Materials Letters最新文献_第7页

Tailoring bainitic transformation and mechanical properties in high-strength steel via Mn-induced chemical heterogeneity mn诱导的高强度钢贝氏体相变及力学性能研究

IF 2.7 4区材料科学

Materials Letters Pub Date : 2025-09-27 DOI: 10.1016/j.matlet.2025.139583

Huifang Lan, Siyu Liu, Pengli Xu, Shuai Tang, Linxiu Du

{"title":"Tailoring bainitic transformation and mechanical properties in high-strength steel via Mn-induced chemical heterogeneity","authors":"Huifang Lan, Siyu Liu, Pengli Xu, Shuai Tang, Linxiu Du","doi":"10.1016/j.matlet.2025.139583","DOIUrl":"10.1016/j.matlet.2025.139583","url":null,"abstract":"<div><div>A composition-independent strategy was developed to modulate bainitic transformation and optimize mechanical properties in high-strength steel via engineered Mn chemical heterogeneity. Mn-depleted and Mn-enriched regions were introduced in fine-grained austenite through intercritical annealing and retained by rapid austenitization. This spatial heterogeneity accelerated initial bainite formation in Mn-depleted zones, while Mn-enriched regions stabilized austenite through Mn and C enrichment. The resulting microstructure exhibited refined bainitic laths, a higher volume fraction of film-like retained austenite, and suppressed formation of blocky martensite/austenite constituents along prior austenite grain boundaries. These features led to enhanced strength-ductility synergy through a sustained transformation-induced plasticity effect and delayed plastic instability. The results demonstrate that spatial control of chemical heterogeneity provides a practical and efficient route for tailoring transformation pathways and mechanical performance in bainitic steels without altering overall alloy composition.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"404 ","pages":"Article 139583"},"PeriodicalIF":2.7,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264481","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

Mechanical enhancement of fly ash syntactic foams via synergistic effects in lattice-reinforced three-phase composites 粉煤灰复合泡沫在点阵增强三相复合材料中的增效作用

IF 2.7 4区材料科学

Materials Letters Pub Date : 2025-09-27 DOI: 10.1016/j.matlet.2025.139577

Peng Wang , Wei Yu , Jiawen Li , Mai Zhang , Yu Bai , Endian Liu , Hai Hao

{"title":"Mechanical enhancement of fly ash syntactic foams via synergistic effects in lattice-reinforced three-phase composites","authors":"Peng Wang , Wei Yu , Jiawen Li , Mai Zhang , Yu Bai , Endian Liu , Hai Hao","doi":"10.1016/j.matlet.2025.139577","DOIUrl":"10.1016/j.matlet.2025.139577","url":null,"abstract":"<div><div>Fly ash, a byproduct of coal combustion, can be utilized to fabricate metallic matrix syntactic foams (MMSFs) due to its hollow microstructure and low density. However, the relatively low strength of fly ash limits the overall energy absorption capacity of the MMSFs. This study employed a two-step process of stir casting followed by infiltration casting to fabricate lattice-reinforced three-phase interpenetrating porous composites (IPCs), which exhibit well-bonded mechanical interlocking. The system integrated the high strength of lattice structures with the energy-absorption capacity of porous material. Quasi-static compression tests reveal that the synergistic effect of structural reinforcement from lattice architectures and interfacial bonding significantly enhanced mechanical performance. The IPCs demonstrate a maximum compressive strength of 106.3 MPa and specific energy absorption of 23.7 kJ·kg<sup>−1</sup>, representing improvements of 410.8 % and 59.1 %, respectively, compared to those of the baseline syntactic foam.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"404 ","pages":"Article 139577"},"PeriodicalIF":2.7,"publicationDate":"2025-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145264016","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

Selenium nanostructures grown on copper oxide nanoneedle for oxygen evolution reaction 在氧化铜纳米针上生长硒纳米结构用于析氧反应

IF 2.7 4区材料科学

Materials Letters Pub Date : 2025-09-26 DOI: 10.1016/j.matlet.2025.139572

T.V.M. Sreekanth , Taeyong Shin , B. Naresh , Juliano C. Denardin , J. Kim , K. Yoo

引用次数: 0

CO2 curing influence in alkali-activated Metakaolin/waste glass rejects systems 二氧化碳固化对碱活化偏高岭土/废玻璃废弃物处理系统的影响

IF 2.7 4区材料科学

Materials Letters Pub Date : 2025-09-26 DOI: 10.1016/j.matlet.2025.139562

S.J. Meza-Gómez , R.V. Silva , H. Colmenares-Cano , J. Ortiz-Palacios , T.E. González-Robles , D.E. Ramírez-Arreola

{"title":"CO2 curing influence in alkali-activated Metakaolin/waste glass rejects systems","authors":"S.J. Meza-Gómez , R.V. Silva , H. Colmenares-Cano , J. Ortiz-Palacios , T.E. González-Robles , D.E. Ramírez-Arreola","doi":"10.1016/j.matlet.2025.139562","DOIUrl":"10.1016/j.matlet.2025.139562","url":null,"abstract":"<div><div>This study analyses the performance of alkali-activated metakaolin/waste glass rejects at mass ratios of 100:0, 90:10, and 80:20, to increase internal Si/Al ratios of the precursor, using NaOH and Na<sub>2</sub>SiO<sub>3</sub>∙5H<sub>2</sub>O-based alkaline solutions. The specimens underwent a performance-enhancing accelerated carbonation-based curing regimen and were compared to specimens left uncarbonated. X-ray diffraction results showed that metakaolin and waste glass were highly amorphous, which led to essentially non-crystalline aluminosilicate gels. Exposure to CO<sub>2</sub> enhanced compressive strength by ∼40 % partly due to densification from additional CaCO<sub>3</sub> precipitation. The materials' mechanical performance was negatively affected by glass addition, whereas minimal changes were observed from the use of Na<sub>2</sub>SiO<sub>3</sub>∙5H<sub>2</sub>O-containing activators. Low dimensional stability was observed due to extremely high water demand of metakaolin, leading to high shrinkage strains and mitigated by glass addition.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"404 ","pages":"Article 139562"},"PeriodicalIF":2.7,"publicationDate":"2025-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227831","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

Synergistic effects of confinement structure and expanded interlayer spacing on MoS2/C towards high-efficient rate and cycle performance 约束结构和扩展层间距对MoS2/C高效倍率和循环性能的协同效应

IF 2.7 4区材料科学

Materials Letters Pub Date : 2025-09-26 DOI: 10.1016/j.matlet.2025.139536

Yu Fu , Renhong Song , Kun Zhang , Yujun Chen , Lijun Chen , Qianqiu Tian , Wenbin Hu

引用次数: 0

Encapsulating sulfur with a turbostatic carbon matrix and carbon nanotubes for enhanced capacity and operating voltage in thermal batteries 用涡轮静压碳基质和碳纳米管封装硫，以提高热电池的容量和工作电压

IF 2.7 4区材料科学

Materials Letters Pub Date : 2025-09-25 DOI: 10.1016/j.matlet.2025.139540

Dohun Kim , Jimin Kwon , Wonjun Ahn , Jae-Seong Yeo , Yusong Choi , Sangbaek Park

{"title":"Encapsulating sulfur with a turbostatic carbon matrix and carbon nanotubes for enhanced capacity and operating voltage in thermal batteries","authors":"Dohun Kim , Jimin Kwon , Wonjun Ahn , Jae-Seong Yeo , Yusong Choi , Sangbaek Park","doi":"10.1016/j.matlet.2025.139540","DOIUrl":"10.1016/j.matlet.2025.139540","url":null,"abstract":"<div><div>The demand for higher energy and power densities in thermal batteries necessitates the development of advanced cathode materials. Although sulfur offers a high theoretical capacity, its low electrical conductivity and thermal instability limit its practical use. Herein, we present a SPAN-CNT composite cathode, comprising sulfur embedded in a turbostratic carbon matrix derived from polyacrylonitrile (SPAN) and uniformly wrapped with carbon nanotubes (CNTs). The composite achieves high conductivity (0.39 S cm<sup>−1</sup>) through a percolating CNT network and exhibits thermal stability up to 500 °C due to strong covalent S<img>C bonding. In thermal battery tests, SPAN-CNT cathode exhibits an open-circuit voltage of 2.0 V, higher than that of conventional FeS<sub>2</sub> (1.9 V). It delivers a high capacity of 5972 As g<sup>−1</sup>, significantly surpassing FeS<sub>2</sub> (2006 As g<sup>−1</sup>). These results underscore the potential of SPAN-CNT as a next-generation cathode for high-performance thermal batteries.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"404 ","pages":"Article 139540"},"PeriodicalIF":2.7,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145227824","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

Investigation of Cu segregation in cast Ti-5Cu alloys 铸态Ti-5Cu合金中Cu偏析的研究

IF 2.7 4区材料科学

Materials Letters Pub Date : 2025-09-25 DOI: 10.1016/j.matlet.2025.139468

Jin-Tao Zou , Yong-Dong He , Xu Yue

引用次数: 0

Interfacial Engineering of FTO/TiO2 Bilayer for Improved charge separation in BiVO4 photoanodes 改善BiVO4光阳极电荷分离的FTO/TiO2双分子层界面工程

IF 2.7 4区材料科学

Materials Letters Pub Date : 2025-09-25 DOI: 10.1016/j.matlet.2025.139485

Suyoung Jang, Mayur A. Gaikwad, Dhanaji B. Malavekar, Fang Zheng, Zhenhua Fang, Youngrog Kim, Suin Jeong, Jin Hyeok Kim

{"title":"Interfacial Engineering of FTO/TiO2 Bilayer for Improved charge separation in BiVO4 photoanodes","authors":"Suyoung Jang, Mayur A. Gaikwad, Dhanaji B. Malavekar, Fang Zheng, Zhenhua Fang, Youngrog Kim, Suin Jeong, Jin Hyeok Kim","doi":"10.1016/j.matlet.2025.139485","DOIUrl":"10.1016/j.matlet.2025.139485","url":null,"abstract":"<div><div>To advance next-generation photoanodes for solar-driven water splitting, innovative strategies to enhance surface catalysis and charge transport are essential. Among various photoanode materials, bismuth vanadate (BiVO<sub>4</sub>) stands out as a promising candidate not only for enhanced photoelectrochemical (PEC) performance but also for being eco-friendly. Herein, a TiO<sub>2</sub> underlayer was deposited on fluorine-doped tin oxide (FTO) substrates to fabricate FTO/TiO<sub>2</sub>/BiVO<sub>4</sub> heterojunctions, thereby enhancing the electrical properties of the photoanode. Additionally, the simplest Fenton-like deposition method was employed to deposit NiFeOOH overlayer on BiVO<sub>4</sub>. As a result, the FTO/TiO<sub>2</sub>/BiVO<sub>4</sub>/NiFeOOH photoanode achieved the remarkable photocurrent density of 1.73 mA/cm<sup>2</sup> and ABPE(%) of 0.432 %. These findings demonstrate that the TiO<sub>2</sub> underlayer significantly increases the charge transport by suppressing surface recombination, thereby advancing the PEC performance of BiVO<sub>4</sub>-based photoanode.</div></div>","PeriodicalId":384,"journal":{"name":"Materials Letters","volume":"404 ","pages":"Article 139485"},"PeriodicalIF":2.7,"publicationDate":"2025-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145263915","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

Improved interfacial and electrochemical properties of CFRP via nano-Fe2O3 coated carbon fibers 纳米fe2o3包覆碳纤维改善CFRP的界面性能和电化学性能

IF 2.7 4区材料科学

Materials Letters Pub Date : 2025-09-22 DOI: 10.1016/j.matlet.2025.139557

Min Xie , Lihua Zhan , Bolin Ma , Zheng Cao , Ruitong Yu

引用次数: 0

Zinc orthostannate nanorods assembled into coral-like clusters with improved acetone gas sensitivity and selectivity 正锡酸锌纳米棒组装成珊瑚状簇，具有提高的丙酮气体敏感性和选择性

IF 2.7 4区材料科学

Materials Letters Pub Date : 2025-09-18 DOI: 10.1016/j.matlet.2025.139529

Chaofu Zhang , Liji Su , Changyun Li , Lei Xu , Heliang Fan , Hanzhuo Zhang

引用次数: 0