Materials Chemistry and Physics最新文献_第7页

Structure-property correlation for friction stir welded joints of 2219Al alloys microalloyed with Cd 镉微合金化 2219Al 合金搅拌摩擦焊接接头的结构-性能相关性

IF 4.3 3区材料科学

Materials Chemistry and Physics Pub Date : 2024-10-16 DOI: 10.1016/j.matchemphys.2024.130051

{"title":"Structure-property correlation for friction stir welded joints of 2219Al alloys microalloyed with Cd","authors":"","doi":"10.1016/j.matchemphys.2024.130051","DOIUrl":"10.1016/j.matchemphys.2024.130051","url":null,"abstract":"<div><div>Present study aimed at experimental investigation of microstructural evolution, microhardness profile, tensile and impact properties of friction stir welded (FSW) joints of 2219Al alloys microalloyed with varying (up to 0.1 wt%) Cd contents. FSW was performed on the cast and homogenized alloys. Microstructural analysis from weld line up to base metal, identified three sequential heat affected weld zones having separate grain morphologies, namely Weld Nugget Zone (<em>WNZ</em>), Thermo-Mechanical Affected Zone (<em>TMAZ</em>) and Heat Affected Zone (<em>HAZ</em>). Vickers microhardness value increased from weld line towards the <em>WNZ</em>, then decreased towards the <em>TMAZ</em>, and finally increased through <em>HAZ</em> towards the base metal, which exhibited higher hardness compared to all the heat affected weld zones. Microhardness, yield and tensile strengths of the FSW joint of 2219Al alloy increased, due to microalloying with 0.06 wt% of Cd contents, which was attributed to continuous grain refinement. While tensile ductility and toughness, and impact toughness of the welded joint reduced, resulting from trace additions of Cd. Investigated alloys retained significant mechanical strength, ductility and toughness, on the respective joints, following to the FSW operation. Cd was observed to be a potential microalloying element to control the microstructure, refine grain size and improve mechanical strength and hardness of the welded joint of 2219Al alloy. Present experimental results established a structure-property correlation, in order to validate potential application of FSW technique on investigated 2219Al alloys with trace additions of Cd, to attain desirable weld-quality avoiding welding imperfections.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142533583","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microstructure, MAO performance, interfacial characteristics and corrosion behavior of FSW joint of Al–Mg-Sc alloy Al-Mg-Sc 合金 FSW 接头的微观结构、MAO 性能、界面特性和腐蚀行为

IF 4.3 3区材料科学

Materials Chemistry and Physics Pub Date : 2024-10-15 DOI: 10.1016/j.matchemphys.2024.130046

{"title":"Microstructure, MAO performance, interfacial characteristics and corrosion behavior of FSW joint of Al–Mg-Sc alloy","authors":"","doi":"10.1016/j.matchemphys.2024.130046","DOIUrl":"10.1016/j.matchemphys.2024.130046","url":null,"abstract":"<div><div>The microstructure evolution, micro-arc oxidation (MAO) performance, and corrosion behavior of Al–Mg-Sc alloy friction stir welded (FSW) joint were investigated. The microstructure observations indicated that compared with the base metal (BM), the stirring zone (SZ) and thermo-mechanical affected zone (TMAZ) showed notable grain defects and an enormous number of high angle grain boundaries (HAGBs). Additionally, a more conspicuous presence of non-uniform recrystallized grains and HAGBs was noticed in the thickness direction within the SZ. FSW process induced the precipitation of Al<sub>3</sub>Mg<sub>2</sub> (β phase) at grain boundaries in the heat-affected zone (HAZ) of joint. The microstructural changes and precipitation induced by the FSW process influenced the electrical conductivity, resulting in the differences in micro-arc discharge in various zones of the FSW joint in MAO process, which in turn affected the thickness, porosity, and corrosion resistance of MAO ceramic film. HRTEM observation suggested that a transition layer composed of nanocrystalline and amorphous Al<sub>2</sub>O<sub>3</sub> with average thickness of 2–4 nm was found at the film/substrate interface. Electrochemical tests suggested that a heterogeneous structure in various regions of FSW joint resulted in varying susceptibility to localized corrosion. HAZ/TMAZ had the worst anti-corrosion performance. After MAO treatment, the anti-corrosion performance of SZ and HAZ/TMAZ in FSW joint was significantly improved, especially SZ.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142444636","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Enhanced physical, electrical, and structural properties of chitosan thin films doped with Ag@ZnO nanoparticles for energy storage applications 增强掺杂 Ag@ZnO 纳米粒子的壳聚糖薄膜的物理、电气和结构特性，用于储能应用

IF 4.3 3区材料科学

Materials Chemistry and Physics Pub Date : 2024-10-15 DOI: 10.1016/j.matchemphys.2024.130003

引用次数: 0

Supercapacitor devices based on multiphase MgTiO3 perovskites doped with Mn2+ ions 基于掺杂 Mn2+ 离子的多相 MgTiO3 包晶的超级电容器设备

IF 4.3 3区材料科学

Materials Chemistry and Physics Pub Date : 2024-10-15 DOI: 10.1016/j.matchemphys.2024.130016

{"title":"Supercapacitor devices based on multiphase MgTiO3 perovskites doped with Mn2+ ions","authors":"","doi":"10.1016/j.matchemphys.2024.130016","DOIUrl":"10.1016/j.matchemphys.2024.130016","url":null,"abstract":"<div><div>Recently, perovskites have become a hotspot for researchers attempting to exploit metal and oxygen vacancies in structures of the form MTiO<sub>3</sub>, facilitating the convenient electron/hole migration, thus displaying interesting properties. Magnesium Titanate (MgTiO<sub>3</sub>) is a prominent part of the perovskite class, exhibiting remarkable electrical, thermal, and chemical properties. Undoped and Mn-doped MgTiO<sub>3</sub> samples were obtained using a solid-state reaction starting from previously synthesized MgO and TiO<sub>2</sub> powders, which were separately doped with different Mn ion concentrations. The resulting multiphase materials with a major MgTiO<sub>3</sub> phase were thoroughly morpho-structurally analyzed employing XRD, STEM, Raman, PL, XPS, and EPR spectroscopy. The electrochemical results indicate that they show superior performance when used as electrode materials for supercapacitor application due to the high defect concentration as shown in EPR and PL spectroscopy and the ferroelectric behavior observed in XPS and XRD. When used in symmetric and asymmetric supercapacitor devices, they show promising results, with specific capacity values reaching up to 109 F/g for the symmetric and 609 F/g for the asymmetric devices, while energy and power density values reached 84.7 Wh/kg and 90.8 kW/kg respectively, proving a great potential in the energy storage field.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142533579","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"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

Characterization of three-dimensional printed hydroxyapatite/collagen composite slurry 三维印刷羟基磷灰石/胶原蛋白复合浆料的表征

IF 4.3 3区材料科学

Materials Chemistry and Physics Pub Date : 2024-10-15 DOI: 10.1016/j.matchemphys.2024.130047

{"title":"Characterization of three-dimensional printed hydroxyapatite/collagen composite slurry","authors":"","doi":"10.1016/j.matchemphys.2024.130047","DOIUrl":"10.1016/j.matchemphys.2024.130047","url":null,"abstract":"<div><div>Nowadays, biomaterial composites for bone tissue engineering are developing rapidly. Many research studies have been done on hydroxyapatite (HA) and collagen because these materials are biomimetic and can be used in human bones. This study aimed to characterize a three-dimensional (3D) printed hydroxyapatite/collagen composite slurry material with a ratio of 99.84 % (w/v) and 0.16 % (w/v). The composite material was printed using 3D printing with a print speed of 10 mm/min and a layer height of 0.5 mm. Characterization layers were investigated using a scanning electron microscope (SEM), Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), energy dispersive X-ray (EDX), and thermogravimetric analysis (TGA). SEM showed the occurrence of overlapping between layers, which was investigated by the reduction in layer dimensions after printing (layer size 432 μm). Moreover, there were no boundaries between layers; the connection between layers occurred, and porosity and the rough surface were presented. FTIR analyses showed spectrum peaks at 559.36, 628.79, 1022.27, 1562.34, and 1639.49 cm<sup>−1</sup> which was confirmed as hydroxyapatite and amide (indicates the presence of spectrum collagen). The XRD pattern peaks show the crystallinity of HA/collagen composite (41 %) and HA (42 %). The Ca/P ratio of the material composite was 1.77. The ratio was osteoconductive, and this characteristic was the main requirement for bone grafts. From TGA, the weight loss occurred between temperatures of 25 °C and 1000 °C with three stages: water absorption (1.844 %), removal of organic content (2.854 %), and decomposition of inorganic compounds (3.517 %).</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-10-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142533480","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thiazole-based flame retardant for polyamide vs. a sulfur-free flame retardant with similar phosphorus and nitrogen content 聚酰胺用噻唑基阻燃剂与磷氮含量相似的无硫阻燃剂的比较

IF 4.3 3区材料科学

Materials Chemistry and Physics Pub Date : 2024-10-15 DOI: 10.1016/j.matchemphys.2024.130043

引用次数: 0

Structural phase transition from rhombohedral to monoclinic phase and physical properties of (1-x) Bi0.85La0.15FeO3 – (x) Ca0.5Sr0.5TiO3 ceramics prepared by the solid-state route 固态路线制备的 (1-x) Bi0.85La0.15FeO3 - (x) Ca0.5Sr0.5TiO3 陶瓷从斜方相到单斜相的结构相变及物理性质

IF 4.3 3区材料科学

Materials Chemistry and Physics Pub Date : 2024-10-13 DOI: 10.1016/j.matchemphys.2024.130033

{"title":"Structural phase transition from rhombohedral to monoclinic phase and physical properties of (1-x) Bi0.85La0.15FeO3 – (x) Ca0.5Sr0.5TiO3 ceramics prepared by the solid-state route","authors":"","doi":"10.1016/j.matchemphys.2024.130033","DOIUrl":"10.1016/j.matchemphys.2024.130033","url":null,"abstract":"<div><div>In the present work, a series of solid solutions were synthesized using the solid-state reaction method for x = 0.0, 0.05, 0.10, and 0.15 in system (1-x)Bi<sub>0.85</sub>La<sub>0.15</sub>FeO₃-(x)Ca<sub>0.5</sub>Sr<sub>0.5</sub>TiO<sub>3</sub> or ((1-x)BLFO-(x)CSTO) ceramics. Structural, optical, dielectric, and ferroelectric properties were studied in detail to investigate the impact of CSTO doping in BFO. Rietveld analysis of X-ray diffraction data of all samples revealed the formation of a single-phase solid solution with a distorted rhombohedral perovskite structure for x = 0.00 and 0.05, characterized by <em>R</em>3<em>c</em> symmetry, a mix of rhombohedral (<em>R</em>3<em>c</em>) and monoclinic (<em>Cc</em>) phases for x = 0.10 (<em>R</em>3<em>c</em> 31 % and <em>Cc</em> 69 %), whereas for x = 0.15 a single-phase solid solution with <em>Cc</em> symmetry was found. UV–visible analysis demonstrated that the optical band gap was increased from 2.11 eV for x = 0.0 to 2.21 eV for x = 0.15 in the visible range, and can be used in photovoltaics applications. The room temperature dielectric properties were measured, and a crucial role of CSTO was revealed in modifying the dielectric properties of BLFO ceramics; the dielectric constant and dielectric loss at 10 kHz change from <em>ε</em><sub><em>r</em></sub> = 82 and <em>tanδ</em> = 0.88 for x = 0.0 to <em>ε</em><sub>r</sub> = 116 and <em>tanδ</em> = 1.08 for x = 0.15. The leakage current density decreases while increasing the CSTO % from x = 0.0 to 0.15 due to the suppression of oxygen and Bi vacancies, a fact that is further reflected in the ferroelectric properties of CSTO-doped BFO ceramics. Room temperature ferroelectric properties improved with CSTO doping, and P<sub>r</sub> was found to be 0.24 μC/cm<sup>2</sup>, 0.28 μC/cm<sup>2</sup>, and 0.84 μC/cm<sup>2</sup> for x = 0.05, 0.10, and 0.15, respectively.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142432463","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigating the influence of CuS ratio on sun light – Driven photocatalytic performance of ZnS:CuS nanocomposites and reusability of PVA/ZnS: CuS polymer membrane 研究 CuS 比率对 ZnS:CuS 纳米复合材料日光驱动光催化性能的影响以及 PVA/ZnS:CuS 聚合物膜的可重复使用性

IF 4.3 3区材料科学

Materials Chemistry and Physics Pub Date : 2024-10-12 DOI: 10.1016/j.matchemphys.2024.130025

{"title":"Investigating the influence of CuS ratio on sun light – Driven photocatalytic performance of ZnS:CuS nanocomposites and reusability of PVA/ZnS: CuS polymer membrane","authors":"","doi":"10.1016/j.matchemphys.2024.130025","DOIUrl":"10.1016/j.matchemphys.2024.130025","url":null,"abstract":"<div><div>In this study, ZnS and CuS nanocomposites (NCs) were synthesized using a simple and cost-effective co-precipitation method. These NCs were evaluated for their photocatalytic activity in degrading Crystal Violet dye under sunlight. ZnS:CuS nanocomposites were created using QDs in ratios of 4:1, 1:1, and 1:4. The synthesized NCs were analyzed for structural, morphological, chemical purity, and optical properties using XRD, TEM, EDAX, and UV–Vis spectroscopy. Structural analysis revealed phase-pure cubic and hexagonal structures for ZnS and CuS nanoparticles, respectively. The average crystallite sizes of the pure ZnS and CuS and their composites (4:1, 1:1 and 1:4) ratios are 1.66, 14.7, 1.90, 11.2 and 12.1 nm, respectively. TEM analysis confirmed aggregated and isolated particles, matching the SAED pattern and d-spacing values from XRD analysis. Increasing the CuS ratio in the composites enhanced absorption due to a bandgap reduction from 3.99 eV to 3.35 eV. The pure ZnS and CuS NPs and their composites in ratios of 4:1, 1:1, and 1:4 exhibited degradation efficiency of approximately 89 %, 87 %, 99 %, 97 %, and 96 % respectively over a period of 180 min. ZnS:CuS (4:1) exhibited outstanding photocatalytic activity, achieving 90 % degradation in 80 min under sunlight. Detailed discussions included the proposed photocatalytic mechanism, scavenging activity, and dosage effect. Hemolytic activity assays indicated that the synthesized NCs are nonhemolytic. The PVA and PVA/ZnS:CuS (4:1) composite membrane exhibited degradation efficiency of 63 % and 92 % respectively. ZnS:CuS (4:1) NCs, with their superior capacity for wastewater treatment, were incorporated into a PVA polymer membrane to enhance reusability and prevent photo-corrosion.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-10-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142432464","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Catalytic benzylation of arenes using metal-ion modified HY zeolites for sustainable synthesis 利用金属离子修饰的 HY 沸石催化炔烃的苄基化，实现可持续合成

IF 4.3 3区材料科学

Materials Chemistry and Physics Pub Date : 2024-10-11 DOI: 10.1016/j.matchemphys.2024.130034

{"title":"Catalytic benzylation of arenes using metal-ion modified HY zeolites for sustainable synthesis","authors":"","doi":"10.1016/j.matchemphys.2024.130034","DOIUrl":"10.1016/j.matchemphys.2024.130034","url":null,"abstract":"<div><div>Microporous zeolites are commonly employed as catalysts for the benzylation of arenes and benzyl alcohol. However, their catalytic efficiency is often compromised by diffusion limitations, particularly in reactions involving larger arenes. In this study, we developed metal-ion modified HY zeolites using Zn, Mg, and Ni as dopants and investigated their catalytic performance in the benzylation of a range of arenes, including toluene, benzene, mesitylene, p-xylene and with benzyl alcohol (BzOH). The structural and acidic properties of the modified HY zeolites were characterized using a combination of techniques including scanning electron microscopy (SEM), X-ray diffraction (XRD), N₂ adsorption–desorption isotherms, Fourier-transform infrared (FTIR) spectroscopy, ammonia temperature-programmed desorption (NH₃-TPD), and proton magic angle spinning nuclear magnetic resonance (<sup>1</sup>H MAS NMR) spectroscopy. The presence of catalytically active Brønsted acid sites (BAS) was detected by 1H MAS NMR spectroscopy and it was demonstrated that the HY zeolite's acidity is considerably modulated by the addition of metal ions. The catalytic evaluations indicated that the metal-ion modified HY zeolites exhibited superior activity compared to unmodified HY zeolite, with the catalytic performance following the order Zn/HY > Ni/HY > Mg/HY > HY for the benzylation of benzyl alcohol with mesitylene. Further investigation into the mechanism revealed that the synergistic effect of metal ions and acidity plays a crucial role in enhancing the accessibility of arenes to the surface catalytic sites and thereby improving catalytic performance. These findings underscore the importance of the metal-acidity synergy in optimizing the catalytic efficacy of modified HY zeolites for selective benzylation reactions.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-10-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142432466","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Tunable diameter of electrospun fibers using empirical scaling laws of electrospinning parameters 利用电纺参数的经验缩放定律调节电纺纤维的直径

IF 4.3 3区材料科学

Materials Chemistry and Physics Pub Date : 2024-10-10 DOI: 10.1016/j.matchemphys.2024.130009

{"title":"Tunable diameter of electrospun fibers using empirical scaling laws of electrospinning parameters","authors":"","doi":"10.1016/j.matchemphys.2024.130009","DOIUrl":"10.1016/j.matchemphys.2024.130009","url":null,"abstract":"<div><div>This study introduces a new semi-empirical power-law model for predicting electrospun fiber diameter (<em>D</em>), addressing key processing parameters. Polycaprolactone (PCL) fibers were produced using a solvent mixture of Trichloromethane (TCM), Dimethyl Formamide (DMF), and ethanol (EtOH). Systematic experiments validated an existing theoretical model and led to the development of a novel model: <em>D</em> ∼ (c<sup>1/2</sup><em>η</em><sup><em>1/3</em></sup><em>Q</em><sup><em>1/5</em></sup><em>X</em><sup><em>2/3</em></sup><em>)/(U</em><sup><em>2/3</em></sup><em>ω</em><sup><em>1/4</em></sup><em>I</em><sup><em>1/5</em></sup>). This model incorporates seven crucial parameters: viscosity (<em>η</em>), concentration (<em>c</em>), voltage (<em>U</em>), spinning distance (<em>X</em>), flow–rate (<em>Q</em>), current (<em>I</em>) and collector wheel rotation speed (<em>ω</em>). The model was validated through a partial factorial design experiment, proving to be a valuable and reliable tool for predicting fiber diameters and optimizing electrospinning processes. The ability to control fiber diameter is essential for tailoring electrospun fibers for various applications, including biomedicine, filtration, sensors, and lightweight materials.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":null,"pages":null},"PeriodicalIF":4.3,"publicationDate":"2024-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142533479","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0