IF 2.2 3区工程技术

Micron Pub Date : 2026-03-01 Epub Date: 2025-12-11 DOI: 10.1016/j.micron.2025.103982

Douglas G. Ivey , Peter Schamuhn Kirk , Tailin Ren , Junfang Lu

引用次数: 0

In-depth analysis of grain structure of heavily-deformed multilayered composites by electron backscattered diffraction 电子背散射衍射对大变形多层复合材料晶粒结构的深入分析。

IF 2.2 3区工程技术

Micron Pub Date : 2026-03-01 Epub Date: 2025-11-30 DOI: 10.1016/j.micron.2025.103976

Luo Sung Hong , Fu-ming Xiaoyu

{"title":"In-depth analysis of grain structure of heavily-deformed multilayered composites by electron backscattered diffraction","authors":"Luo Sung Hong , Fu-ming Xiaoyu","doi":"10.1016/j.micron.2025.103976","DOIUrl":"10.1016/j.micron.2025.103976","url":null,"abstract":"<div><div>The variation of texture, grain size, grain boundaries, and hardness of the composite layers has been examined at different deformation passes and regions of the Cu (matrix)–Mg (reinforcement) composite and the Mg (matrix)–Cu (reinforcement) composite. The multilayered composites were processed by the accumulative roll bonding (ARB) method. With the rise of ARB passes, the layers became wavy, then necked, and were finally broken into smaller layers. Rolling texture and shear texture were the predominant textures in the rolled composites. The rolling texture grew with increasing ARB pass. Also, the intensity of the shear texture increased in regions closer to the surfaces. Furthermore, a grain size decrement was observed in all layers, even though the Cu layer in the Cu/Mg/Cu and the Mg layer in the Mg/Cu/Mg showed finer grains than when these layers were used as inner layers. Additionally, the grain sizes gradually increased from near-surface regions to near-center regions. Based on kernel average misorientation (KAM) images, more evident strain was accumulated near boundaries in regions closer to the surfaces. Furthermore, the hardness measurements showed a reduction from the composite’s surface to the composite’s center, although all matrix and reinforcing layers showed an increase in hardness with increasing ARB pass.</div></div>","PeriodicalId":18501,"journal":{"name":"Micron","volume":"202 ","pages":"Article 103976"},"PeriodicalIF":2.2,"publicationDate":"2026-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145743302","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structural characterization of non-bead freshwater cultured pearls using X-ray transmission imaging and micro-computed tomography 利用x射线透射成像和微计算机断层扫描技术研究淡水养殖珍珠的结构特征。

IF 2.2 3区工程技术

Micron Pub Date : 2026-02-01 Epub Date: 2025-11-05 DOI: 10.1016/j.micron.2025.103954

Zelong Chen , Zhonghua Song , Jun Su , Jing Bao , Songsong Zhou , Xiaoming Chen , Jinhong Cai , Yuan Sun

{"title":"Structural characterization of non-bead freshwater cultured pearls using X-ray transmission imaging and micro-computed tomography","authors":"Zelong Chen , Zhonghua Song , Jun Su , Jing Bao , Songsong Zhou , Xiaoming Chen , Jinhong Cai , Yuan Sun","doi":"10.1016/j.micron.2025.103954","DOIUrl":"10.1016/j.micron.2025.103954","url":null,"abstract":"<div><div>To overcome the limitations in current identification techniques for non-bead freshwater cultured pearls(NFC), this study employed X-ray transmission imaging (RTX) and micro-computed tomography (μ-CT) to analyze the internal structures of 45 near-round or baroque NFC, aiming to reveal the correlation between their internal structural characteristics and cultivation origins. The experimental results demonstrate that void structures are universally present in the growth centers of NFC, which can be classified into five morphological types (tiny crack-like voids, tiny rod-like voids, multi-void complex, large crack-like voids, and large rod-like voids). Notably, larger voids were exclusively observed in baroque samples and showed structural similarities to non-bead saltwater cultured pearls (\"keshi\" pearls), suggesting their formation results from expelled nuclei during cultivation. In contrast, natural saltwater pearls predominantly exhibit compact structures with only 6 % showing central voids, presenting a distinct difference from NFC. While non-bead saltwater cultured pearls display void characteristics overlapping with some freshwater samples, their identification requires comprehensive analysis incorporating additional features. This study not only expands the structural database of NFC but also provides a scientific basis for reliable origin authentication.</div></div>","PeriodicalId":18501,"journal":{"name":"Micron","volume":"201 ","pages":"Article 103954"},"PeriodicalIF":2.2,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145513326","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Extracting TEM lamellae from micro/nano particles through a thin film embedding strengthened FIB approach 采用薄膜包埋强化FIB法从微纳颗粒中提取TEM片层。

IF 2.2 3区工程技术

Micron Pub Date : 2026-02-01 Epub Date: 2025-10-27 DOI: 10.1016/j.micron.2025.103943

Bo Deng , Li Lei , Lei Wang , Shanjian Li , Ke Xu , Jing Zhang , Fuxue Yan , Caiyin You

{"title":"Extracting TEM lamellae from micro/nano particles through a thin film embedding strengthened FIB approach","authors":"Bo Deng , Li Lei , Lei Wang , Shanjian Li , Ke Xu , Jing Zhang , Fuxue Yan , Caiyin You","doi":"10.1016/j.micron.2025.103943","DOIUrl":"10.1016/j.micron.2025.103943","url":null,"abstract":"<div><div>A cross-sectional lamella in thickness around 20 ∼ 100 nm is essential for (S)TEM characterizations of micro/nano particles with compositional gradients or structural inhomogeneity including core shell, surface doped and coated structures, or those with excessive thickness in one or more dimensions. Focused ion beam (FIB) remains as the most reliable technique for extracting site-specific, thin cross-sectional TEM samples. However, conventional bulk epoxy resin embedding often compromises precision for site-specific processing due to particle aggregation with surrounded bubble defects resulting in particle detachment, poor observability, and failed sample preparation under ion beam milling. In this paper, we have proposed a thin film embedding-strengthened focused ion beam (FES-FIB) technique to improve precision for site-specific and mitigate particles detachment during ion beam milling, enabling precise extraction of ultra-thin lamellae for (S)TEM characterization. Consequently, the feasibility of this FES-FIB process is verified by site-specific extraction of the cross-sectional lamellae from two typical structures: spherical microparticles and nanoflakes, successfully collecting the morphology and structural details by (S)TEM.</div></div>","PeriodicalId":18501,"journal":{"name":"Micron","volume":"201 ","pages":"Article 103943"},"PeriodicalIF":2.2,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145422399","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Loss of coherence in a magnetic electron lens due to spin rotation 自旋引起的磁性电子透镜中相干性的丧失

IF 2.2 3区工程技术

Micron Pub Date : 2026-02-01 Epub Date: 2025-11-22 DOI: 10.1016/j.micron.2025.103964

Hiroshi Okamoto

引用次数: 0

Analysis of 4D-STEM methods for detecting metallic nanoparticles in amorphous ice: A numerical study 非晶冰中金属纳米颗粒的4D-STEM检测方法分析：数值研究

IF 2.2 3区工程技术

Micron Pub Date : 2026-02-01 Epub Date: 2025-11-09 DOI: 10.1016/j.micron.2025.103956

Gearóid Mangan (Writing – review & editing, Writing – original draft, Visualization, Validation, Software, Methodology, Investigation, Formal analysis) , Andrew Stewart (Writing – review & editing, Writing – original draft, Supervision, Software, Project administration, Methodology, Funding acquisition, Formal analysis, Conceptualization)

引用次数: 0

A systematic quantification method on intermetallic distribution in Aluminum 6061 with scanning electron microscopy and automation 用扫描电镜和自动化系统定量分析6061铝中金属间化合物的分布

IF 2.2 3区工程技术

Micron Pub Date : 2026-02-01 Epub Date: 2025-10-15 DOI: 10.1016/j.micron.2025.103938

Yinuo Li , Sabrina Clusiau , Nicolas Brodusch , Pascal Gauthier , Nicolas Piché , Raynald Gauvin

{"title":"A systematic quantification method on intermetallic distribution in Aluminum 6061 with scanning electron microscopy and automation","authors":"Yinuo Li , Sabrina Clusiau , Nicolas Brodusch , Pascal Gauthier , Nicolas Piché , Raynald Gauvin","doi":"10.1016/j.micron.2025.103938","DOIUrl":"10.1016/j.micron.2025.103938","url":null,"abstract":"<div><div>While previous research has focused on the size and number of intermetallic compounds and their impact on mechanical properties, more attention should be given to their locational distribution relative to microstructural features. This paper demonstrated a novel automated and efficient workflow for quantitatively analyzing the distribution of intermetallic compounds in Aluminum 6061, especially the distance distribution towards representative microstructural features such as grain boundaries. High-resolution scanning electron microscopy is utilized to characterize microstructures with automated capturing to improve efficiency and acquire large volumes of microstructure data, obtaining more comprehensive results. Automated segmentation integrates watershed and deep learning U-Net models to identify grains and bimodal-size intermetallics across the extensive microstructural datasets. The results indicate that micron-scale intermetallic compounds tend to aggregate near grain boundaries. While nanoscale intermetallics are slightly more loosely distributed, they remain close to grain boundaries and the primary large intermetallics. Meanwhile, within each size category, intermetallic compounds with larger sizes and less elongated shapes tend to be more densely distributed closer to grain boundaries. The newly developed method is largely automated and has proven feasibility and high efficiency in microstructural feature analysis.</div></div>","PeriodicalId":18501,"journal":{"name":"Micron","volume":"201 ","pages":"Article 103938"},"PeriodicalIF":2.2,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145365836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effects of extracellular calcium ion on the germination of Gelidium floridanum (Rhodophyta, Gelidiales) tetraspores 细胞外钙离子对花莲四孢子萌发的影响。

IF 2.2 3区工程技术

Micron Pub Date : 2026-02-01 Epub Date: 2025-10-26 DOI: 10.1016/j.micron.2025.103942

Fernanda Bouvie , Débora Tomazi Pereira , Luciane Cristina Ouriques , Rodrigo Costa Puerari , Willian Gerson Matias , Leila Hayashi , Carmen Simioni

{"title":"Effects of extracellular calcium ion on the germination of Gelidium floridanum (Rhodophyta, Gelidiales) tetraspores","authors":"Fernanda Bouvie , Débora Tomazi Pereira , Luciane Cristina Ouriques , Rodrigo Costa Puerari , Willian Gerson Matias , Leila Hayashi , Carmen Simioni","doi":"10.1016/j.micron.2025.103942","DOIUrl":"10.1016/j.micron.2025.103942","url":null,"abstract":"<div><div><em>Gelidium</em> species cultivation is rare because establishing one methodology is difficult, or even when this is possible, the application to the field can be a challenge. These difficulties are associated with the low growth rates related to the availability of nutrients in culture media. The goal of this study was to observe the role of extracellular calcium on spore germination. We investigated the effects of EGTA (a calcium-chelating agent) and CaCl₂ (a source of extracellular calcium) in the germination of <em>Gelidium floridanum</em> tetraspores. Tetraspores were cultivated with EGTA and CaCl<sub>2</sub> for 6 h when the germ tube formation process was initiated. Adhesion, germination rate, and morphology analysis of the tetraspores were performed by light microscopy; analysis of actin filaments and cell wall (cellulose) by confocal scanning laser microscopy; and ultrastructure analysis by transmission electron microscopy (TEM). There was no germination of tetraspores, and adhesion was reduced when treated with EGTA. A higher germination rate and acceleration of this process was observed when treated with CaCl<sub>2</sub>, indicating that germination and adhesion are calcium-dependent. Tetraspores treated with EGTA show no cell wall formation or polarization of actin filaments, confirmed by TEM, indicating interference with intracellular calcium homeostasis and disorganization of organelles. These results contrasted with those observed in CaCl<sub>2</sub> treatment, where a small amount of extracellular calcium accelerates the germinative process. Based on these results, we conclude that this species has the germination dependent on extracellular Ca<sup>2 +</sup> influx, and its suppression may cause the interruption of Ca<sup>2+</sup>-dependent signaling required for tetraspores germination.</div></div>","PeriodicalId":18501,"journal":{"name":"Micron","volume":"201 ","pages":"Article 103942"},"PeriodicalIF":2.2,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145422385","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Structure of metal-organic framework nanocrystals obtained from electron diffraction data by iterative phase retrieval 基于电子衍射数据的金属-有机骨架纳米晶体结构的迭代相位反演

IF 2.2 3区工程技术

Micron Pub Date : 2026-02-01 Epub Date: 2025-11-21 DOI: 10.1016/j.micron.2025.103960

Tatiana E. Gorelik , Tatiana Latychevskaia , Irena Senkovska , Mariia Maliuta , Stefan Kaskel , Ute Kaiser

引用次数: 0

Automated grain analysis via data augmentation and grain boundary detection 通过数据增强和晶界检测实现自动晶粒分析。

IF 2.2 3区工程技术

Micron Pub Date : 2026-02-01 Epub Date: 2025-11-21 DOI: 10.1016/j.micron.2025.103961

Zhihao Gao , Yintao Zhou

{"title":"Automated grain analysis via data augmentation and grain boundary detection","authors":"Zhihao Gao , Yintao Zhou","doi":"10.1016/j.micron.2025.103961","DOIUrl":"10.1016/j.micron.2025.103961","url":null,"abstract":"<div><div>This study presents an AI-enhanced framework to address key challenges in the quantitative metallographic analysis of pure iron systems. Manual grain size characterization suffers from limited efficiency and reproducibility, while existing computational methods are constrained by scarce data and incomplete grain boundary detection. To overcome these issues, we propose three core innovations. First, a three-stage data synthesis pipeline is developed, incorporating stochastic grain mask generation via denoising diffusion probabilistic models (DDPM) and microstructural translation using a conditional adversarial network, enabling the generation of physically consistent metallographic images. Second, a deep neural network based on a U-Net architecture is trained on a paired and reconstructed dataset, where the topology-awareness emerges from the data pairing and reconstruction objectives. Third, a fully automated grain analysis system is established, based on whole-grain area quantification and twin-grain merging strategies. The proposed methodology effectively resolves longstanding limitations in metallographic analysis related to data scarcity and subjectivity in manual evaluation.</div></div>","PeriodicalId":18501,"journal":{"name":"Micron","volume":"201 ","pages":"Article 103961"},"PeriodicalIF":2.2,"publicationDate":"2026-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145604934","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","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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