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In situ SEM analysis of cracking and its quantitative link to resistance evolution in uniaxially stretched nanocomposite inks

IF 3 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materialia

Pub Date : 2024-12-01 DOI: 10.1016/j.mtla.2024.102296

Qiushi Li, Olivier Pierron, Antonia Antoniou

Nanocomposite conductive inks consisting of metal flakes embedded in a polymer binder are employed as interconnect materials in flexible hybrid electronics (FHE) devices. Crack formation has been hypothesized to play a key role in the ink's electrical degradation (increase of resistance), but the two have not been directly correlated. To address this gap, two classes of inks are studied using uniaxial stretch experiments, with in situ SEM imaging, and synchronous electrical resistance measurement. In plane strain maps obtained from digital image correlation (DIC) analysis of wide-field SEM images (∼300 μm in width) identify crack patterns at various applied strains. From these strain maps, crack length measurements are obtained. A finite-element based numerical model adapted for non-uniform crack lengths is used to predict normalized resistance increase from the crack lengths. The model predictions are compared against the experimentally measured resistance changes. There is a remarkable correlation between the predicted and experimentally measured normalized resistance values. The linear crack density was also used to help understand the relation between the effective crack length and resistance increase. Closeup images of the ink top surface and the ink cross-section during the in situ SEM stretch experiment are used to explain differences between predicted and measured normalized resistance.

{"title":"In situ SEM analysis of cracking and its quantitative link to resistance evolution in uniaxially stretched nanocomposite inks","authors":"Qiushi Li, Olivier Pierron, Antonia Antoniou","doi":"10.1016/j.mtla.2024.102296","DOIUrl":"10.1016/j.mtla.2024.102296","url":null,"abstract":"<div><div>Nanocomposite conductive inks consisting of metal flakes embedded in a polymer binder are employed as interconnect materials in flexible hybrid electronics (FHE) devices. Crack formation has been hypothesized to play a key role in the ink's electrical degradation (increase of resistance), but the two have not been directly correlated. To address this gap, two classes of inks are studied using uniaxial stretch experiments, with in situ SEM imaging, and synchronous electrical resistance measurement. In plane strain maps obtained from digital image correlation (DIC) analysis of wide-field SEM images (∼300 μm in width) identify crack patterns at various applied strains. From these strain maps, crack length measurements are obtained. A finite-element based numerical model adapted for non-uniform crack lengths is used to predict normalized resistance increase from the crack lengths. The model predictions are compared against the experimentally measured resistance changes. There is a remarkable correlation between the predicted and experimentally measured normalized resistance values. The linear crack density was also used to help understand the relation between the effective crack length and resistance increase. Closeup images of the ink top surface and the ink cross-section during the in situ SEM stretch experiment are used to explain differences between predicted and measured normalized resistance.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"38 ","pages":"Article 102296"},"PeriodicalIF":3.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An X-ray diffraction study of the influence of linear and changing strain paths on strain and texture evolution in AA6111-T4 aluminium alloy sheets

IF 3 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materialia

Pub Date : 2024-12-01 DOI: 10.1016/j.mtla.2024.102305

Sisir Dhara , Darren J. Hughes , Steven Huband , Scott Taylor , Sumit Hazra

Multi-stage automotive stamping processes involve both linear and changing strain paths. While extensive research exists on linear strain paths and discontinuous strain path change, the study of continuous strain path change is limited due to the need for sophisticated experimental procedures. In this paper, the effect of continuous strain path change on strain, strain hardening behaviour, microstructure, and texture evolution was compared with that of discontinuous strain path change in AA6111-T4 aluminium alloy using a novel experimental setup comprising an in-situ mechanical rig and cruciform sample. An X-ray source was used to obtain diffraction patterns, which were analysed to measure diffraction intensities and lattice strains at the {111}, {200}, {220} and {311} lattice planes to study strain hardening behaviour, microstructure, and texture evolution during the loading paths. The experiments were repeated outside the X-ray diffraction chamber to study macroscopic strain evolution and hardening behaviour of the samples using a digital image correlation system. It was found that the absence of unloading and reloading in the continuous strain path change posed challenges for plastic deformation in the next deformation stage, leading to strain softening, premature failure, and relatively weaker textural development. Conversely, the presence of unloading and reloading in the discontinuous strain path change facilitated increased plastic deformation in the next deformation stage, resulting in strain hardening, delayed failure, and stronger textural development.

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引用次数: 0

Mechano-chemical competition in driven complex concentrated alloys 驱动型复杂浓缩合金的机械化学竞争

IF 3 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materialia

Pub Date : 2024-12-01 DOI: 10.1016/j.mtla.2024.102300

Luyan Li , Yuan Yao , Mostafa Hassani

Mechanically driven complex concentrated alloys can be formed by three or more types of elemental powders mixing into a solid solution through severe plastic deformation at temperatures much lower than the melting point of each element. While competition between the thermal and mechanical driving forces during forced mixing of binary systems with positive enthalpy of mixing is relatively well understood, the physics of mechanically driven mixing of multiple elements with negative mixing enthalpies remained unclear. In this work, we combined mechanical alloying (MA), X-ray diffraction (XRD), and kinetic Monte Carlo (kMC) simulations to systematically study the interplay between the chemical pairing potential and the mechanical strength of elemental pairs during the formation process of mechanically driven complex concentrated alloys. We demonstrate that the chemical and mechanical forces play a competing role in the mixing of ternary complex concentrated alloys with negative mixing enthalpies. The chemical driving force favors a chemically ordered atomic structure, while the mechanical force encourages a random atomic arrangement. We reveal the energetic basis of this competition as the gain and loss in mixing enthalpy and configurational entropy. Following this fundamental understanding, three types of mixing mechanisms and their corresponding steady-state phases are defined. We show that the molar content of the element with the lowest average mixing enthalpy governs the mixing mechanisms and thus determines the energetic stabilization of the steady-state phases. A theoretical phase prediction map is provided for alloy design. We synthesized a nanocrystalline equiatomic NiCoCr coating under the guidelines of the map, which presents exceptional mechanical properties achieved by the mechano-chemical mixing.

机械驱动的复杂浓缩合金可以由三种或更多种元素粉末在远低于每种元素熔点的温度下通过剧烈的塑性变形混合成固溶体而形成。虽然热驱动力和机械驱动力之间的竞争在二元系统的强制混合具有正的混合焓相对较好理解，物理驱动的多元素混合具有负的混合焓仍然不清楚。本文采用机械合金化（MA）、x射线衍射（XRD）和动力学蒙特卡罗（kMC）模拟相结合的方法，系统研究了机械驱动复合浓缩合金形成过程中化学配对势与元素对机械强度之间的相互作用。我们证明了化学力和机械力在混合焓为负的三元络合浓合金的混合中起着竞争作用。化学驱动力倾向于化学上有序的原子结构，而机械力则倾向于随机的原子排列。我们揭示了这种竞争的能量基础，即混合焓和构型熵的得失。根据这一基本认识，定义了三种类型的混合机制及其相应的稳态相。我们发现平均混合焓最低的元素的摩尔含量决定了混合机制，从而决定了稳态相的能量稳定。为合金设计提供了理论相预测图。我们在图的指导下合成了纳米晶等原子NiCoCr涂层，该涂层通过机械化学混合获得了优异的力学性能。

{"title":"Mechano-chemical competition in driven complex concentrated alloys","authors":"Luyan Li , Yuan Yao , Mostafa Hassani","doi":"10.1016/j.mtla.2024.102300","DOIUrl":"10.1016/j.mtla.2024.102300","url":null,"abstract":"<div><div>Mechanically driven complex concentrated alloys can be formed by three or more types of elemental powders mixing into a solid solution through severe plastic deformation at temperatures much lower than the melting point of each element. While competition between the thermal and mechanical driving forces during forced mixing of binary systems with positive enthalpy of mixing is relatively well understood, the physics of mechanically driven mixing of multiple elements with negative mixing enthalpies remained unclear. In this work, we combined mechanical alloying (MA), X-ray diffraction (XRD), and kinetic Monte Carlo (kMC) simulations to systematically study the interplay between the chemical pairing potential and the mechanical strength of elemental pairs during the formation process of mechanically driven complex concentrated alloys. We demonstrate that the chemical and mechanical forces play a competing role in the mixing of ternary complex concentrated alloys with negative mixing enthalpies. The chemical driving force favors a chemically ordered atomic structure, while the mechanical force encourages a random atomic arrangement. We reveal the energetic basis of this competition as the gain and loss in mixing enthalpy and configurational entropy. Following this fundamental understanding, three types of mixing mechanisms and their corresponding steady-state phases are defined. We show that the molar content of the element with the lowest average mixing enthalpy governs the mixing mechanisms and thus determines the energetic stabilization of the steady-state phases. A theoretical phase prediction map is provided for alloy design. We synthesized a nanocrystalline equiatomic NiCoCr coating under the guidelines of the map, which presents exceptional mechanical properties achieved by the mechano-chemical mixing.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"38 ","pages":"Article 102300"},"PeriodicalIF":3.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142748546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Resolving β relaxation and enhancing thermal stability of the medium-entropy metallic glass Zr35Ti30Be27.5Fe7.5 through modulating initial cooling temperature

IF 3 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materialia

Pub Date : 2024-12-01 DOI: 10.1016/j.mtla.2024.102306

Xiong Shang , Jichao Qiao , Wenkang Tu , Xiaodong Wang , Yanhui Zhang , Shidong Feng , Zijing Li , Li-Min Wang

Most conventional metallic glasses often exhibit an excess wing rather than clear resolving the β relaxation, making it challenging to fully understand this kinetic phenomenon. In this study, we investigated β relaxation in Zr₃₅Ti₃₀Be_27.5Fe_7.5 metallic glasses by varying the initial cooling temperature while maintaining constant cooling rates. The study results demonstrate that increasing the initial cooling temperature effectively resolve the β relaxation, which in turn significantly influences the glass transition and crystallization temperatures, enhancing the thermal stability of the metallic glass. Stress relaxation studies indicate that glasses quenched from higher melt temperatures exhibit a lower non-exponential parameter β_KWW, indicative of greater dynamic heterogeneity, along with a broader distribution of relaxation times in the as-quenched samples. This study suggests that higher initial cooling temperatures not only facilitate a clearer examination of β relaxation but also promote structural heterogeneity in metallic glasses, which is linked to the observed β relaxation and the improvement in thermal stability.

{"title":"Resolving β relaxation and enhancing thermal stability of the medium-entropy metallic glass Zr35Ti30Be27.5Fe7.5 through modulating initial cooling temperature","authors":"Xiong Shang , Jichao Qiao , Wenkang Tu , Xiaodong Wang , Yanhui Zhang , Shidong Feng , Zijing Li , Li-Min Wang","doi":"10.1016/j.mtla.2024.102306","DOIUrl":"10.1016/j.mtla.2024.102306","url":null,"abstract":"<div><div>Most conventional metallic glasses often exhibit an excess wing rather than clear resolving the <em>β</em> relaxation, making it challenging to fully understand this kinetic phenomenon. In this study, we investigated <em>β</em> relaxation in Zr<sub>35</sub>Ti<sub>30</sub>Be<sub>27.5</sub>Fe<sub>7.5</sub> metallic glasses by varying the initial cooling temperature while maintaining constant cooling rates. The study results demonstrate that increasing the initial cooling temperature effectively resolve the <em>β</em> relaxation, which in turn significantly influences the glass transition and crystallization temperatures, enhancing the thermal stability of the metallic glass. Stress relaxation studies indicate that glasses quenched from higher melt temperatures exhibit a lower non-exponential parameter <em>β</em><sub>KWW</sub>, indicative of greater dynamic heterogeneity, along with a broader distribution of relaxation times in the as-quenched samples. This study suggests that higher initial cooling temperatures not only facilitate a clearer examination of <em>β</em> relaxation but also promote structural heterogeneity in metallic glasses, which is linked to the observed <em>β</em> relaxation and the improvement in thermal stability.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"38 ","pages":"Article 102306"},"PeriodicalIF":3.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Strain-gradient crystal plasticity model with slip-system level GND tracking: Simulation vs experiment for sequential strain path change in AA6016-T4

IF 3 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materialia

Pub Date : 2024-12-01 DOI: 10.1016/j.mtla.2024.102304

Rishabh Sharma , Russell Marki , Asher Webb , Marko Knezevic , Michael P. Miles , David T. Fullwood

Crystal plasticity models that track strain gradients and associated geometrically necessary dislocations (GNDs) typically determine the Nye tensor, mimicking the experimental approach. However, estimating GND densities for each slip-system is then intrinsically ambiguous. This study seeks to build upon current state of the art by quantifying GNDs at the slip-system level in the model using the local strain gradients. The model is exercised by replicating experiments undertaken on AA6016, which are performed under multi-step strain paths; both GND and SSD populations are quantified at various stages using both high resolution EBSD (HREBSD) and XRD. A full 3D volume of the material is extracted using ion beam serial sectioning to enable the creation of a high-fidelity model of the material.

The combined modeling and experimental campaigns conclude that: 1) Calculation of the GND content at the slip level gives effectively equivalent GND evolution as the tradition Nye tensor method, but provides the significant advantage of knowing unambiguously the contribution on each slip system. 2) The net hardening predicted by the SGCP model is accurate, including prediction of a rapid increase in hardening (and associated dislocation content) following strain path change; and 3) Comparisons of observed and simulated GND populations reveal that buildup in the real sample is dominated by precipitate distribution rather than by grain boundary (GB) networks; such precipitates are not present in the current model, hence this result was not predicted.

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引用次数: 0

BCZT/LSMO/BCZT sandwich film: Toward high-temperature energy storage capacitors

IF 3 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materialia

Pub Date : 2024-12-01 DOI: 10.1016/j.mtla.2024.102309

Afaak Lakouader , Abdelilah Lahmar , Špela Kunej , Daoud Mezzane , Jamal Belhadi , El Hassan Choukri , Lahoucine Hajji , M'barek Amjoud , Zdravko Kutnjak , Igor A. Luk'yanchuk , Mimoun EL Marssi

Ba_0.85Ca_0.15Zr_0.1Ti_0.9O₃/La_0.8Sr_0.2MnO₃/Ba_0.85Ca_0.15Zr_0.1Ti_0.9O₃ (BCZT/LSMO/BCZT) sandwich thin film was deposited on Pt/TiO₂/SiO₂/Si substrate using sol-gel process. The dielectric properties displayed excellent thermal stability, with the temperature coefficient of capacitance TCC remaining within ± 10 % between -50 °C and 300 °C. The high-energy storage density W_rec of 11.8 J/cm³ observed in the sandwich thin film was nearly twice as high as that of the single BCZT thin film, with high efficiency η of 79 % and responsivity ξ_RT = W_rec /E_app of 0.016 J/kV.cm² under a weak electric field of 800 kV/cm. Furthermore, the stabilities of W_rec and η were observed over a wide temperature range. Interestingly, a high value of W_f = W_rec/(1-η) (> 60 J/cm³) from room temperature up to 300 °C was observed for BCZT/LSMO/BCZT thin film (three times higher than that of the single BCZT thin film), making the sandwich thin film promising candidate for high-temperature energy storage capacitors.

{"title":"BCZT/LSMO/BCZT sandwich film: Toward high-temperature energy storage capacitors","authors":"Afaak Lakouader , Abdelilah Lahmar , Špela Kunej , Daoud Mezzane , Jamal Belhadi , El Hassan Choukri , Lahoucine Hajji , M'barek Amjoud , Zdravko Kutnjak , Igor A. Luk'yanchuk , Mimoun EL Marssi","doi":"10.1016/j.mtla.2024.102309","DOIUrl":"10.1016/j.mtla.2024.102309","url":null,"abstract":"<div><div>Ba<sub>0.85</sub>Ca<sub>0.15</sub>Zr<sub>0.1</sub>Ti<sub>0.9</sub>O<sub>3</sub>/La<sub>0.8</sub>Sr<sub>0.2</sub>MnO<sub>3</sub>/Ba<sub>0.85</sub>Ca<sub>0.15</sub>Zr<sub>0.1</sub>Ti<sub>0.9</sub>O<sub>3</sub> (BCZT/LSMO/BCZT) sandwich thin film was deposited on Pt/TiO<sub>2</sub>/SiO<sub>2</sub>/Si substrate using sol-gel process. The dielectric properties displayed excellent thermal stability, with the temperature coefficient of capacitance <em>TCC</em> remaining within ± 10 % between -50 °C and 300 °C. The high-energy storage density <em>W<sub>rec</sub></em> of 11.8 J/cm<sup>3</sup> observed in the sandwich thin film was nearly twice as high as that of the single BCZT thin film, with high efficiency <em>η</em> of 79 % and responsivity <em>ξ<sub>RT</sub> = W<sub>rec</sub> /E<sub>app</sub></em> of 0.016 J/kV.cm<sup>2</sup> under a weak electric field of 800 kV/cm. Furthermore, the stabilities of <em>W<sub>rec</sub></em> and <em>η</em> were observed over a wide temperature range. Interestingly, a high value of <em>W<sub>f</sub> = W<sub>rec</sub>/(1-η)</em> (> 60 J/cm<sup>3</sup>) from room temperature up to 300 °C was observed for BCZT/LSMO/BCZT thin film (three times higher than that of the single BCZT thin film), making the sandwich thin film promising candidate for high-temperature energy storage capacitors.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"38 ","pages":"Article 102309"},"PeriodicalIF":3.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143169149","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Corinne E. Packard, 2025 Acta Materialia Silver Medal Award Recipient

IF 3 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materialia

Pub Date : 2024-12-01 DOI: 10.1016/j.mtla.2024.102201

引用次数: 0

Dr. Richard J. Spontak, 2025 recipient of the Acta Materialia Inc. Hollomon Award for Materials and Society

IF 3 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materialia

Pub Date : 2024-12-01 DOI: 10.1016/j.mtla.2024.102202

引用次数: 0

Recipients of the 2023 Acta Materialia, inc. student awards

IF 3 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materialia

Pub Date : 2024-12-01 DOI: 10.1016/j.mtla.2024.102257

引用次数: 0

Enhancing the accuracy and generality of the Debye–Grüneisen Model: Optimizing the volume dependence for accurate predictions across varied compositions

IF 3 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materialia

Pub Date : 2024-12-01 DOI: 10.1016/j.mtla.2024.102299

Yi Wang , Xingru Tan , Saro San , Shanshan Hu , Michael C. Gao

In this work, we have introduced an optimized Debye-Grüneisen model that revolutionizes the determination of the Debye temperature and Grüneisen parameters. Unlike conventional methods, our model requires only the 0 K energy volume data for a material as input, eliminating the need to determine the bulk modulus and its pressure derivative, which often pose challenges due to numerical uncertainties. This unique feature sets our model apart from existing approaches and streamlines the process, enabling accurate predictions of thermal expansion behavior across various materials. To demonstrate its effectiveness, we showcase its excellent agreement with measured coefficients of thermal expansion (CTE) for the nickel-cobalt-chromium-aluminum-yttrium (Ni-Co-Cr-Al-Y) bond-coating system. Additionally, we apply our approach by conducting a high-throughput search for potential bond-coating materials among 90,000 compositions within the aluminum-cobalt-chromium-iron-nickel (Al-Co-Cr-Fe-Ni) system. From this extensive search, four compositions are synthesized, and the measured CTE values agree very well with theoretical predictions, hence validating our approach. The current optimized Debye-Grüneisen model combined with Density Functional Theory (DFT)-based thermodynamic database enables reliable and efficient high-throughput calculations of CTE of of a material without expensive phonon calculations.

{"title":"Enhancing the accuracy and generality of the Debye–Grüneisen Model: Optimizing the volume dependence for accurate predictions across varied compositions","authors":"Yi Wang , Xingru Tan , Saro San , Shanshan Hu , Michael C. Gao","doi":"10.1016/j.mtla.2024.102299","DOIUrl":"10.1016/j.mtla.2024.102299","url":null,"abstract":"<div><div>In this work, we have introduced an optimized Debye-Grüneisen model that revolutionizes the determination of the Debye temperature and Grüneisen parameters. Unlike conventional methods, our model requires only the 0 K energy volume data for a material as input, eliminating the need to determine the bulk modulus and its pressure derivative, which often pose challenges due to numerical uncertainties. This unique feature sets our model apart from existing approaches and streamlines the process, enabling accurate predictions of thermal expansion behavior across various materials. To demonstrate its effectiveness, we showcase its excellent agreement with measured coefficients of thermal expansion (CTE) for the nickel-cobalt-chromium-aluminum-yttrium (Ni-Co-Cr-Al-Y) bond-coating system. Additionally, we apply our approach by conducting a high-throughput search for potential bond-coating materials among 90,000 compositions within the aluminum-cobalt-chromium-iron-nickel (Al-Co-Cr-Fe-Ni) system. From this extensive search, four compositions are synthesized, and the measured CTE values agree very well with theoretical predictions, hence validating our approach. The current optimized Debye-Grüneisen model combined with Density Functional Theory (DFT)-based thermodynamic database enables reliable and efficient high-throughput calculations of CTE of of a material without expensive phonon calculations.</div></div>","PeriodicalId":47623,"journal":{"name":"Materialia","volume":"38 ","pages":"Article 102299"},"PeriodicalIF":3.0,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143168111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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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