Journal of Materials Science & Technology最新文献

{"title":"Enhanced synaptic properties in HfO2-based trilayer memristor by using ZrO2-x oxygen vacancy reservoir layer for neuromorphic computing","authors":"Turgun Boynazarov, Joonbong Lee, Hojin Lee, Sangwoo Lee, Hyunbin Chung, Dae Haa Ryu, Haider Abbas, Taekjib Choi","doi":"10.1016/j.jmst.2024.12.020","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.020","url":null,"abstract":"Neuromorphic computing devices leveraging HfO₂ and ZrO₂ materials have recently garnered significant attention due to their potential for brain-inspired computing systems. In this study, we present a novel trilayer Pt/HfO₂/ZrO_2-<em>_x</em>/HfO₂/TiN memristor, engineered with a ZrO_2-<em>_x</em> oxygen vacancy reservoir (OVR) layer fabricated via radio frequency (RF) sputtering under controlled oxygen ambient. The incorporation of the ZrO_2-<em>_x</em> OVR layer enables enhanced resistive switching characteristics, including a high ON/OFF ratio (∼8000), excellent uniformity, robust data retention (&gt;10⁵ s), and multilevel storage capabilities. Furthermore, the memristor demonstrates superior synaptic plasticity with linear long-term potentiation (LTP) and depression (LTD), achieving low non-linearity values of 1.36 (LTP) and 0.66 (LTD), and a recognition accuracy of 95.3% in an MNIST dataset simulation. The unique properties of the ZrO_2-<em>_x</em> layer, particularly its ability to act as a dynamic oxygen vacancy reservoir, significantly enhance synaptic performance by stabilizing oxygen vacancy migration. These findings establish the OVR-trilayer memristor as a promising candidate for future neuromorphic computing and high-performance memory applications.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"7 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142987236","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}

{"title":"Out-of-plane ordered quaternary borides M’4VSiB2 (M’ = Nb and Mo): Experimental and theoretical investigations","authors":"","doi":"10.1016/j.jmst.2024.11.066","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.11.066","url":null,"abstract":"Two novel out-of-plane ordered quaternary borides M’4VSiB2 (M’ = Nb and Mo) have been synthesized. The out-of-plane ordered characteristic has been co…","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"54 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142987016","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}

{"title":"Simultaneous regulation on electrochemical polishing effect and electrode interface reaction with Glucose-NaF dual-additive for additive manufactured AlSi10Mg","authors":"Han Liu, Minheng Ye, Xianfeng Shen, Zuoyan Ye, Guowei Wang, Ping Xu, Chao Wang","doi":"10.1016/j.jmst.2024.11.068","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.11.068","url":null,"abstract":"Additive manufacturing (AM) methods have garnered considerable attention owing to their flexibility in fabricating complex parts with desirable mechanical properties. However, the poor surface quality of the resulting metal parts remains a severe challenge for the applications. Here, a novel dual-additive synergy strategy is presented, which simultaneously enhances material removal efficiency and regulates electrode surface reactions during electrochemical polishing (ECP) of AM AlSi10Mg. Theoretical studies and experimental characterizations confirm that NaF promotes selective dissolution at the peaks, while glucose acts as a stabilizer for the surface valleys. This approach effectively facilitates the selective removal of surface protrusions, achieving a smoother and more uniform surface finish, resulting in a surface roughness reduction of approximately 86%, compared to a 63% reduction without additives. This study not only provides a new approach for optimizing surface quality of AM AlSi10Mg but also offers new insights into electrolyte design and the stabilization of metal anodes.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"75 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142987017","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}

{"title":"Interstitial oxygen solutes promote atomic-scale heterogeneities to achieve superior irradiation tolerance in body-centered cubic multi-principal element alloys","authors":"Zhengxiong Su, Jinxue Yang, Xiaoyang Zhou, Jing Li, Ping Zhang, Chen Zhang, Tan Shi, Ke Jin, Yongduo Sun, Lu Wu, Xiaoyong Wu, En Ma, Chenyang Lu","doi":"10.1016/j.jmst.2024.11.067","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.11.067","url":null,"abstract":"Designing alloys capable of withstanding irradiation is a crucial aspect of developing materials for nuclear reactors and aerospace applications. Local chemical order (LCO) has recently been recognized as a new microstructural parameter to leverage, and its effect on the mechanical properties of body-centered cubic (BCC) multi-principal element alloys (MPEAs) has attracted much attention. However, the impact of LCO on the dynamic evolution of irradiation-induced defects in BCC MPEAs remains much less explored. In this study, we engineered varying degrees of LCO and local lattice distortion in NbZrTi BCC MPEAs by alloying them with different concentrations of interstitial oxygen solutes, and analyzed their effects on the evolution of radiation-induced defects during He irradiation at 673 K to 873 K, with a fluence of 5 × 10¹⁶ ions/cm² and a peak dose of approximately 1 DPA. Using first-principles calculations and atomic-scale analysis of microstructures and chemical elements, we discovered that interstitial oxygen atoms enhance LCO and increase local lattice distortion. These heterogeneities increase the formation energy, and localize the diffusion, of vacancies, hence effectively reducing the transport of aggregating helium that causes bubble swelling. The initiation and growth of dislocation loops and precipitates are depressed as well. The manipulation of irradiation defects in BCC MPEAs, through orchestrating interstitial oxygen solutes and the LCO they provoke, adds a practical strategy for designing advanced alloys for nuclear applications.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"26 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142981515","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}

{"title":"Construction of self-healing polycaprolactone composite foams with segregated structure for superior electromagnetic interference shielding","authors":"Xin Yan, Hexin Zhang, Weihua Gu, KeunByoung Yoon","doi":"10.1016/j.jmst.2024.12.019","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.019","url":null,"abstract":"Electromagnetic interference shielding materials are inevitably damaged during service, causing a serious decline in their shielding performance. Therefore, it is urgent to develop polymer-based composites with excellent electromagnetic shielding and self-healing properties. In this study, a layered foam/film structure polycaprolactone composite characterized by electric/magnetic bifunctionality was constructed by a hot-pressing process and supercritical carbon dioxide foaming. The microcellular framework offers rich heterogeneous interfaces and improves electromagnetic attenuation capabilities. Such a reasonable construction of asymmetric shielding networks optimizes the impedance matching, while the incident electromagnetic waves form a special attenuation mode of “absorption-reflection-reabsorption”. The polycaprolactone composite foam exhibits an excellent electromagnetic interference shielding effectiveness of 53.6 dB in the X-band and a low reflection value of only 0.36, effectively reducing secondary pollution. In addition, the damaged polycaprolactone composite foam exhibits over 93% electromagnetic interference shielding effectiveness and healing efficiency, ensuring the long-term stability of the material in practical applications.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"51 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142974834","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}

{"title":"On the role of Al or Ti alloying in additively manufactured IN718 alloys","authors":"Yubo Li, Xiaopei Wang, Jingtao Tang, Chi Zhang, Zhigang Yang, Hao Chen","doi":"10.1016/j.jmst.2024.11.064","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.11.064","url":null,"abstract":"Although Al or Ti addition is promising to improve the performance of IN718, traditional metallurgical processing methods encounter difficulties in manufacturing superalloys with higher Al and Ti content. Laser powder bed fusion (LPBF) exhibits great potential to address these challenges, but the effects of Al or Ti content on additively manufactured IN718 stay unclear. In this work, we fabricated crack-free modified IN718 alloys with elevated Al or Ti content through in-situ alloying using laser powder bed fusion. The results revealed that the alloy 1 wt.% Ti addition outperformed IN718 in strength at both ambient and elevated temperatures by about 120 and 70 MPa, respectively, while the addition of 1 wt.% Al decreases the yield strength due to the significant decrease of γʹʹ phase fraction. However, the addition of 3 wt.% Al leads to precipitation of σ-phase, while 3 wt.% Ti addition leads to growth of coarse η-phase of micrometers at grain boundaries. After aging treatment at 720 °C for 50 h, it is also found that the thermal stability of γʹʹ phase is substantially improved by Ti alloying due to the formation of γʹʹ/γʹ/γʹʹ sandwich structure. These findings highlight the advantages of Ti alloying in enhancing thermal stability and mechanical performance.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"15 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142974835","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}

{"title":"High-entropy oxides: Emergent materials for electrochemical energy storage and conversion","authors":"Shengyang Dong, Ruiqi Ren, Jingyuan Zhang, Xiaozhi Bao, Xin Liu, Qiuwei Shi, Zhijie Chen, Huaiyu Shao","doi":"10.1016/j.jmst.2024.11.065","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.11.065","url":null,"abstract":"High-entropy oxides (HEOs) have received considerable attention in the past few years due to their unique high configurational entropy and ideal elemental adjustability. HEOs are generally considered to be a special class of oxides containing five or more different metal cations. The attractive synergistic effect makes HEOs promising energy storage and conversion material. However, at present, the knowledge of HEOs and their practical applications on electrochemistry is still scattered without comprehensive report. In this review, we highlight the preparation methods, common crystal structures and their applications in the field of electrochemistry, which can be divided into two main categories: (1) electrochemical energy storage devices, including supercapacitors, lithium-ion batteries, sodium-ion batteries, and other batteries; (2) electrocatalysis reaction system, including hydrogen evolution reaction (HER), oxygen evolution reaction (OER), oxygen reduction reaction (ORR), and electrocatalytic CO₂ reduction reaction (CO₂RR). Finally, the remaining challenges and prospects in the future are envisioned in the related field, which will help to unlock the mysteries of HEOs for energy storage and conversion.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"17 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142974535","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}

{"title":"Hetero-interfaces strategy based on Fe3O4 microspheres to construct multi-band tunable and anticorrosive absorbers","authors":"Na Chen, Xue-Feng Pan, Ru-Yu Wang, Bing-Bing Han, Jia-Xin Li, Zhen-Jie Guan, Kang-Jun Wang, Jian-Tang Jiang","doi":"10.1016/j.jmst.2024.11.062","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.11.062","url":null,"abstract":"The development of Fe₃O₄ in the fields of electromagnetic wave absorption (EMA) is severely hindered by its narrow bandwidth and environmental tolerance. Herein, we introduce dielectric components and favorable hetero-interface engineering on Fe₃O₄ to promote the EMA and broaden an effective absorption bandwidth (EAB). Before incorporation of dielectric component, Fe₃O₄ microspheres show a high-effective EMA in C and X bands with the strongest reflection loss (RL) of 70.40 dB at 8.86 GHz and a corresponding EAB of 5.3 GHz (5.3−10.6 GHz). Upon the introduction of dielectric SiO₂ or TiO₂ coating, the tailored permittivity and the enhanced dielectric loss are obtained by reinforcing the interface polarization. Meanwhile, the structural feature imparts desirable impedance matching and multiple reflection and scattering absorption. As a result, Fe₃O₄@SiO₂ exhibits outstanding EMA performances in C, X, and Ku bands, including an impressive EAB of 6.5 GHz (11.5–18.0 GHz) covering the whole Ku band with only 2.5 mm. Fe₃O₄@TiO₂ achieves a broaden EAB of 8.4 GHz with 3.0 mm, which is better than those of many Fe₃O₄-based absorbers previously reported. More importantly, both SiO₂ and TiO₂ coating efficiently enhance the marine anticorrosion properties of Fe₃O₄, making it a superior EMA material with strong and wide absorbing features for EMA applications.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"68 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142962643","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}

{"title":"Flexible, magnetic and sandwich-structural Fe2O3/CNT/Fe2O3 composite film with absorption-dominant EMI shielding performance","authors":"Mengmeng Wang, Li Tian, Xiao You, Junmin Zhang, Qinggang Li, Jinshan Yang, Shaoming Dong","doi":"10.1016/j.jmst.2024.11.060","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.11.060","url":null,"abstract":"To mitigate secondary electromagnetic pollution, there is an urgent need to develop absorption-dominant electromagnetic interference (EMI) shielding materials with low density, reduced thickness, lightweight construction, flexibility, exceptional mechanical strength, and superior electrothermal and photothermal properties, particularly for flexible and wearable electronics. In this regard, we designed an absorption-based composite film comprising carbon nanotubes (CNT) and α-Fe₂O₃, featuring a CNT layer sandwiched between two α-Fe₂O₃ layers on the upper and lower surfaces. This composite film was fabricated through an electrodeposition process followed by a thermal annealing procedure to achieve enhanced EMI shielding performance along with improved electrothermal and photothermal properties. The strategically designed sandwich structure allows the rough surface of the upper α-Fe₂O₃ layer to not only improve the impedance mismatch between free space and the composite film, facilitating the penetration of incident electromagnetic (EM) waves into the film and promoting increased EM absorption rather than reflection, but also to enhance electrical conductivity, thereby improving electron mobility and density. Consequently, the average total shielding effectiveness (SE) of the CNT/Fe₁₆-300 composite demonstrates remarkable EMI shielding effectiveness (EMI SE: 56.8 dB). Furthermore, the alteration in the absorption-to-reflection ratio (<em>A</em>/<em>R</em>) signifies a transition in the EMI shielding mechanism from reflection (0.69 for the pristine CNT film) to absorption (1.86 for the CNT/Fe₁₆-300) with the incremental deposition of α-Fe₂O₃ nanoparticles. This work presents a feasible manufacturing approach for developing composite films with a sandwich structure that exhibits absorption-dominant EMI shielding capabilities, contributing to advancements in thermal management and multifunctional electromagnetic shielding applications.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"36 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142962665","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}

{"title":"Strong and plastic near-α titanium alloy by Widmanstätten structure spheroidization","authors":"J.K. Bai, H. Zhang, Z.B. Zhao, R.D. Yang, S.Z. Zhang, T. Chen, X.Y. Zhang, S.X. Liang, R.P. Liu","doi":"10.1016/j.jmst.2024.12.018","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.018","url":null,"abstract":"The spheroidization of the Widmanstätten structure through thermo-mechanical processes, leading to the formation of fine recrystallized and sub-grain structures, is crucial for achieving a balance between strength and plasticity. This study systematically examined the spheroidization mechanism of the Widmanstätten structure in Ti-25Zr-4Al-1.5Mn (wt.%, TiZrAlMn) alloy under varying rolling temperatures and its influence on microstructure and mechanical properties. After rolling at 900 °C, the specimen exhibited a mixed morphology of Widmanstätten and Basket-weave structures, with a high yield strength of approximately 1038 MPa but low plasticity (∼5.2%). While the rolling temperature was reduced to 850 °C, the specimen exhibited refined prior-<em>β</em> grains, discontinuous grain boundaries and a small amount of equiaxed <em>α</em> grains, which collectively enhanced plasticity (∼12.4%) while preserving yield strength. As the rolling temperature further decreased, the dynamic recrystallization mechanism shifted from the discontinuous dynamic recrystallization (DDRX) to continuous dynamic recrystallization (CDRX). Specimens rolled at 800 °C and 750 °C showed excellent strength-plasticity synergy, with yield strengths of 1070 MPa and 1110 MPa, respectively, and total elongations of 15% and 18%, respectively. The enhanced yield strength is attributed to both fine-grain and sub-grain strengthening. Furthermore, the lower degree of recrystallization in the 750-AC specimen preserved a relatively high dislocation density, offering additional strengthening. The favorable plasticity results from a combination of equiaxed <em>α</em> grains, “soft” barrier sub-grains, and a small number of twins. Additionally, the 750-AC specimen retained 6.4% of the fine <em>β</em> grains and the weak basal texture. These characteristics contribute to the enhanced plasticity. Therefore, 750 °C is the optimal rolling temperature for achieving the best strength-plasticity synergy in the hot-rolled TiZrAlMn alloy. These findings demonstrate that selecting the appropriate temperature during thermomechanical processing to optimize recrystallized grains and sub-grain content ensures excellent plasticity at high yield strength. This offers valuable guidance for developing near-<em>α</em> Ti alloys with superior mechanical properties.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"26 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142961908","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}