Journal of Magnesium and Alloys最新文献_第9页

In vitro degradation and in vivo osteogenesis of Mg-Zn-Nd-Zr/HA composites prepared by friction stir processing 搅拌摩擦法制备Mg-Zn-Nd-Zr/HA复合材料的体外降解和体内成骨研究

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2024-12-01 DOI: 10.1016/j.jma.2023.09.030

Wen Zhang , Jiarui Lu , Lili Tan , Dingrui Ni , Ran Zhang , Qing Zhou , Ke Yang , Qiang Wang

{"title":"In vitro degradation and in vivo osteogenesis of Mg-Zn-Nd-Zr/HA composites prepared by friction stir processing","authors":"Wen Zhang , Jiarui Lu , Lili Tan , Dingrui Ni , Ran Zhang , Qing Zhou , Ke Yang , Qiang Wang","doi":"10.1016/j.jma.2023.09.030","DOIUrl":"10.1016/j.jma.2023.09.030","url":null,"abstract":"<div><div>Biodegradable magnesium-matrix composites (BMMCs) added with bone-like compounds such as hydroxyapatite (HA) have promising orthopedic application potential, but the in vivo results of BMMCs are insufficient, and the difference between in vitro and in vivo are not clarified. In this work, Mg-Zn-Nd-Zr/(10/15/20wt%) HA (Ca<sub>10</sub>(PO<sub>4</sub>)<sub>6</sub>OH<sub>2</sub>) composites were prepared through friction stirring processing (FSP). It was found that corrosion rate of the composites increased with increase of the HA content, where the corrosion rate from hydrogen evolution of the Mg/10wt% HA was about 0.107 mm/y, showing better corrosion resistance compared with other BMMCs, and the agglomeration of HA powders significantly aggravated the localized corrosion. The ALP specific activity of the MC3T3-E1 cells cultured for 14 days with Mg/10wt% HA (2.12 IU/mg) was higher than that of the matrix (1.85 IU/mg), but there was no difference with the FSP group (2.13 IU/mg). In the early implantation of the rabbit femur, bone volume fraction (BV/TV) of Mg/10wt% HA was 10.69, which was higher than that of the FSP group (6.35). The histological staining showed that the Mg/10wt% HA implant was surrounded by more trabecular bone tissue, exhibiting better osteoinductive regeneration. The Mg-Zn-Nd-Zr/HA composites exhibit higher osteogenic activity in vivo differently from in vitro osteogenic expression.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"12 12","pages":"Pages 4937-4952"},"PeriodicalIF":15.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"71417747","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Layered double hydroxide-derived Mg2Ni/TiH1.5 composite catalysts for enhancing hydrogen storage performance of MgH2 层状双氢氧化物衍生Mg2Ni/TiH1.5复合催化剂提高MgH2储氢性能

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2024-12-01 DOI: 10.1016/j.jma.2023.10.003

Gang Huang , Yao Lu , Xiaofang Liu , Wukui Tang , Xinyu Li , Feng Wang , Jianglan Shui , Ronghai Yu

{"title":"Layered double hydroxide-derived Mg2Ni/TiH1.5 composite catalysts for enhancing hydrogen storage performance of MgH2","authors":"Gang Huang , Yao Lu , Xiaofang Liu , Wukui Tang , Xinyu Li , Feng Wang , Jianglan Shui , Ronghai Yu","doi":"10.1016/j.jma.2023.10.003","DOIUrl":"10.1016/j.jma.2023.10.003","url":null,"abstract":"<div><div>Developing efficient catalysts is of great significance in improving the sluggish kinetics and high desorption temperature of MgH<sub>2</sub> hydrogen storage material. Here, ultrathin NiTi-layered double hydroxide (NiTi-LDH) nanosheets are used as precursors to prepare Mg<sub>2</sub>Ni/TiH<sub>1.5</sub> composite catalysts to improve the hydrogen storage properties of MgH<sub>2</sub>. The variation of Ni/Ti ratio in LDH plays an important role in regulating the composition, morphology and distribution of Mg<sub>2</sub>Ni/TiH<sub>1.5</sub> catalysts, which significantly affect their synergistic catalytic effect. Mg<sub>2</sub>Ni/TiH<sub>1.5</sub> composite catalyst exhibits significantly improved catalytic performance compared with conventional Ni-, Ti- and Ni/Ti-based catalysts. The optimal MgH<sub>2</sub>/Mg<sub>2</sub>Ni/TiH<sub>1.5</sub> system shows a significantly reduced desorption temperature of 212 °C which is 133 °C lower than that of pure MgH<sub>2</sub> (345 °C), and can release 5.97 wt% hydrogen within 300s at 300 °C. Further mechanism analysis reveals that the unique flaky morphology and suitable composition of Ni/Ti LDH can significantly enhance the synergistic effect of Mg<sub>2</sub>Ni and TiH<sub>1.5</sub>, which promotes the fracture of the H<img>H and Mg-H bonds.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"12 12","pages":"Pages 4966-4975"},"PeriodicalIF":15.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138473777","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhancement of the corrosion resistance of the Mg alloy ZW61 by dual-frequency ultrasonic vibration 通过双频超声波振动提高镁合金 ZW61 的耐腐蚀性能

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2024-12-01 DOI: 10.1016/j.jma.2023.12.003

Zhaoyang Yin , Qichi Le , Qi Zou , Liang Ren , Weiyang Zhou , Yanchao Jiang , Xingrui Chen , Andrej Atrens , Qiyu Liao

{"title":"Enhancement of the corrosion resistance of the Mg alloy ZW61 by dual-frequency ultrasonic vibration","authors":"Zhaoyang Yin , Qichi Le , Qi Zou , Liang Ren , Weiyang Zhou , Yanchao Jiang , Xingrui Chen , Andrej Atrens , Qiyu Liao","doi":"10.1016/j.jma.2023.12.003","DOIUrl":"10.1016/j.jma.2023.12.003","url":null,"abstract":"<div><div>Ultrasonic vibration was introduced into the casting of quasicrystal-reinforced magnesium alloy ZW61. The microstructure, mechanical properties, and corrosion resistance were studied. The dual-frequency ultrasonic field (DUF) treatment reduced the α-Mg grain size from 502 µm to 69 µm, and the aggregated lamellar I-phase was refined into tiny dot-like shapes with a smaller area fraction. Static corrosion and electrochemical tests indicated that DUF decreased the corrosion rate from 10 mm·y<sup>−1</sup> to 3 mm·y<sup>−1</sup> with a denser protective oxide film. DUF not only significantly enlarged the effective cavitation area but also reduced the dependence of transient cavitation on the initial bubble radius. The ratio <em>R</em><sub>max</sub><sup>3</sup>/<em>t</em><sub>c</sub> was used to qualitatively characterize the cavitation strength, and cavitation dynamics calculations indicated that DUF had higher cavitation strength compared to single-frequency ultrasonic field (SUF). An equation for corrosion rate versus microstructural parameters (grain size, second phase fraction, potential difference) was developed, which could well predict the corrosion rate of magnesium alloy ZW61 without and with different ultrasonic vibrations.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"12 12","pages":"Pages 4887-4908"},"PeriodicalIF":15.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139504795","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Unraveling the impact of purification and alloying elements on corrosion performance and passivation of magnesium alloys 揭示了净化和合金元素对镁合金腐蚀性能和钝化的影响

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2024-12-01 DOI: 10.1016/j.jma.2024.11.023

Arash Fattah-alhosseini , Razieh Chaharmahali , Alireza Askari , Sajad Alizad , Mosab Kaseem

{"title":"Unraveling the impact of purification and alloying elements on corrosion performance and passivation of magnesium alloys","authors":"Arash Fattah-alhosseini , Razieh Chaharmahali , Alireza Askari , Sajad Alizad , Mosab Kaseem","doi":"10.1016/j.jma.2024.11.023","DOIUrl":"10.1016/j.jma.2024.11.023","url":null,"abstract":"<div><div>The passivation of magnesium (Mg)-based alloys is an electrochemical behavior. The formation of a protective surface film results in passivation. The composition of this surface layer is influenced by the substrate alloy, which in turn affects the passive behavior. Recent studies have examined the composition of the surface film when Mg alloys undergo corrosion. Most of these studies have focused on the presence of Mg hydroxide (Mg(OH)<sub>2</sub>) and MgO in the layer. However, a systematic examination of the impact of alloying elements on the stability of the passive layer is lacking. The essential question for developing a corrosion-resistant Mg-based alloy with passive protection is: which are the best and most efficient elements that can form a passive layer when alloyed with Mg? Passivity in a Mg alloy could be achieved by using a non-equilibrium technique to supersaturate the matrix phase with a high concentration of a strong passivating element. This review paper examines and explores the potential of creating a passive Mg-based alloy using metallurgical methods, like alloying and purification. Additionally, this paper explains key concepts about the passivity of Mg alloys and proposes possible methods to create a passive Mg alloy.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"12 12","pages":"Pages 4808-4827"},"PeriodicalIF":15.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142763119","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interface enhancement mechanism of rolled Mg/Al clad plate with particle interface control

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2024-12-01 DOI: 10.1016/j.jma.2024.06.013

Xiaobao Ma , Peng Li , Tao Wang , Zhongkai Ren , Peng Chen , Jiang Ji

{"title":"Interface enhancement mechanism of rolled Mg/Al clad plate with particle interface control","authors":"Xiaobao Ma , Peng Li , Tao Wang , Zhongkai Ren , Peng Chen , Jiang Ji","doi":"10.1016/j.jma.2024.06.013","DOIUrl":"10.1016/j.jma.2024.06.013","url":null,"abstract":"<div><div>In this study, the cold-spraying process was utilized to deposit Al particles onto an Al slab, an Mg slab, and both Al and Mg slabs to form an ultra-thin interlayer, and then the clad slabs were rolled at 400 °C, developing three roll-bonding processes: the roll-bonding process with cold-sprayed Al powder on the Al slab (CS-Al), the roll-bonding process with cold-sprayed Al powder on the Mg slab (CS-Mg), and the roll-bonding process with cold-sprayed Al powder on both the Al slab and the Mg slab (CS-Both). The effects of three different cold-sprayed Al particle interlayer processes on the mechanical properties of rolled Mg/Al clad plates were investigated to improve the mechanical properties. The microstructure, texture evolution, intermetallic compound formation, mechanical properties, and mechanisms involved in the Mg/Al clad plate rolling were systematically investigated. The results showed that the pre-bonding between the particles and the substrates through cold-spraying had a significant impact on the bonding strength of the Mg/Al clad plates, and the CS-Both process can increase the average shear strength of the Mg/Al clad plates to 49.24 MPa at a medium reduction rate of 37.5 %, 2.5 times that of the conventional rolling process. The CS-Both process constructed more evident dual microscopic three-dimensional interfaces and promoted more thorough atomic diffusion at the interface through the double-sided cold-spraying process. Meanwhile, the dual cold-sprayed Al coatings on both the Mg slab and Al slab underwent dynamic recrystallization during rolling to form a homogeneous unit with no additional coating interfaces. Fine grain strengthening and dislocation strengthening were judged to be important mechanisms for improving the mechanical performance of the interfacial layer.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"12 12","pages":"Pages 5079-5094"},"PeriodicalIF":15.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143355096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of copper addition on precipitation behaviors and mechanical properties of Mg-Zn-Cu alloys with respect to high zinc 添加铜对高锌镁锌铜合金沉淀行为和机械性能的影响

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2024-12-01 DOI: 10.1016/j.jma.2023.07.019

Ye Zhou , Shengli Li , Pingli Mao , Xingang Ai , Qinghe Xiao , Zheng Liu

{"title":"Effect of copper addition on precipitation behaviors and mechanical properties of Mg-Zn-Cu alloys with respect to high zinc","authors":"Ye Zhou , Shengli Li , Pingli Mao , Xingang Ai , Qinghe Xiao , Zheng Liu","doi":"10.1016/j.jma.2023.07.019","DOIUrl":"10.1016/j.jma.2023.07.019","url":null,"abstract":"<div><div>The current work deals with the precipitation behaviors and mechanical properties of the high zinc content of the Mg-Zn-Cu system alloys using gravity casting. Differential scanning calorimetry (DSC) was conducted to describe the solidification process and precipitation behaviors. Thermodynamic calculations were carried out to determine the precipitation conditions using the Thermo-calc software. The microstructures were characterized by an optical microscope (OM), scanning electron microscope (SEM), electron probe micro analysis (EPMA), transmission electron microscopy (TEM), and confocal laser scanning microscope (CLSM). Tensile tests and micro-hardness tests were applied to investigate the mechanical properties. The results substantiated that the MgZnCu phase precipitates in Cu-containing alloys and that the precipitate content, as well as the precipitate temperature, increased with the Cu content from 0 to 3 wt.% according to the thermodynamic calculations and the DSC results. The measured micro-hardness of the alloy was 53.2, 57.9, 55.8, and 52.5 VHN, respectively. The ultimate tensile strength (UTS), yield strength (YS), and elongation (EL) revealed a λ-like trend of the alloys, and Mg-7Zn-1Cu alloy exhibits the optimum tensile properties with the UTS of 258.9 MPa, YS of 126.2 MPa, and the EL of 14.2%.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"12 12","pages":"Pages 5194-5204"},"PeriodicalIF":15.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139081817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The influence of Sm2O3 dopant on structure, morphology and transport critical current density of MgB2 wires investigated by using the transmission electron microscope 利用透射电镜研究了Sm2O3掺杂对MgB2导线结构、形貌和输运临界电流密度的影响

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2024-12-01 DOI: 10.1016/j.jma.2024.12.009

Daniel Gajda , Michał Babij , Andrzej Zaleski , Doğan Avci , Fırat Karaboga , Hakan Yetis , Ibrahim Belenli , Dariusz Zasada , Damian Szymański , Małgorzata Małecka , Wojciech Gil , Tomasz Czujko

{"title":"The influence of Sm2O3 dopant on structure, morphology and transport critical current density of MgB2 wires investigated by using the transmission electron microscope","authors":"Daniel Gajda , Michał Babij , Andrzej Zaleski , Doğan Avci , Fırat Karaboga , Hakan Yetis , Ibrahim Belenli , Dariusz Zasada , Damian Szymański , Małgorzata Małecka , Wojciech Gil , Tomasz Czujko","doi":"10.1016/j.jma.2024.12.009","DOIUrl":"10.1016/j.jma.2024.12.009","url":null,"abstract":"<div><div>This study reports results for the morphology, crystal structure and critical parameters of Sm<sub>2</sub>O<sub>3</sub>-doped MgB<sub>2</sub> wires with low and high initial filling densities. The transmission electron microscope (TEM) images were done for the longitudinal section of MgB<sub>2</sub> wires. The results show that the Sm<sub>2</sub>O<sub>3</sub> admixture significantly changes the morphology of the MgB<sub>2</sub> material, accelerates the formation of the MgB<sub>2</sub> phase, does not form rectangular MgB<sub>2</sub> crystallites, does not leave pure Mg, and forms Sm<sub>2</sub>O<sub>3</sub> areas of 10 nm and 20 nm. The effects of Sm<sub>2</sub>O<sub>3</sub> addition on MgB<sub>2</sub> formation in superconducting wires were revealed in detail in this study. Additionally, Sm<sub>2</sub>O<sub>3</sub> causes the formation of point pinning regions that significantly increase the critical transport current density at the temperature range from 15 K to 30 K. The TEM images point out that rectangular MgB<sub>2</sub> crystallites are formed in undoped MgB<sub>2</sub> wires, which have not been previously reported. XRPD results showed that short-term heating allowed obtaining a larger amount of MgB<sub>2</sub> phase for the MgB<sub>2</sub> wire with high initial filling density. On the other hand, long heating time and high initial density slow down the creation of MgB<sub>2</sub> phase when the Mg is in the solid state.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"12 12","pages":"Pages 5061-5078"},"PeriodicalIF":15.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142848860","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Regulating Mg / Fe interfacial compound formation by in-situ alloying with Gd and Y 用钆和钇原位合金调节镁/铁界面化合物的形成

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2024-12-01 DOI: 10.1016/j.jma.2024.01.016

Qiang Lang , Nan Li , Xin Liu , Muhammad Shehryar Khan , Gang Song , Liming Liu

{"title":"Regulating Mg / Fe interfacial compound formation by in-situ alloying with Gd and Y","authors":"Qiang Lang , Nan Li , Xin Liu , Muhammad Shehryar Khan , Gang Song , Liming Liu","doi":"10.1016/j.jma.2024.01.016","DOIUrl":"10.1016/j.jma.2024.01.016","url":null,"abstract":"<div><div>This study revealed that the presence of Cr and Ni in stainless steel is one of the leading causes for the weakening of the Mg / Fe interface when using a traditional Mg-Zn-Al (i.e., AZ61) filler wire. By using a novel Mg-Gd-Y-Zr filler wire without Al, the interfacial structure between Mg / Fe was optimized, and the joint integrity was significantly improved. Using advanced multiscale characterization tools, the coherent matching mechanism of rare earth elements in regulating Mg / Fe interfacial compounds was clarified. The results showed that Gd and Y exhibited lower diffusion activation energy and faster diffusion rates in Fe compared to Al resulting in IMCs with more stiffness and mechanical integrity than Al-Mg compounds that are generated at the Mg / Fe interface when using the AZ61 filler wire. High-resolution TEM results revealed that the lattice distortion caused by the diffusion of metal elements changes the original semi-coherent matching interfaces of (0 0 0 1)<sub>HCP−Mg</sub> and (0 1 2)<sub>BCC−Mg24(Y, Gd)5</sub>, as well as lattice planes of (0 1 2)<sub>BCC−Mg24(Y, Gd)5</sub> and (5<span><math><mrow><mspace></mspace><mover><mn>7</mn><mo>¯</mo></mover></mrow></math></span> 2 3)<sub>HCP-Fe17(Y, Gd)2</sub> into a coherent matching interface, which is known to improve mechanical strength. Although lattice planes of (5<span><math><mrow><mspace></mspace><mover><mn>7</mn><mo>¯</mo></mover></mrow></math></span> 2 3)<sub>HCP-Fe17(Y, Gd)2</sub> and (1 1 1)<sub>BCC-Fe</sub> were found to be incoherent interfaces, it was found that Gd, Y, and Zr with larger atomic radii compared to Al diffused into the bulk Fe to form a wide range of (Fe, Gd, Y, Zr, Cr, Ni, Mn) interstitial solid solutions, which helped strengthen the integrity of the joint. The results showed that the load bearing capacity of the AZ31B / Mg-RE / 316 L joint was about 290 N/mm, which is 2.5 times that of the AZ31B / AZ61 / 316 L joints, which was measured at 115 N/mm.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"12 12","pages":"Pages 5179-5193"},"PeriodicalIF":15.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139573996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Understanding activation and growth of twin variants in polycrystalline magnesium under tension and compression: An atomistic study 了解多晶镁在拉伸和压缩条件下孪晶变体的活化和生长：原子研究

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2024-12-01 DOI: 10.1016/j.jma.2024.12.007

Huicong Chen , Cheng Chen , Jun Song , Stephen Yue

{"title":"Understanding activation and growth of twin variants in polycrystalline magnesium under tension and compression: An atomistic study","authors":"Huicong Chen , Cheng Chen , Jun Song , Stephen Yue","doi":"10.1016/j.jma.2024.12.007","DOIUrl":"10.1016/j.jma.2024.12.007","url":null,"abstract":"<div><div>Deformation twinning is known to be important in the acquisition of plasticity for hexagonal close-packed crystal structures, of great implication to the design and development of novel high-strength Mg alloys with enhanced formability. Accurate understanding of deformation twinning necessitates critical mechanistic knowledge of the activation and selection of twins at nanoscale. In this work, considering polycrystalline Mg, we performed comprehensive molecular dynamics simulations to investigate deformation twinning under uniaxial tension and compression loading. An algorithm has been developed and implemented to identify the active twin variants of three operating twin modes during deformation. Sharp contrast between tension and compression loading in terms of twin patterns and twin growth was observed, attributed to difference in twin variant activation and twin-twin interaction under the two loading conditions. Furthermore, the critical role of Schmid factor in twin variant activation and selection has been elucidated, in good agreement with experimental observations. This study contributes critical insights towards advancing our understanding of the complex behaviors of deformation twinning in polycrystalline Mg.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"12 12","pages":"Pages 4923-4936"},"PeriodicalIF":15.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142832012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Constructing VO/V2O3 interface to enhance hydrogen storage performance of MgH2 构建 VO/V2O3 界面以提高 MgH2 的储氢性能

IF 15.8 1区材料科学

Journal of Magnesium and Alloys Pub Date : 2024-12-01 DOI: 10.1016/j.jma.2024.02.012

Yang Qin , Jia Hu , Zimeng Yang , Chao Han , Shiteng Long , Dingfei Zhang , Yu'an Chen , Fusheng Pan

{"title":"Constructing VO/V2O3 interface to enhance hydrogen storage performance of MgH2","authors":"Yang Qin , Jia Hu , Zimeng Yang , Chao Han , Shiteng Long , Dingfei Zhang , Yu'an Chen , Fusheng Pan","doi":"10.1016/j.jma.2024.02.012","DOIUrl":"10.1016/j.jma.2024.02.012","url":null,"abstract":"<div><div>In this study, MXene-derived V<sub>2</sub>O<sub>5</sub>@C nanosheets are successfully synthesized as an efficient catalyst for enhancing the hydrogen storage performance of MgH<sub>2</sub>. MgH<sub>2</sub>-V<sub>2</sub>O<sub>5</sub>@C exhibits exceptional kinetic and cyclic performance. It desorbs 3.59 wt.% H<sub>2</sub> within 120 min at 200 °C and adsorbs 3.9 wt.% H<sub>2</sub> within 2.7 h at room temperature after complete dehydrogenation. Moreover, even after 251 cycles at 300 °C, it maintains a hydrogen capacity of 5.45 wt.%, which accounted for 90.5% of the maximum hydrogen capacity. In addition, an activation mechanism for Mg hydrogenation driven by phase transition from V<sub>2</sub>O<sub>3</sub> to VO is firstly clarified through experimental and theoretical analysis. DFT calculations show that the hydrogenation energy barrier of VO (1.01 eV) is significantly lower than that of V<sub>2</sub>O<sub>3</sub> (1.82 eV). The phase transition from V<sub>2</sub>O<sub>3</sub> to VO forms abundant strong hydrogenation sites, effectively reducing the hydrogenation energy barrier of magnesium and activating the hydrogenation ability of deactivated magnesium. Therefore, benefited from the activation mechanism driven by the VO/V<sub>2</sub>O<sub>3</sub> interface, the hydrogen storage capacity of magnesium increased from 4.28 wt.% at 46th cycle to 5.45 wt.% at 251st cycle.</div></div>","PeriodicalId":16214,"journal":{"name":"Journal of Magnesium and Alloys","volume":"12 12","pages":"Pages 4877-4886"},"PeriodicalIF":15.8,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140139381","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0