Scripta Materialia最新文献_第5页

Strong and ductile hetero-lamellar-structured alloy with a dual heterogeneous microstructure 具有双非均相组织的强韧性异质层状组织合金

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2026-04-01 Epub Date: 2026-01-15 DOI: 10.1016/j.scriptamat.2026.117177

Mingyang Wang , Yi Li , Yuanhang Gao , Pengting Li , Yinong Wang , Yi Tan

{"title":"Strong and ductile hetero-lamellar-structured alloy with a dual heterogeneous microstructure","authors":"Mingyang Wang , Yi Li , Yuanhang Gao , Pengting Li , Yinong Wang , Yi Tan","doi":"10.1016/j.scriptamat.2026.117177","DOIUrl":"10.1016/j.scriptamat.2026.117177","url":null,"abstract":"<div><div>High-strength, lamellar-structured Ni-Cr-Al alloys are critically important for industrial components, but their application is severely limited by an intrinsic brittleness originating from the rigid, non-deforming nature of the nano-scale α-Cr (BCC) lamellae. Here, we resolve this long-standing strength-ductility conflict by designing a “dual-heterostructure” that partitions the α-Cr strengthening phase into two functionally distinct morphologies: the original strength-providing nano-lamellae and the newly introduced, deformable submicron-scale globular particles. These submicron-scale particles uniquely capable of accommodating plasticity, acting as dynamic dislocation sinks to delocalize strain. This functional synergy activates a sustained, non-saturating hetero-deformation-induced (HDI) hardening, which continuously elevates the work-hardening rate. This unique mechanism produces an exceptional combination of an ultimate tensile strength over 1.5 GPa and a total elongation exceeding 17%. Our work demonstrates that engineering the deformability of a secondary hard phase, while preserving the primary strengthening backbone, offers a new and potent strategy for creating damage-tolerant, ultra-strong alloys.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"275 ","pages":"Article 117177"},"PeriodicalIF":5.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973928","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

Microstructural and mechanical response of cold-sprayed copper subjected to annealing 退火后冷喷涂铜的组织与力学响应

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2026-04-01 Epub Date: 2026-01-08 DOI: 10.1016/j.scriptamat.2025.117150

P.D. Unnikrishnan , M. Kamaraj , Christopher C. Berndt , Andrew Siao Ming Ang , Srinivasa Rao Bakshi

{"title":"Microstructural and mechanical response of cold-sprayed copper subjected to annealing","authors":"P.D. Unnikrishnan , M. Kamaraj , Christopher C. Berndt , Andrew Siao Ming Ang , Srinivasa Rao Bakshi","doi":"10.1016/j.scriptamat.2025.117150","DOIUrl":"10.1016/j.scriptamat.2025.117150","url":null,"abstract":"<div><div>Cold-sprayed copper coatings are characterized by a severely deformed, heterogeneous microstructure, resulting in inherent brittleness. This brittleness stems from weak interparticle bonding, micro-pores, high plastic strain and dislocation density along with fine dynamically recrystallized grains at interfaces, which facilitate easy crack propagation. While annealing treatments are known to enhance metallurgical bonding and induce recrystallization, a significant improvement in failure strain remains elusive even after complete recrystallization. The fundamental impact of annealing on this complex, severely deformed microstructure is not yet fully understood. This study presents an in-depth investigation into the microstructural evolution and mechanical properties of cold-sprayed copper across a range of annealing conditions. Hardness, microstructure, and thermal analysis studies show that recrystallization peaks are below 250 °C, with a relatively lower activation energy of 71 kJ.mol<sup>-1</sup>, indicative of high stored energy. The mechanism of bimodal grain size formation upon annealing is discussed, which is a primary factor limiting ductility.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"275 ","pages":"Article 117150"},"PeriodicalIF":5.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940465","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

Structural tuning of nanoporous metal via electrodeposition 电沉积纳米多孔金属的结构调谐

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2026-04-01 Epub Date: 2026-01-12 DOI: 10.1016/j.scriptamat.2026.117169

Yingji Sang , Liangyu Li , Jie Li , Qing Chen

引用次数: 0

The role of grain size distribution on the anomalous yielding of ultrafine-grained Au thin films 晶粒尺寸分布对超细晶金薄膜异常屈服的影响

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2026-04-01 Epub Date: 2026-01-15 DOI: 10.1016/j.scriptamat.2026.117178

Yichen Yang , Kunqing Ding , Ting Zhu , Josh Kacher , Olivier Pierron

引用次数: 0

Evolution of thermoelectric properties in Cu2-xSe films with ordered porous structures 有序多孔结构Cu2-xSe薄膜热电性能的演化

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2026-04-01 Epub Date: 2026-01-23 DOI: 10.1016/j.scriptamat.2026.117183

Shang Sun , Mingdi Lan , Guojian Li , Shiying Liu , Jingyi Zhu , Kai Wang , Qiang Wang

引用次数: 0

Rational design strategy for rare-earth monosilicate with tailored thermal behavior 具有定制热行为的稀土单硅酸盐的合理设计策略

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2026-04-01 Epub Date: 2026-01-22 DOI: 10.1016/j.scriptamat.2026.117185

Jiayi Xiong , Haoyu Wang , Guangheng Zhang , Xirui Lv , Jiemin Wang , Jie Zhang , Jingyang Wang

引用次数: 0

Realizing zero thermal expansion in NaSICON structure framework materials via controlling guest ions 通过控制客体离子实现NaSICON结构框架材料的零热膨胀

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2026-04-01 Epub Date: 2026-01-15 DOI: 10.1016/j.scriptamat.2026.117180

Hong Lian , Qi Miao , Xinwei Shi , Yilin Wang , Kaiyue Zhao , Juan Guo , Erjun Liang , Qilong Gao

{"title":"Realizing zero thermal expansion in NaSICON structure framework materials via controlling guest ions","authors":"Hong Lian , Qi Miao , Xinwei Shi , Yilin Wang , Kaiyue Zhao , Juan Guo , Erjun Liang , Qilong Gao","doi":"10.1016/j.scriptamat.2026.117180","DOIUrl":"10.1016/j.scriptamat.2026.117180","url":null,"abstract":"<div><div>Zero thermal expansion (ZTE) materials hold significant application potential in precision industrial equipment. Based on the design concept of average atomic volume, this study successfully constructed the K<em><sub>x</sub></em>Mg<em><sub>x</sub></em>In<sub>2-</sub><em><sub>x</sub></em>Mo<sub>3</sub>O<sub>12</sub>:0.15Yb<sup>3+</sup>/0.03Er<sup>3+</sup>(<em>x</em> = 0.4∼1.0) material series through innovative modifications to the NASICON-type structure. This was achieved by replacing the PO<sub>4</sub> tetrahedra (1.856Å<sup>3</sup>) in the conventional NZP framework with larger MoO<sub>4</sub> tetrahedra (3.099Å<sup>3</sup>) and introducing a K<sup>+</sup>-Mg<sup>2+</sup>/In<sup>3+</sup> combination to achieve charge balance and lattice expansion. This is attributed to the reduced K⁺ content enhancing the lateral vibrational ability of oxygen atoms, thereby counteracting thermal expansion; simultaneously, as the volumetric thermal expansion coefficient approaches zero, the thermally enhanced upconversion luminescence effect gradually intensifies. This study achieved controllable regulation of thermal expansion and obtained ZTE materials, providing new insight for elucidating the intrinsic relationship between thermal expansion and luminescence thermal enhancement.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"275 ","pages":"Article 117180"},"PeriodicalIF":5.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145973929","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

Anisotropic phase transformation of Cu6Sn5 driven by electromigration in lead-free solder joints 无铅焊点中电迁移驱动Cu6Sn5的各向异性相变

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2026-04-01 Epub Date: 2026-01-08 DOI: 10.1016/j.scriptamat.2025.117154

C. Li , H.Z. Zhang , X.Y. Li , Z.L. Ma , X.W. Cheng

{"title":"Anisotropic phase transformation of Cu6Sn5 driven by electromigration in lead-free solder joints","authors":"C. Li , H.Z. Zhang , X.Y. Li , Z.L. Ma , X.W. Cheng","doi":"10.1016/j.scriptamat.2025.117154","DOIUrl":"10.1016/j.scriptamat.2025.117154","url":null,"abstract":"<div><div>Electromigration (EM) effects on intermetallic compound evolution remain incompletely understood despite their critical role in solder joint reliability. Through correlated transmission electron microscopy (TEM) and ab initio molecular dynamics (AIMD) simulations of Sn-3.0Ag-0.5Cu solder joints under current stressing, we reveal for the first time that EM imposes crystallographic selection during η-to-η' transformation in Cu<sub>6</sub>Sn<sub>5</sub>—suppressing η' variants via electron-wind-aligned atomic migration while accelerating η' growth. Atomic-scale simulations establish that EM redirects this phase transformation via kinetically impeding atomic shuffling, as indicated by the elevated interfacial shear strain. This newly identified current-steered phase transformation represents a paradigm shift in understanding EM-induced damage—demonstrating that electric fields not only accelerate but also crystallographically constrain solid-state transformations in Cu<sub>6</sub>Sn<sub>5</sub> intermetallic. The resulting anisotropic η'-Cu<sub>6</sub>Sn<sub>5</sub> microstructures may concentrate degradation pathways, highlighting critical implications for reliability in high-current-density microelectronics where texture-dominated failure may emerge.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"275 ","pages":"Article 117154"},"PeriodicalIF":5.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940433","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

Boron-pnictogen donor-acceptor bonding as a perovskite design principle: DFT case study of quasi 0D A(BX3)2 (A=BeBH3, MgBH3; B=Sb, Bi; X=I) 硼-烟原给受体键合作为钙钛矿设计原理：准DFT案例研究a (BX3)2 （a =BeBH3, MgBH3； B=Sb, Bi； X=I）

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2026-04-01 Epub Date: 2026-01-07 DOI: 10.1016/j.scriptamat.2026.117166

R. Kevorkyants , D.S. Shtarev

{"title":"Boron-pnictogen donor-acceptor bonding as a perovskite design principle: DFT case study of quasi 0D A(BX3)2 (A=BeBH3, MgBH3; B=Sb, Bi; X=I)","authors":"R. Kevorkyants , D.S. Shtarev","doi":"10.1016/j.scriptamat.2026.117166","DOIUrl":"10.1016/j.scriptamat.2026.117166","url":null,"abstract":"<div><div>DFT study on the crystal structure and optoelectronic properties of hypothetical quasi 0D perovskites ABX<sub>3</sub> (<em>A</em>=BeBH<sub>3</sub>, MgBH<sub>3</sub>; <em>B</em>=Sb, Bi; <em>X</em> = <em>I</em>) is presented. They are predicted to be dynamically stable species with P1 spatial symmetry and electronic bandgaps in the range [1.77–1.95] eV. Electronic transitions shall occur between VBs (I<sup>-</sup>) and CBs (Sb<sup>3+</sup> or Bi<sup>3+</sup>) formed from <em>p</em>-electron orbitals. The computed charge density indicates a formation of donor-acceptor bond between vacant 2<em>p</em>-orbital of boron and valence s<sup>2</sup> lone electron pairs of the pnictogen cations. Atoms of the alkaline earth metals are not involved in chemical bonding and resemble noble gas atoms encapsulated in minerals. Thus, during a fictitious perovskite formation from the pnictogen iodides and BeBH<sub>3</sub> or MgBH<sub>3</sub> complexes the BH<sub>3</sub> molecule must recoordinate. This study demonstrates unusual donor-acceptor interactions in perovskites broadening our knowledge of their physico-chemical properties and paving the way to their prospective applications.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"275 ","pages":"Article 117166"},"PeriodicalIF":5.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940423","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

Elemental segregation-dependent γ″ nucleation on stacking faults during creep in 718Plus superalloy 718Plus高温合金蠕变过程中元素偏析依赖γ″成核

IF 5.6 2区材料科学

Scripta Materialia Pub Date : 2026-04-01 Epub Date: 2026-01-22 DOI: 10.1016/j.scriptamat.2026.117186

Shuan Ma , Jian Liu , Jingyu Zhang , Minqing Wang , Shaolan Wang , Yixuan He , Yiwei Ju , Huiling Duan , Jing Zhu

{"title":"Elemental segregation-dependent γ″ nucleation on stacking faults during creep in 718Plus superalloy","authors":"Shuan Ma , Jian Liu , Jingyu Zhang , Minqing Wang , Shaolan Wang , Yixuan He , Yiwei Ju , Huiling Duan , Jing Zhu","doi":"10.1016/j.scriptamat.2026.117186","DOIUrl":"10.1016/j.scriptamat.2026.117186","url":null,"abstract":"<div><div>In this study, we investigate the segregation behavior and interactions of stacking faults(SFs) and microtwins in the 718Plus under 650 °C/800 MPa and 730 °C/500 MPa by atomic-scale Z-contrast (High angle annular dark field image, HAADF) in combination with creep models. Our results reveal that creep deformation is dominated by SFs and microtwins, with pronounced Nb and Co enrichment alongside Al and Ni depletion at SFs sites. Furthermore, γ″-Ni<sub>3</sub>Nb precipitates nucleate preferentially at SFs intersections, suggesting a dynamic interplay between defect evolution and precipitation. A comparative analysis of microtwinning-based creep models and experimental data demonstrates that microtwinning in the γ' phase provides the dominant strengthening contribution, yielding a slip resistance of approximately 92.3 MPa-accounting for 62% of the total hardening. In stark contrast, γ″-induced hardening is negligible (∼0.15 MPa). These atomic-scale insights advance our understanding of creep mechanisms and γ″ precipitation in 718Plus superalloys, providing critical guidance for alloy design.</div></div>","PeriodicalId":423,"journal":{"name":"Scripta Materialia","volume":"275 ","pages":"Article 117186"},"PeriodicalIF":5.6,"publicationDate":"2026-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146034866","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