Rare Metals最新文献

{"title":"Ordered mesoporous carbon-supported iron vanadate anode for fast-charging, high energy density, and stable lithium-ion batteries","authors":"Yi-Fan Li,&nbsp;Jing-Hui Ren,&nbsp;Qiu-Qi Wu,&nbsp;Qian Wang,&nbsp;Wen-Jun Cao,&nbsp;Xu-Da Guo,&nbsp;Shu-Guo Lei,&nbsp;Yi Zhang,&nbsp;Shan Jiang,&nbsp;Lei-Chao Meng,&nbsp;Ji-Wei Hou","doi":"10.1007/s12598-024-03044-6","DOIUrl":"10.1007/s12598-024-03044-6","url":null,"abstract":"<div><p>Developing fast-charging lithium-ion batteries (LIBs) that feature high energy density is critical for the scalable application of electric vehicles. Iron vanadate (FVO) holds great potential as anode material in fast-charging LIBs because of its high theoretical specific capacity and the high natural abundance of its constituents. However, the capacity of FVO rapidly decays due to its low electrical conductivity. Herein, uniform FVO nanoparticles are grown in situ on ordered mesoporous carbon (CMK-3) support, forming a highly electrically conductive porous network, FVO/CMK-3. The structure of CMK-3 helps prevent agglomeration of FVO particles. The electrically conductive nature of CMK-3 can further enhance the electrical conductivity of FVO/CMK-3 and buffer the volume expansion of FVO particles during cycling processes. As a result, the FVO/CMK-3 displays excellent fast-charging performance of 364.6 mAh·g⁻¹ capacity for 2500 cycles at 10 A·g⁻¹ (with an ultralow average capacity loss per cycle of 0.003%) through a pseudocapacitive-dominant process. Moreover, the LiCoO₂//FVO/CMK-3 full cell achieves a high capacity of 100.2 mAh·g⁻¹ and a high capacity retention (96.2%) after 200 cycles. The superior electrochemical performance demonstrates that FVO/CMK-3 is an ideal anode material candidate for fast-charging, stable LIBs with high energy density.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 3","pages":"1605 - 1616"},"PeriodicalIF":9.6,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667889","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}

{"title":"Damage mechanisms of a metastable β-titanium alloy with bimodal microstructure revealed by void growth models using synchrotron X-ray microtomography","authors":"Bin Gu,&nbsp;Jérôme Adrien,&nbsp;Eric Maire,&nbsp;Ning Dang,&nbsp;Werner Skrotzki","doi":"10.1007/s12598-024-03029-5","DOIUrl":"10.1007/s12598-024-03029-5","url":null,"abstract":"<div><p>In order to investigate the damage tolerance of a metastable Ti-5Al-3V-3Mo-2Cr-2Zr-1Nb-1Fe (Ti5321) alloy with bimodal microstructure using void growth quantification and micromechanical modeling, in situ tensile testing was performed during X-ray microtomography experiments. Compared with investigations of surface voids by traditional two-dimensional (2D) methods involving post-mortem characterization, three-dimensional (3D) information on void evolution inside optically opaque samples obtained through X-ray microtomography is essential. The Rice and Tracey model and Huang model were applied to predict void growth and show good agreement with experimental data using calibration of the damage parameter <i>α</i>. The void growth kinetics of Ti5321 with bimodal microstructure was analyzed by comparing the <i>α</i> value with that of Ti64 for different microstructure morphologies. The damage mechanism of ductile fracture of Ti5321 with bimodal microstructure is discussed. It was found that the size of the voids apparently increases with the triaxiality of stress. Post-mortem scanning electron microscopy (SEM) was also used to demonstrate this damage mechanism of ductile fracture of Ti5321.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 3","pages":"1972 - 1981"},"PeriodicalIF":9.6,"publicationDate":"2024-11-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668014","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}

{"title":"Enabling highly concentrated tetracycline degradation with tailored FeCo nanocrystals in porous graphitic carbon fiber","authors":"Fu Yang,&nbsp;Shi-Qi Yang,&nbsp;Xiu Zhong,&nbsp;Hong-Yao Zhao,&nbsp;Meng-Ting Liu,&nbsp;Yan-Yun Wang,&nbsp;Chao Yu,&nbsp;Xin-Wei Zhou,&nbsp;Dan-Hong Shang,&nbsp;Qian Wang,&nbsp;Yi-Yan Song,&nbsp;Edison Huixiang Ang","doi":"10.1007/s12598-024-03021-z","DOIUrl":"10.1007/s12598-024-03021-z","url":null,"abstract":"<div><p>Eliminating highly concentrated antibiotic wastewater by transition metal catalyst-assisted AOPs is challenging. Herein, by varying the metal precursor composition (Co/Fe ratios of 1/1, 1.5/2/3), alloyed Co₇Fe₃ nanocrystals or spinel-like CoFe₂O₄ can be switched and both confined within the porous N-doped graphitic carbon fibers by electrospinning and controlled graphitization. Impressively, iron precursors played a dual role in working as reactive centers and main activators for the creation of porous carbon networks affording improved accessibility to catalytic sites and easy tetracycline (TC) diffusion effect. The catalytic activity of the resulting materials was closely related to surface metal valence and composition. Notably, the CoFe₂O₄ exhibited a significant improvement in peroxymonosulfate (PMS) adsorption and activation, explained by the present electron-deficient Co and Fe synergetic sites together with the interesting Jahn–Teller effect. Fe₁Co₂/CNF demonstrated the highest efficiency in degrading TC, achieving a reaction rate constant of 0.4647 min⁻¹ with a low activation energy of 9.3 kJ·mol⁻¹, nearly a 7.5-fold enhancement compared to Fe₁Co₃/CNF (0.062 min⁻¹). The reaction mechanism and the role of reactive oxidative species revealed a synergy of ·SO₄⁻, ·OH, ·O₂⁻ and ¹O₂. Wherein, ·O₂⁻ plays a more dominant role in the degradation of TC than other reactive species. Additionally, a reinforced electron-transfer pathway in the Fe₁Co₂/CNF system during PMS interaction was demonstrated. Furthermore, the degradation routes of TC were unraveled, and the toxicity of various intermediate by-products was assessed. Importantly, our continuous flow-type TC degradation process and light-driven photothermal strengthened reaction process demonstrated consistent performance, thereby offering a promising approach for tackling highly concentrated antibiotic wastewater.</p><h3>Graphic abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 3","pages":"1869 - 1882"},"PeriodicalIF":9.6,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668251","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}

{"title":"Perylenetetracarboxylic diimide functionalized CsPbCl3:Mn2+ as multifunctional spectral conversion nanomaterials for efficient and stable perovskite solar cells","authors":"Ya-Li Jin,&nbsp;Xin-Xuan Yang,&nbsp;Hui Duan,&nbsp;Lin Fan,&nbsp;Mao-Bin Wei,&nbsp;Hui-Lian Liu,&nbsp;Xiao-Yan Liu,&nbsp;Jing-Hai Yang,&nbsp;Feng-You Wang,&nbsp;Li-Li Yang","doi":"10.1007/s12598-024-03046-4","DOIUrl":"10.1007/s12598-024-03046-4","url":null,"abstract":"<div><p>Enhancing the photovoltaic performance of perovskite solar cells (PSCs) via the strategy of spectral conversion garners significant attention in recent years. However, developing a spectral conversion layer with excellent stability and low series resistance remains challenging. Here, we propose a spectral conversion material termed perylenetetracarboxylic diimide functionalized CsPbCl₃:Mn²⁺ quantum dots (CMI), which is incorporated at the SnO₂/perovskite interface as a down-conversion layer. This innovation effectively resolves the trade-off between spectral conversion efficiency and electrical performance of the spectral conversion layer. CMI converts ultraviolet light into visible light that is more readily absorbed by the perovskite, thus enhancing the light utilization and reducing the ultraviolet-induced degradation of perovskites. The rough and hydrophobic surface of CMI can modulate nucleation site arrangement and enhance grain boundary mobility, resulting in perovskite films with larger and denser grains. Furthermore, the C=O groups in CMI simultaneously passivate the oxygen vacancies in SnO₂ and the Pb²⁺ dangling bonds at the buried interface of the perovskite, reducing recombination losses and facilitating charge carrier transfer and extraction, and further enhancing power conversion efficiency (PCE). Consequently, the PSCs incorporating CMI as a down-conversion layer achieve an improved PCE, which rises from 21.26% to 23.61%, along with enhanced stability.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 3","pages":"1730 - 1741"},"PeriodicalIF":9.6,"publicationDate":"2024-11-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668250","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}

{"title":"Multi-scale inhomogeneity and anomalous mechanical response of nanoscale metallic glass pillar by cryogenic thermal cycling","authors":"Xiao Liu,&nbsp;Si-Yi Di,&nbsp;Jing Zhou,&nbsp;Fang Miao,&nbsp;Hong-Ze Wang,&nbsp;Yi Wu,&nbsp;Hao-Wei Wang,&nbsp;Hai-Bo Ke,&nbsp;Qiang Li","doi":"10.1007/s12598-024-02964-7","DOIUrl":"10.1007/s12598-024-02964-7","url":null,"abstract":"<p>The mechanical responses and structure variations of Ta₈₀Co₂₀ nanoscale metallic glass (MG) film samples upon cryogenic thermal cycling (CTC) treatment were studied. The simultaneous improvements of strength and deformation ability bring about a super-high strength of 4.5 GPa and a large plastic strain of about 80% after CTC treatment. The significant increase in inter-element bonding and hardness makes the activation and percolation of shear transformation zones to be more difficult and delays the yielding event, leading to the ultra-high strength. Although the TaCo MG pillar reaches a relaxation energy state, the micro- and nanoscale inhomogeneities remain induced by the local densely packed units along with crystal-like ordering embedded in the matrix. The multi-scale inhomogeneity can effectively hinder the sliding of the shear bands and improve their propagation stability, which is considered to be the origin of its excellent plasticity. Our study reveals another prospect of CTC treatment on nanoscale MG samples of constructing an anomalous inhomogeneous structure and obtaining simultaneous enhancement of strength and plasticity.</p>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"43 12","pages":"6771 - 6780"},"PeriodicalIF":9.6,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s12598-024-02964-7.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142737194","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}

{"title":"Real-time electrochemical monitoring sensor for pollutant degradation through galvanic cell system","authors":"Wu-Xiang Zhang,&nbsp;Zi-Han Li,&nbsp;Rong-Sheng Xiao,&nbsp;Xin-Gang Wang,&nbsp;Hong-Liang Dai,&nbsp;Sheng Tang,&nbsp;Jian-Zhong Zheng,&nbsp;Ming Yang,&nbsp;Sai-Sai Yuan","doi":"10.1007/s12598-024-03050-8","DOIUrl":"10.1007/s12598-024-03050-8","url":null,"abstract":"<div><p>Here, a novel real-time monitoring sensor that integrates the oxidation of peroxymonosulfate (PMS) and the in situ monitoring of the pollutant degradation process is proposed. Briefly, FeCo@carbon fiber (FeCo@CF) was utilized as the anode electrode, while graphite rods served as the cathode electrode in assembling the galvanic cell. The FeCo@CF electrode exhibited rapid reactivity with PMS, generating reactive oxygen species that efficiently degrade organic pollutants. The degradation experiments indicate that complete bisphenol A (BPA) degradation was achieved within 10 min under optimal conditions. The real-time electrochemical signal was measured in time during the catalytic reaction, and a linear relationship between BPA concentration and the real-time charge (<i>Q</i>) was confirmed by the equation ln(<i>C</i>₀/<i>C</i>) = 4.393<i>Q</i> (correlation coefficients, <i>R</i>² = 0.998). Furthermore, experiments conducted with aureomycin and tetracycline further validated the effectiveness of the monitoring sensor. First-principles investigation confirmed the superior adsorption energy and improved electron transfer in FeCo@CF. The integration of pollutant degradation with in situ monitoring of catalytic reactions offers promising prospects for expanding the scope of the monitoring of catalytic processes and making significant contributions to environmental purification.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 3","pages":"1800 - 1812"},"PeriodicalIF":9.6,"publicationDate":"2024-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668112","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}

{"title":"Black phosphorus nanodots-modified Pt/C electrocatalyst for methanol-tolerant oxygen reduction in direct methanol fuel cells","authors":"Li-Li Zhang,&nbsp;Pan-Pan Lu,&nbsp;Ming-Ming Yin,&nbsp;Ruo-Nan Li,&nbsp;Bing Wang,&nbsp;Xian-Di Ma,&nbsp;Meng-Gai Jiao,&nbsp;Wei Ma,&nbsp;Zhen Zhou","doi":"10.1007/s12598-024-03039-3","DOIUrl":"10.1007/s12598-024-03039-3","url":null,"abstract":"<div><p>Designing advanced electrocatalysts with high methanol tolerance in the oxygen reduction reaction process is crucial for the sustainable implementation of direct methanol fuel cells. Herein, we present a Pt/C catalyst modified with black phosphorus (BP) nanodots (BPNDs-Pt/C) by using a facile ultrasonic mixing method. Experimental and computational investigations reveal that the electron transfer from BP to Pt leads to weak adsorption of hydroxyl groups on the Pt surface. As a result, the BPNDs-Pt/C catalyst exhibits efficient activity and anti-methanol ability for cathodic oxygen reduction electrocatalysis in an acidic medium. Additionally, it demonstrates high activity for oxygen reduction reaction (ORR) in an alternative alkaline system with cation exchange membrane and eliminable methanol penetration. This work highlights the feasibility of using non-metallic elements to regulate the electronic structure and surface properties of Pt-based nanomaterials. Furthermore, the designed BPNDs-Pt/C electrocatalyst, with controllable ORR performance, can be applied across various scenarios based on demand.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 3","pages":"1767 - 1776"},"PeriodicalIF":9.6,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668239","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}

{"title":"Preparation and electrocatalytic performance of novel-integrated Ni-Mo sulfide electrode materials for water splitting","authors":"Shan-Shan Li,&nbsp;Qing-He Yu,&nbsp;Jing Mi,&nbsp;Lei Hao,&nbsp;Li-Jun Jiang,&nbsp;Shu-Xian Zhuang","doi":"10.1007/s12598-024-03031-x","DOIUrl":"10.1007/s12598-024-03031-x","url":null,"abstract":"<div><p>Advanced electrode materials for electrocatalysis of electrolytic decomposition are crucial materials in the field of hydrogen production from renewable energy. In this work, a new type of integrated hydrogen evolution electrode material was synthesized by selective acidification etching and in situ growth technology. A novel-integrated Ni-Mo sulfide electrode material with a three-dimensional network structure was successfully prepared using a two-step method (convenient surface modification and in situ growth techniques), which involved surface modification at 30% HNO₃ for 10 min and followed by annealing treatment at 600 °C for 1 h with 10 °C·min⁻¹ heating rate. The structure displayed an electrochemical active surface area (ECSA) of 30.125 mF·cm⁻², calculated on 0.10–0.30 V (vs. RHE) CV curves with a 5–50 mV·s⁻¹ sweep rate range. The ECSA of other samples was also tested by aforementioned methods, which had great distinction on ECSA with different samples. The novel-integrated Ni-Mo sulfide electrode material appeared to have extremity electrochemical performance in a three-electrode configuration employing 1 M KOH solution as an electrolyte, including an excellent hydrogen evolution overpotential of 346 mV at the current density of 500 mA·cm⁻², superior Tafel slope with 103 mV·dec⁻¹. Such outstanding electrochemical performances of the novel-integrated Ni-Mo sulfide electrode materials were directly related to the distinctive integrated structure. Therefore, it was facility to find that the successful preparation of novel-integrated Ni-Mo sulfide electrode material provided more selection opportunities for alkaline electrolysis of water and offered an innovative mentality for the preparation of other types of electrode materials.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"43 12","pages":"6384 - 6393"},"PeriodicalIF":9.6,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142737061","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}

{"title":"Revealing role of oxidation in recycling spent lithium iron phosphate through acid leaching","authors":"Dan-Feng Wang,&nbsp;Min Chen,&nbsp;Jing-Jing Zhao,&nbsp;Feng-Yin Zhou,&nbsp;Hong-Ya Wang,&nbsp;Xin Qu,&nbsp;Yu-Qi Cai,&nbsp;Zhi-Yu Zheng,&nbsp;Di-Hua Wang,&nbsp;Hua-Yi Yin","doi":"10.1007/s12598-024-03007-x","DOIUrl":"10.1007/s12598-024-03007-x","url":null,"abstract":"<div><p>The efficient recycling of spent lithium iron phosphate (LiFePO₄, also referred to as LFP) should convert Fe (II) to Fe (III), which is key to the extraction of Li and separation of Fe and is not well understood. Herein, we systematically study the oxidation of LiFePO₄ in the air and in the solution containing oxidants such as H₂O₂ and the effect of oxidation on the leaching behaviors of LFP. In the air, O₂ breaks down the LFP olivine structure at 550 °C for 1 h by oxidizing Fe (II) to Fe (III) in terms of converting LFP to Li₃Fe₂(PO₄)₃ and Fe₂O₃. After that, Li is leached in 0.5 M sulfuric acid solution and is further recycled as Li₃PO₄ with a Li recovery efficiency of 97.48%. Meanwhile, Fe is recovered as FePO₄ and Fe₂O₃. Compared with H₂SO₄–H₂O₂, the air oxidation saves H₂O₂ but increases the leaching efficiency of Fe and H₂SO₄ consumption. The discrepancy of Fe leaching efficiency can be attributed to the different leaching mechanisms involving the solid-to-solid and solid-to-liquid-to-solid conversions. Furthermore, the results of the Everbatt model analysis show that the air roasting-H₂SO₄ leaching method has low emission and potentially high income, which is simple and safe. Overall, this work will deepen the understanding of acid leaching of LFP and favorably stimulate the maturation of the LFP recycling technique.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 3","pages":"2059 - 2070"},"PeriodicalIF":9.6,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668240","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}

{"title":"Suppression of discontinuous precipitation by Fe addition in Cu–Ti alloys","authors":"Xu Wang,&nbsp;Zhu Xiao,&nbsp;Yu Chen,&nbsp;Zhou Li","doi":"10.1007/s12598-024-03016-w","DOIUrl":"10.1007/s12598-024-03016-w","url":null,"abstract":"<div><p>Cu–Ti alloys are a kind of elastic copper alloys with excellent comprehensive properties. They are often used in electronic and electrical fields. However, discontinuous precipitation may occur during the preparation process of Cu–Ti alloys, and they can lead to the significant deterioration of mechanical properties. To solve this problem, three Cu–Ti alloys with various Fe contents (Cu–2.7Ti, Cu–2.7Ti–0.1Fe and Cu–2.7Ti–0.2Fe) were designed and prepared in this paper to investigate the effects of Fe on the discontinuous precipitation. The results showed that after aging at any given aging time and temperature, the area fraction of cellular structure decreased with the increase of Fe content. The addition of Fe into Cu–Ti alloys resulted in Fe doping in β'–Cu₄Ti phase and β–Cu₄Ti phase. For 450 °C/144 h-aged Cu–2.7Ti–0.2Fe alloy, the Fe content in β'–Cu₄Ti phase and β–Cu₄Ti phase was 1.59 at% and 0.90 at%, respectively. The tensile tests showed that under the same aging treatment conditions, Cu–2.7Ti–0.2Fe alloy possessed better mechanical properties. First-principles calculation confirmed that the thermodynamic stability of β'–Cu₄Ti phase was enhanced by decreasing its cohesive energy through Fe doping. At the same time, the enthalpy of formation of β–Cu₄Ti phase was generally increased by Fe doping, making it difficult to generate. In short, Fe addition in Cu–Ti alloys suppressed discontinuous precipitation by Fe doping in the precipitates and helped to improve mechanical properties.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":"44 3","pages":"1982 - 1997"},"PeriodicalIF":9.6,"publicationDate":"2024-11-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143668236","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}