The traditional von Neumann computing architecture has relatively-low information processing speed and high power consumption, being difficult to meet the computing needs of artificial intelligence (AI). Neuromorphic computing systems, with massively parallel computing capability and low-power consumption, have been considered as an ideal option for data storage and AI computing in the future. Memristor as the fourth basic electronic component besides resistance, capacitance and inductance, could be the most competitive candidate for neuromorphic computing systems benefiting from the simple structure, continuously adjustable conductivity state, ultra-low power consumption, high switching speed and compatibility with existing CMOS technology. The memristor devices with applying MXene-based hybrids have attracted significant attention in recent years. Here, we introduce the latest progress in the synthesis of MXene-based hybrids and summarize the potential applications of MXene-based hybrids in memristor devices and neuromorphological intelligence. We explore the development trend of memristor constructed by combining MXenes with other functional materials and emphatically discuss the potential mechanism of MXenes-based memristor devices. Finally, the future prospects and directions of MXene-based memristors are briefly described.
{"title":"Preparation of MXene-based Hybrids and Their Application in Neuromorphic Devices","authors":"Zhuohao Xiao, Xiaodong Xiao, Ling Bing Kong, Hongbo Dong, Xiuying Li, Bin He, Shuangchen Ruan, Jianpang Zhai, Kun Zhou, Qin Huang, Liang Chu","doi":"10.1088/2631-7990/ad1573","DOIUrl":"https://doi.org/10.1088/2631-7990/ad1573","url":null,"abstract":"\u0000 The traditional von Neumann computing architecture has relatively-low information processing speed and high power consumption, being difficult to meet the computing needs of artificial intelligence (AI). Neuromorphic computing systems, with massively parallel computing capability and low-power consumption, have been considered as an ideal option for data storage and AI computing in the future. Memristor as the fourth basic electronic component besides resistance, capacitance and inductance, could be the most competitive candidate for neuromorphic computing systems benefiting from the simple structure, continuously adjustable conductivity state, ultra-low power consumption, high switching speed and compatibility with existing CMOS technology. The memristor devices with applying MXene-based hybrids have attracted significant attention in recent years. Here, we introduce the latest progress in the synthesis of MXene-based hybrids and summarize the potential applications of MXene-based hybrids in memristor devices and neuromorphological intelligence. We explore the development trend of memristor constructed by combining MXenes with other functional materials and emphatically discuss the potential mechanism of MXenes-based memristor devices. Finally, the future prospects and directions of MXene-based memristors are briefly described.","PeriodicalId":52353,"journal":{"name":"International Journal of Extreme Manufacturing","volume":null,"pages":null},"PeriodicalIF":14.7,"publicationDate":"2023-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139003509","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-13DOI: 10.1088/2631-7990/ad1574
Soo Young Cho, D. Ho, S. Jo, Jeong Ho Cho
Recent advances in functionally graded additive manufacturing (FGAM) technology have enabled the seamless hybridization of multiple functionalities in a single structure. Soft robotics can become one of the largest beneficiaries of these advances, through the design of a facile four-dimensional (4D) FGAM process that can grant an intelligent stimuli-responsive mechanical functionality to the printed objects. Herein, we present a simple binder jetting approach for the 4D printing of functionally graded porous multi-materials (FGMM) by introducing rationally designed graded multiphase feeder beds. Compositionally graded cross-linking agents gradually form stable porous network structures within aqueous polymer particles, enabling programmable hygroscopic deformation without complex mechanical designs. Furthermore, a systematic bed design incorporating additional functional agents enables a multi-stimuli-responsive and untethered soft robot with stark stimulus selectivity. The biodegradability of the proposed 4D-printed soft robot further ensures the sustainability of our approach, with immediate degradation rates of 96.6% within 72 h. The proposed 4D printing concept for FGMMs can create new opportunities for intelligent and sustainable additive manufacturing in soft robotics.
{"title":"Direct 4D Printing of Functionally Graded Hydrogel Networks for Biodegradable, Untethered, and Multimorphic Soft Robots","authors":"Soo Young Cho, D. Ho, S. Jo, Jeong Ho Cho","doi":"10.1088/2631-7990/ad1574","DOIUrl":"https://doi.org/10.1088/2631-7990/ad1574","url":null,"abstract":"\u0000 Recent advances in functionally graded additive manufacturing (FGAM) technology have enabled the seamless hybridization of multiple functionalities in a single structure. Soft robotics can become one of the largest beneficiaries of these advances, through the design of a facile four-dimensional (4D) FGAM process that can grant an intelligent stimuli-responsive mechanical functionality to the printed objects. Herein, we present a simple binder jetting approach for the 4D printing of functionally graded porous multi-materials (FGMM) by introducing rationally designed graded multiphase feeder beds. Compositionally graded cross-linking agents gradually form stable porous network structures within aqueous polymer particles, enabling programmable hygroscopic deformation without complex mechanical designs. Furthermore, a systematic bed design incorporating additional functional agents enables a multi-stimuli-responsive and untethered soft robot with stark stimulus selectivity. The biodegradability of the proposed 4D-printed soft robot further ensures the sustainability of our approach, with immediate degradation rates of 96.6% within 72 h. The proposed 4D printing concept for FGMMs can create new opportunities for intelligent and sustainable additive manufacturing in soft robotics.","PeriodicalId":52353,"journal":{"name":"International Journal of Extreme Manufacturing","volume":null,"pages":null},"PeriodicalIF":14.7,"publicationDate":"2023-12-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139004950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-06DOI: 10.1088/2631-7990/ad12d4
Zhiqiang Yu, Motong Li, Bingyang Cao
The heat dissipation density of electronic devices is increasing dramatically, which causes a serious heat bottleneck in electronics. Operating temperature over its rated temperature results in performance deterioration and even device damage. With the development of micro-machining technologies, microchannel heat sinks have become one of the best ways to remove the considerable amount of heat generated by the high-power electronics. It shows the advantages of large specific surface area, small size, saving coolant and high heat transfer coefficient. This paper comprehensively overviews the research progress in microchannel heat sinks and generalizes the hotspots and bottlenecks of this area. The heat transfer mechanisms and performances of different channel structures, coolants, channel materials and some other influence factors are reviewed. Besides, this paper classifies the heat transfer enhancement technology and reviews the related studies on both the single-phase and phase-change flow and heat transfer. The comprehensive review is expected to provide theoretical reference and technical guidance for further research and application of microchannel heat sinks in the future.
{"title":"A comprehensive review on microchannel heat sinks for electronics cooling","authors":"Zhiqiang Yu, Motong Li, Bingyang Cao","doi":"10.1088/2631-7990/ad12d4","DOIUrl":"https://doi.org/10.1088/2631-7990/ad12d4","url":null,"abstract":"\u0000 The heat dissipation density of electronic devices is increasing dramatically, which causes a serious heat bottleneck in electronics. Operating temperature over its rated temperature results in performance deterioration and even device damage. With the development of micro-machining technologies, microchannel heat sinks have become one of the best ways to remove the considerable amount of heat generated by the high-power electronics. It shows the advantages of large specific surface area, small size, saving coolant and high heat transfer coefficient. This paper comprehensively overviews the research progress in microchannel heat sinks and generalizes the hotspots and bottlenecks of this area. The heat transfer mechanisms and performances of different channel structures, coolants, channel materials and some other influence factors are reviewed. Besides, this paper classifies the heat transfer enhancement technology and reviews the related studies on both the single-phase and phase-change flow and heat transfer. The comprehensive review is expected to provide theoretical reference and technical guidance for further research and application of microchannel heat sinks in the future.","PeriodicalId":52353,"journal":{"name":"International Journal of Extreme Manufacturing","volume":null,"pages":null},"PeriodicalIF":14.7,"publicationDate":"2023-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138594666","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Abstract Bio-inspired macrostructure array (MAA, size: submillimeter to millimeter scale) materials with special wettability (MAAMs-SW) have attracted significant research attention due to their outstanding performance in many applications, including oil repellency, liquid/droplet manipulation, anti-icing, heat transfer, water collection, and oil–water separation. In this review, we focus on recent developments in the theory, design, fabrication, and application of bio-inspired MAAMs-SW. We first review the history of the basic theory of special wettability and discuss representative structures and corresponding functions of some biological surfaces, thus setting the stage for the design and fabrication of bio-inspired MAAMs-SW. We then summarize the fabrication methods of special wetting MAAs in terms of three categories: additive manufacturing, subtractive manufacturing, and formative manufacturing, as well as their diverse functional applications, providing insights into the development of these MAAMs-SW. Finally, the challenges and directions of future research on bio-inspired MAAMs-SW are briefly addressed. Worldwide efforts, progress, and breakthroughs from surface engineering to functional applications elaborated herein will promote the practical application of bio-inspired MAAMs-SW.
{"title":"Recent Progress in Bio-Inspired Macrostructure Array Materials with Special Wettability − From Surface Engineering to Functional Applications","authors":"Zhongxu Lian, Jianhui Zhou, Wanfei Ren, Faze Chen, Jinkai Xu, Yanling Tian, Huadong Yu","doi":"10.1088/2631-7990/ad0471","DOIUrl":"https://doi.org/10.1088/2631-7990/ad0471","url":null,"abstract":"Abstract Bio-inspired macrostructure array (MAA, size: submillimeter to millimeter scale) materials with special wettability (MAAMs-SW) have attracted significant research attention due to their outstanding performance in many applications, including oil repellency, liquid/droplet manipulation, anti-icing, heat transfer, water collection, and oil–water separation. In this review, we focus on recent developments in the theory, design, fabrication, and application of bio-inspired MAAMs-SW. We first review the history of the basic theory of special wettability and discuss representative structures and corresponding functions of some biological surfaces, thus setting the stage for the design and fabrication of bio-inspired MAAMs-SW. We then summarize the fabrication methods of special wetting MAAs in terms of three categories: additive manufacturing, subtractive manufacturing, and formative manufacturing, as well as their diverse functional applications, providing insights into the development of these MAAMs-SW. Finally, the challenges and directions of future research on bio-inspired MAAMs-SW are briefly addressed. Worldwide efforts, progress, and breakthroughs from surface engineering to functional applications elaborated herein will promote the practical application of bio-inspired MAAMs-SW.","PeriodicalId":52353,"journal":{"name":"International Journal of Extreme Manufacturing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135087725","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-11-03DOI: 10.1088/2631-7990/ad01fe
Zhiwen Shu, Bo Feng, Peng Liu, Lei Chen, Huikang Liang, Yiqin Chen, Jianwu Yu, Huigao Duan
Abstract There is an urgent need for novel processes that can integrate different functional nanostructures onto specific substrates, so as to meet the fast-growing need for broad applications in nanoelectronics, nanophotonics, and flexible optoelectronics. Existing direct-lithography methods are difficult to use on flexible, nonplanar, and biocompatible surfaces. Therefore, this fabrication is usually accomplished by nanotransfer printing. However, large-scale integration of multiscale nanostructures with unconventional substrates remains challenging because fabrication yields and quality are often limited by the resolution, uniformity, adhesivity, and integrity of the nanostructures formed by direct transfer. Here, we proposed a resist-based transfer strategy enabled by near-zero adhesion, which was achieved by molecular modification to attain a critical surface energy interval. This approach enabled the intact transfer of wafer-scale, ultrathin-resist nanofilms onto arbitrary substrates with mitigated cracking and wrinkling, thereby facilitating the in situ fabrication of nanostructures for functional devices. Applying this approach, fabrication of three-dimensional-stacked multilayer structures with enhanced functionalities, nanoplasmonic structures with ∼10 nm resolution, and MoS 2 -based devices with excellent performance was demonstrated on specific substrates. These results collectively demonstrated the high stability, reliability, and throughput of our strategy for optical and electronic device applications.
{"title":"Near-zero-adhesion-enabled intact wafer-scale resist-transfer printing for high-fidelity nanofabrication on arbitrary substrates","authors":"Zhiwen Shu, Bo Feng, Peng Liu, Lei Chen, Huikang Liang, Yiqin Chen, Jianwu Yu, Huigao Duan","doi":"10.1088/2631-7990/ad01fe","DOIUrl":"https://doi.org/10.1088/2631-7990/ad01fe","url":null,"abstract":"Abstract There is an urgent need for novel processes that can integrate different functional nanostructures onto specific substrates, so as to meet the fast-growing need for broad applications in nanoelectronics, nanophotonics, and flexible optoelectronics. Existing direct-lithography methods are difficult to use on flexible, nonplanar, and biocompatible surfaces. Therefore, this fabrication is usually accomplished by nanotransfer printing. However, large-scale integration of multiscale nanostructures with unconventional substrates remains challenging because fabrication yields and quality are often limited by the resolution, uniformity, adhesivity, and integrity of the nanostructures formed by direct transfer. Here, we proposed a resist-based transfer strategy enabled by near-zero adhesion, which was achieved by molecular modification to attain a critical surface energy interval. This approach enabled the intact transfer of wafer-scale, ultrathin-resist nanofilms onto arbitrary substrates with mitigated cracking and wrinkling, thereby facilitating the in situ fabrication of nanostructures for functional devices. Applying this approach, fabrication of three-dimensional-stacked multilayer structures with enhanced functionalities, nanoplasmonic structures with ∼10 nm resolution, and MoS 2 -based devices with excellent performance was demonstrated on specific substrates. These results collectively demonstrated the high stability, reliability, and throughput of our strategy for optical and electronic device applications.","PeriodicalId":52353,"journal":{"name":"International Journal of Extreme Manufacturing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-11-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135775279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Highlights High-energy ball milling was proposed to construct oxygen vacancy defects. Scaffold with individualized shape and porous structure was fabricated by selective laser sintering. Antibacterial material was used to adsorb H 2 O 2 to the site of bacterial infection. The accumulated H 2 O 2 could amplify the Fenton reaction efficiency to induce more ·OH. The scaffold possessed matched mechanical properties and good biocompatibility.
{"title":"Oxygen vacancy boosting Fenton reaction in bone scaffold towards fighting bacterial infection","authors":"cijun shuai, Xiaoxin Shi, Feng Yang, Haifeng Tian, Pei Feng","doi":"10.1088/2631-7990/ad01fd","DOIUrl":"https://doi.org/10.1088/2631-7990/ad01fd","url":null,"abstract":"Highlights High-energy ball milling was proposed to construct oxygen vacancy defects. Scaffold with individualized shape and porous structure was fabricated by selective laser sintering. Antibacterial material was used to adsorb H 2 O 2 to the site of bacterial infection. The accumulated H 2 O 2 could amplify the Fenton reaction efficiency to induce more ·OH. The scaffold possessed matched mechanical properties and good biocompatibility.","PeriodicalId":52353,"journal":{"name":"International Journal of Extreme Manufacturing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135513672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-18DOI: 10.1088/2631-7990/ad0472
Bo Yao, Nan KANG, Xiangyu Li, Dou Li, Mohamed El Mansori, Jing Chen, Haiou Yang, Hua Tan, Xin LIN
Abstract Nd-Fe-B permanent magnets are critical components for energy conversion and electronic devices. The key magnetic properties of Nd-Fe-B magnets, especially the coercivity and remanent magnetization, are strongly dependent on the phase characteristics and microstructure. In this work, Nd-Fe-B magnets were prepared using vacuum induction melting (VIM), laser directed energy deposition (LDED) and laser powder bed fusion (LPBF) technologies. The microstructure evolution and phase selection of Nd-Fe-B magnets were clarified in detail. The results indicated that the solidification velocity (V) and cooling rate (R) are key factors in determining the phase selection. In terms of the VIM-casting Nd-Fe-B magnet, a large volume fraction of the soft magnetic α-Fe phase (39.7 vol.%) and Nd2Fe17Bx metastable phase (34.7 vol.%) are formed due to the low R (2.3×10-1 ℃/s), while the hard magnetic Nd2Fe14B phase is only 5.15 vol.%. With increasing V (<10-2 m/s) and R (5.06×103 ℃/s), part of the soft magnetic α-Fe phase (31.7 vol.%) was suppressed, more Nd2Fe17Bx metastable phases (47.5 vol.%) were formed in the LDED-processed Nd-Fe-B magnet, and the hard magnetic Nd2Fe14B phase also had a low value (3.4 vol.%). As a result, the casting- and LDED-processed Nd-Fe-B magnets exhibit poor magnetic properties. In contrast, the high V (>10-2 m/s) and R (1.45×106 ℃/s) led to the formation of the hard magnetic Nd2Fe14B phase (55.8 vol.%) from liquid, and the α-Fe phase and Nd2Fe17Bx phase precipitation were suppressed in the LPBF-processed Nd-Fe-B magnet. Furthermore, the strong crystallographic texture on the {001} crystal plane is another reason for the remanence enhancement in the LPBF-processed Nd-Fe-B magnets. Consequently, a coercivity of 656 kA/m, a remanence of 0.79 T and maximum energy product of 71.5 kJ/m3 was achieved in the LPBF-processed Nd-Fe-B magnet, which indicated excellent magnetic performance, comparable to other additive manufacturing processed Nd-Fe-B magnets from MQP (Nd-lean) Nd-Fe-B powder.
{"title":"Toward understanding the microstructure characteristics, phase selection and magnetic properties of laser additive manufactured Nd-Fe-B permanent magnets","authors":"Bo Yao, Nan KANG, Xiangyu Li, Dou Li, Mohamed El Mansori, Jing Chen, Haiou Yang, Hua Tan, Xin LIN","doi":"10.1088/2631-7990/ad0472","DOIUrl":"https://doi.org/10.1088/2631-7990/ad0472","url":null,"abstract":"Abstract Nd-Fe-B permanent magnets are critical components for energy conversion and electronic devices. The key magnetic properties of Nd-Fe-B magnets, especially the coercivity and remanent magnetization, are strongly dependent on the phase characteristics and microstructure. In this work, Nd-Fe-B magnets were prepared using vacuum induction melting (VIM), laser directed energy deposition (LDED) and laser powder bed fusion (LPBF) technologies. The microstructure evolution and phase selection of Nd-Fe-B magnets were clarified in detail. The results indicated that the solidification velocity (V) and cooling rate (R) are key factors in determining the phase selection. In terms of the VIM-casting Nd-Fe-B magnet, a large volume fraction of the soft magnetic α-Fe phase (39.7 vol.%) and Nd2Fe17Bx metastable phase (34.7 vol.%) are formed due to the low R (2.3×10-1 ℃/s), while the hard magnetic Nd2Fe14B phase is only 5.15 vol.%. With increasing V (<10-2 m/s) and R (5.06×103 ℃/s), part of the soft magnetic α-Fe phase (31.7 vol.%) was suppressed, more Nd2Fe17Bx metastable phases (47.5 vol.%) were formed in the LDED-processed Nd-Fe-B magnet, and the hard magnetic Nd2Fe14B phase also had a low value (3.4 vol.%). As a result, the casting- and LDED-processed Nd-Fe-B magnets exhibit poor magnetic properties. In contrast, the high V (>10-2 m/s) and R (1.45×106 ℃/s) led to the formation of the hard magnetic Nd2Fe14B phase (55.8 vol.%) from liquid, and the α-Fe phase and Nd2Fe17Bx phase precipitation were suppressed in the LPBF-processed Nd-Fe-B magnet. Furthermore, the strong crystallographic texture on the {001} crystal plane is another reason for the remanence enhancement in the LPBF-processed Nd-Fe-B magnets. Consequently, a coercivity of 656 kA/m, a remanence of 0.79 T and maximum energy product of 71.5 kJ/m3 was achieved in the LPBF-processed Nd-Fe-B magnet, which indicated excellent magnetic performance, comparable to other additive manufacturing processed Nd-Fe-B magnets from MQP (Nd-lean) Nd-Fe-B powder.","PeriodicalId":52353,"journal":{"name":"International Journal of Extreme Manufacturing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135824453","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Highlights WE43 parts with favorable forming quality are fabricated by laser-beam powder bed fusion and the interaction between laser beam and powder is revealed. After suitable heat treatment, the anisotropic microstructure is eliminated, with nano-scaled Mg 24 Y 5 particles homogeneously precipitated. The yield strength and ultimate tensile strength are improved to (250.2 ± 3.5) MPa and (312 ± 3.7) MPa, respectively, while the elongation still maintains at high level of 15.2%. Homogenized microstructure inhibits the micro galvanic corrosion and promotes the development of passivation film, thus decreasing the degradation rate by an order of magnitude. The porous WE43 scaffolds offer a favorable environment for cell growth.
{"title":"Influence of heat treatment on microstructure, mechanical and corrosion behavior of WE43 alloy fabricated by laser-beam powder bed fusion","authors":"chenrong ling, qiang li, zhe zhang, Youwen Yang, wenhao zhou, wenlong chen, zhi dong, chunrong pan, cijun shuai","doi":"10.1088/2631-7990/acfad5","DOIUrl":"https://doi.org/10.1088/2631-7990/acfad5","url":null,"abstract":"Highlights WE43 parts with favorable forming quality are fabricated by laser-beam powder bed fusion and the interaction between laser beam and powder is revealed. After suitable heat treatment, the anisotropic microstructure is eliminated, with nano-scaled Mg 24 Y 5 particles homogeneously precipitated. The yield strength and ultimate tensile strength are improved to (250.2 ± 3.5) MPa and (312 ± 3.7) MPa, respectively, while the elongation still maintains at high level of 15.2%. Homogenized microstructure inhibits the micro galvanic corrosion and promotes the development of passivation film, thus decreasing the degradation rate by an order of magnitude. The porous WE43 scaffolds offer a favorable environment for cell growth.","PeriodicalId":52353,"journal":{"name":"International Journal of Extreme Manufacturing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135944111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-16DOI: 10.1088/2631-7990/ad038f
Yang Sha, menghui zhu, Kun Huang, Yang Zhang, Francis Moissinac, zhizhou zhang, Dongxu Cheng, Paul Mativenga, Zhu Liu
Abstract Electrochemical production of hydrogen from water requires the development of electrocatalysts that are active, stable, and low-cost for water splitting. In comparison with conventional powder-based electrode preparation, synthesis of binder-free electrocatalytic integrated electrodes is highly desirable to improve the catalytic activity and long-term stability for large-scale applications of electrocatalysts. Herein, we demonstrate a laser-induced hydrothermal (LIHR) technique to grow NiMoO4 nanosheets on Nickel foam, which is then calcined under H2/Ar mixed gases to prepare the integrated electrode IE-NiMo-LR. This electrode exhibits superior hydrogen evolution reaction performance, requiring overpotentials of 59, 116 and 143 mV to achieve current densities of 100, 500 and 1000 mA cm-2. During the 350 h chronopotentiometry test at current densities of 100 and 500 mA cm-2, the overpotential remained essentially unchanged. In addition, NiFe-layered double hydroxide grown on Ni foam is fabricated with same LIHR method and coupled with IE-NiMo-IR to achieve water splitting. This combination exhibits excellent durability under industrial current density. The energy consumption and production efficiency of LIHR method are systematically compared with conventional hydrothermal method. The LIHR method significantly improved the production rate by over 19 times, while consuming only 27.78% of the total energy required by conventional hydrothermal method to achieve the same production.
摘要电化学从水中制氢需要开发出活性、稳定、低成本的水分解电催化剂。与传统的粉末电极制备相比，为了提高电催化剂的大规模应用的催化活性和长期稳定性，合成无粘结剂的电催化集成电极是非常理想的。在此，我们展示了激光诱导水热(LIHR)技术在泡沫镍上生长NiMoO4纳米片，然后在H2/Ar混合气体下煅烧制备集成电极ie - nimo4 - lr。该电极具有优异的析氢反应性能，需要59、116和143 mV的过电位才能达到100、500和1000 mA cm-2的电流密度。在100和500 mA cm-2的电流密度下进行350小时时电位测定试验，过电位基本保持不变。此外，采用相同的LIHR方法制备了Ni泡沫上生长的nife层状双氢氧化物，并结合IE-NiMo-IR实现了水裂解。这种组合在工业电流密度下表现出优异的耐久性。对LIHR法的能耗和生产效率与传统水热法进行了系统比较。LIHR法的产量提高了19倍以上，而达到相同产量所需的总能量仅为传统水热法的27.78%。
{"title":"Towards a new avenue for rapid synthesis of electrocatalytic electrodes via laser-induced hydrothermal reaction for water splitting","authors":"Yang Sha, menghui zhu, Kun Huang, Yang Zhang, Francis Moissinac, zhizhou zhang, Dongxu Cheng, Paul Mativenga, Zhu Liu","doi":"10.1088/2631-7990/ad038f","DOIUrl":"https://doi.org/10.1088/2631-7990/ad038f","url":null,"abstract":"Abstract Electrochemical production of hydrogen from water requires the development of electrocatalysts that are active, stable, and low-cost for water splitting. In comparison with conventional powder-based electrode preparation, synthesis of binder-free electrocatalytic integrated electrodes is highly desirable to improve the catalytic activity and long-term stability for large-scale applications of electrocatalysts. Herein, we demonstrate a laser-induced hydrothermal (LIHR) technique to grow NiMoO4 nanosheets on Nickel foam, which is then calcined under H2/Ar mixed gases to prepare the integrated electrode IE-NiMo-LR. This electrode exhibits superior hydrogen evolution reaction performance, requiring overpotentials of 59, 116 and 143 mV to achieve current densities of 100, 500 and 1000 mA cm-2. During the 350 h chronopotentiometry test at current densities of 100 and 500 mA cm-2, the overpotential remained essentially unchanged. In addition, NiFe-layered double hydroxide grown on Ni foam is fabricated with same LIHR method and coupled with IE-NiMo-IR to achieve water splitting. This combination exhibits excellent durability under industrial current density. The energy consumption and production efficiency of LIHR method are systematically compared with conventional hydrothermal method. The LIHR method significantly improved the production rate by over 19 times, while consuming only 27.78% of the total energy required by conventional hydrothermal method to achieve the same production.","PeriodicalId":52353,"journal":{"name":"International Journal of Extreme Manufacturing","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2023-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136079228","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-10-13DOI: 10.1088/2631-7990/acfd68
Siqi Xie, Hongxin Zhu, Xing Zhang, Haidong Wang
Abstract Phonons are the quantum mechanical descriptions of vibrational modes that manifest themselves in many physical properties of condensed matter systems. As the size of electronic devices continues to decrease below mean free paths of acoustic phonons, the engineering of phonon spectra at the nanoscale becomes an important topic. Phonon manipulation allows for active control and management of heat flow, enabling functions such as regulated heat transport. At the same time, phonon transmission, as a novel signal transmission method, holds great potential to revolutionize modern industry like microelectronics technology, and boasts wide-ranging applications. Unlike fermions such as electrons, polarity regulation is difficult to act on phonons as bosons, making the development of effective phonon modulation methods a daunting task. This work reviews the development of phonon engineering and strategies of phonon manipulation at different scales, reports the latest research progress of nanophononic devices such as thermal rectifiers, thermal transistors, thermal memories, and thermoelectric devices, and analyzes the phonon transport mechanisms involved. Lastly, we survey feasible perspectives and research directions of phonon engineering. Thermoelectric analogies, external field regulation, and acousto-optic co-optimization are expected to become future research hotspots.
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