Pub Date : 2024-08-09DOI: 10.1177/02670836241273483
Vijay T. Gaikwad, M. K. Mishra, Abhishek Tripathi, R. K. P. Singh
Effect of upset pressure on evolution of microstructure and mechanical properties for rotary friction welding of IN713LC superalloy and AISI 4140 steel have been investigated. Microstructure observation shows that with increasing upset pressure, grain refining effect of plastic deformation overrides grain growth effect of heat input, leading to finer prior austenite grains on AISI 4140 side. Dendritic structure of IN713LC transformed into fine equiaxed grains. Weld joints fabricated using low upset pressure showed unbonded regions with curved shape profile. However, weld joints made using high upset pressure showed nearly straight-line joint profile and was found to be favourable for adequate plastic deformation and achieving better bonding. Improvement in mechanical properties of weld joint was observed with increasing upset pressure.
{"title":"On the role of upset pressure during friction welding of IN713LC and AISI 4140","authors":"Vijay T. Gaikwad, M. K. Mishra, Abhishek Tripathi, R. K. P. Singh","doi":"10.1177/02670836241273483","DOIUrl":"https://doi.org/10.1177/02670836241273483","url":null,"abstract":"Effect of upset pressure on evolution of microstructure and mechanical properties for rotary friction welding of IN713LC superalloy and AISI 4140 steel have been investigated. Microstructure observation shows that with increasing upset pressure, grain refining effect of plastic deformation overrides grain growth effect of heat input, leading to finer prior austenite grains on AISI 4140 side. Dendritic structure of IN713LC transformed into fine equiaxed grains. Weld joints fabricated using low upset pressure showed unbonded regions with curved shape profile. However, weld joints made using high upset pressure showed nearly straight-line joint profile and was found to be favourable for adequate plastic deformation and achieving better bonding. Improvement in mechanical properties of weld joint was observed with increasing upset pressure.","PeriodicalId":18232,"journal":{"name":"Materials Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141924246","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-09DOI: 10.1177/02670836241273472
Huafeng Zhou, Wan Zhang, Zhihong Wu, Chunmei Li, Wang Huang, Jiawei Wang, Yuexin Pan, Zhishun Li
There is a problem that accelerator make the early compressive strength of mortar develop slowly. This study to utilize thickening agent and developed accelerator to improve the early compressive strength. The research findings demonstrated that with the addition of accelerator, a large amount of hydration products is formed in the paste. The dosage of PAH was 2%, the strength of the mortar reached 13.96 MPa at 1 d. The primary cause is that the PAH formed a granule-particle bridge structure, which made the structure of hydration products denser, thus improving the early compressive strength. It provides the value for the application of accelerator and thickener in the shotcrete field.
{"title":"Utilization of polyacrylamide-thickening agent and aluminum sulfate liquid accelerator for improving early strength of Portland cement","authors":"Huafeng Zhou, Wan Zhang, Zhihong Wu, Chunmei Li, Wang Huang, Jiawei Wang, Yuexin Pan, Zhishun Li","doi":"10.1177/02670836241273472","DOIUrl":"https://doi.org/10.1177/02670836241273472","url":null,"abstract":"There is a problem that accelerator make the early compressive strength of mortar develop slowly. This study to utilize thickening agent and developed accelerator to improve the early compressive strength. The research findings demonstrated that with the addition of accelerator, a large amount of hydration products is formed in the paste. The dosage of PAH was 2%, the strength of the mortar reached 13.96 MPa at 1 d. The primary cause is that the PAH formed a granule-particle bridge structure, which made the structure of hydration products denser, thus improving the early compressive strength. It provides the value for the application of accelerator and thickener in the shotcrete field.","PeriodicalId":18232,"journal":{"name":"Materials Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141921678","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-09DOI: 10.1177/02670836241273461
Kishore Sakthivel, Sumeet Mishra, Sourav Das
The article primarily concentrates on the extent of degeneration of microstructure of a carbide free bainitic steel while being exposed at high temperature vis-à-vis its effect on the mechanical properties. The as-received (AR) materials were exposed at different temperatures for a fixed duration and subsequently thoroughly characterized by employing several techniques suitable for microstructural and mechanical property evaluations. It was interesting to notice that both the amount of retained austenite as well as its C concentration were decreasing with higher temperature making it more unstable which could be reflected from the decreasing trend in the value of true strain that indicates the point of instability. It was observed that the dislocation annihilation coefficient ( k2) was increased while the corresponding storage coefficient ( k1) did not change much with the increase in exposure temperature compared to the AR sample.
文章主要关注无碳化物贝氏体钢在高温下暴露时微观结构的退化程度及其对机械性能的影响。在不同的温度下，按固定的时间对刚收到的 (AR) 材料进行暴露，然后采用适合微观结构和机械性能评估的多种技术对其进行全面表征。有趣的是，随着温度的升高，保留奥氏体的数量及其 C 浓度都在下降，这使得奥氏体变得更加不稳定，这可以从表示不稳定点的真实应变值的下降趋势中反映出来。据观察，与 AR 样品相比，位错湮灭系数（k2）随着暴露温度的升高而增大，而相应的存储系数（k1）则变化不大。
{"title":"Tensile deformation behavior of a thermally exposed carbide free bainitic steel","authors":"Kishore Sakthivel, Sumeet Mishra, Sourav Das","doi":"10.1177/02670836241273461","DOIUrl":"https://doi.org/10.1177/02670836241273461","url":null,"abstract":"The article primarily concentrates on the extent of degeneration of microstructure of a carbide free bainitic steel while being exposed at high temperature vis-à-vis its effect on the mechanical properties. The as-received (AR) materials were exposed at different temperatures for a fixed duration and subsequently thoroughly characterized by employing several techniques suitable for microstructural and mechanical property evaluations. It was interesting to notice that both the amount of retained austenite as well as its C concentration were decreasing with higher temperature making it more unstable which could be reflected from the decreasing trend in the value of true strain that indicates the point of instability. It was observed that the dislocation annihilation coefficient ( k2) was increased while the corresponding storage coefficient ( k1) did not change much with the increase in exposure temperature compared to the AR sample.","PeriodicalId":18232,"journal":{"name":"Materials Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141922093","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-08-08DOI: 10.1177/02670836241267265
H. Jamshidi Aval, Ivan Galvão
This study investigated the influence of the rotational speed of the tool with a cylindrical threaded pin on the microstructure, mechanical properties and corrosion resistance of the Al-16Si-4Cu-10SiC composite/Al-4Cu-Mg alloy joint. The results show tunnel defects are formed on the advancing side in the heat input less than 121 J/mm and more than 342 J/mm. With the increase of rotational speed from 800 to 1000 rpm, the silicon particle size and the aspect ratio have decreased and increased from 5.6 ± 1.2 to 3.5 ± 1.4 µm and 0.6 to 0.8, respectively. By decreasing rotational speed from 1000 to 800 rpm, the maximum hardness (152.3 ± 0.6 HV0.1), yield strength (383 ± 6 MPa), ultimate tensile strength (469 ± 9 MPa) and corrosion rate (1.03 mm/year) were achieved.
{"title":"Evaluation of tool rotational speed effect in Al-16Si-4Cu-10SiC composite/Al-4Cu-Mg alloy joint","authors":"H. Jamshidi Aval, Ivan Galvão","doi":"10.1177/02670836241267265","DOIUrl":"https://doi.org/10.1177/02670836241267265","url":null,"abstract":"This study investigated the influence of the rotational speed of the tool with a cylindrical threaded pin on the microstructure, mechanical properties and corrosion resistance of the Al-16Si-4Cu-10SiC composite/Al-4Cu-Mg alloy joint. The results show tunnel defects are formed on the advancing side in the heat input less than 121 J/mm and more than 342 J/mm. With the increase of rotational speed from 800 to 1000 rpm, the silicon particle size and the aspect ratio have decreased and increased from 5.6 ± 1.2 to 3.5 ± 1.4 µm and 0.6 to 0.8, respectively. By decreasing rotational speed from 1000 to 800 rpm, the maximum hardness (152.3 ± 0.6 HV0.1), yield strength (383 ± 6 MPa), ultimate tensile strength (469 ± 9 MPa) and corrosion rate (1.03 mm/year) were achieved.","PeriodicalId":18232,"journal":{"name":"Materials Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141928082","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
In this study, AZ31/6013 composite sheets were produced via hot roll bonding and annealed to investigate microstructural evolution and mechanical properties at the interface. Using scanning electron microscopy, energy-dispersive X-ray spectroscopy, electron backscatter diffraction, and transmission electron microscopy, interface microstructures were analyzed. Annealing at 400°C for 2 h resulted in the formation of two diffusion layers, each approximately 100 μm thick. The intermetallic compounds Al3Mg2 and Mg17Al12 exhibited elastic moduli of 68.649 GPa and 74.857 GPa, respectively, with Al3Mg2 demonstrating a higher average hardness (4.353 GPa compared to 4.157 GPa for Mg17Al12). Subsequent annealing at 200°C for 4 h led to improved tensile properties, achieving a peak strength of 176.7 MPa and an elongation of 19.1%.
{"title":"Effect of annealing on microstructure and tensile properties of AZ31/6013 composite sheets","authors":"Tianjian Wan, Rui Sun, Yunfei Ren, Jinghui Li, Mingya Zhang","doi":"10.1177/02670836241267264","DOIUrl":"https://doi.org/10.1177/02670836241267264","url":null,"abstract":"In this study, AZ31/6013 composite sheets were produced via hot roll bonding and annealed to investigate microstructural evolution and mechanical properties at the interface. Using scanning electron microscopy, energy-dispersive X-ray spectroscopy, electron backscatter diffraction, and transmission electron microscopy, interface microstructures were analyzed. Annealing at 400°C for 2 h resulted in the formation of two diffusion layers, each approximately 100 μm thick. The intermetallic compounds Al3Mg2 and Mg17Al12 exhibited elastic moduli of 68.649 GPa and 74.857 GPa, respectively, with Al3Mg2 demonstrating a higher average hardness (4.353 GPa compared to 4.157 GPa for Mg17Al12). Subsequent annealing at 200°C for 4 h led to improved tensile properties, achieving a peak strength of 176.7 MPa and an elongation of 19.1%.","PeriodicalId":18232,"journal":{"name":"Materials Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-08-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141927974","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-03DOI: 10.1177/02670836241256841
Q. Cai, Shishun Ye, Haiyang Sun, Ya-Xian Liao, Hui Chen
The heteroatom-doped graphene has attracted a lot of research due to its excellent physical, chemical and electrochemical properties considered to be the most promising electrocatalytic material for oxygen reduction reaction (ORR). Multi-doping can exert the synergistic effect between different doped heteroatoms and effectively improve the catalytic activity of doped graphene catalysts. N, P, S tri-doped graphene catalysts were prepared by simple and convenient hydrothermal and high-temperature treatment. The experimental results show that different phosphorus sources have a significant impact on the structure and performance of the prepared catalyst materials. The NSP-Gr-1 catalyst shows the high onset potential (1.035 V), half-wave potential (0.79 V) and limiting current density (−5.33 mA cm−2) for ORR. The power density of the zinc-air battery assembled with the NSP-Gr-1 catalyst achieves 163.1 mW cm−2 at 186.7 mA cm−2, which is much higher than the maximum power density of 140.0 mW cm−2 at 190 mA cm−2 for commercial Pt/C. The discharge stability under different current densities is outstanding.
掺杂杂原子的石墨烯具有优异的物理、化学和电化学性能，被认为是最有前途的氧还原反应（ORR）电催化材料，因此吸引了大量研究。多重掺杂可以发挥不同掺杂杂原子之间的协同效应，有效提高掺杂石墨烯催化剂的催化活性。通过简单方便的水热高温处理，制备了 N、P、S 三掺杂石墨烯催化剂。实验结果表明，不同磷源对所制备催化剂材料的结构和性能有显著影响。NSP-Gr-1 催化剂具有较高的起始电位（1.035 V）、半波电位（0.79 V）和 ORR 的极限电流密度（-5.33 mA cm-2）。使用 NSP-Gr-1 催化剂组装的锌-空气电池在 186.7 mA cm-2 时的功率密度达到 163.1 mW cm-2，远高于商用 Pt/C 在 190 mA cm-2 时的最大功率密度 140.0 mW cm-2。在不同电流密度下的放电稳定性也非常出色。
{"title":"N, S, P tri-doped porous graphene electrocatalyst with excellent oxygen reduction activity for zinc-air battery","authors":"Q. Cai, Shishun Ye, Haiyang Sun, Ya-Xian Liao, Hui Chen","doi":"10.1177/02670836241256841","DOIUrl":"https://doi.org/10.1177/02670836241256841","url":null,"abstract":"The heteroatom-doped graphene has attracted a lot of research due to its excellent physical, chemical and electrochemical properties considered to be the most promising electrocatalytic material for oxygen reduction reaction (ORR). Multi-doping can exert the synergistic effect between different doped heteroatoms and effectively improve the catalytic activity of doped graphene catalysts. N, P, S tri-doped graphene catalysts were prepared by simple and convenient hydrothermal and high-temperature treatment. The experimental results show that different phosphorus sources have a significant impact on the structure and performance of the prepared catalyst materials. The NSP-Gr-1 catalyst shows the high onset potential (1.035 V), half-wave potential (0.79 V) and limiting current density (−5.33 mA cm−2) for ORR. The power density of the zinc-air battery assembled with the NSP-Gr-1 catalyst achieves 163.1 mW cm−2 at 186.7 mA cm−2, which is much higher than the maximum power density of 140.0 mW cm−2 at 190 mA cm−2 for commercial Pt/C. The discharge stability under different current densities is outstanding.","PeriodicalId":18232,"journal":{"name":"Materials Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141271107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-06-02DOI: 10.1177/02670836241255240
Pengchun Li, Yuzhou Du, Min Zhang, Qian Yang, Chen Liu, Xin Wang, Ruochen Zhang, Bailing Jiang
Hardness serves as a crucial indicator for assessing the success of quenching treatment in the steel and iron industry, impacting the processability and wear properties of materials. In the present study, a dataset comprising 125 hardness values of the QT500-7 sample subjected to various austempering heat treatment parameters was utilised to train a neural network model for predicting the hardness of austempered ductile iron (ADI). The established model based on a genetic algorithm and error backpropagation algorithm demonstrates high accuracy in predicting the hardness of ADI if given heat treatment parameters. The mean square error of the model was about 1.019, indicating the reliability and precision of the model in predicting the hardness of ADI based on the specified heat treatment parameters.
在钢铁工业中，硬度是评估淬火处理成功与否的重要指标，影响着材料的加工性能和磨损性能。在本研究中，利用由 125 个经过不同奥氏体回火热处理参数处理的 QT500-7 样品硬度值组成的数据集，训练了一个预测奥氏体回火球墨铸铁 (ADI) 硬度的神经网络模型。在给定热处理参数的情况下，基于遗传算法和误差反向传播算法建立的模型在预测 ADI 硬度方面表现出很高的准确性。该模型的均方误差约为 1.019，表明该模型在根据指定的热处理参数预测 ADI 硬度方面的可靠性和精确性。
{"title":"Genetic algorithm (GA)–backpropagation (BP) network approach for hardness prediction of austempered ductile iron (ADI)","authors":"Pengchun Li, Yuzhou Du, Min Zhang, Qian Yang, Chen Liu, Xin Wang, Ruochen Zhang, Bailing Jiang","doi":"10.1177/02670836241255240","DOIUrl":"https://doi.org/10.1177/02670836241255240","url":null,"abstract":"Hardness serves as a crucial indicator for assessing the success of quenching treatment in the steel and iron industry, impacting the processability and wear properties of materials. In the present study, a dataset comprising 125 hardness values of the QT500-7 sample subjected to various austempering heat treatment parameters was utilised to train a neural network model for predicting the hardness of austempered ductile iron (ADI). The established model based on a genetic algorithm and error backpropagation algorithm demonstrates high accuracy in predicting the hardness of ADI if given heat treatment parameters. The mean square error of the model was about 1.019, indicating the reliability and precision of the model in predicting the hardness of ADI based on the specified heat treatment parameters.","PeriodicalId":18232,"journal":{"name":"Materials Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141273656","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
93W–4.6Ni–2.1Fe–0.3Co alloys reinforced by ZrC particles were prepared by the two-step sintering method in this article. The conventional sintering process conducted at a temperature of 1485 °C resulted in the formation of microvoids between the larger dispersed particles and the matrix, thereby leading to a degradation in the tensile property (959 MPa/11.5%). Through controlling the sintering temperature at 1440 °C, a dispersion-strengthened tungsten heavy alloys (WHAs) with excellent comprehensive tensile properties (974 MPa/27.0%) was obtained, mainly attributed to the synergistic effect of homogeneous dispersion strengthening and grain boundary purification. Under high compressive strain rates, dispersion-strengthened WHA demonstrates a superior yield strength compared to WHA, suggesting that dispersion-strengthened WHAs have potential applications in the armour-piercing field.
{"title":"Effect of dispersed particles on microstructure evolution and mechanical properties of 93W–4.6Ni–2.1Fe–0.3Co alloys","authors":"Mingming Wang, Lijun Cao, Boyu Jiang, Ziming Chen, Liukui Gong, Jinqi Ruan, Lixun Deng, Wei Huang","doi":"10.1177/02670836241256189","DOIUrl":"https://doi.org/10.1177/02670836241256189","url":null,"abstract":"93W–4.6Ni–2.1Fe–0.3Co alloys reinforced by ZrC particles were prepared by the two-step sintering method in this article. The conventional sintering process conducted at a temperature of 1485 °C resulted in the formation of microvoids between the larger dispersed particles and the matrix, thereby leading to a degradation in the tensile property (959 MPa/11.5%). Through controlling the sintering temperature at 1440 °C, a dispersion-strengthened tungsten heavy alloys (WHAs) with excellent comprehensive tensile properties (974 MPa/27.0%) was obtained, mainly attributed to the synergistic effect of homogeneous dispersion strengthening and grain boundary purification. Under high compressive strain rates, dispersion-strengthened WHA demonstrates a superior yield strength compared to WHA, suggesting that dispersion-strengthened WHAs have potential applications in the armour-piercing field.","PeriodicalId":18232,"journal":{"name":"Materials Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141101239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-21DOI: 10.1177/02670836241253174
Shalvi S, Varsha Gautam, Suman Nagpal, K. Verma, V. K. Jain, Avshish Kumar
In the present study, we present a unique sensing platform relies on a silicon nanowire (SiNW) and reduced graphene oxide (rGO) hybrid nanostructure capped with (3-aminopropyl) triethoxysilane (APTES) and polyethylene glycol gold nanoparticle (PEG-AuNPs). Herein, MACE technique was applied to synthesize SiNWs, which was then used to develop a sandwich hybrid nanostructure by casting of rGO/APTES/PEG-AuNPs on its surface under room temperature and was characterised using various techniques. The developed PEG-AuNPs/rGO@APTES/SiNWs hybrid nanostructure-based sensing platform was used to detect two types of arsenic, that is, arsenite (As3+) and arsenate (As5+) using cyclic voltammetry in a sensitive and selective manner wherein the presence of arsenic species in real sample (blood) as well as standard samples was recorded.
{"title":"Development of SiNWs based electrochemical sensor for trace level detection of arsenic","authors":"Shalvi S, Varsha Gautam, Suman Nagpal, K. Verma, V. K. Jain, Avshish Kumar","doi":"10.1177/02670836241253174","DOIUrl":"https://doi.org/10.1177/02670836241253174","url":null,"abstract":"In the present study, we present a unique sensing platform relies on a silicon nanowire (SiNW) and reduced graphene oxide (rGO) hybrid nanostructure capped with (3-aminopropyl) triethoxysilane (APTES) and polyethylene glycol gold nanoparticle (PEG-AuNPs). Herein, MACE technique was applied to synthesize SiNWs, which was then used to develop a sandwich hybrid nanostructure by casting of rGO/APTES/PEG-AuNPs on its surface under room temperature and was characterised using various techniques. The developed PEG-AuNPs/rGO@APTES/SiNWs hybrid nanostructure-based sensing platform was used to detect two types of arsenic, that is, arsenite (As3+) and arsenate (As5+) using cyclic voltammetry in a sensitive and selective manner wherein the presence of arsenic species in real sample (blood) as well as standard samples was recorded.","PeriodicalId":18232,"journal":{"name":"Materials Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141117025","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-20DOI: 10.1177/02670836241253761
Shuai Zhang, Zhenqiang Wang, Zepeng Zha, Dongshen Huo, F. Jiang
Achieving the development of ultra-light Al–Li alloys with high strength and excellent corrosion resistance is always a challenge. In this study, the precipitation characteristics and electrochemical corrosion behaviours after isothermal aging of cast Al–Li alloys with two different Li contents were comparatively analysed. The results showed that the increase in Li content from 0.7 wt-% to 1.3 wt-% retarded the peak hardening and improved the Al–Li alloy hardness and strength by promoting the precipitation of the S′ (Al2CuMg) and T1 (Al2CuLi) phases. Besides, the galvanic coupling corrosion of the alloying element Cu with the aluminium matrix was reduced by more Li addition, thus improving the corrosion resistance of the alloy.
{"title":"The precipitation and corrosion behaviour of cast Al–Mg–(0.7, 1.3) Li–Cu alloys","authors":"Shuai Zhang, Zhenqiang Wang, Zepeng Zha, Dongshen Huo, F. Jiang","doi":"10.1177/02670836241253761","DOIUrl":"https://doi.org/10.1177/02670836241253761","url":null,"abstract":"Achieving the development of ultra-light Al–Li alloys with high strength and excellent corrosion resistance is always a challenge. In this study, the precipitation characteristics and electrochemical corrosion behaviours after isothermal aging of cast Al–Li alloys with two different Li contents were comparatively analysed. The results showed that the increase in Li content from 0.7 wt-% to 1.3 wt-% retarded the peak hardening and improved the Al–Li alloy hardness and strength by promoting the precipitation of the S′ (Al2CuMg) and T1 (Al2CuLi) phases. Besides, the galvanic coupling corrosion of the alloying element Cu with the aluminium matrix was reduced by more Li addition, thus improving the corrosion resistance of the alloy.","PeriodicalId":18232,"journal":{"name":"Materials Science and Technology","volume":null,"pages":null},"PeriodicalIF":1.8,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141119111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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