Scripta Materialia最新文献_第9页

Mechanism on lattice thermal conductivity of carbon-vacancy and porous medium entropy ceramics

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-01-21 DOI: 10.1016/j.scriptamat.2025.116568

Xianteng Zhou , Yuanji Xu , Yue Chen , Fuyang Tian

引用次数: 0

Quenching induced depolarization delay and structure evolution in (1-x)Na1/2Bi1/2TiO3-xBiFeO3 ceramics

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-01-21 DOI: 10.1016/j.scriptamat.2025.116573

Pengrong Ren , Wenchao Lin , Zhihong Luo , Mao-Hua Zhang , Laijun Liu , Changbai Long , Lixue Zhang

{"title":"Quenching induced depolarization delay and structure evolution in (1-x)Na1/2Bi1/2TiO3-xBiFeO3 ceramics","authors":"Pengrong Ren , Wenchao Lin , Zhihong Luo , Mao-Hua Zhang , Laijun Liu , Changbai Long , Lixue Zhang","doi":"10.1016/j.scriptamat.2025.116573","DOIUrl":"10.1016/j.scriptamat.2025.116573","url":null,"abstract":"<div><div>As a relaxor, Na<sub>1/2</sub>Bi<sub>1/2</sub>TiO<sub>3</sub> (NBT) presents limitations in high temperature application because of thermally induced depolarization. Stabilizing the polar ferroelectric phase is key for deferring the temperature dependent depolarization. In this work, a transition from relaxor to ferroelectric is induced by incorporating BiFeO<sub>3</sub> (BFO) in NBT. The transition is characterized by temperature dependent dielectric and piezoelectric properties, and supported by mechanical stress-strain tests and <em>in-situ</em> electric field dependent synchrotron XRD analysis. To improve the depolarization temperature (<em>T</em><sub>d</sub>) further, 40NBT-60BFO (60BFO) is subject to a quenching treatment. <em>T</em><sub>d</sub> of 60BFO increases from 300 °C to 520 °C upon quenching. The significant increase in <em>T</em><sub>d</sub> is explained by analyzing the average and local structure changes. It is found that the ordered Bi and Na ions and the intensified Bi-O bonding upon quenching contribute to the increase in <em>T</em><sub>d</sub>. This work clarifies the mechanism of quenching induced enhancement <em>T</em><sub>d</sub> in NBT-BFO ceramics.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"259 ","pages":"Article 116573"},"PeriodicalIF":5.3,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171175","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Effect of WC/WC grain boundary misorientation angle on the local hardness in WC–Co cemented carbides

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-01-20 DOI: 10.1016/j.scriptamat.2024.116525

Hansheng Chen , Haoruo Zhou , Xiangyuan Cui , Christoph Czettl , Thomas Weirather , Julia Pachlhofer , Pauline Mueller , Tamara Teppernegg , Ralph Useldinger , Sophie Primig , Simon P. Ringer

{"title":"Effect of WC/WC grain boundary misorientation angle on the local hardness in WC–Co cemented carbides","authors":"Hansheng Chen , Haoruo Zhou , Xiangyuan Cui , Christoph Czettl , Thomas Weirather , Julia Pachlhofer , Pauline Mueller , Tamara Teppernegg , Ralph Useldinger , Sophie Primig , Simon P. Ringer","doi":"10.1016/j.scriptamat.2024.116525","DOIUrl":"10.1016/j.scriptamat.2024.116525","url":null,"abstract":"<div><div>Grain boundaries (GBs) generally exhibit complex structural and compositional features that significantly affect material hardness. Here, we establish a methodology to correlate the local hardness contributions of the GBs with their frequency distribution and their structural and compositional characteristics, using a submicron WC–Co cemented carbide as a model. An exceptional local hardness of (14.68 ± 0.12) GPa is observed from a 90° WC<sub>{0001}</sub>/WC<sub>{10</sub><span><math><msub><mrow></mrow><mover><mn>1</mn><mo>¯</mo></mover></msub></math></span><sub>0}</sub> GB, unlike the low contributions from other WC/WC GBs. This is linked to pronounced Cr and Co segregation at this GB, due to Cr affinity at the WC<sub>{0001}</sub>/Co and WC<sub>{10</sub><span><math><msub><mrow></mrow><mover><mn>1</mn><mo>¯</mo></mover></msub></math></span><sub>0}</sub>/Co phase boundaries and Co infiltration during liquid-phase sintering. Density functional theory results indicate that a large lattice mismatch, strong W–C covalent bonding, and Cr and Co accumulation increase the elastic strain field, resulting in strong atomic distortion near the interface and contributing to exceptional strengthening. Our findings highlight the critical influence of GB complexities on material hardness.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"259 ","pages":"Article 116525"},"PeriodicalIF":5.3,"publicationDate":"2025-01-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171171","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Nanoindentation reveals universal scaling of pop-in plasticity in metallic glasses

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-01-20 DOI: 10.1016/j.scriptamat.2025.116549

Yu Chen , Zhen-Xing Bo , Hong Bo Zhou , Bao-An Sun , Yong Hao Sun , Robert Maaß , Wei Hua Wang

引用次数: 0

Atomic disorder in AlFeNiV multi-component alloys and its effect on the magnetic properties

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-01-18 DOI: 10.1016/j.scriptamat.2025.116567

Chuangshi Feng , Hongquan Song , Shuai Nan , Zhou Guan , Meng Xiao , Hengyong Yang , Yu Tang , Kai Zeng , Xin Yuan , Fuxiang Zhang

{"title":"Atomic disorder in AlFeNiV multi-component alloys and its effect on the magnetic properties","authors":"Chuangshi Feng , Hongquan Song , Shuai Nan , Zhou Guan , Meng Xiao , Hengyong Yang , Yu Tang , Kai Zeng , Xin Yuan , Fuxiang Zhang","doi":"10.1016/j.scriptamat.2025.116567","DOIUrl":"10.1016/j.scriptamat.2025.116567","url":null,"abstract":"<div><div>Order-disorder transition presents a pivotal and intricate challenge in materials science. In this work, AlFeNiV multi-component alloys were prepared with distinct heat treatment processes (named as-cast, spin, and anneal) to investigate the order-disorder transitions, local lattice distortion and their effect on the magnetic characteristics. Phase structure analysis demonstrates that the AlFeNiV alloy with a Heusler structure undergoes a distinctive phase transition from L2<sub>1</sub> to B2 structure at around 1000 °C. Local lattice structure analysis reveals that all the three samples exhibit a tensile stress state, with the annealed sample exhibiting a lower local lattice distortion. Quantitative atomic occupancy analysis indicates that the spin sample has a lower degree of ordering and exhibits comparatively stronger magnetic properties, which are attributed to the formation of antisite defects between the <em>4b</em> and <em>8c</em> sites. This work provides a scientific understanding for the design of advanced alloys with predicted properties by using defect engineering.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"259 ","pages":"Article 116567"},"PeriodicalIF":5.3,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171169","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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

Unusual deformation behavior and the consequent emergence of Type C serrations in Fe-1.6Mn-2Ni-1.4Si-0.4C steels

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-01-17 DOI: 10.1016/j.scriptamat.2025.116563

Myeong-heom Park , Sukyoung Hwang , Yoshitaka Okitsu , Nobuhiro Tsuji

引用次数: 0

Evading crystallization in bulk metallic glass produced under ultra-high flow velocity

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-01-17 DOI: 10.1016/j.scriptamat.2025.116564

Le-hua Liu , Jingsi Chen , Liuqing Chen , Jiting Zhai , Kuan Gao , Xuguang Zhu , Weiwen Zhang , Chao Yang

{"title":"Evading crystallization in bulk metallic glass produced under ultra-high flow velocity","authors":"Le-hua Liu , Jingsi Chen , Liuqing Chen , Jiting Zhai , Kuan Gao , Xuguang Zhu , Weiwen Zhang , Chao Yang","doi":"10.1016/j.scriptamat.2025.116564","DOIUrl":"10.1016/j.scriptamat.2025.116564","url":null,"abstract":"<div><div>High flow velocity has been shown to accelerate crystallization in various supercooled liquids, including metallic glass, although the underlying mechanisms remain unclear. This study explores the solidification behavior of the Zr<sub>58.5</sub>Cu<sub>15.6</sub>Ni<sub>12.8</sub>Al<sub>10.3</sub>Nb<sub>2.8</sub> (Vit 106a) metallic glass under varying casting flow velocities. Remarkably, our findings reveal that the primary cause of flow-induced crystallization (FIC) is high strain rates, generated by mold collisions, rather than the flow velocity itself. FIC can be evaded by reducing the strain rate without a decrease in the flow velocity of the melt during the filling process. These findings not only clarify the origins of FIC in glass-forming liquids but also provide a new approach to addressing the conflict between the demand for ultra-high flow velocity in casting complex, ultra-thin metallic glasses and the tendency for FIC, offering valuable insights for the design and processing of metallic glass components for large-scale applications.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"259 ","pages":"Article 116564"},"PeriodicalIF":5.3,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143171173","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 thermodynamic approach to modeling multicomponent FeTi-based alloys for hydrogen storage

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-01-16 DOI: 10.1016/j.scriptamat.2024.116516

Ebert Alvares , Andrew J.E. Rowberg , Kai Sellschopp , Brandon C. Wood , Thomas Klassen , Paul Jerabek , Claudio Pistidda

{"title":"A thermodynamic approach to modeling multicomponent FeTi-based alloys for hydrogen storage","authors":"Ebert Alvares , Andrew J.E. Rowberg , Kai Sellschopp , Brandon C. Wood , Thomas Klassen , Paul Jerabek , Claudio Pistidda","doi":"10.1016/j.scriptamat.2024.116516","DOIUrl":"10.1016/j.scriptamat.2024.116516","url":null,"abstract":"<div><div>Modeling the impact of alloying on the hydrogenation properties of intermetallic compounds is a vital yet challenging task for hydrogen storage materials design: not only do these processes occur under thermodynamic para-equilibrium conditions, but for bcc-derived compounds, the task is further complicated through varying composition-dependent ordering transitions. Here, we tackle these challenges by providing a multicomponent thermodynamic modeling framework for FeTi, a representative bcc-derived material class, which is one of the most relevant room-temperature interstitial metal hydrides. We aim specifically to describe para-equilibrium in FeTi-based multicomponent hydrides while ensuring compatibility with previously evaluated metallic systems. DFT point-defect calculations provide a physics-informed foundation to identify substitutional site preferences. Not only does our approach give detailed guidance for the selection of model parameters to evaluate phase equilibria for a broad range of FeTi-based multicomponent systems with high fidelity, but it also can be easily adopted to other interstitial hydrogen storage compounds.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"259 ","pages":"Article 116516"},"PeriodicalIF":5.3,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143170199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Origin of premature fracture and enhancement of superelasticity in laser additively manufactured Ni-rich NiTi metamaterials

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-01-16 DOI: 10.1016/j.scriptamat.2025.116558

Zhaorui Yan , Jia-Ning Zhu , Yi-Chieh Yang , Hans Brouwer , Ton Riemslag , Joerg R. Jinschek , Marcel Hermans , Jovana Jovanova , Vera Popovich

{"title":"Origin of premature fracture and enhancement of superelasticity in laser additively manufactured Ni-rich NiTi metamaterials","authors":"Zhaorui Yan , Jia-Ning Zhu , Yi-Chieh Yang , Hans Brouwer , Ton Riemslag , Joerg R. Jinschek , Marcel Hermans , Jovana Jovanova , Vera Popovich","doi":"10.1016/j.scriptamat.2025.116558","DOIUrl":"10.1016/j.scriptamat.2025.116558","url":null,"abstract":"<div><div>Superelastic metamaterials have attracted significant attention recently, but achieving such functionality remains challenging due to partial superelasticity and premature fracture in additively manufactured components. To address these issues, this study investigates the premature fracture in Ni-rich NiTi metamaterials fabricated by laser powder bed fusion. A comparative analysis of two structures (Gyroid network and Diamond shell) reveals that the structural stability of bending- and stretching-dominated structures is reversed compared to typical elastic-plastic response, due to the tension-compression asymmetry of base NiTi. The premature fracture and partial superelasticity of these as-fabricated samples are attributed to low deformation ability for accommodating tensile stress. Based on these findings, a heat treatment introducing Ni<sub>4</sub>Ti<sub>3</sub> precipitates was employed, successfully achieving macroscopic superelasticity in the NiTi metamaterials, with consistency between model prediction and experiments.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"259 ","pages":"Article 116558"},"PeriodicalIF":5.3,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143170005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quantifying the local compositional fluctuation and Shannon entropy inherent in multi-principal element alloys

IF 5.3 2区材料科学

Scripta Materialia Pub Date : 2025-01-16 DOI: 10.1016/j.scriptamat.2025.116559

Miaoran Zhang , Bozhao Zhang , Jun Ding , Evan Ma

引用次数: 0