Materials Letters最新文献

Preventing the formation of stray grains in single-crystal blade platforms using a triangular grain continuator 利用三角形晶粒连续器防止单晶叶片平台中杂散晶粒的形成

IF 2.7 4区材料科学

Materials Letters Pub Date : 2026-05-05 DOI: 10.1016/j.matlet.2026.140806

Dariusz Szeliga , Rafał Cygan

引用次数: 0

Effect of lode angle on the ductile fracture strain of aluminum alloy AA5083-O 载荷角对AA5083-O铝合金韧性断裂应变的影响

IF 2.7 4区材料科学

Materials Letters Pub Date : 2026-05-04 DOI: 10.1016/j.matlet.2026.140818

Xixian Li , Fuminori Yanagimoto , Shohei Uranaka , Chenjun Yu , Tomoya Kawabata

{"title":"Effect of lode angle on the ductile fracture strain of aluminum alloy AA5083-O","authors":"Xixian Li , Fuminori Yanagimoto , Shohei Uranaka , Chenjun Yu , Tomoya Kawabata","doi":"10.1016/j.matlet.2026.140818","DOIUrl":"10.1016/j.matlet.2026.140818","url":null,"abstract":"<div><div>This study investigates the dependence of ductile fracture-initiation strain on the Lode angle in aluminum alloy 5083-O to help identify an appropriate phenomenological damage model for crack propagation simulations. Novel rectangular-notched (RN) tensile specimens were used to overcome the coupled variation of stress-state parameters in conventional test matrices. Finite element analysis showed that the RN specimens could vary the normalized Lode angle parameter independently from 0.01 to 0.92 while maintaining the average stress triaxiality in the central fracture-initiation zone at approximately 0.70. Quasi-static tensile tests and corresponding simulations revealed only slight variation in the fracture-initiation strain, with mean values ranging from 0.268 to 0.278 and limited scatter for all specimen configurations, despite a clear morphological transition from equiaxed to elongated dimples. These results indicate weak apparent sensitivity of the fracture-initiation strain of AA5083-O to the Lode angle under the investigated stress states. For engineering prediction of typical Mode I crack propagation in AA5083-O, a conventional triaxiality-dependent fracture model without explicit Lode-angle incorporation thus appears to be a reasonable simplification.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"418 ","pages":"Article 140818"},"PeriodicalIF":2.7,"publicationDate":"2026-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147827463","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

Interfacial engineering of glass-ceramic/steel joints using ceramic interlayers: designing thermoelastic stress and chemical stability 利用陶瓷夹层的玻璃陶瓷/钢接头界面工程：设计热弹性应力和化学稳定性

IF 2.7 4区材料科学

Materials Letters Pub Date : 2026-05-01 Epub Date: 2026-02-12 DOI: 10.1016/j.matlet.2026.140252

Hamid Abdoli , Masood Fakouri Hasanabadi , Hamidreza Farnoush

引用次数: 0

Surface-reconstructed porous PI/BaFe12O19/CS coatings with thickness-insensitive microwave absorption 具有厚度不敏感微波吸收的表面重构多孔PI/BaFe12O19/CS涂层

IF 2.7 4区材料科学

Materials Letters Pub Date : 2026-05-01 Epub Date: 2026-02-10 DOI: 10.1016/j.matlet.2026.140243

Pengyu Li, Xiaohua Feng, Mingsheng Wang, Xiaotian Feng, Yi Liu, Hua Li

{"title":"Surface-reconstructed porous PI/BaFe12O19/CS coatings with thickness-insensitive microwave absorption","authors":"Pengyu Li, Xiaohua Feng, Mingsheng Wang, Xiaotian Feng, Yi Liu, Hua Li","doi":"10.1016/j.matlet.2026.140243","DOIUrl":"10.1016/j.matlet.2026.140243","url":null,"abstract":"<div><div>Understanding the role of surface layers and developing thickness-insensitive microwave absorbing coatings are critical for practical applications. In this work, short-term atomic oxygen (AO) treatment selectively reconstructs only the top ∼10 μm of a porous polyimide/BaFe₁₂O₁₉/carbon nanosphere coating, enabling effective <em>Ku</em>-band absorption across a broad thickness range of 2.8–3.4 mm. The AO-induced surface layer introduces defect sites and disrupts local conductive pathways, reducing electrical conductivity from 0.23 to 0.22 S/m. This suppression of conduction loss improves impedance matching, while the preserved porous interior maintains strong attenuation capability. The synergy between the reconstructed surface and the internal porous framework leads to a smoother evolution of input impedance with varying thickness-key to achieving thickness-insensitive microwave absorption. The optimized coating further exhibits enhanced electromagnetic stability, including approximately 25% greater radar cross-section (<em>RCS</em>) reduction and expanded polarization-insensitive angular ranges by 10° in <em>TE</em> mode and 20° in <em>TM</em> mode.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"410 ","pages":"Article 140243"},"PeriodicalIF":2.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146187175","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

Stabilizing the cycling capability of LiFe0.5Mn0.5PO4 by carbon encapsulation for lithium-ion batteries 碳包封稳定锂离子电池LiFe0.5Mn0.5PO4的循环性能

IF 2.7 4区材料科学

Materials Letters Pub Date : 2026-05-01 Epub Date: 2026-02-06 DOI: 10.1016/j.matlet.2026.140224

Qidong Liang , Junnan Wu , Haiyang Peng , Yinjie Liu , Rui He , Bin Zhu , Xiaodan Li , Leiying Zeng , Shuxin Zhuang

{"title":"Stabilizing the cycling capability of LiFe0.5Mn0.5PO4 by carbon encapsulation for lithium-ion batteries","authors":"Qidong Liang , Junnan Wu , Haiyang Peng , Yinjie Liu , Rui He , Bin Zhu , Xiaodan Li , Leiying Zeng , Shuxin Zhuang","doi":"10.1016/j.matlet.2026.140224","DOIUrl":"10.1016/j.matlet.2026.140224","url":null,"abstract":"<div><div>Olivine LiFe<sub>0.5</sub>Mn<sub>0.5</sub>PO₄ is a promising cathode material for lithium-ion batteries owing to its excellent structural stability and high operating voltage. However, its intrinsically low electronic conductivity and Mn dissolution severely limited its large-scale applications. Herein, an <em>L</em>-tartaric-acid-assisted carbon coating strategy is developed to fabricate carbon-coated LiFe<sub>0.5</sub>Mn<sub>0.5</sub>PO₄ by a facile rheological phase reaction method. Density functional theory calculations combined with electrochemical analyses reveal that the –COOH and –OH groups of <em>L</em>-tartaric acid would promote strong interfacial interactions with LiFe<sub>0.5</sub>Mn<sub>0.5</sub>PO₄ and facilitate the formation of a uniform and continuous carbon coating on the matrix, thereby accelerating charge-transfer and inhibiting Mn dissolution. As a result, the optimized LFMP-0.5 delivers a high specific capacity of 158.7 mAh/g at 0.1C and improved cycling stability, maintaining a capacity retention rate of 95.97% after 500 cycles at 1C. This work demonstrates an effective and scalable carbon coating strategy for improving olivine phosphate cathodes and provides new insights into the rational design of high-performance lithium-ion batteries.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"410 ","pages":"Article 140224"},"PeriodicalIF":2.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146147222","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

Ultrahigh specific capacitance of 3670 F/g supercapacitor electrode achieved by nickel‑cobalt oxide with labyrinth-like porous structure 采用迷宫状多孔结构的氧化镍钴实现了3670 F/g超级电容器电极的超高比电容

IF 2.7 4区材料科学

Materials Letters Pub Date : 2026-05-01 Epub Date: 2026-02-09 DOI: 10.1016/j.matlet.2026.140158

Yusuke Morimoto , Hiroya Abe , Yoshikazu Suzuki

引用次数: 0

Phase engineering of MoS2 via Ar/O2 plasma treatment Ar/O2等离子体处理二硫化钼的相工程

IF 2.7 4区材料科学

Materials Letters Pub Date : 2026-05-01 Epub Date: 2026-02-06 DOI: 10.1016/j.matlet.2026.140225

Joonsoo Byeon, Ha Yeon Choi, Ju Yong Shin, Seung Ri Jeong, Shivam Kumar Gautam, Hi-Deok Lee

引用次数: 0

pH-driven biosynthesis of silver nanoparticles using Blumea lacera leaf extract with enhanced anti-inflammatory activity 利用具有增强抗炎活性的蓝草叶提取物进行ph驱动的纳米银生物合成

IF 2.7 4区材料科学

Materials Letters Pub Date : 2026-05-01 Epub Date: 2026-02-07 DOI: 10.1016/j.matlet.2026.140231

Sumon Ganguli , Md Abid Hasan , Sabonty Bhattacharjee , Suman Barua , Nakshi Saha , Sabbir Howlader , Sreebash Chandra Bhattacharjee , Farhana Rumzum Bhuiyan , Samiran Bhattacharjee

引用次数: 0

Research on hydrophilic-hydrophobic composite membrane materials for functional blood-brain barrier permeability organ-on-a-chip systems 功能血脑屏障通透性器官芯片系统亲疏水复合膜材料的研究

IF 2.7 4区材料科学

Materials Letters Pub Date : 2026-05-01 Epub Date: 2026-02-10 DOI: 10.1016/j.matlet.2026.140199

Wen Shen , Rong Wang , Fen Ao , Jiaru Hu , Pi Yan , Junyao Zhang , Xuemei Ge

引用次数: 0

Lanthanide-activated single-phosphor white light emission via Bi3+ → Eu3+ energy transfer in Ca₂Ga₂GeO₇ for next-generation LEDs 下一代led通过Ca₂Ga₂GeO₇中Bi3+→Eu3+能量转移的镧系激活单荧光粉白光发射

IF 2.7 4区材料科学

Materials Letters Pub Date : 2026-05-01 Epub Date: 2026-02-09 DOI: 10.1016/j.matlet.2026.140236

K.N. Chethana , Nitesh S. Kanojiya , Reshmi T.Parayil , S. Sreevalsa , Subrata Das , Manish Kumar Mishra , Santosh K. Gupta

{"title":"Lanthanide-activated single-phosphor white light emission via Bi3+ → Eu3+ energy transfer in Ca₂Ga₂GeO₇ for next-generation LEDs","authors":"K.N. Chethana , Nitesh S. Kanojiya , Reshmi T.Parayil , S. Sreevalsa , Subrata Das , Manish Kumar Mishra , Santosh K. Gupta","doi":"10.1016/j.matlet.2026.140236","DOIUrl":"10.1016/j.matlet.2026.140236","url":null,"abstract":"<div><div>We report the design and fabrication of Bi<sup>3+</sup> and Eu<sup>3+</sup> co-doped Ca<sub>2</sub>Ga<sub>2</sub>GeO<sub>7</sub> (CGGO) phosphors for high-performance warm-white light-emitting diodes (LEDs). The phosphor exhibits efficient Bi<sup>3+</sup> → Eu<sup>3+</sup> energy transfer, as evidenced by spectral overlap, enhanced Eu<sup>3+</sup> emission, and quenching of Bi<sup>3+</sup> emission with increasing Eu<sup>3+</sup> content. The emission color shifts from blue to red with increasing Eu<sup>3+</sup>, achieving near-white emission at 3% Eu<sup>3+</sup> (x = 0.33, y = 0.28) and a maximum energy transfer efficiency of 74% at 10% Eu<sup>3+</sup>. Incorporation into LEDs yields stable warm-white emission (CCT ∼2100 K) with good color rendering index and chromaticity, demonstrating suitability for high-temperature applications. These results establish CGGO:Bi<sup>3+</sup>+Eu<sup>3+</sup> phosphors as promising candidates for next-generation high-performance warm-white LEDs with tunable emission, excellent thermal stability, and practical applicability.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"410 ","pages":"Article 140236"},"PeriodicalIF":2.7,"publicationDate":"2026-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146187166","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