 3 shell to improve ignition and combustion performance. Moreover, the composites with gallium-based liquid metal (Galinstan) addition of 3 wt% exhibited the largest oxidation weight gain and oxidation weight gain rates, which were approximately 6 and 8-fold higher than that of the raw-Al particles, respectively. Furthermore, the resulting Galinstan-modified aluminum-based powder (GLM-Al) was used as a metal fuel for the formulation of SCP to validate its thermal and combustion properties. According to the DSC results, the heat release of SCP-2 containing GLM-Al was 3321 J·g −1 , which is 1.42 folds of that from the reference SCP-1(2341 J∙g −1 ). Furthermore, SCP-2 exhibited a 12 % increase in burning rate under 0.1 MPa air atmosphere and a much higher pressurization rate (5.4 MPa·s −1 ) than that of SCP-1 (2.6 MPa·s −1 ) under 1 MPa argon atmosphere. The resulting condensed combustion product (CCP) size of SCP-2 is much smaller than that of SCP-1.
研究领域:
材料科学
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燃烧与推进
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2023
·
IF 4.7
Yutuo Wang,Yintao Li,Zhengquan Zhang,Mengqing Xiao,Changwen Chen,Yuanlin Zhou,Shanqiang Wang
Nuclear facilities generate lots of contaminated stainless steel metallic material during maintenance and decommissioning. As a new radioactive decontamination method, the self-embrittle decontamination method has the advantage of less secondary contaminants and being able to operate machinery remotely. Adding a certain amount of corrosive components to the self-embrittle compound detergent can achieve the dual functions of self-embrittlement and corrosive decontamination. It was used to optimized the response surface methodology (RSM) and train and evaluate four different machine learning models by the recorded data set. The purpose of the analysis was to quantify the accuracy of the corrosion decontamination effect of RSM model and four types of machine learning model. The results exhibits that the long short-term memory neural network (LSTM) model performs well. The prepared detergent can achieve the average corrosion depth of 5.9454 μm on stainless steel, which can satisfy the corrosion decontamination of radioactively contaminated stainless steel surfaces.
研究领域:
材料科学
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核工程
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化学工程
·
人工智能
✓ 已验证
DOI
高影响因子
CORROSION SCIENCE
·
2022
·
IF 7.72
Xin Du,Shaoqiang Guo,Sheng Wang
Fission product tellurium causes severe embrittlement of nickel alloys in nuclear molten fuel salt systems. This paper investigates the tellurium chemistry in molten LiCl-KCl-Li 2 Te salts and the tellurium reactions at the alloy interface. The reactions for the two-step reduction of Te 0 and the electrochemical formation of nickel tellurides have been identified from cyclic voltammograms. The corrosion of UNS N10003 alloy with different tellurium salt chemistries and applied potentials found that tellurium corrosion attack is only present at potentials more positive than the Ni 1.43 Te / Te 2 − potential. The critical potential is thus suggested for mitigating tellurium embrittlement using the redox control technique.
研究领域:
材料科学
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核工程
·
电化学
✓ 已验证
DOI
高影响因子
Coatings
·
2025
·Vol. 15
·期 5
·518
·
IF 2.8
Ke Cai,Bailing Jiang
How to solve hydrogen embrittlement (HE) is a key issue that urgently needs to be addressed in the hydrogen energy industry. The use of hydrogen barrier coatings can effectively reduce the occurrence of HE. In this article, we utilized the epoxy resin (ER) as the base coating and the graphene (GN) and the silicon carbide (SiC) as the additives to prepare the (GN-ER)/(SiC-ER)/(GN-ER) sandwich structure composite hydrogen barrier coatings by the spin coating method and investigated the effect of coating composite ways on the hydrogen barrier performance. The GN-ER and the SiC-ER are used as the hydrogen barrier layer and the hydrogen capture layer, respectively, in order to improve the hydrogen barrier performances jointly. The XRD and the SEM were used to characterize their phase compositions and microstructures, and the hydrogen barrier performances were analyzed by the electrochemical hydrogen permeation curves. The adhesive strength was characterized through the pull-out method. Compared to the single-layer and the double-layer structures, sandwich structures can effectively enhance the hydrogen barrier performance of the coatings, such as the relatively low electrochemical hydrogen diffusion coefficient (Dt, 3.88 × 10−8cm2·s−1), the relatively high permeation reduction factor (PRF, 59) and adhesive strength (10.9 MPa). This research may provide a theoretical basis for improving the hydrogen barrier performance of coatings. The (GN-ER)/(SiC ER)/(GN-ER) sandwich structures composite hydrogen barrier coatings can be expected to be used in the field of safe hydrogen storage and transportation.
研究领域:
材料科学
·
表面工程
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氢能技术
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腐蚀防护
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高分子复合材料
✓ 已验证
DOI
高影响因子
Food Frontiers
·
2024
·
IF 7.4
Mi Tang,Ting Shao,Liang Ma,Hongjie Dai,Yu Yong,Xin Feng,Yuhao Zhang
Feeding faba beans to freshwater fish could crisp its muscle texture to avoid softening. However, the dynamic crisping mechanism was unclear. Herein, a 120-day feeding trial was conducted to systemically investigate the textural crisping mechanism of crisp grass carp (CGC) via molecular-level, gene/protein expression analysis. In the early crisping stage (0–30 days), the total antioxidant capacity significantly decreased (by 16.79%), TUNEL staining and qRT-PCR results revealed that apoptosis occurred, which was induced by oxidative stress validating by proteomics. Meanwhile, the content of dityrosine and hydroxylysyl pyridinoline rose, thereby substantially increasing the hardness and chewiness of CGC by 37.51% and 40.84%, respectively. With further crisping (30–90 days), Masson staining exhibited collagen gradually filling the gap between myofibrils, the content and cross-linking degree of collagen further increased, finally elevating the hardness and chewiness of CGC. This study laid a theoretical foundation for producing and supplying aquatic raw materials with different texture characteristics.
研究领域:
水产养殖
·
食品科学
·
分子生物学
·
蛋白质组学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）