Advanced Composites and Hybrid Materials
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2025
·Vol. 8
·期 1
·1-13
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IF 21.8
Tang Yubo,Huang Sheng,Chen Wei-chih,A Garu,Linghu Xitao,Wa Qingde,Huang Shuai,Chen Jian
Zn-Mn alloys are particularly promising biodegradable implant materials, but they are plagued by poor mechanical performance. In this work, a Zn-Mn alloy with ultrahigh strength and excellent ductility was achieved through addition of trace Mg (0.1 wt%) and equal channel angular pressing (ECAP). Specifically, the ECAP processed Zn-0.5Mn-0.1 Mg alloy exhibits an ultimate tensile strength (UTS) of 428 MPa, which is highest ever achieved in Zn-Mn-based alloys, along with a good elongation (EL) of 39%. In addition, the alloy exhibits excellent antibacterial performance against Staphylococcus aureus ( S. aureus ) and Escherichia coli ( E. coli ). Trace Mg addition results in the formation of Mg 2 Zn 11 and MgZn 2 nano-precipitates in the alloy, which effectively pins grain growth during dynamic recrystallization (DRX) and postpones the inverse Hall–Petch relation. Consequently, the alloy possesses quite fine grains of an average grain size (AGS) of 0.71 μm, much smaller than that of its counterpart without Mg (AGS = 2.54 μm). The ultrahigh strength of the alloy is mainly ascribed to grain boundary strengthening and precipitation strengthening. The remarkable ductility of the alloy is related to deformation twinning suppression, pyramidal < c + a > slip activation, and low dislocation density.
CAS / MDL:
研究领域:
材料科学
·
生物医学工程
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产品关联
DOI
高影响因子
Journal of Nanomaterials
·
2018
·Vol. 2018
·期 1
·1634814
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IF 2.207
Lianbing Zhong,Guihong Geng,Yujin Wang,Feng Ye,Limeng Liu
A fully dense TaC ceramic was prepared by hot pressing using 10 mol% ZrC plus 5 mol% Cu as a sintering aid. Formation of (Ta, Zr)C solid solution (ss) by reaction between TaC and ZrC facilitated densification. Addition of Cu refined the microstructure and consequently improved flexural strength of the TaC ceramics. TEM investigation found ubiquitous precipitation of nanocrystallites at multigrain conjunctions. The nanocrystallites were (Ta, Zr)C solid solution with uniform dispersion in an oxygen-rich glassy matrix. Although formation of nanoprecipitates may not much affect the mechanical properties of the TaC ceramic, the structure suggested a new type of nanoceramic worth further research.
研究领域:
材料科学
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陶瓷学
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固态化学
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显微结构分析
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复合材料
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DOI
高影响因子
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
·
2016
·Vol. 26
·期 1
·51-60
·
IF 1.094
Hu Jiaoyu,Liu Jun,Wang Chunxia,Tang Xin
The core/shell nano-TiN-coated Al powders (TiN/Al) were prepared and added into A356 alloy by ultrasonic-assisted casting method in this work. The results show that TiN/Al has a better dispersion in A356 matrix and a stronger strengthening effect than TiN without the core/shell structure. With the addition of TiN/Al, most of the coarse primary α-Al dendrites of A356 turn into equiaxial. After T6 heat treatment, it is found that eutectic silicon in A356 with TiN/Al becomes columnar or globular in shape and smaller in size, which causes a greatly enhanced elongation of 11.7%. The results also suggest that the addition of nanoparticles can affect the precipitation behaviors and change the shapes and sizes of the precipitation.
研究领域:
材料科学
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金属材料
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凝固技术
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复合材料
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材料加工工程
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Pengli Si,Xinxin Wang,Yajing Wang,Guangmeng You,Xueke Gu,Zheng Jiang,Jingdan Lei,Chao Wang
N-type PbSe-based materials have emerged as a research focus in medium-to-high temperature thermoelectric applications due to their high carrier mobility, stability across wide temperature ranges, and cost-effectiveness. However, simultaneously maintaining high carrier mobility while reducing lattice thermal conductivity remains a critical challenge for PbSe-based materials. Research demonstrates that constructing coherent interfaces optimizes charge carrier scattering, thereby maintaining high carrier mobility while achieving thermal conductivity reduction. In this work, after Cu 2 S alloying treatment, coherent nanostructured precipitates consisting of Cu 2 S (monoclinic phase) and PbS (cubic phase) are formed at grain boundaries. The lattice mismatch at the interface is maintained below 4.5%, which consequently leads to only a marginal reduction in charge carrier mobility. Meanwhile, Cu 2 S, as a dynamic electron donor, increases the carrier concentration. Additionally, the diffusion of Cu + ions introduces lattice disorder, which, in combination with the low- to mid-frequency phonon scattering from the nano-precipitates, significantly reduces the lattice thermal conductivity. As a result, a ZT value of 1.53 is achieved at 773 K. The Pb 1.02 Se-0.5% Cu 2 S composite prepared in this study exhibits superior thermoelectric performance compared to most n-type PbSe-based materials, demonstrating that the introduction of coherent nanostructures constitutes an effective strategy for enhancing the thermoelectric properties of n-type PbSe.
研究领域:
材料科学
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热电材料
·
凝聚态物理
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半导体材料
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能源材料
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Zhengshuai Cao,Mu Li,Li Shan,Mingshang Liu,Wenming Li
SnTe is an environmentally friendly and promising alternative thermoelectric material in contrast to harmful PbTe. However, the long-lasting high lattice thermal conductivity significantly inhibits the further enhancement of the thermoelectric figure of merit ZT. Herein, this study proposed a strategy of solvothermal copper doping to considerably reduce the lattice thermal conductivity by introducing multiscale hierarchical structures. The structural and morphological characterizations indicate that Cu was doped as interstitial atoms and secondary-phase Cu1.80Te. Simultaneously, this study reveals that Cu1.80Te and the SnTe matrix stem from nanoparticles and octahedral structures, respectively. In the sintered bulks, phonon scattering was significantly increased owing to the abundant micro/nanopores, Cu1.80Te nanoprecipitates, grain boundaries of SnTe, and phase boundaries between Cu1.80Te and SnTe. The increased phonon scattering leads to a lattice thermal conductivity of ∼0.36 W m–1 K–1 at 773 K, which is lower than that of pristine SnTe. Benefiting from this substantially decreased thermal conductivity, a ZT value of ∼0.91 was achieved in Sn0.98Cu0.02Te. The enhancement is ∼300% over pristine SnTe. This work provides an effective method to fabricate high-performance energy-effective SnTe-based thermoelectric materials.
研究领域:
材料科学
·
热电材料
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固体物理
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能源材料
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产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 30
·12433-12449
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IF 4.5
Wei Sikang,Han Zhaohui,Xu Yang,Xu Lei
Aluminum anodes with fine grain have stronger electrochemical activity and higher corrosion resistance, but the microwave-smelted aluminum alloy anode can be prepared with fine grain. In this work, microwave smelting has been used to refine grain size and optimize the precipitated phase in an aluminum alloy anode. The results show that microwave can not only refine the grain and improve the corrosion resistance of aluminum anode, but also the distribution of precipitated phase is more uniform. The fine grain reduces the potential difference inside the aluminum anode, thus activating the electrochemical activity of the anode and improving the corrosion resistance. The corrosion form is also changed from the conventional pit corrosion to uniform corrosion, so as to improve the utilization rate of anode. The capacity density and energy density of 1000 W microwave-smelted aluminum anode were 1554.404 mAh/g and 1955.181 Wh/kg, respectively. Compared with conventional aluminum anode, the energy density and capacity density increased by 92.7% and 64.5%, respectively. Therefore, microwave technology can improve electrochemical performance and battery performance by optimizing microstructure uniformity and refining grain size.
研究领域:
材料科学
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电化学
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能源材料
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金属腐蚀与防护
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冶金工程
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2024
·
IF 5.8
Peibo Li,Guoqiang Luo,Xiaoshan Zhang,Xiao Wang,Zhihao Wu,Yi Sun,Qiang Shen
As one of the most commonly used binary alloys , the effect of intermetallic compounds (IMCs) of Al-Cu alloys in powder metallurgy on their structure and properties is instructive for tailoring Al-Cu alloys for different applications. In this investigation, a series of Al-Cu-Ag alloys with varying Cu compositions were fabricated via hot pressing. TEM analysis identified CuAl 2 as the primary intermetallic compounds , with Ag existing in forms including Ag 2 Al, elemental Ag, and an Ag-(Cu) solid solution . The modulation of Cu content influenced the state of Ag and the mechanical behaviors of the Al-Cu-Ag alloy. Particularly, the high Al/Cu alloy, benefiting from a synergistic effect comprising stacking faults, nanoscale precipitates, and solid solutions, exhibited outstanding mechanical properties. Conversely, the Al-50Cu-3Ag alloys displayed significant brittleness , attributed to the adverse impact of large-scale intermetallic compounds and increased grain size due to the formation of CuAl 2 . The incorporation of nanoparticles effectively mitigated the grain size in high Al/Cu alloys. This study elucidates the correlation between the evolution of intermetallic compounds and composition in Al-Cu alloys, offering novel insights into the reinforcement of both Al-based and Cu-based alloys.
研究领域:
材料科学
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金属学与热处理
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粉末冶金
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结构材料
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合金设计
✓ 已验证
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-11
·
IF 15.7
Gao Jie,Li Jiahui,Miao Lei,Jia Lida,Qiu Pengfei,Yin Tingwei,Zhu Sijing,Yang Xinyu,Guo Jia-Chen,Chen Jun-Liang,Wang Xiaoyang,Nishibori Eiji,Sato Tomohiro,Shi Xun
β -Ag 2 Se holds a great promise for wearable thermoelectric generators due to its good mechanical properties and biocompatibility. However, optimizing its power factor through alterations in the Ag/Se stoichiometric ratio or incorporating secondary phases has reached the limitation. This work adopts a liquid-like sintering strategy, namely employing the migration and precipitation of silver ions from metallic silver to the silver selenide during the spark plasma sintering process to construct significantly sized and coherent Ag-rich nanoprecipitates within flexible Ag/ β -Ag 2 Se composite films, thereby achieving an unprecedented power factor exceeding 4000 μWm −1 K −2 at 303 K. The Ag-rich nanoprecipitates play a crucial role in elevating the carrier concentration, enhancing the density-of-states effective mass, and mitigating carrier scattering caused by phase interfaces and acoustic phonons. The generator containing 5 pieces of optimal films shows an normalized output power density of 10.89 μWcm −1 K −2 under a temperature difference of 26.0 K. This study strongly suggests that the creation of Ag-rich nanoprecipitates is an effective avenue for improving the electrical performance of β -Ag 2 Se-based thermoelectric materials.
研究领域:
材料科学
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纳米技术
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热电材料
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柔性电子学
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能量转换
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产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Shaoqing Lu,Zhengyi Zhu,Weite Meng,Jian Wang,Lulu Huang,Mengyao Li,Aziz Genç,Siqi Huo,Khak Ho Lim,Andreu Cabot,Yucheng Wu,Yu Zhang,Min Hong,Jian Yan,Yu Liu
Thermoelectric (TE) materials, capable of directly converting heat into electricity, offer a promising route for sustainable energy recovery. However, practical deployment is limited by the difficulty in simultaneously optimizing electrical and thermal transport properties. In this study, a synergistic microstructure-composition co-design strategy for enhancing the performance of PbTe-based TEs via Na 2 S-assisted solid-state synthesis is presented. The thermal decomposition of Na 2 S not only introduces hierarchical porosity but also facilitates initial Na doping, enabling the concurrent optimization of phonon scattering, carrier concentration, and band convergence. The optimized composition, Pb 0.97 Na 0.03 Te-1.0%Na 2 S, exhibits refined grains, dispersed Na 2 Te nanoprecipitates, and a high density of dislocations, leading to ultralow lattice thermal conductivity (≈0.50 W m −1 K −1 at 750 K) while preserving excellent electrical transport. A peak TE figure of merit zT ≈2.2 at 823 K and a high average zT ≈1.9 across 623–823 K are achieved. To validate the device-level applicability, single-leg TE modules are fabricated, achieving a high conversion efficiency of 13.4% at Δ T = 395 K, which is among the best reported for a PbTe-based system. Furthermore, a unicouple module integrated with n-type skutterudite reaches a record power density of 2.2 W cm −2 at Δ T = 375 K. This study highlights a scalable pathway for advancing mid-temperature TE materials and devices through structural and compositional engineering.
研究领域:
材料科学
·
热电学
·
固态化学
·
能量转换
·
纳米材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·Vol. 34
·期 24
·2313719
·
IF 18.5
Yingchao Wei,Zheng Ma,Wang Li,Chengjun Li,Boyu Yang,Chengwei Sun,Shuangfu Gang,Wenguang Zhang,Hui Long,Xin Li,Qinghui Jiang,Dan Zhang,Yubo Luo,Junyou Yang
Exploring N-type High-entropy materials with both high thermoelectric and mechanical properties is highly desirable for all-high-entropy thermoelectric generators (TEGs) since the thermoelectric and mechanical properties of N-type one are largely behind its P-type counterparts. Herein, a new rock-salt structure N-type high entropy thermoelectric AgBiPbSe 2 S is introduced with a bandgap of ≈0.43 eV. The atomic radii difference of each component results in a large lattice distortion of 0.246, leading to a low thermal conductivity of 0.36 W m −1 K −1 at 823 K. The figure of merit ( ZT ) reaches 0.6 for AgBiPbSe 2 S at 823 K. Moreover, Ag 2 Se precipitates are included in AgBiPbSe 2 S to filter low energy carriers for high Seebeck coefficients and to scatter phonons with nanoscale wavelength for ultralow lattice thermal conductivities. Consequently, a peak ZT of ≈1.18 at 823 K and an average ZT of 0.60 at 400–823 K are obtained for Ag 1.02 BiPbSe 2 S. More importantly, high mechanical properties are also obtained in Ag 1.02 BiPbSe 2 S, of which the Vickers hardness and flexural strength are ≈209 Hv and 32 MPa, respectively, originating from the enhanced lattice friction by chemical short-range disorder (i.e., high entropy effect) and dispersion strengthening caused by Ag 2 Se nanoprecipitates.
研究领域:
热电材料
·
材料科学
·
高熵材料
·
半导体物理
·
材料力学性能
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）