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Atomic perspective of strengthening mechanism of ZrB2-reinforced FeCoCrNiAl0.5
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2025-03-01 DOI: 10.1016/j.matlet.2025.138324
Yang Chen, Pengliang Hou, Xi Wang
{"title":"Atomic perspective of strengthening mechanism of ZrB2-reinforced FeCoCrNiAl0.5","authors":"Yang Chen,&nbsp;Pengliang Hou,&nbsp;Xi Wang","doi":"10.1016/j.matlet.2025.138324","DOIUrl":"10.1016/j.matlet.2025.138324","url":null,"abstract":"<div><div>In this study, the strengthening mechanism of polycrystalline FeCoCrNiAl<sub>0.5</sub>-X% ZrB<sub>2</sub> (X = 0, 5, 10) was investigated via molecular dynamics. Nanoindentation simulations showed that ZrB<sub>2</sub> particles improved the hardness and microzone mechanical properties of models. In particular, ZrB<sub>2</sub> absorbed Mises stress, reduced the drasticness of strain changes along the mid-axis direction of the shear plane, and mitigated the pile-up around the indenter. The proliferation of internal planar defects in the model resulted from ZrB<sub>2</sub>, which impeded the growth and slip of dislocations. The number of HCP phase and other phases rose inside the model due to ZrB<sub>2</sub>, followed by the decrease in FCC phase content.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"388 ","pages":"Article 138324"},"PeriodicalIF":2.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534742","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}
引用次数: 0
Determination of the Verdet constant in the topological insulator Bi1.1Sb0.9Te2S
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2025-03-01 DOI: 10.1016/j.matlet.2025.138325
Yulia E. Kovalenko , Michael V. Yakushev , Vladimir I. Grebennikov , Milan Orlita , Konstantin A. Kokh , Oleg E. Tereshchenko , Tatyana V. Kuznetsova
{"title":"Determination of the Verdet constant in the topological insulator Bi1.1Sb0.9Te2S","authors":"Yulia E. Kovalenko ,&nbsp;Michael V. Yakushev ,&nbsp;Vladimir I. Grebennikov ,&nbsp;Milan Orlita ,&nbsp;Konstantin A. Kokh ,&nbsp;Oleg E. Tereshchenko ,&nbsp;Tatyana V. Kuznetsova","doi":"10.1016/j.matlet.2025.138325","DOIUrl":"10.1016/j.matlet.2025.138325","url":null,"abstract":"<div><div>The electronic properties of thin single crystals of the topological insulator Bi<sub>1.1</sub>Sb<sub>0.9</sub>Te<sub>2</sub>S were studied by magneto-optical spectroscopy. A sharp edge of the absorption band and Fabry-Perot oscillations in the transmission spectra measured at a temperature of 4.2 K made it possible to estimate the band gap as 0.31 eV and the refractive index 6. The application of magnetic fields up to 11 T induced a decrease in the amplitude of the oscillations attributed to the Faraday effect with an average (over the spectral range from 0.05 to 0.31 eV) Verdet constant of 2.5·10<sup>3</sup> degrees/cm/T.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"389 ","pages":"Article 138325"},"PeriodicalIF":2.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143547928","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}
引用次数: 0
Fe-CN catalyst mixed in PVDF membrane for reducing membrane fouling through PMS activation
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2025-03-01 DOI: 10.1016/j.matlet.2025.138329
Kang Xiong, Yi Du, Xiuxia Zhang, Lihan Ren, De Li, Zhoutong Liu
{"title":"Fe-CN catalyst mixed in PVDF membrane for reducing membrane fouling through PMS activation","authors":"Kang Xiong,&nbsp;Yi Du,&nbsp;Xiuxia Zhang,&nbsp;Lihan Ren,&nbsp;De Li,&nbsp;Zhoutong Liu","doi":"10.1016/j.matlet.2025.138329","DOIUrl":"10.1016/j.matlet.2025.138329","url":null,"abstract":"<div><div>Membrane separation technology has the advantages of easy operation and low cost, but the problem of membrane fouling seriously limits its development. Recent studies have shown that Peroxymonosulfate (PMS) advanced oxidation technology can effectively alleviate membrane fouling. In this research, Fe-CN catalyst-modified polyvinylidene difluoride (Fe-CN@PVDF) membranes were successfully prepared. Pure water flux, catalytic performance and anti-fouling performance were investigated. The results showed that the highest pure water flux (554.84 L·m<sup>−2</sup>·h<sup>−1</sup>) and excellent degradation efficiency (95.49 %) were achieved with 1.5 wt% Fe-CN addition (M<sub>1.5</sub>). The M<sub>1.5</sub>/PMS system produced active species including radicals and singlet oxygen, and the removal rate was maintained at 78.13 % after four cycles. Furthermore, The M<sub>1.5</sub>/PMS system can effectively inhibit the growth of bacteria and fungi. Additionally, the adsorption of organic pollutants, flux attenuation, and flux recovery of M<sub>1.5</sub> were superior to those of primary PVDF membrane (M<sub>0</sub>).</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"389 ","pages":"Article 138329"},"PeriodicalIF":2.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143547926","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}
引用次数: 0
Rapid hardening and high-fluidity ultra-high performance cement-based grout with calcium formate
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2025-03-01 DOI: 10.1016/j.matlet.2025.138326
Feiyang Li , Xinyi Ran , Yi Li , Weihua Ou , Peipeng Li
{"title":"Rapid hardening and high-fluidity ultra-high performance cement-based grout with calcium formate","authors":"Feiyang Li ,&nbsp;Xinyi Ran ,&nbsp;Yi Li ,&nbsp;Weihua Ou ,&nbsp;Peipeng Li","doi":"10.1016/j.matlet.2025.138326","DOIUrl":"10.1016/j.matlet.2025.138326","url":null,"abstract":"<div><div>This study utilized calcium formate as accelerator to prepare ultra-high performance cement-based (UHPC) grout with both excellent rapid hardening and high-fluidity characteristics. Mixtures with different calcium formate content were compared by analyzing their flowability, compressive strength, heat flow, pore size distribution, chloride penetration resistance, hydration product composition and microstructure. The results indicated that calcium formate significantly enhanced the compressive strength of UHPC grout while maintaining adequate workability. When the calcium formate content was 0.9 % of the binders, the 1d and 3d compressive strength of the UHPC grout reached 66.9 MPa and 115.5 MPa, which were 11.7 % and 24.9 % higher than those of the reference group respectively. Furthermore, calcium formate facilitated the hydration process, generating additional hydration products that densified the pore structure. This improvement in the pore structure optimization contributed to enhanced durability of the UHPC grout.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"388 ","pages":"Article 138326"},"PeriodicalIF":2.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534744","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}
引用次数: 0
Sers-active and recyclable Nb2O5/Au platforms
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2025-03-01 DOI: 10.1016/j.matlet.2025.138308
Max Pavlović , Natalia Khomiakova , Eva Kočišová , Marek Procházka , Ondřej Kylián
{"title":"Sers-active and recyclable Nb2O5/Au platforms","authors":"Max Pavlović ,&nbsp;Natalia Khomiakova ,&nbsp;Eva Kočišová ,&nbsp;Marek Procházka ,&nbsp;Ondřej Kylián","doi":"10.1016/j.matlet.2025.138308","DOIUrl":"10.1016/j.matlet.2025.138308","url":null,"abstract":"<div><div>Due to their unique physicochemical properties, metal/metal oxide nanomaterials are gaining increasing attention in the scientific community. One possible and promising application of such materials is their use as recyclable platforms for surface-enhanced Raman scattering (SERS) spectroscopy. Here we explore the possible use of Nb<sub>2</sub>O<sub>5</sub>/Au coatings fabricated by magnetron sputtering combined with thermal treatment as SERS-active platforms recyclable by UV-light irradiation. It is shown that the SERS activity of Nb<sub>2</sub>O<sub>5</sub>/Au coatings is solely related to the plasmonic character of Au nanostructures that, under optimized conditions allows for the SERS detection of methylene blue down to the concentration of 2 × 10<sup>-7</sup> M with a relative standard deviation 15 % in the acquired SERS spectra. Furthermore, it is demonstrated that the Nb<sub>2</sub>O<sub>5</sub>/Au coatings may be recycled by UV light. The cleaning efficiency provided by Nb<sub>2</sub>O<sub>5</sub> is exponentially dependent on the UV irradiation time with a characteristic time equal to 1.75 h.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"388 ","pages":"Article 138308"},"PeriodicalIF":2.7,"publicationDate":"2025-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143550040","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}
引用次数: 0
Friction stir welding of pipes: Effect of traverse speed, offset and shoulder profile
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2025-02-28 DOI: 10.1016/j.matlet.2025.138320
Atishey Mittal , Vikas Kumar , Surjit Angra , Arshad Noor Siddiquee
{"title":"Friction stir welding of pipes: Effect of traverse speed, offset and shoulder profile","authors":"Atishey Mittal ,&nbsp;Vikas Kumar ,&nbsp;Surjit Angra ,&nbsp;Arshad Noor Siddiquee","doi":"10.1016/j.matlet.2025.138320","DOIUrl":"10.1016/j.matlet.2025.138320","url":null,"abstract":"<div><div>Friction Stir Welding (FSW) of AA6063 pipes was performed by varying: shoulder profile, tool offset and traverse speed. Microstructure and microhardness were analysed. Nearly 100 % joint efficiency was obtained. The profile of bead of FSWed pipe and microhardness was found to be different from FSW plate welds. Unlike plate-welds the surface of pipe joints possessed convex shaped crown. Maximum hardness exceeded base material (BM) hardness and pipe-welds possessed inverted cup-shape profile. Traverse speed 162 mm/min, convex shoulder and 0.25 mm offset gave optimum results and maximum ultimate strength (UTS) of 138 MPa. Grain size of BM was significantly refined from 140 to 9 µm in the stir-zone but coarsened to 160 µm in the heat affected zone.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"388 ","pages":"Article 138320"},"PeriodicalIF":2.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143527307","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}
引用次数: 0
A novel in-situ Al2O3@TiC@TiB multilayer core–shell ceramic particle reinforced Fe-based composite coating by laser cladding 通过激光熔覆实现的新型原位 Al2O3@TiC@TiB 多层核壳陶瓷颗粒增强铁基复合涂层
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2025-02-28 DOI: 10.1016/j.matlet.2025.138321
Jianping Ma , Lincong Li , Zhaohui Wang , Tianwei Yang , Fu Guo
{"title":"A novel in-situ Al2O3@TiC@TiB multilayer core–shell ceramic particle reinforced Fe-based composite coating by laser cladding","authors":"Jianping Ma ,&nbsp;Lincong Li ,&nbsp;Zhaohui Wang ,&nbsp;Tianwei Yang ,&nbsp;Fu Guo","doi":"10.1016/j.matlet.2025.138321","DOIUrl":"10.1016/j.matlet.2025.138321","url":null,"abstract":"<div><div>A novel Al<sub>2</sub>O<sub>3</sub>@TiC@TiB multilayer core–shell ceramic particle was in-situ synthesized in the Fe-based composite coating by laser cladding. The ceramic particle was formed by the addition of trace Al<sub>2</sub>O<sub>3</sub> particles. The core of the multilayer ceramic particle was spherical α-Al<sub>2</sub>O<sub>3</sub>, the inner shell and outer shell of the particle was TiC and TiB, respectively. The Al<sub>2</sub>O<sub>3</sub>@TiC@TiB particle was uniformly distributed in the coating. The hardness and wear rate of the Al<sub>2</sub>O<sub>3</sub>-added coatings were 1277.7HV and 0.006 g/h, respectively. Compared with the coatings without the addition of Al<sub>2</sub>O<sub>3</sub>, the hardness was improved approximately 32 % and the wear resistance was enhanced by approximately 50 %. This study provides a promising novel multilayer core–shell ceramic particle reinforcement for composite coatings fabricated by laser cladding.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"388 ","pages":"Article 138321"},"PeriodicalIF":2.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143529193","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}
引用次数: 0
Density functional theory modeling of Pr and B-site promoters (Pd, Ti and Ru) doping effects on oxygen vacancy formation in perovskite Solid Oxide Fuel Cell Anodes
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2025-02-28 DOI: 10.1016/j.matlet.2025.138318
Annanthan Narayanasamy , Nurul Akidah Baharuddin , Azim Fitri Zainul Abidin , Wan Nor Anasuhah Wan Yusoff , Elankovan A. Sundararajan , Mahendra Rao Somalu
{"title":"Density functional theory modeling of Pr and B-site promoters (Pd, Ti and Ru) doping effects on oxygen vacancy formation in perovskite Solid Oxide Fuel Cell Anodes","authors":"Annanthan Narayanasamy ,&nbsp;Nurul Akidah Baharuddin ,&nbsp;Azim Fitri Zainul Abidin ,&nbsp;Wan Nor Anasuhah Wan Yusoff ,&nbsp;Elankovan A. Sundararajan ,&nbsp;Mahendra Rao Somalu","doi":"10.1016/j.matlet.2025.138318","DOIUrl":"10.1016/j.matlet.2025.138318","url":null,"abstract":"<div><div>This study provides new insights into designing high-performance perovskite-based solid oxide fuel cell (SOFC) anode materials by exploring the synergistic effects of A-site Praseodymium (Pr) doping and B-site promoters dopant with Pd, Ti and Ru on oxygen vacancy formation and in-situ exsolution. Using density functional theory (DFT) calculations, the electronic structure, total energy, and oxygen vacancy formation energies of various percentage of Pr-doped and B-site promoters substituted SrFe<sub>0</sub>.<sub>8</sub> Co<sub>0</sub>.<sub>2</sub> O<sub>3</sub> perovskite structures were analysed. Pd-doped systems demonstrated significantly lower vacancy formation energies, particularly for Fe-O-Co and Fe-O-Pd bonds, indicating enhanced oxygen mobility and exsolution potential. Optimal compositions for promoting in-situ exsolution of Fe-Co nano-alloys were identified as Pr<sub>0</sub>.<sub>2</sub>Sr<sub>0</sub>.<sub>8</sub>Co<sub>0</sub>.<sub>15</sub> Fe<sub>0</sub>.<sub>8</sub>Pd<sub>0</sub>.<sub>05</sub>O<sub>3</sub> and Pr<sub>0</sub>.<sub>1</sub>Sr<sub>0</sub>.<sub>9</sub>Co<sub>0</sub>.<sub>15</sub>Fe<sub>0</sub>.<sub>8</sub>Pd<sub>0</sub>.<sub>05</sub>O<sub>3</sub>. These findings offer a promising approach to tailoring perovskite structures for enhanced oxygen ion conductivity, catalytic activity, and overall SOFC performance.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"388 ","pages":"Article 138318"},"PeriodicalIF":2.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143527308","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}
引用次数: 0
Ultrastrong 42CrMo/CoCrNi multilayer composites at cryogenic temperatures
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2025-02-28 DOI: 10.1016/j.matlet.2025.138322
Yuchen Zhang, Bo Li, Baoxi Liu, Kaisheng Ming
{"title":"Ultrastrong 42CrMo/CoCrNi multilayer composites at cryogenic temperatures","authors":"Yuchen Zhang,&nbsp;Bo Li,&nbsp;Baoxi Liu,&nbsp;Kaisheng Ming","doi":"10.1016/j.matlet.2025.138322","DOIUrl":"10.1016/j.matlet.2025.138322","url":null,"abstract":"<div><div>High-strength materials generally suffer low ductility due to poor strain-hardening, especially at low temperatures. Laminated composites that integrate high-strength and high-toughness materials provide a promising solution to this strength-ductility trade-off. Here we fabricate a multilayer composite comprising 42CrMo steel and CoCrNi medium-entropy alloy via hot-rolling. The resulting composite achieves an ultra-high yield strength of 1.61 GPa, tensile strength of 1.99 GPa, and ductility of 4.9 % at 93 K. The CoCrNi layers significantly enhance ductility by activating extensive twinning and stacking faults, which alleviate stress concentrations around 42CrMo layers while preserving their high strength. Moreover, optimizing the layer thickness and grain size further improves strength and ductility.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"388 ","pages":"Article 138322"},"PeriodicalIF":2.7,"publicationDate":"2025-02-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143527258","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}
引用次数: 0
Eco-friendly synthesis of gold nanoparticles using henna extract: Toward medical applications
IF 2.7 4区 材料科学
Materials Letters Pub Date : 2025-02-27 DOI: 10.1016/j.matlet.2025.138310
Mahsa Mohammadzadeh, Sheyda Labbaf, Ahmad Kermanpur
{"title":"Eco-friendly synthesis of gold nanoparticles using henna extract: Toward medical applications","authors":"Mahsa Mohammadzadeh,&nbsp;Sheyda Labbaf,&nbsp;Ahmad Kermanpur","doi":"10.1016/j.matlet.2025.138310","DOIUrl":"10.1016/j.matlet.2025.138310","url":null,"abstract":"<div><div>Gold nanoparticles (GNPs) are synthesized using aqueous henna extract as a natural reducing and stabilizing agent. The results revealed spherical GNPs with an average size of 6 ± 2.5 nm and zeta potential of − 53.3 mV. The GNPs had significant antibacterial activity, photothermal efficacy, antioxidant properties, and non-cytotoxicity.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"388 ","pages":"Article 138310"},"PeriodicalIF":2.7,"publicationDate":"2025-02-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143534473","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}
引用次数: 0
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