Bulletin of Materials Science最新文献

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Immobilization and solid reaction of adsorbed metal ions using heat treatment of synthesized Na-P1 type zeolite from coal fly ash 粉煤灰合成Na-P1型沸石热处理对吸附金属离子的固定化和固相反应
IF 1.9 4区 材料科学
Bulletin of Materials Science Pub Date : 2025-01-11 DOI: 10.1007/s12034-024-03371-5
Hiromichi Aono, Ami Takahashi, Takumi Miyamoto, Yoshiteru Itagaki
{"title":"Immobilization and solid reaction of adsorbed metal ions using heat treatment of synthesized Na-P1 type zeolite from coal fly ash","authors":"Hiromichi Aono,&nbsp;Ami Takahashi,&nbsp;Takumi Miyamoto,&nbsp;Yoshiteru Itagaki","doi":"10.1007/s12034-024-03371-5","DOIUrl":"10.1007/s12034-024-03371-5","url":null,"abstract":"<div><p>The Na-P1 type zeolites were synthesized using coal fly ash (FA-Na-P1) and also using chemical reagents (CA-Na-P1) for comparison. Both Na-P1 type zeolites showed a superior adsorption ability for the non-radioactive metal ions of Cs, Sr, Mn, Zn, Co, or Fe, assuming radioisotopes with relatively long half-lives. These zeolites were heat-treated for the immobilization of the adsorbed metal ions in the decomposed zeolite. The elution ratio of the metal ions in the deionized water and seawater for 14 days showed a low elution when the sample was heated at 1000°C and higher temperature for both zeolites. In particular, the elution of the 1100°C heated sample for the zeolite from fly ash significantly decreased compared with that from the chemical reagents. The reaction between the adsorbed cation and zeolite was confirmed to form polymetallic oxide. The formation of the reacted oxide phase suppressed the elution ratio for the FA-Na-P1 zeolite.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941277","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Performance evaluation of transition metal dichalcogenide-based perovskite solar cells 过渡金属二硫族钙钛矿太阳能电池的性能评价
IF 1.9 4区 材料科学
Bulletin of Materials Science Pub Date : 2025-01-11 DOI: 10.1007/s12034-024-03360-8
Shikha Marwaha
{"title":"Performance evaluation of transition metal dichalcogenide-based perovskite solar cells","authors":"Shikha Marwaha","doi":"10.1007/s12034-024-03360-8","DOIUrl":"10.1007/s12034-024-03360-8","url":null,"abstract":"<div><p>In this work, a comprehensive analysis was performed on the perovskite solar cells (PSCs) considering MoS<sub>2</sub> as the electron transport layer. For the initial calculations, numerical simulations obtained through SCAPS-1D were matched with experimental results. Further, multi-faceted exploration of material parameters was performed to obtain better performing PSC device. Electron affinity values of MoS<sub>2</sub> layer were varied to obtain an optimum value to quantify its n-type behaviour. Furthermore, the impact of charge density and thickness of MoS<sub>2</sub>, Spiro-OMeTAD, thickness of perovskite layer, interface engineering of perovskite/charge transport layers and temperature were investigated in detail. Incorporation of optimized parameters has resulted in an improved device with <i>J</i><sub>sc</sub>, <i>V</i><sub>oc</sub>, FF and <i>η</i> values as 23.7 mA cm<sup>−2</sup>, 1.15 V, 83.04 and 22.76%, respectively. To ensure higher stability, MoTe<sub>2</sub> and WSe<sub>2</sub> as hole transport layers were also investigated in this work. The obtained results point to the applicability of these HTLs as an optimum replacement for the commonly employed transport layers. Analysis conducted in this work provides a pathway to explore prospective options for improving the efficiency and sustainability of PSCs for commercial applications.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941278","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Tuning the structural, magnetic and optical properties of EuCrO3 orthochromites through Dy3+ substitution 通过Dy3+取代调整EuCrO3正铬矿的结构、磁性和光学性质
IF 1.9 4区 材料科学
Bulletin of Materials Science Pub Date : 2025-01-11 DOI: 10.1007/s12034-024-03376-0
Meenakshi, R Kapoor, S Dash, R Bansal, A Vij, H K Chourasiya, N Kumar,  Ramovatar, S Kumar
{"title":"Tuning the structural, magnetic and optical properties of EuCrO3 orthochromites through Dy3+ substitution","authors":"Meenakshi,&nbsp;R Kapoor,&nbsp;S Dash,&nbsp;R Bansal,&nbsp;A Vij,&nbsp;H K Chourasiya,&nbsp;N Kumar,&nbsp; Ramovatar,&nbsp;S Kumar","doi":"10.1007/s12034-024-03376-0","DOIUrl":"10.1007/s12034-024-03376-0","url":null,"abstract":"<div><p>In this study, EuCrO<sub>3</sub> (ECO) and Eu<sub>0.9</sub>Dy<sub>0.10</sub>CrO<sub>3</sub> (EDCO) rare-earth orthochromite compositions were synthesized through the traditional solid-state reaction technique. A comprehensive investigation was conducted to analyse the effect of the substitution of 10 wt% Dy<sup>3+</sup> ions on the structural, optical and magnetic properties of EuCrO<sub>3</sub>. The X-ray diffraction results along with Rietveld refinement confirm the monophasic nature with an orthorhombic distorted perovskite structure for both compositions. Field emission scanning electron microscopy reveals polycrystalline microstructures with average grain sizes ranging from 269 to 327 nm for both compounds. The optical bandgap is evaluated by Tauc’s relation and is observed to slightly increase from 2.24 to 2.33 eV with Dy<sup>3+</sup> ions substitution. Optical parameters, including skin depth, extinction coefficient, refractive index and optical conductivity are determined and their variations with Dy substitution are analysed. Temperature-dependent magnetic analysis reveals a Néel temperature (<i>T</i><sub>N</sub>) of 177 K in EDCO composition, lower than that of pristine EuCrO<sub>3</sub> (<i>T</i><sub>N</sub> ~181 K). The magnetocaloric effect of the EDCO compound demonstrates a magnetic entropy change (Δ<i>S</i>) and relative cooling power of –0.27 J kg<sup>−1</sup> K and 4.4 J kg<sup>−1</sup>, respectively, near <i>T</i><sub>N</sub> under the application of 7 Tesla field. This study highlights the tunability of EuCrO<sub>3</sub> properties through Dy ion substitution for customized applications.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Impedance spectroscopic study on nanocrystalline Ce0.75Zr0.25O2 ceramics 纳米晶Ce0.75Zr0.25O2陶瓷的阻抗谱研究
IF 1.9 4区 材料科学
Bulletin of Materials Science Pub Date : 2025-01-11 DOI: 10.1007/s12034-024-03387-x
Sushama Kumari, S K Sharma, Ramcharan Meena, Vijay Kumar Goel, Swati Bugalia
{"title":"Impedance spectroscopic study on nanocrystalline Ce0.75Zr0.25O2 ceramics","authors":"Sushama Kumari,&nbsp;S K Sharma,&nbsp;Ramcharan Meena,&nbsp;Vijay Kumar Goel,&nbsp;Swati Bugalia","doi":"10.1007/s12034-024-03387-x","DOIUrl":"10.1007/s12034-024-03387-x","url":null,"abstract":"<div><p>The effect of the grain size on the dielectric properties and electrical conductivity was studied for single-phase solid solution of the ZrO<sub>2</sub>–CeO<sub>2</sub> system with 75% CeO<sub>2</sub>. The bi-ceramic composition of ZrO<sub>2</sub>–CeO<sub>2</sub> as Ce<sub>0.75</sub>Zr<sub>0.25</sub>O<sub>2</sub> was prepared through a solid-state reaction to synthesize single-phasic material followed by high-energy ball milling to make finer particle size. Structural properties were confirmed through advanced analytical techniques such as XRD and Raman spectroscopy. SEM confirmed large porosity with a grain size of 204 ± 3 nm, which is larger than the crystallite size of 22.64 ± 8.6 nm calculated from the XRD analysis for Ce<sub>0.75</sub>Zr<sub>0.25</sub>O<sub>2</sub>. The dielectric measurements were performed as a function of temperature by impedance spectroscopy. The relative dielectric constant decreases on increasing frequency for all temperatures, which validates the polar nature of nanocrystalline Ce<sub>0.75</sub>Zr<sub>0.25</sub>O<sub>2</sub> ceramic. In addition, temperature-dependent enhancement in <span>({varepsilon }_{text{r}})</span> is more pronounced in low-frequency regions due to low-frequency dielectric dispersion phenomena. The dielectric loss also increases with increasing temperature over the frequency region from 100 Hz to 2 MHz. The electrical conductivity of nanocrystalline Ce<sub>0.75</sub>Zr<sub>0.25</sub>O<sub>2</sub> was found to be smaller than the micron-sized sample of Ce<sub>0.75</sub>Zr<sub>0.25</sub>O<sub>2</sub>. The present study revealed the crucial role of grain size in tuning the dielectric properties of Ce<sub>0.75</sub>Zr<sub>0.25</sub>O<sub>2</sub> along with ac conductivity.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941279","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Natural polysaccharide-based polymeric materials used as bio-templates for the synthesis of metal/metal oxide nanocomposite particles and their sensing and catalytic applications 天然多糖类高分子材料作为生物模板用于金属/金属氧化物纳米复合粒子的合成及其传感和催化应用
IF 1.9 4区 材料科学
Bulletin of Materials Science Pub Date : 2025-01-11 DOI: 10.1007/s12034-024-03390-2
Jagabandhu Ray, Barun Mondal, Rakesh Kumar Saren, Tridib Tripathy
{"title":"Natural polysaccharide-based polymeric materials used as bio-templates for the synthesis of metal/metal oxide nanocomposite particles and their sensing and catalytic applications","authors":"Jagabandhu Ray,&nbsp;Barun Mondal,&nbsp;Rakesh Kumar Saren,&nbsp;Tridib Tripathy","doi":"10.1007/s12034-024-03390-2","DOIUrl":"10.1007/s12034-024-03390-2","url":null,"abstract":"<div><p>Water contamination by hazardous heavy metal ions and organic compounds causes environmental damage towards aquatic species and human health. Thus the evolution of highly selective, affordable, rapid and effective analytical tools for the removal and detection of toxic heavy metal ions and organic compounds in aqueous environments is a challenging objective. Electrochemical detection of metal ions and organic compounds is a very useful and effective method, where modified electrodes with metal nanocomposite particles are used. Materials with high porosity, low-charge transfer resistance and large electroactive area are desirable for electrode modification in order to act as an efficient electrochemical sensor. It has been established that natural polysaccharide-based graft copolymers with acrylic monomers can be efficiently used as ‘bio-template’ for preparing mono and bimetallic/metal oxide composite nanoparticles for sensing and catalytic applications. This is because of the fact that polysaccharide-based graft copolymers are eco-friendly in nature and have the potential to act as reducing and stabilizing agents. The bio-template-based metal/metal oxide nanocomposites are successfully used for the electrochemical sensing of some heavy metal ions, like Hg<sup>2+</sup>, Cd<sup>2+</sup>, Th<sup>4+</sup>, Zn<sup>2+</sup>, Pb<sup>2+</sup>, etc., and toxic phenolic compounds, and also show efficient catalytic application in azo dye degradation and p-nitrophenol reduction. The developed electrochemical sensors are selective, sensitive and effective for the detection of toxic heavy metal ions in real water samples. Here we summarize the various investigations carried out using metal/metal oxide nanocomposite particles (mono and bimetallic) in electrochemical sensing of toxic heavy metal ions and catalytic applications.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-01-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142941280","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Thermal influence on the current–voltage characteristics of TiN/Al2O3/p-Si MIS devices for emerging nanotechnology applications 热对新兴纳米技术应用中TiN/Al2O3/p-Si MIS器件电流-电压特性的影响
IF 1.9 4区 材料科学
Bulletin of Materials Science Pub Date : 2025-01-03 DOI: 10.1007/s12034-024-03375-1
Slah Hlali, Neila Hizem, Liviu Militaru, Adel Kalboussi, Abdelkader Souifi
{"title":"Thermal influence on the current–voltage characteristics of TiN/Al2O3/p-Si MIS devices for emerging nanotechnology applications","authors":"Slah Hlali,&nbsp;Neila Hizem,&nbsp;Liviu Militaru,&nbsp;Adel Kalboussi,&nbsp;Abdelkader Souifi","doi":"10.1007/s12034-024-03375-1","DOIUrl":"10.1007/s12034-024-03375-1","url":null,"abstract":"<div><p>This study investigates the current–voltage (<i>I–V</i>) characteristics of a Schottky Metal-Insulator-Semiconductor (MIS) structure, specifically featuring a titanium nitride (TiN) electrode interfaced with p-type silicon (p-Si) and a high-k aluminum oxide (Al<sub>2</sub>O<sub>3</sub>) layer with a thickness of 17 nm, enabling a detailed analysis of its influence on device performance. Conducted over a temperature range of 270 to 450 K, the research employs thermionic emission (TE) theory to extract critical electrical parameters, including reverse saturation current (<i>I</i><sub>0</sub>), ideality factor (n), zero bias barrier height (<span>(Phi_{B0})</span>), series resistance (Rs) and rectification rate (RR). The analysis reveals a mean barrier height (BH) of 0.274 eV and a Richardson constant (A*) of 42.19 A (cm K)<sup>−1</sup>, both of which closely align with theoretical predictions for p-type silicon, suggesting that the thermionic emission mechanism, characterised by a Gaussian distribution of barrier heights, effectively describes the <i>I–V–T</i> behaviour of the fabricated Schottky structure. These findings elucidate the complex interplay between temperature and diode performance, offering significant insights for the optimisation and design of thermally-sensitive electronic devices leveraging this advanced Schottky MIS configuration.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142912858","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Electrocatalytic behaviour of Co–Fe–Ni–Cr–V–Zr eutectic high entropy alloy Co-Fe-Ni-Cr-V-Zr共晶高熵合金的电催化行为
IF 1.9 4区 材料科学
Bulletin of Materials Science Pub Date : 2024-12-27 DOI: 10.1007/s12034-024-03367-1
Girish Khanna Raja Mohan, Mayank K Singh, Dhirendra Kumar Rai, Sumanta Samal
{"title":"Electrocatalytic behaviour of Co–Fe–Ni–Cr–V–Zr eutectic high entropy alloy","authors":"Girish Khanna Raja Mohan,&nbsp;Mayank K Singh,&nbsp;Dhirendra Kumar Rai,&nbsp;Sumanta Samal","doi":"10.1007/s12034-024-03367-1","DOIUrl":"10.1007/s12034-024-03367-1","url":null,"abstract":"<div><p>The electrocatalytic behaviour of bulk eutectic high entropy alloys (EHEAs) has rarely been explored despite possessing large electrocatalytic active sites. In this work, bulk EHEA has been investigated as an electrocatalyst considering hydrogen evolution reaction (HER) and oxygen evolution reaction (OER). The results depict good kinetic behaviour, evidenced by a low Tafel slope of 251 mV dec<sup>−1</sup> and an overpotential of −0.415 V to achieve −0.01 A cm<sup>−2</sup> for HER. Similarly, for OER, a low Tafel slope of 115 mV dec<sup>−1</sup> and overpotential of 1.5879 V to achieve 0.01 A cm<sup>−2</sup>, with good long-term electrolysis stability for 24 h are achieved. The electrochemically active surface area of EHEA catalyst for both HER and OER is 0.033 and 0.0727 cm<sup>2</sup>, respectively.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889935","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Synthesis of Fe90Nb10 via wet mechanical milling method and its structural, magnetic and thermal characterization 湿法机械铣削法合成Fe90Nb10及其结构、磁性和热表征
IF 1.9 4区 材料科学
Bulletin of Materials Science Pub Date : 2024-12-27 DOI: 10.1007/s12034-024-03372-4
Ali Hafs, Toufik Hafs, Djamel Berdjane, Amel Bendjama, Nesrine Hasnaoui
{"title":"Synthesis of Fe90Nb10 via wet mechanical milling method and its structural, magnetic and thermal characterization","authors":"Ali Hafs,&nbsp;Toufik Hafs,&nbsp;Djamel Berdjane,&nbsp;Amel Bendjama,&nbsp;Nesrine Hasnaoui","doi":"10.1007/s12034-024-03372-4","DOIUrl":"10.1007/s12034-024-03372-4","url":null,"abstract":"<div><p>This study involves the synthesis of nanocrystalline Fe<sub>90</sub>Nb<sub>10</sub> (wt%) binary powders through the use of a high-energy planetary ball mill within an inert argon environment. The milling process was used to investigate changes in structure, morphology and magnetic properties. This was accomplished through the utilization of techniques such as X-ray diffraction (XRD) using the MAUD program, which is based on the Rietveld method, scanning electron microscopy (SEM), energy-dispersive X-ray (EDX) and vibrating sample magnetometry. From the XRD analysis, it was observed that a disordered solid solution of αFe(Nb) with a body-centred cubic (bcc) crystal structure formed after 12 h of milling. Interestingly, the analysis also indicated that the average crystallite size 〈<i>D</i>〉 within this αFe(Nb) solid solution was remarkably small, measuring a mere 13.15 nm. Furthermore, the ultimate lattice strain 〈<i>σ</i><sup>2</sup>〉<sup>1/2</sup> was quantified at 1.08%. It is worth noting that the lattice parameter underwent a rapid and substantial increase, peaking at 0.2879 nm after 36 h of milling. The SEM analyses revealed the development of diverse morphologies at different milling stages. The elemental maps of Fe and Nb done with EDX experiments confirmed the results found by XRD about the evolution of the alloy formation. The changes in saturation magnetization (<i>M</i><sub>s</sub>), coercive field (<i>H</i><sub>c</sub>), remanent magnetization (<i>M</i><sub>r</sub>) and squareness ratio (<i>M</i><sub>r</sub>/<i>M</i><sub>s</sub>) were investigated in relation to microstructural modifications during the milling process. Annealing Fe<sub>90</sub>Nb<sub>10</sub> (wt%) samples promotes the formation of a homogeneous solid solution and increases coercivity.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889769","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Influence of residual stress on corrosion and mechanical properties of silicon carbide-reinforced nickel–tungsten coatings 残余应力对碳化硅增强镍钨镀层腐蚀及力学性能的影响
IF 1.9 4区 材料科学
Bulletin of Materials Science Pub Date : 2024-12-27 DOI: 10.1007/s12034-024-03369-z
Swarnima Singh, Anup Kumar Keshri, Sisir Mantry
{"title":"Influence of residual stress on corrosion and mechanical properties of silicon carbide-reinforced nickel–tungsten coatings","authors":"Swarnima Singh,&nbsp;Anup Kumar Keshri,&nbsp;Sisir Mantry","doi":"10.1007/s12034-024-03369-z","DOIUrl":"10.1007/s12034-024-03369-z","url":null,"abstract":"<div><p>Nickel–tungsten (Ni–W) coatings reinforced with silicon carbide (SiC) were successfully produced on a steel substrate using the pulse electrodeposition method (PED). Influence of SiC addition on phases, crystallite size, dislocation density, residual stress, mechanical properties and corrosion resistance of the coating were investigated. Field emission scanning electron microscopy (FESEM) images revealed a refinement in the coating’s surface morphology and distribution of SiC particles. Higher residual stress observed in the as-deposited Ni–W coating was attributed to hydrogen dissolution into the coating, leading to lattice expansion, with the subsequent release of hydrogen, contributing to this stress. Addition of SiC to the Ni–W coating resulted in improvements in hardness and bonding strength by ~23% and ~184%, respectively. Moreover, the addition of SiC to Ni–W coating led to a reduction in the coefficient of friction by about ~34% compared to Ni–W coating. Corrosion properties were evaluated using an immersion test in a 3.5 wt.% NaCl solution. The Ni–W–SiC composite coating exhibited significantly higher corrosion resistance, with ~67% decrease in corrosion rate compared to Ni–W coating. This enhanced corrosion resistance was linked to the grain refinement induced by SiC, which restricted the penetration of corrosive ions onto the substrate. Furthermore, the formation of a continuous barrier layer composed of SiO<sub>2</sub>, contributed to the improved corrosion resistance.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889835","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
Preparation of nesquehonite powder by solid-phase conversion of magnesite and its phase conversion mechanism 菱镁矿固相转化制备菱镁矿粉体及其相变机理
IF 1.9 4区 材料科学
Bulletin of Materials Science Pub Date : 2024-12-27 DOI: 10.1007/s12034-024-03368-0
YULIAN WANG, YIFAN ZHANG, TIANJIAO SHI, JIAYI LIU, QIHAO WANG, YIBIN ZHU, JUN ZHANG, ZHIGANG YUAN, JIN YAO, WANZHONG YIN
{"title":"Preparation of nesquehonite powder by solid-phase conversion of magnesite and its phase conversion mechanism","authors":"YULIAN WANG,&nbsp;YIFAN ZHANG,&nbsp;TIANJIAO SHI,&nbsp;JIAYI LIU,&nbsp;QIHAO WANG,&nbsp;YIBIN ZHU,&nbsp;JUN ZHANG,&nbsp;ZHIGANG YUAN,&nbsp;JIN YAO,&nbsp;WANZHONG YIN","doi":"10.1007/s12034-024-03368-0","DOIUrl":"10.1007/s12034-024-03368-0","url":null,"abstract":"<div><p>A novel and straightforward ion-catalysed magnesite solid-phase conversion method was used to prepare nesquehonite powder. Magnesite and slaked lime were used as raw materials and MgCl<sub>2</sub> was used as the catalyst. Magnesite could be directly converted to magnesium hydroxide by the solid-phase conversion method, and nesquehonite crystals were prepared by carbonisation and pyrolysis. The physical composition and microscopic morphology of the products were characterised by XRD and SEM, and the solid-phase conversion mechanism was analysed. The effect of catalyst type, solid-to-liquid ratio, hydration temperature, MgCl<sub>2</sub> addition and magnesite ore powder to slake lime mass ratio on the magnesium conversion rate was investigated. The rod-like nesquehonite crystals with good crystalline structures were obtained when the hydration temperature was 85°C, the solid-liquid ratio was 1:40, addition of MgCl<sub>2</sub> was 5%, magnesite ore powder to calcium hydroxide ratio was 1:2 and magnesium conversion rate reached 20.98%. The catalyst MgCl<sub>2</sub> could react with Ca(OH)<sub>2</sub> rapidly to form CaCl<sub>2</sub>, which improves the ionic strength in the bulk solution as an intermediate product. Consequently, the solubility of magnesite was improved due to the salt effect and the conversion rate of magnesium was further increased.</p></div>","PeriodicalId":502,"journal":{"name":"Bulletin of Materials Science","volume":"48 1","pages":""},"PeriodicalIF":1.9,"publicationDate":"2024-12-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142889833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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
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