Pub Date : 2025-02-28DOI: 10.1016/j.jmst.2025.01.018
Zikuan Xu, Peng Wang, Peng Zhang, Bin Wang, Yang Liu, Yikun Luan, Pei Wang, Dianzhong Li, Zhefeng Zhang
With the increasing demand for high-performance metallic materials, the improvement of fatigue strength (FS) has become a crucial issue. This study focuses on the AISI 52100 steel, a material with leading fatigue performance and low-cost raw material, aiming to further improve its FS. It is found that the fatigue damage mechanism of 52100 steels with different tensile strengths has undergone significant changes, and the inclusions, mainly nitride and oxide, are key factors limiting the further improvement of FS. Therefore, the size reduction and modification of inclusions were attempted through the rare earth addition and strict control of harmful elements. Combining targeted microstructure adjustment, the FS of the 52100 steel has been further enhanced to ∼1.6 GPa, exceeding that of other metallic materials (performed in uniaxial tension with a stress ratio of R = 0.1), and thus establishing it as a standout for its exceptional performance-to-cost ratio. By clarifying the influences of different types of inclusions on fatigue performance and establishing the correlation between micro-hardness (or strength) and FS, an optimization strategy for FS improvement of the 52100 steel was proposed. The FS has been improved by approximately 187 MPa at most by implementing this strategy. These achievements provide feasible technical approaches and theoretical foundations for the anti-fatigue design of metallic materials.
{"title":"Fatigue strength optimization of high-strength steels by precisely controlling microstructure and inclusions","authors":"Zikuan Xu, Peng Wang, Peng Zhang, Bin Wang, Yang Liu, Yikun Luan, Pei Wang, Dianzhong Li, Zhefeng Zhang","doi":"10.1016/j.jmst.2025.01.018","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.01.018","url":null,"abstract":"With the increasing demand for high-performance metallic materials, the improvement of fatigue strength (FS) has become a crucial issue. This study focuses on the AISI 52100 steel, a material with leading fatigue performance and low-cost raw material, aiming to further improve its FS. It is found that the fatigue damage mechanism of 52100 steels with different tensile strengths has undergone significant changes, and the inclusions, mainly nitride and oxide, are key factors limiting the further improvement of FS. Therefore, the size reduction and modification of inclusions were attempted through the rare earth addition and strict control of harmful elements. Combining targeted microstructure adjustment, the FS of the 52100 steel has been further enhanced to ∼1.6 GPa, exceeding that of other metallic materials (performed in uniaxial tension with a stress ratio of <em>R</em> = 0.1), and thus establishing it as a standout for its exceptional performance-to-cost ratio. By clarifying the influences of different types of inclusions on fatigue performance and establishing the correlation between micro-hardness (or strength) and FS, an optimization strategy for FS improvement of the 52100 steel was proposed. The FS has been improved by approximately 187 MPa at most by implementing this strategy. These achievements provide feasible technical approaches and theoretical foundations for the anti-fatigue design of metallic materials.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"22 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526535","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2025-02-28DOI: 10.1016/j.jmst.2025.01.023
Qing Cheng, Fusheng Tan, Prajna Paramita Mohapatra, Wenquan Ming, Jun Ding, Qingyang Gao, Mingwei Chen, Jianghua Chen, Xiandong Xu, En Ma
Upon ageing of a deformed metal, compositional segregation to dislocations and stacking faults is well known to elevate strength. However, Suzuki segregation effects typically result in a modest strength increase on the order of 10 MPa for many substitutional face-centered-cubic solid solutions. Severe pre-deformation can lead to significant hardening but often at the cost of substantial tensile ductility after subsequent aging. Here we propose a novel strategy to improve the Suzuki hardening effect in a single-phase CoCrNi alloy by meticulously controlling repetitive straining and annealing conditions without compromising ductility. Our findings revealed that multiple stages of annealing along the way of pre-straining significantly increase the fraction of dislocations that trap partitioning species (i.e. Cr), far exceeding the levels achievable through single-shot annealing after straight pre-deformation to the same accumulative strain (40%). Thermodynamically, the segregation of Cr into stacking faults is driven by reduced local stacking fault energy (SEF) and system energy. The decreased SFE inhibits dislocation cross-slip, promotes partial dislocation nucleation, and facilitates dislocation intersection, leading to a high density of extended stacking fault ribbons in the multi-pass strained and annealed samples. As a result, the yield strength increments of multi-pass treated samples (75 ± 10 MPa) are four times higher than those of single-pass treated samples (18 ± 8 MPa), while retaining an adequate strain hardening rate, thus preserving tensile ductility despite of plastic flow at higher stresses. Our strategy shows promise for broader applications, particularly in scenarios where conventional thermomechanical treatments fail to yield satisfactory results.
{"title":"Amplifying Suzuki segregation and hardening in a concentrated solid solution alloy","authors":"Qing Cheng, Fusheng Tan, Prajna Paramita Mohapatra, Wenquan Ming, Jun Ding, Qingyang Gao, Mingwei Chen, Jianghua Chen, Xiandong Xu, En Ma","doi":"10.1016/j.jmst.2025.01.023","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.01.023","url":null,"abstract":"Upon ageing of a deformed metal, compositional segregation to dislocations and stacking faults is well known to elevate strength. However, Suzuki segregation effects typically result in a modest strength increase on the order of 10 MPa for many substitutional face-centered-cubic solid solutions. Severe pre-deformation can lead to significant hardening but often at the cost of substantial tensile ductility after subsequent aging. Here we propose a novel strategy to improve the Suzuki hardening effect in a single-phase CoCrNi alloy by meticulously controlling repetitive straining and annealing conditions without compromising ductility. Our findings revealed that multiple stages of annealing along the way of pre-straining significantly increase the fraction of dislocations that trap partitioning species (i.e. Cr), far exceeding the levels achievable through single-shot annealing after straight pre-deformation to the same accumulative strain (40%). Thermodynamically, the segregation of Cr into stacking faults is driven by reduced local stacking fault energy (SEF) and system energy. The decreased SFE inhibits dislocation cross-slip, promotes partial dislocation nucleation, and facilitates dislocation intersection, leading to a high density of extended stacking fault ribbons in the multi-pass strained and annealed samples. As a result, the yield strength increments of multi-pass treated samples (75 ± 10 MPa) are four times higher than those of single-pass treated samples (18 ± 8 MPa), while retaining an adequate strain hardening rate, thus preserving tensile ductility despite of plastic flow at higher stresses. Our strategy shows promise for broader applications, particularly in scenarios where conventional thermomechanical treatments fail to yield satisfactory results.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"7 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143526538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2025-02-27DOI: 10.1016/j.jmst.2024.12.070
Xixun Hao, Wu Lan, Di Li, Chuanfu Liu
The vigorous development of modern electronic communication demands multi-functional materials with exceptional electromagnetic interference (EMI) shielding. However, constructing lightweight and highly efficient metal-free carbon-based EMI shielding materials remains a huge challenge, particularly with robust EMI responses across a broadband frequency. Herein, a broadband (8–27 GHz) and strong EMI shielding response nitrogen-doped carbon plate (NCP) is constructed by a pressing and two-step pyrolysis process. The layered stacking structure and N-doping impart extraordinary EMI shielding performance to the carbon plate, achieving EMI shielding effectiveness values of 82.60, 95.44, and 104.12 dB in the X band, Ku band, and K band, respectively. Notably, the overall thickness of NCP was less than 1 mm. Moreover, the NCP exhibits remarkable joule heating performance with a low driving voltage (≤3 V) and a fast electrothermal response. This work enables the potential for the development of metal-free carbon materials with lightweight, highly efficient and broadband-strong EMI shielding performance.
{"title":"Efficient N-doped carbon plate for high-performance broadband-frequency electromagnetic interference shielding and electric heating management","authors":"Xixun Hao, Wu Lan, Di Li, Chuanfu Liu","doi":"10.1016/j.jmst.2024.12.070","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.070","url":null,"abstract":"The vigorous development of modern electronic communication demands multi-functional materials with exceptional electromagnetic interference (EMI) shielding. However, constructing lightweight and highly efficient metal-free carbon-based EMI shielding materials remains a huge challenge, particularly with robust EMI responses across a broadband frequency. Herein, a broadband (8–27 GHz) and strong EMI shielding response nitrogen-doped carbon plate (NCP) is constructed by a pressing and two-step pyrolysis process. The layered stacking structure and N-doping impart extraordinary EMI shielding performance to the carbon plate, achieving EMI shielding effectiveness values of 82.60, 95.44, and 104.12 dB in the X band, Ku band, and K band, respectively. Notably, the overall thickness of NCP was less than 1 mm. Moreover, the NCP exhibits remarkable joule heating performance with a low driving voltage (≤3 V) and a fast electrothermal response. This work enables the potential for the development of metal-free carbon materials with lightweight, highly efficient and broadband-strong EMI shielding performance.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"7 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143518089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2025-02-27DOI: 10.1016/j.jmst.2025.01.022
Jun He, Haoran Qian, Guodong Peng, Hongyu Hu, Li Jiang, Xiaojun He
It is a big challenge to tune the structure and composition of carbon-based anode materials to increase the active sites by a green synthesis strategy for potassium ion batteries (PIBs). Herein, the N/F/S co-doped three-dimensional (3D) interconnected carbon nanosheets (NFS-CNSs) were synthesized from coal tar pitch (CTP) through a green and low-temperature treatment process for the first time. The as-obtained NFS-CNS600 features 3D interconnected ultra-thin carbon nanosheets with abundant active sites, tunable N/F/S species, and enlarged carbon interlayer spacing. The density functional theory calculation results demonstrate that NFS-CNSs exhibit the highest electron density and most negative K+ adsorption energy (–0.59 eV) compared to single or double-atom doping, thereby enhancing the storage performance of K+. As an anode for PIBs, the NFS-CNS600 exhibits good cycle stability (98.2% capacity retention after 200 cycles at 0.2 A g−1), high capacity (409.1 mAh g−1 at 0.05 A g−1) and rate performance (179.5 mAh g−1 at 5 A g−1). Besides, the NFS-CNS600 anode also displays outstanding sodium storage performance. This work offers a green strategy to synthesize CTP-based anode materials from coal chemical by-products for high-performance PIBs.
{"title":"N/F/S co-doped 3D interconnected carbon nanosheets with well-developed pores and interlayer spacing for high-performance potassium ion batteries","authors":"Jun He, Haoran Qian, Guodong Peng, Hongyu Hu, Li Jiang, Xiaojun He","doi":"10.1016/j.jmst.2025.01.022","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.01.022","url":null,"abstract":"It is a big challenge to tune the structure and composition of carbon-based anode materials to increase the active sites by a green synthesis strategy for potassium ion batteries (PIBs). Herein, the N/F/S co-doped three-dimensional (3D) interconnected carbon nanosheets (NFS-CNSs) were synthesized from coal tar pitch (CTP) through a green and low-temperature treatment process for the first time. The as-obtained NFS-CNS<sub>600</sub> features 3D interconnected ultra-thin carbon nanosheets with abundant active sites, tunable N/F/S species, and enlarged carbon interlayer spacing. The density functional theory calculation results demonstrate that NFS-CNSs exhibit the highest electron density and most negative K<sup>+</sup> adsorption energy (–0.59 eV) compared to single or double-atom doping, thereby enhancing the storage performance of K<sup>+</sup>. As an anode for PIBs, the NFS-CNS<sub>600</sub> exhibits good cycle stability (98.2% capacity retention after 200 cycles at 0.2 A g<sup>−1</sup>), high capacity (409.1 mAh g<sup>−1</sup> at 0.05 A g<sup>−1</sup>) and rate performance (179.5 mAh g<sup>−1</sup> at 5 A g<sup>−1</sup>). Besides, the NFS-CNS<sub>600</sub> anode also displays outstanding sodium storage performance. This work offers a green strategy to synthesize CTP-based anode materials from coal chemical by-products for high-performance PIBs.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"27 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143507132","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2025-02-26DOI: 10.1016/j.jmst.2025.02.005
Seul-Yi Lee, Nicole Sim, Jagadis Gautam, Young-Teck Kim, Soo-Jin Park, Ji Hoon Lee
Nitrogen-doped carbon quantum dots (N-CQDs), synthesized via the rapid pyrolysis of ammonium citrate dibasic and ethylenediamine dihydrochloride, demonstrate remarkable chemiluminescence capabilities, emitting a vibrant blue-green light in peroxyoxalate chemiluminescence (PO-CL) reactions. Among these, a distinct variant of N-CQDs is an exceptionally sensitive biosensor, facilitating the swift detection of copper ions (Cu2+) within human plasma and urine samples. Upon rapid binding of N-CQDs and Cu2+, non-emissive complex forms due to intra-chemiluminescence resonance energy transfer (intra-CRET) initiated by the PO-CL reaction. Consequently, the brightness of the biosensor diminishes proportionally with increasing Cu2+ concentrations in human samples. Featuring a low sensing limit of 19.5 nM and an expansive dynamic range spanning from 0.05 to 3.8 µM, this biosensor empowers the rapid and precise quantification of trace Cu2+ levels with exceptional accuracy and recovery rates. In alignment with copper quantification guidelines set forth by the Environmental Protection Agency (EPA) and the National Institutes of Health (NIH), this selective biosensor stands as a cutting-edge monitoring tool, poised to advance analytical capabilities in various fields.
{"title":"Enhanced carbon quantum dots-based chemiluminescence probes for copper ion detection in human plasma and urine","authors":"Seul-Yi Lee, Nicole Sim, Jagadis Gautam, Young-Teck Kim, Soo-Jin Park, Ji Hoon Lee","doi":"10.1016/j.jmst.2025.02.005","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.02.005","url":null,"abstract":"Nitrogen-doped carbon quantum dots (N-CQDs), synthesized <em>via</em> the rapid pyrolysis of ammonium citrate dibasic and ethylenediamine dihydrochloride, demonstrate remarkable chemiluminescence capabilities, emitting a vibrant blue-green light in peroxyoxalate chemiluminescence (PO-CL) reactions. Among these, a distinct variant of N-CQDs is an exceptionally sensitive biosensor, facilitating the swift detection of copper ions (Cu<sup>2+</sup>) within human plasma and urine samples. Upon rapid binding of N-CQDs and Cu<sup>2+</sup>, non-emissive complex forms due to intra-chemiluminescence resonance energy transfer (intra-CRET) initiated by the PO-CL reaction. Consequently, the brightness of the biosensor diminishes proportionally with increasing Cu<sup>2+</sup> concentrations in human samples. Featuring a low sensing limit of 19.5 nM and an expansive dynamic range spanning from 0.05 to 3.8 µM, this biosensor empowers the rapid and precise quantification of trace Cu<sup>2+</sup> levels with exceptional accuracy and recovery rates. In alignment with copper quantification guidelines set forth by the Environmental Protection Agency (EPA) and the National Institutes of Health (NIH), this selective biosensor stands as a cutting-edge monitoring tool, poised to advance analytical capabilities in various fields.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"1 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495880","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2025-02-26DOI: 10.1016/j.jmst.2024.12.068
Guohai Chen, Kazufumi Kobashi, Don N. Futaba
Carbon nanotubes (CNTs) hold immense promise for a wide array of applications due to their exceptional physical and chemical properties. Understanding and controlling their structural characteristics, particularly the diameter and number of walls, is crucial for harnessing their full potential. We investigated the relationship between these parameters for both commercially available and lab-scale CNTs, spanning a wide range of outer diameters (1–13 nm) and numbers of walls (1–13). Our findings revealed a commonality among the structural diversity, rather than a random distribution, as evidenced by a piecewise linear relationship between the outer diameter and number of walls, with an inflection point occurring at approximately 4 nm in diameter. This observation is unexpected, as the CNTs were synthesized using different approaches and growth conditions; yet, as a group, they exhibit a “structural scaling”. Additionally, we made an intriguing observation: despite increases in outer diameter and number of walls, the inner diameters remained relatively constant (4–5 nm) for thicker CNTs with more than three walls. These results suggest that structural properties can be estimated based on diameter, which not only advances our fundamental understanding of CNT synthesis but also provides practical insights for tailoring CNT properties for various applications.
{"title":"Unexpected structural scaling and predictability in carbon nanotubes","authors":"Guohai Chen, Kazufumi Kobashi, Don N. Futaba","doi":"10.1016/j.jmst.2024.12.068","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.068","url":null,"abstract":"Carbon nanotubes (CNTs) hold immense promise for a wide array of applications due to their exceptional physical and chemical properties. Understanding and controlling their structural characteristics, particularly the diameter and number of walls, is crucial for harnessing their full potential. We investigated the relationship between these parameters for both commercially available and lab-scale CNTs, spanning a wide range of outer diameters (1–13 nm) and numbers of walls (1–13). Our findings revealed a commonality among the structural diversity, rather than a random distribution, as evidenced by a piecewise linear relationship between the outer diameter and number of walls, with an inflection point occurring at approximately 4 nm in diameter. This observation is unexpected, as the CNTs were synthesized using different approaches and growth conditions; yet, as a group, they exhibit a “structural scaling”. Additionally, we made an intriguing observation: despite increases in outer diameter and number of walls, the inner diameters remained relatively constant (4–5 nm) for thicker CNTs with more than three walls. These results suggest that structural properties can be estimated based on diameter, which not only advances our fundamental understanding of CNT synthesis but also provides practical insights for tailoring CNT properties for various applications.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"51 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143507176","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
We report a systematic study on the transport properties of (Bi0.2Sb0.8)2Te3 and (Bi0.4Sb0.6)2Te3 nanoplates with a thickness of about 6 nm grown by chemical vapor deposition (CVD) on Si/SiO2 substrate. We achieve a significant ambipolar field effect in the two samples with different compositions by applying back-gate voltage, successfully tuning the Fermi level across the Dirac point of surface states. It is found that the Hall resistance exhibits strong non-linear behavior and magnetic field induced sign change of the slope when the Fermi level is near the Dirac point, indicating the coexistence of n-type and p-type carriers. Moreover, this coincides with the striking crossover from weak antilocalization (WAL) to linear magnetoresistance (LMR). These gate and temperature dependent magneto-transport studies provide a deeper insight into the nature of LMR and WAL in topological materials.
{"title":"Linear magnetoresistance, weak antilocalization and electron-hole coexistence in gate tunable topological insulator (BixSb1−x)2Te3 nanoplates","authors":"Tingting Li, Xudong Shi, Mingze Li, Xuan P.A. Gao, Zhenhua Wang, Zhidong Zhang","doi":"10.1016/j.jmst.2024.12.064","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.064","url":null,"abstract":"We report a systematic study on the transport properties of (Bi<sub>0.2</sub>Sb<sub>0.8</sub>)<sub>2</sub>Te<sub>3</sub> and (Bi<sub>0.4</sub>Sb<sub>0.6</sub>)<sub>2</sub>Te<sub>3</sub> nanoplates with a thickness of about 6 nm grown by chemical vapor deposition (CVD) on Si/SiO<sub>2</sub> substrate. We achieve a significant ambipolar field effect in the two samples with different compositions by applying back-gate voltage, successfully tuning the Fermi level across the Dirac point of surface states. It is found that the Hall resistance exhibits strong non-linear behavior and magnetic field induced sign change of the slope when the Fermi level is near the Dirac point, indicating the coexistence of n-type and p-type carriers. Moreover, this coincides with the striking crossover from weak antilocalization (WAL) to linear magnetoresistance (LMR). These gate and temperature dependent magneto-transport studies provide a deeper insight into the nature of LMR and WAL in topological materials.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"36 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495881","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2025-02-26DOI: 10.1016/j.jmst.2024.12.065
Feng Wang, Wei Li, Zhihong Chen, Jianguo Guan
Coating uniform, compact and thin nanoshells on micro-sized particles is critical to various applications including anticorrosive broadband microwave absorbing materials (MAMs), yet effective processing methods remain lacking. In this work, a turbulent sol-gel method is developed to coat the desired SiO2 nanoshells on flaky carbonyl iron (FCI) particles. The adding millimeter-sized zirconia balls, driven by the orbital shaking, squeeze the solution and create significant relative motion between the liquid and balls, which generates turbulent flows. This significantly promotes the heterogeneous nucleation rate and high nucleation density, ultimately forming highly compact and uniform SiO2 nanoshells covering FCI particles to enhance the electromagnetic absorption and anticorrosion properties. The as-obtained core-shell particles minimize the interface polarization and retain high magnetic loss, resulting in an improved impedance matching and a reflection loss < −10 dB with a bandwidth of 6.5 GHz at a thin thickness of 1 mm. Moreover, they also show a substantial order-of-magnitude improvement in anticorrosion performance. This work provides a promising method to fabricate anticorrosive, broadband and thin-thickness MAMs. The turbulent sol-gel method developed herein offers a facile and effective approach for fabricating uniform compact nanoshells on micro-sized particles.
{"title":"Anticorrosive magnetic microwave absorbers by turbulent sol-gel method","authors":"Feng Wang, Wei Li, Zhihong Chen, Jianguo Guan","doi":"10.1016/j.jmst.2024.12.065","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.065","url":null,"abstract":"Coating uniform, compact and thin nanoshells on micro-sized particles is critical to various applications including anticorrosive broadband microwave absorbing materials (MAMs), yet effective processing methods remain lacking. In this work, a turbulent sol-gel method is developed to coat the desired SiO<sub>2</sub> nanoshells on flaky carbonyl iron (FCI) particles. The adding millimeter-sized zirconia balls, driven by the orbital shaking, squeeze the solution and create significant relative motion between the liquid and balls, which generates turbulent flows. This significantly promotes the heterogeneous nucleation rate and high nucleation density, ultimately forming highly compact and uniform SiO<sub>2</sub> nanoshells covering FCI particles to enhance the electromagnetic absorption and anticorrosion properties. The as-obtained core-shell particles minimize the interface polarization and retain high magnetic loss, resulting in an improved impedance matching and a reflection loss < −10 dB with a bandwidth of 6.5 GHz at a thin thickness of 1 mm. Moreover, they also show a substantial order-of-magnitude improvement in anticorrosion performance. This work provides a promising method to fabricate anticorrosive, broadband and thin-thickness MAMs. The turbulent sol-gel method developed herein offers a facile and effective approach for fabricating uniform compact nanoshells on micro-sized particles.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"22 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495878","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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.
{"title":"Advancements in hydrogen embrittlement of selective laser melting austenitic stainless steel: Mechanisms, microstructures, and future directions","authors":"Chilou Zhou, Xinrui Yan, Haixiang Wang, Yanlei Huang, Jinxin Xue, Jiaqing Li, Xinfeng Li, Wulin Han","doi":"10.1016/j.jmst.2025.01.019","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.01.019","url":null,"abstract":"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.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"6 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143495879","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 : 2025-02-26DOI: 10.1016/j.jmst.2025.01.021
Monunith Anithkumar, Nirmal Prashanth Maria Joseph Raj, Asokan Poorani Sathya Prasanna, Thanjan Shaji Bincy, Sang-Jae Kim
Air mouse has a wide range of uses in robotics, automation, and VR/AR technologies. In this work, the air mouse is prepared using triboelectric sensors, controller units, and machine learning. The triboelectric nanogenerator (TENG) performance was optimized by altering the filler's properties. A dual-ferroelectric crystal system BNKT (xBi0.5Na0.5TiO3-(1−x) Bi0.5K0.5TiO3) was prepared with different concentrations (x = 0.5, 0.6, 0.7, 0.8, and 0.9) to alter the dielectric property. The BNKT-8-based TENG showed a higher performance of 134.04 V and 1.49 μA. The prepared device enables to power the small electronic devices such as hygrometers and calculators. Using this TENG device air mouse system with machine learning allows the user to control the mouse pointer in the computer using the smart glove with a high accuracy of 100%.
{"title":"Enhancing triboelectrification with synergistic effect of xBNT-(1−x)BKT fillers and machine learning enabled advanced air mouse technology","authors":"Monunith Anithkumar, Nirmal Prashanth Maria Joseph Raj, Asokan Poorani Sathya Prasanna, Thanjan Shaji Bincy, Sang-Jae Kim","doi":"10.1016/j.jmst.2025.01.021","DOIUrl":"https://doi.org/10.1016/j.jmst.2025.01.021","url":null,"abstract":"Air mouse has a wide range of uses in robotics, automation, and VR/AR technologies. In this work, the air mouse is prepared using triboelectric sensors, controller units, and machine learning. The triboelectric nanogenerator (TENG) performance was optimized by altering the filler's properties. A dual-ferroelectric crystal system BNKT (<em>x</em>Bi<sub>0.5</sub>Na<sub>0.5</sub>TiO<sub>3</sub>-(1−<em>x</em>) Bi<sub>0.5</sub>K<sub>0.5</sub>TiO<sub>3</sub>) was prepared with different concentrations (<em>x</em> = 0.5, 0.6, 0.7, 0.8, and 0.9) to alter the dielectric property. The BNKT-8-based TENG showed a higher performance of 134.04 V and 1.49 μA. The prepared device enables to power the small electronic devices such as hygrometers and calculators. Using this TENG device air mouse system with machine learning allows the user to control the mouse pointer in the computer using the smart glove with a high accuracy of 100%.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"28 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143507134","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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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