Journal of Materials Science & Technology最新文献_第9页

Effect of short-range ordering on crack propagation behavior of high-entropy alloys 短程有序对高熵合金裂纹扩展行为的影响

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-01-22 DOI: 10.1016/j.jmst.2024.11.072

H.Y. Bo, H.Y. Song, X.Y. Li

{"title":"Effect of short-range ordering on crack propagation behavior of high-entropy alloys","authors":"H.Y. Bo, H.Y. Song, X.Y. Li","doi":"10.1016/j.jmst.2024.11.072","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.11.072","url":null,"abstract":"The short-range ordering (SRO) structure has been considered as a toughening method to improve the mechanical properties of high-entropy alloys (HEAs). However, the strengthening mechanism of the SRO structures on the HEAs still needs to be further revealed. Here, the effect of element distribution, Al content, crack orientation, temperature, and strain rate on the crack propagation behavior of the AlxFeCoCrNi HEAs are investigated using Monte Carlo (MC)/molecular dynamics (MD) simulation methods. Two HEA models are considered, one with five elements randomly distributed in the alloys, i.e. RSS_HEAs, and the other presenting SRO structure in the alloys, namely SRO_HEAs. The results show that Al atoms play a decisive role in the SRO degree of the HEA. The higher the Al content, the greater the SRO degree of the HEA, and the stronger the resistance of the SRO structure to crack propagation in the alloys. The results indicate that the reinforcement effect of the SRO structure in the model with the (<math><mrow is=\"true\"><mn is=\"true\">1</mn><mover accent=\"true\" is=\"true\"><mn is=\"true\">1</mn><mo is=\"true\">¯</mo></mover><mover accent=\"true\" is=\"true\"><mn is=\"true\">1</mn><mo is=\"true\">¯</mo></mover></mrow></math>)[110] crack is more significant than that with the (<math><mrow is=\"true\"><mover accent=\"true\" is=\"true\"><mn is=\"true\">1</mn><mo is=\"true\">¯</mo></mover><mn is=\"true\">10</mn></mrow></math>)[110] crack. The results show that the crack length of the alloys at maximum strain does not monotonically increase with temperature, but rather exhibits a turning point at the temperature of 400 K. When the temperature is below 400 K, the crack length of the alloys increases with the increase of temperature, while above 400 K, the opposite trend appears. In addition, the results indicate that the crack length of the alloys decreases with increasing strain rate under the same strain.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"38 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142992181","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Optimizing structural ordering degree to improve the mechanical reliability of metallic glasses 优化结构有序度，提高金属玻璃的机械可靠性

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-01-21 DOI: 10.1016/j.jmst.2024.12.024

Shuang Su, Wenjie Zhao, Xin Su, Yagnesh Shadangi, Zhishuai Jin, Zhiliang Ning, Yanming Zhang, Jianfei Sun, Yongjiang Huang

引用次数: 0

Intermittent healing for alleviating the functional fatigue and restoration of the elastocaloric effect in superelastic NiTi shape memory alloy 超弹性NiTi形状记忆合金的间歇性愈合缓解功能性疲劳和恢复弹热效应

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-01-21 DOI: 10.1016/j.jmst.2024.11.071

Junyu Chen, Fei Liu, Gang Fang, Upadrasta Ramamurty

{"title":"Intermittent healing for alleviating the functional fatigue and restoration of the elastocaloric effect in superelastic NiTi shape memory alloy","authors":"Junyu Chen, Fei Liu, Gang Fang, Upadrasta Ramamurty","doi":"10.1016/j.jmst.2024.11.071","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.11.071","url":null,"abstract":"Functional fatigue in the superelastic NiTi shape memory alloys occurs due to the accumulation of dislocations and retention of martensite with the cyclic loading. These mechanisms reduce the amount of the material available for the stress-induced transformation and, thus, lower the elastocaloric effect that originates from the stress-induced latent heat variations. In this study, the individual contributions of the micromechanisms responsible for the functional fatigue in superelastic NiTi at different maximum tensile stress (σmax) are critically examined. Results show that the elastocaloric effect degrades significantly with cycling, and the saturated degraded value increases with σmax; the steady-state adiabatic temperature change is unexpectedly non-proportional to σmax. An overheating treatment (‘healing’) after mechanical fatigue reverts the retained martensite into austenite, making it available for subsequent transformation and restoring the elastocaloric effect significantly. Such a restoration increases exponentially with σmax. Consequently, the steady-state elastocaloric effect of the healed NiTi is proportional to σmax and can reach more than twice that of NiTi without healing. The work sheds light on the physical origins of elastocaloric degradation of superelastic NiTi and also provides a feasible method for ameliorating functional fatigue.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"22 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142990635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 columnar-to-equiaxed microstructural transition on the fatigue performance of a laser powder bed fused high-strength Al alloy 柱状到等轴组织转变对激光粉末床熔合高强铝合金疲劳性能的影响

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-01-21 DOI: 10.1016/j.jmst.2024.12.026

Jin'e Sun, Punit Kumar, Pei Wang, Upadrasta Ramamurty, Xuanhui Qu, Baicheng Zhang

{"title":"Effect of columnar-to-equiaxed microstructural transition on the fatigue performance of a laser powder bed fused high-strength Al alloy","authors":"Jin'e Sun, Punit Kumar, Pei Wang, Upadrasta Ramamurty, Xuanhui Qu, Baicheng Zhang","doi":"10.1016/j.jmst.2024.12.026","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.026","url":null,"abstract":"Aluminum alloys that are additively manufactured using the laser powder bed fusion (LPBF) suffer from relatively poor high cycle fatigue (HCF) resistance. In an effort to alleviate this, a high-strength Al alloy, Al-Mn-Mg-Sc-Zr, with columnar, equiaxed, and bi-modal microstructures was produced by varying the scanning velocity and the substrate temperature during the LPBF process. The tensile strength of LPBF Al-Mn-Mg-Sc-Zr alloy is 475 ± 5 – 516 ± 6 MPa with favorable elongation of approximately 11 %, higher than that of most of the other Al alloys, including conventional high-strength rolled/ECAP Al alloys and AM Al-Mg-Sc-Zr alloys. Specimens with bimodal microstructure and specimens with fully equiaxed microstructure both show a fatigue strength of 230 MPa (at 107 loading cycles), which is the highest among those reported for the LPBF Al alloys. The deformation synergy in the bimodal microstructure also improves the fatigue resistance in the strain-controlled low cycle fatigue (LCF) regime. The equiaxed microstructure restricts the to-and-fro dislocation motion during cyclic loading, which, in turn, minimizes the strain localization. At the later stages of strain accumulation, microcracks form at the grain boundaries, limiting the further improvement of the alloy's fatigue strength. This study demonstrates microstructural tailoring through AM enables improvement of the fatigue resistance of aluminum alloys.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"105 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142992183","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Achieving superior strength and ductility synergy of WE54 alloy via combined dislocation introduction and twinning 通过位错引入和孪晶相结合，实现了WE54合金优异的强度和延展性协同作用

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-01-18 DOI: 10.1016/j.jmst.2024.12.023

Liuyong He, Jiang Zheng, Qiyang He, Tianjiao Li, Haoge Shou, Dongdi Yin, Shengwen Bai, Bin Jiang, Fusheng Pan

{"title":"Achieving superior strength and ductility synergy of WE54 alloy via combined dislocation introduction and twinning","authors":"Liuyong He, Jiang Zheng, Qiyang He, Tianjiao Li, Haoge Shou, Dongdi Yin, Shengwen Bai, Bin Jiang, Fusheng Pan","doi":"10.1016/j.jmst.2024.12.023","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.023","url":null,"abstract":"Aging precipitation can effectively enhance the strength of Mg–RE alloys, but it is usually accompanied by a significant decrease in ductility, thus the strength–ductility trade-off is a longstanding challenge. In this study, we report a new strategy that coupled pre-deformation (pre-tension along the extrusion direction (ED) followed by pre-compression along transverse direction (TD)) with artificial aging to achieve an exceptional strength–ductility synergy in the WE54 alloy at RT. We analyzed the microstructure, deformation modes and mechanical properties of four samples: T6 (artificial aging), PT-T6 (pre-tension + artificial aging), PC-T6 (pre-compression + artificial aging), and PTC-T6 (coupled pre-deformation + artificial aging). The PTC-T6 sample exhibited the superior strength–plasticity synergy, showing a strength increase of 111.9 MPa over the T6 sample and only a slight decrease in elongation to fracture. The PTC-T6 sample features finer and denser precipitates, along with a higher dislocation density, particularly a significant presence of <c+a> dislocations. This microstructural configuration enhances strength and facilitates the activation of pyramidal slip, which is the primary factor underlying its superior strength–ductility synergy.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"98 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142988549","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 novel designed trilayer composite solid electrolyte enabling high-areal-capacity all-solid-state lithium batteries with long lifespan 一种新型的三层复合固体电解质，使高面积容量的全固态锂电池具有长寿命

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-01-18 DOI: 10.1016/j.jmst.2024.11.070

Yangming Hu, Liansheng Li, Xiangxiang Fu, Wanting Li, Yuanfu Deng

{"title":"A novel designed trilayer composite solid electrolyte enabling high-areal-capacity all-solid-state lithium batteries with long lifespan","authors":"Yangming Hu, Liansheng Li, Xiangxiang Fu, Wanting Li, Yuanfu Deng","doi":"10.1016/j.jmst.2024.11.070","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.11.070","url":null,"abstract":"The interface instability between composite solid electrolytes (CSEs) and lithium anode significantly shortens the lifespan of all-solid-state lithium batteries (ASSLBs) with high areal capacity. In this work, a CSE featuring a trilayer architecture is developed by incorporating a thin polyethylene (PE) separator into a blending polymer matrix of poly(ethylene oxide) and poly(vinylidene fluoride) (PEO-PVDF) through a hot pressing technique. This structural design provides complementary functions: the flexible outer layers confine lithium deposition within a restricted area, while the robust interlayer prevents lithium dendrite penetration. Additionally, the incorporation of LiNO3 significantly enhances the stability of the CSE/Li interface by gradually forming a Li3N-rich interfacial film, which promotes uniform lithium deposition. Consequently, the assembled Li||Li symmetrical cell demonstrates stable cycling for over 6000 h at a current density of 0.2 mA cm–2 with an areal capacity of 1.2 mAh cm–2. More attractively, ASSLBs constructed with the designed CSEs, high mass loading LFP/NCM811 (LFP: LiFePO4; NCM811: LiNi0.8Co0.1Mn0.1O2) cathodes (≥ 12 mg cm–2), and lithium metal anodes deliver superior cycling performance without short-circuiting at current densities of 0.3/0.2 mA cm–2, respectively. This work offers critical insights for the design of high-performance ASSLBs with improved durability at high areal capacities.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"7 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142988550","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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 simple model revealing the evolution of mechanical properties in Al-Zn-Mg-Cu alloys with a rich Al angle based on CALPHAD 基于CALPHAD建立了富Al角Al- zn - mg - cu合金力学性能演化的简单模型

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-01-18 DOI: 10.1016/j.jmst.2024.12.022

Xiyu He, Xuehong Xu, Xiang Xiao, Guojun Wang, Yunlai Deng, Yunqiang Fan

{"title":"A simple model revealing the evolution of mechanical properties in Al-Zn-Mg-Cu alloys with a rich Al angle based on CALPHAD","authors":"Xiyu He, Xuehong Xu, Xiang Xiao, Guojun Wang, Yunlai Deng, Yunqiang Fan","doi":"10.1016/j.jmst.2024.12.022","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.022","url":null,"abstract":"A simple model, namely the equivalence precipitation model of η-type precipitate, has been established based on CALPHAD for the Al-Zn-Mg-1.5Cu alloy with a rich Al angle. The relationship of the theoretical mass fraction of η-type precipitate, the total content of Zn and Mg, and the Zn/Mg ratio is disclosed through the equivalence precipitation model. Moreover, the evolution of microstructure and mechanical properties in alloys with different theoretical mass fractions of η-type precipitate are explored. The findings imply that the fluctuation of theoretical mass fraction of η-type precipitate in the alloy primarily impacts the precipitation behavior of η-type precipitate. The increase of theoretical mass fraction of η-type precipitate leads to a higher volume fraction of η' phase, resulting in an improvement in strength. However, alloys with a higher theoretical mass fraction of η-type precipitate are inclined to form the quench-induced η phase, showing higher quench sensitivity. These results are attributed to the regulation of the precipitation behavior by the total content of Zn and Mg and the Zn/Mg ratio with different theoretical mass fractions of η-type precipitate. Experimental verification has demonstrated that the equivalence precipitation model can effectively predict precipitation strengthening and evaluate the quench sensitivity of Al-Zn-Mg-1.5Cu alloys.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"31 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142988551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Ultrahigh specific surface area mesoporous perovskite oxide nanosheets with rare-earth-enhanced lattice oxygen participation for superior water oxidation 具有稀土增强晶格氧参与的超高比表面积介孔钙钛矿氧化物纳米片具有优异的水氧化性能

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-01-17 DOI: 10.1016/j.jmst.2024.11.069

Biao Wang, Xiangrui Wu, Suyue Jia, Jiayi Tang, Hao Wu, Xuan Wang, Shengyong Gao, Hao Li, Haijiao Lu, Gengtao Fu, Xiangkang Meng, Shaochun Tang

{"title":"Ultrahigh specific surface area mesoporous perovskite oxide nanosheets with rare-earth-enhanced lattice oxygen participation for superior water oxidation","authors":"Biao Wang, Xiangrui Wu, Suyue Jia, Jiayi Tang, Hao Wu, Xuan Wang, Shengyong Gao, Hao Li, Haijiao Lu, Gengtao Fu, Xiangkang Meng, Shaochun Tang","doi":"10.1016/j.jmst.2024.11.069","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.11.069","url":null,"abstract":"Perovskite oxides (ABO3) are thought to be promising electrocatalysts for oxygen evolution reaction (OER), but their specific surface area (SSA) is too low (usually < 10 m2 g-1). Developing advanced ABO3 electrocatalysts with high SSA and optimized structure is of great significance but remains a tremendous challenge. Herein, we propose a general strategy for fabrication of mesoporous perovskite oxide nanosheets (MPONs) with controllable atomic doping via self-sacrificial template-induced nanostructure modulation. A variety of MPONs including LaFeO3, A-site-doped LaFeO3 (A-LaFeO3, where A is Pr, Nd, Sm, Eu, or Gd) and B-site-doped LaFeO3 (B-LaFeO3, where B is Mn, Co, Ni, Cu, or Zn) have been achieved. Interestingly, it is discovered that the catalytic activities of A-LaFeO3 MPONs as OER catalysts are overall higher than those of B-LaFeO3 ones. Especially, the screened Eu-LaFeO3 MPONs only require a low overpotential of 267 mV at 10 mA cm-2, outperforming most reported perovskite oxides. The superior catalytic activity of Eu-LaFeO3 MPONs is attributed to their favorable porous structure, which increases the density of active sites, and enhanced lattice oxygen participation, which improves the intrinsic activity. This study provides guidance for the design and controlled synthesis of advanced rare-earth-doped MPONs with ultrahigh SSA for enhanced electrocatalysis.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"14 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142988552","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

The precipitation evolution and coarsening resistance of dilute Al-Zr-Er-Yb (-Sc) alloys 稀Al-Zr-Er-Yb （-Sc）合金的析出演变及抗粗化性能

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-01-16 DOI: 10.1016/j.jmst.2024.11.014

Yao-Jie Kong, Hong-Ying Li, Hui-Jin Tao, Wen-Jian Liu

{"title":"The precipitation evolution and coarsening resistance of dilute Al-Zr-Er-Yb (-Sc) alloys","authors":"Yao-Jie Kong, Hong-Ying Li, Hui-Jin Tao, Wen-Jian Liu","doi":"10.1016/j.jmst.2024.11.014","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.11.014","url":null,"abstract":"The precipitation and coarsening behavior of L12 nanophases in Al-0.15Zr-0.15Er-0.15Yb-xSc (wt. %) alloys during aging were characterized by Double-Cs-corrected STEM, TEM, microhardness testing, electrical conductivity measurement, and first-principles calculations. The results indicate that the Al3(Yb, Er) initiates precipitation at approximately 175 °C with substantial precipitation occurring at 250 °C. The Al3Sc and Al3Zr precipitate at approximately 325 and 450 °C, respectively. The core/shell precipitates initially form in Al-Zr-Er-Yb-Sc alloys consisting of an Al3(Yb, Er) core, an Al3Sc inner shell, and an Al3Zr outer shell. Upon prolonged aging, the core and inner shell remain as the Al3(Yb, Er) and Al3Sc, respectively, with the outer shell transforming into Al3(Yb, Er, Zr), and the interface with α-Al remaining as the Al3Zr. The precipitation evolution of the core-shell phases aligns with thermodynamic predictions based on solute segregation energies and phase interface energies. The increase of Sc content can effectively improve the aging response rate and strength of alloys. A modest Sc addition notably improves the coarsening resistance of the precipitation, while an excessive amount does not further improve this resistance.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"96 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142987018","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Multifunctional rigid polyimide foams with outstanding EMI shielding and wave absorption via densification strategy 多功能刚性聚酰亚胺泡沫，通过致密化策略具有出色的EMI屏蔽和波吸收

IF 10.9 1区材料科学

Journal of Materials Science & Technology Pub Date : 2025-01-16 DOI: 10.1016/j.jmst.2024.12.021

Yugen Wang, Jianwei Li, Yuanyuan Zhong, Jiahao Kang, Bilin Zhang, Zhonglei Ma, Qiangli Zhao

{"title":"Multifunctional rigid polyimide foams with outstanding EMI shielding and wave absorption via densification strategy","authors":"Yugen Wang, Jianwei Li, Yuanyuan Zhong, Jiahao Kang, Bilin Zhang, Zhonglei Ma, Qiangli Zhao","doi":"10.1016/j.jmst.2024.12.021","DOIUrl":"https://doi.org/10.1016/j.jmst.2024.12.021","url":null,"abstract":"The rapid development of modern 5G technology has significantly increased the demand for multifunctional electromagnetic interference (EMI) shielding and wave-absorbing materials. Hence, a densification strategy was proposed to fabricate multifunctional rigid polyimide (PI) composite foam. As a result, the composite PI foam exhibits excellent mechanical properties, with tensile and bending strengths of 4.7 and 21.1 MPa, respectively. Moreover, the composite PI foam achieves a promising EMI shielding performance with a high absorption coefficient (A) of 0.71, coupled with an X-band (8.2–12.4 GHz) EMI rating of 44 dB (2 mm) due to its high conductivity (20.29 ms/mm). Satisfyingly, the composite PI foam also has an optimal reflection loss (RL) of up to −46.4 dB and an effective absorption bandwidth (EAB) (RL < −10 dB) that covers the entire X-band. Meanwhile, the fabricated foam demonstrates a Joule heating performance of 89.2°C under supply voltages (3–9 V) and rapid response time (within 20 s) for stable and reproducible performance in long-term cycling. This work provides a versatile strategy for the development of lightweight and high-strength materials for EMI shielding and microwave absorption, demonstrating great potential for aerospace, microelectronics, and energy conversion applications.","PeriodicalId":16154,"journal":{"name":"Journal of Materials Science & Technology","volume":"54 1","pages":""},"PeriodicalIF":10.9,"publicationDate":"2025-01-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142987237","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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