Journal of Alloys and Compounds最新文献

{"title":"Polycarbosilane-derived Ti3SiC2 and its reaction mechanism","authors":"Leyao Xiong, Gaoming Mo, Ke Chen, Qing Huang","doi":"10.1016/j.jallcom.2025.178881","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.178881","url":null,"abstract":"Ti₃SiC₂ is a representative MAX phase that uniquely combines the merits of metals and ceramics. However, polymer-derived Ti₃SiC₂ has been less extensively studied, especially in terms of its reaction mechanism and structural evolution. In this study, Ti₃SiC₂ is synthesized by pressureless pyrolysis of PCS and TiH₂, the structural evolution and chemical reactions occurring during the organic-inorganic conversion and synthesis process are investigated. The results show that Ti₃SiC₂ with a mass fraction of 79.2 % can be achieved by pressureless pyrolysis of PCS and TiH₂ powders, with a Ti-to-Si atomic ratio of 3:1.7, at 1350 ℃. The presence of TiH₂ enhances the ceramic yield of PCS at 1000 ℃ compared to pure PCS, as some branched and crosslinking structures form between 100 ℃ and 300 ℃. By 800 ℃, the organic-inorganic conversion of PCS and the decomposition of TiH₂ are complete, resulting in the formation of amorphous SiC, free C and porous Ti. Concurrently, some SiC may transform into amorphous Si and C in the presence of porous Ti. At 1000 ℃, T₅Si₃ forms within the porous Ti matrix, while TiC is generated on the periphery. Between 1200℃ and 1350 ℃, a reaction between these two phases and free C leads to the synthesis of Ti₃SiC₂. The formed Ti₃SiC₂ phase begins to decompose at 1450 ℃ and completely breaks down into TiC, SiC, and TiSi₂ at 1600 ℃.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"24 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143056691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of B2O3/SiO2 ratio on photoluminescence properties and stability of red-emitting CsPb(Br/I)3 borosilicate quantum dots glass","authors":"Keyi Gu, Yongmin Duan, Shugang Li, Ying Tian, Juan Du, Junjie Zhang","doi":"10.1016/j.jallcom.2025.178925","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.178925","url":null,"abstract":"In recent years, inorganic perovskite quantum dots (PQDs) have garnered significant attention, but the photoluminescence (PL) properties and stability of red-emitting PQDs need to be further enhanced. In this work, the precipitation of CsPb(Br/I)₃ quantum dots into borosilicate glass was effectively enabled by the high-temperature melt-quenching method. With the B₂O₃/SiO₂ ratio increased, the glass network structure gradually loosened, which enhanced the precipitation of PQDs. Simultaneously, the PL intensity of CsPb(Br/I)₃ PQDs glass increased, with a near twentyfold rise in the photoluminescence quantum yield (PLQY). The variable temperature test of PQDs glass shows that PQDs glass has good thermal stability. Finally, a red-emitting LED and a WLED were prepared by using the prepared red-emitting CsPb(Br/I)₃ PQDs glass. This paper serves as a reference for incorporating red-emitting CsPb(Br/I)₃ PQDs glass into WLED development.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"36 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143057074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Highly efficient photo-supercapacitor based on Mg-doped NiOx/SnO2 p-n heterojunction","authors":"Ahmad Saraei, Ali Esfandiar, Nima Taghavinia","doi":"10.1016/j.jallcom.2025.178920","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.178920","url":null,"abstract":"A photo-supercapacitor is a device that captures and stores renewable solar energy. Metal oxide-based photo-supercapacitors with p-n junctions have attracted significant attention for application in self-powered electronic devices. In this study, we utilized a NiO_x/SnO₂ p-n heterojunction electrode to achieve a capacitance of 180 mF/cm² in a 1<!-- --> <!-- -->M aqueous KOH solution at a current density of 1<!-- --> <!-- -->mA/cm². The n-type layer was synthesized from SnO₂ nanostructures via a simple hydrothermal method on an FTO substrate, while the p-type layer was created by forming a NiO_x thin film through spin-coating. When exposed to visible light, Mg doping in the p-type layer enhanced the supercapacitor electrode performance. The capacitance, cathodic, and anodic current densities of the NiO_x/SnO₂ p-n heterojunction increased by 60%, 62%, and 65%, respectively, compared to the SnO₂ electrode. This approach presents a novel design and material composition for photo-supercapacitor fabrication, enabling the development of single-body structures with comparable performance to more complex configurations.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"7 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143057137","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of Cu content on HPT-induced grain boundary evolution, decomposition, segregation, and grain refinement in Al-xCu alloys","authors":"Man Feng, Shenbao Jin, Qinli Wu, Zhiping Wang, Xianghai An, Xiaozhou Liao, Jiehua Li, Gang Sha","doi":"10.1016/j.jallcom.2025.178930","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.178930","url":null,"abstract":"Grain boundaries (GBs) play a crucial role in determining the stability and mechanical properties of ultrafine-grained materials. This research investigates how alloy compositions impact GB evolution in Al-xCu alloys (x= 1, 2 and 4<!-- --> <!-- -->wt%) under high-pressure torsion (HPT), examining the interplay among precipitation, segregation, and grain refinement. HPT processing induces dynamic precipitation of Al₂Cu (θ) phase and occasionally the unexpected formation of the AlCu (η₂) phase, while generating high-volume-fraction GBs and high-density dislocations with Cu segregation. Notably, GB misorientation angle evolves differently across the alloys with increasing HPT strain, in contrast to relatively stable GB segregation behavior. The study finds a strong correlation between reduced dislocation density and increased high-angle GBs (HAGBs), suggesting that dislocation annihilation at GBs facilitates the transformation of low-angle GBs into HAGBs during HPT processing. These findings demonstrate the potential to engineer GB characteristics in ultrafine-grained Al-Cu alloys by optimizing alloy composition and HPT processing parameters.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"11 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143057073","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Microscopic Crack propagation mechanism and Fatigue Crack Growth Behavior of Ti-5321 Alloy Formed by Laser Cladding","authors":"Guozheng Liu, Qinyang Zhao, Weiju Jia, Yan Zhang, Shuo Song, Chengliang Mao, Wei Zhou, Siyuan Zhang, Yongqing Zhao","doi":"10.1016/j.jallcom.2025.178937","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.178937","url":null,"abstract":"To satisfy the need for rapid production of high damage tolerance titanium alloys in the aerospace industry, Ti-5321 alloy was manufactured using laser cladding. Single annealing and BASCA (β annealed, slow cooled, and aged) of the Ti-5321 alloy produced two distinct microstructures: basket-weave structure and large layer structure. Their influence on fatigue crack propagation was investigated. The results indicate that: basket-weave structure, comprised of elongated lamellar α, exhibits excellent plasticity and toughness. There was significant orientation difference between adjacent lamellar α, and multiple slip may occur during the slip process. The microscopic fracture propagation pattern of basket-weave structure resembled a \"sawtooth\", signifying a high resistance to crack propagation and a robust capacity to inhibit propagation. Large layer structure consisted of large lamellar α on a scale of 10~30 μm and ultrafine needle-like α. It possesses an exceptionally high ultimate tensile strength of 1300<!-- --> <!-- -->MPa and a low toughness of 46.0<!-- --> <!-- -->MPa·m^1/2. The orientation difference between adjacent α/β was minimal and susceptible to single pyramidal {10-11}&lt;1-210&gt; slip. The microscopic crack propagation pattern of large layer structure resembled little \"steps\". These factors have resulted in diminished crack propagation resistance.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"74 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143057077","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of irradiation with varying H/He ratio on defect clusters and hardening in CLAM steel","authors":"Zepeng Yin, Liping Guo, Yiheng Chen, Ziyang Xie, Wenbing Lin, Junjie Cao, Yunxiang Long, Hongtai Luo, Rui Yan","doi":"10.1016/j.jallcom.2025.178935","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.178935","url":null,"abstract":"High energy neutron irradiation in fusion reactors compared to fission reactors necessitates more attention to the effects of hydrogen (H) and helium (He) generated by transmutation on structural materials. Due to the intricate synergistic effect between H and He, the experimental results have not exhibited satisfactory consistency and, sometimes were contradictory. Via summarizing the previous results, it is suggested that the mechanism of the H-He synergistic effect is highly correlated with the H/He ratios. Based on this perspective, multi-beam ion irradiation experiments with four distinct H/He ratios were implemented on China Low Activation Martensitic (CLAM) steel, a candidate structural material for fusion reactors. The results showed that a low H/He ratio contributed to the dispersion of cluster nucleation, resulting in high-density small dislocation loops, whereas a high H/He ratio promoted the growth of defect clusters. Irradiation-induced hardening was observed to increase at low H concentrations and decrease at high H concentrations. The present study proposed that the H-He synergistic effect can be viewed from the perspective of the formation of H₂ molecules. The disparate responses of materials to the H-He synergistic effect may originate from the different H critical concentrations for the formation of H₂ molecules. This critical concentration should be determined by the factors such as material composition and irradiation conditions.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"130 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143057136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A study on the preparation, antimicrobial property and durability of Ag-based coating deposited by electric spark discharge with silver nitrate solution","authors":"Jinbao Guo, Jiangwen Liu, Yikang Feng, Junfeng Gou, Aiyi Chen, Guie Xie","doi":"10.1016/j.jallcom.2025.178798","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.178798","url":null,"abstract":"With the increased use of antimicrobial drugs, the threat of antimicrobial resistance is becoming a thorny problem. Preparing silver (Ag) based coatings with a certain antimicrobial property on the implants has emerged as an alternative strategy to reduce the use of antibiotics. However, how to prepare antimicrobial Ag-based coatings with good durability simply and efficiently is still an urgent problem to be resolved. In this research, a novel preparation method of Ag-based coating using traditional electrical spark discharge (ESD) deposition technique was proposed. Silver nitrate solution instead of traditional ESD working media and a flexible titanium brush electrode instead of silver brush electrode were used to prepare the Ag-based coating. Besides, a micro-column array structure was fabricated on the substrate to improve the antimicrobial efficacy and durability of the coating. The experimental results showed that a relatively complete Ag-based coating was prepared successfully on the micro-column textured surface of titanium alloy substrate. Antimicrobial tests showed that the antimicrobial efficacy of the coating sample with micro-column array against Staphylococcus aureus (S. aureus) and Escherichia coli (E. coil) increased by more than 95 %. The ultrasonic vibration tests and wear tests confirmed that the coating sample with micro-column array possessed good adhesion ability and durability. The deposition of Ag in the coating can be attributed to the decomposition of AgNO₃ during the electrical spark discharge process.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"60 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143056690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Novel Two-step Electrochemical Method for the Complete Filling of Cu2O into TiO2 Nanotube Arrays as an Anti-fouling Surface for Titanium","authors":"Jianfeng Lan, Xianhui Zhang, Jiangfan Chang, Bo Wu, Baiyi Chen, Jianhua Wu","doi":"10.1016/j.jallcom.2025.178931","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.178931","url":null,"abstract":"Titanium, often referred as the “metal of the ocean”, shows substantial promise for marine engineering applications. However, its widespread use remains constrained by the persistent challenge of biofouling in the marine environment, underscoring the critical need for effective anti-fouling strategies tailored for titanium.This paper develops a novel anti-fouling titanium surface, prepared through a straightforward two-step electrochemical method that completely fills the anti-fouling agent Cu₂O into TiO₂ nanotube arrays on the titanium surface. The method achieves the complete filling of Cu₂O into TiO₂ nanotube arrays by selectively enhancing the bottom conductivity of TiO₂ nanotube arrays and the optimized pulse deposition parameters. Anti-fouling performance evaluations demonstrate that this novel anti-fouling titanium surface exhibits excellent anti-adhesion properties against marine fouling organisms, including bacteria, diatoms, and barnacles. Furthermore, it maintains significant anti-fouling efficacy for nearly one month in the marine environment. The design and fabrication process of this novel anti-fouling titanium surface proposed in this paper provides a promising strategy for the application of titanium in the marine environment.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"25 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143057075","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"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 the corrosion behavior of extruded Mg-4.2Y-2.2Nd-1Gd-0.6Zr alloy modified by heat treatment: A combination of experiment and first-principles calculation","authors":"Haiyang Jiang, Xiang Chen, Junlei Zhang, Zulai Li, Quan Shan, Dawei Wang, Lifei Wang","doi":"10.1016/j.jallcom.2025.178903","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.178903","url":null,"abstract":"This study explored the relationship between the microstructure and corrosion behavior of Mg-4.2Y-2.2Nd-1Gd-0.6Zr alloy in different states (As-extrusion (T1), aging after extrusion (T5), and solution-aging after extrusion (T6)) using experimental methods and first-principles calculations. The results showed that fine grains and precipitates promoted uniform corrosion and formed a dense corrosion product film. Conversely, larger grains and chain-distributed block precipitates caused severe localized corrosion. The heat treatment-induced changes in alloy texture characteristics did not significantly affect the average surface energy, indicating that the current variations in texture had minimal effect on corrosion resistance.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"45 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-01-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143057076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Construction of Cu2O/PANI-GO/SS flexible electrode with three-dimensional network structure towards electrochemical sensing of glucose and ascorbic acid","authors":"Haoran Li, Yuekuan Sun, Ting Xian, Jinhun Bao, Wenjuan Liu, Xiaolong Lu","doi":"10.1016/j.jallcom.2025.178919","DOIUrl":"https://doi.org/10.1016/j.jallcom.2025.178919","url":null,"abstract":"Three-dimensional (3D) nanostructures which have the ability to expand carrier diffusion channels and provide plenty of electrocatalytic active sites are extensively regarded as highly effective strategies for enhancing the sensing performance of electrocatalysts. Herein, a highly sensitive Cu₂O/PANI-GO electrode was constructed simply via in-situ electrodeposition of the graphene oxide (GO) doped polyaniline PANI (PANI-GO) 3D porous network structure on a flexible stainless-steel (SS) foil substrate. Subsequently, Cu₂O nanoparticles were electrodeposited onto the unique 3D network architecture which provides abundant active sites for Cu₂O deposition. Meanwhile, the introduction of conductive PANI and GO improves the conductivity of the sensing catalysts and enhances the electrocatalytic performance of Cu₂O. The electrochemical behavior of glucose and ascorbic acid (AA) was investigated through cyclic voltammetry (CV). CV results have demonstrated that the formation of a 3D porous network structure provides a substantial number of electronic pathways, which facilitate direct electron transfer between biomolecules and electrocatalysts, thereby promoting the electrocatalytic oxidation of glucose and ascorbic acid (AA). According to chronoamperometry, such a 3D porous network structure electrode exhibits outstanding sensing performance for glucose and AA detection, including lower detection limit and higher sensitivity over a wide detection range compared with the reported similar Cu₂O-based electrodes. The excellent anti-interference, stability, reproducibility, and bending stability are also obtained. Furthermore, the glucose concentration in diluted fetal bovine serum and AA concentration in diluted vitamin c beverages were quantitatively measured, and the results were satisfactory, indicating that the proposed flexible electrochemical sensing electrode provides considerable prospects for practical human health and food safety monitoring.","PeriodicalId":344,"journal":{"name":"Journal of Alloys and Compounds","volume":"127 25 1","pages":""},"PeriodicalIF":6.2,"publicationDate":"2025-01-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143057140","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}