Materials Chemistry and Physics最新文献_第3页

Inhibition of corrosion mechanism of Cl− in 304 stainless steel by different SO42− concentration at 30 °C 30℃下不同SO42−浓度对304不锈钢中Cl−的缓蚀机理研究

IF 4.3 3区材料科学

Materials Chemistry and Physics Pub Date : 2025-05-08 DOI: 10.1016/j.matchemphys.2025.130979

Xin Zhang, Xinyue Liu, Yonglong Wu, Xiaoqiang Li, Xiaoxiao Duan, Yongsheng Ren

{"title":"Inhibition of corrosion mechanism of Cl− in 304 stainless steel by different SO42− concentration at 30 °C","authors":"Xin Zhang, Xinyue Liu, Yonglong Wu, Xiaoqiang Li, Xiaoxiao Duan, Yongsheng Ren","doi":"10.1016/j.matchemphys.2025.130979","DOIUrl":"10.1016/j.matchemphys.2025.130979","url":null,"abstract":"<div><div>The development of passivation layer and characterization of pitting formation on the surface of 304 stainless steel (SS) in solutions containing different concentrations of 0.38 M Cl<sup>−</sup> were investigated. Electrochemical methods, Mott-Schottky analysis, XPS, pitting growth analysis and surface morphology characterization were used in the study. The results show that an increase in the concentration of SO<sub>4</sub><sup>2−</sup> at 0, 0.097 M, 0.106 M, and 0.113 M leads to an increase in corrosion potential, breakdown potential, and a decrease in corrosion current density, whereas a change in the concentration of SO<sub>4</sub><sup>2−</sup> inhibits the corrosion reaction and pitting growth of Cl<sup>−</sup> on stainless steel. In the presence of sulfate ions, a sulfate film forms on the top of the passivation film due to the interaction between SO<sub>4</sub><sup>2−</sup> and the metal cations. The adsorption of SO<sub>4</sub><sup>2−</sup> on the surface of the sample replaces some of the Cl<sup>−</sup>, reducing the oxygen vacancies available for the adsorption of Cl<sup>−</sup> and lowering the carrier density. At the bottom of the crater, the large amount of SO<sub>4</sub><sup>2−</sup> adsorption prevents the penetration of Cl<sup>−</sup>, thus inhibiting the growth of the pitting craters.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"343 ","pages":"Article 130979"},"PeriodicalIF":4.3,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143931763","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

Synthesis and electrochemical properties of nanostructured binder-free MgS–NiS as electrode material for supercapacitor applications 纳米结构无粘结剂MgS-NiS超级电容器电极材料的合成及其电化学性能

IF 4.3 3区材料科学

Materials Chemistry and Physics Pub Date : 2025-05-07 DOI: 10.1016/j.matchemphys.2025.130997

Misbah Yousaf, I.A. Khan, A. Farid

{"title":"Synthesis and electrochemical properties of nanostructured binder-free MgS–NiS as electrode material for supercapacitor applications","authors":"Misbah Yousaf, I.A. Khan, A. Farid","doi":"10.1016/j.matchemphys.2025.130997","DOIUrl":"10.1016/j.matchemphys.2025.130997","url":null,"abstract":"<div><div>The worldwide energy crisis imposes massive complications leading towards the growth of revolutionary devices, amid them the supercapacitors and batteries are supposed to be based on sustainable energy storage technology. The engineering of nanostructured materials with porous surface morphologies and binder-free synthesis of novel nanostructured electrode materials (EMs) is a better option for electrochemical energy sources. This study reports the synthesis of innovative binder-free MgS–NiS EMs (containing weight%: Ni = 45.6, S = 18.3 and Mg = 36.1 %) that acquires high energy density (42 Wh/kg), high power density (2048 W/kg), high specific capacities (4317 F/g at 0.5 mV/s), good capacity retention (96 %), high Coulombic efficiency (100 %) and excellent cyclic stability even after 20000 cycles via a simple home-made chemical vapor deposition technique. The structural and morphological properties resulted in surface area of 105.17 m<sup>2</sup>/g and pore size of 6.9 nm of MgS–NiS EMs that increases the active sites results in the increase of electrochemical performance. The redox reactions occurred in MgS–NiS EMs are controlled by diffusive controlled contribution at lower scan rates while such redox reactions are controlled by capacitive controlled contribution at higher scan rates. The achievement of smaller charge transfer resistance (negligibly small semicircle formation) indicates the high conductivity of MgS–NiS EMs that will enhance the inter-layer transference of electrons. Such enhanced electrochemical capabilities of MgS–NiS EMs hold considerable potential in functional practicability.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"343 ","pages":"Article 130997"},"PeriodicalIF":4.3,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144068905","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

Control of structure and corrosion performance in PEO coatings on AZ91/Ti composites: influence of electrolyte composition AZ91/Ti复合材料PEO涂层结构与腐蚀性能的控制：电解液组成的影响

IF 4.3 3区材料科学

Materials Chemistry and Physics Pub Date : 2025-05-07 DOI: 10.1016/j.matchemphys.2025.130995

Jinchao Jiao , Yongrui Gu , Xiaoyun Ding , Jinghan Yang , Menghui Cui , Yong Lian , Jin Zhang , Kaihong Zheng , Fusheng Pan

{"title":"Control of structure and corrosion performance in PEO coatings on AZ91/Ti composites: influence of electrolyte composition","authors":"Jinchao Jiao , Yongrui Gu , Xiaoyun Ding , Jinghan Yang , Menghui Cui , Yong Lian , Jin Zhang , Kaihong Zheng , Fusheng Pan","doi":"10.1016/j.matchemphys.2025.130995","DOIUrl":"10.1016/j.matchemphys.2025.130995","url":null,"abstract":"<div><div>The reinforcement phases in magnesium matrix composites (MMCs) may negatively impact the discharge behavior and corrosion resistance of PEO coatings, posing challenges to their application. This study investigates the PEO of AZ91/Ti composites in mixed electrolytes with varying compositions. It focuses on optimizing the coating phase composition to regulate the electrical structure and discharge behavior. These improvements ultimately improve the coating structure and performance. The results demonstrate that PEO treatment in mixed electrolytes containing silicates, phosphates, and aluminates produces a dense, self-sealing coating structure, significantly reducing the self-corrosion current density by an order of magnitude. Specifically, the presence of aluminates promotes the formation of an insulating layer on Ti reinforcement phase regions and facilitates the generation of Al<sub>2</sub>TiO<sub>5</sub>. Meanwhile, phosphates enhance MgO content in the Ti reinforcement phase regions, promoting the formation of MgTiO<sub>3</sub>. The synergistic effect of low-dielectric-constant phases, Al<sub>2</sub>TiO<sub>5</sub> and MgTiO<sub>3</sub>, reduces discharge intensity in Ti reinforcement phase areas, resulting in a dense and self-sealing pore coating structure with improved corrosion resistance.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"342 ","pages":"Article 130995"},"PeriodicalIF":4.3,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143916654","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

Optimizing fabrication parameters of Fe3O4 nanoparticles for enhancing magnetic hyperthermia efficiency 优化纳米Fe3O4制备工艺以提高磁热疗效率

IF 4.3 3区材料科学

Materials Chemistry and Physics Pub Date : 2025-05-07 DOI: 10.1016/j.matchemphys.2025.130983

Luu Huu Nguyen , Q.Nghi Pham , Eric Riviere , Pham Tien Thanh , Pham Hong Nam , Pham Van Hai , Nguyen Thi Van Anh , Le Doan Phuc , Nguyen Thi Minh Hong

{"title":"Optimizing fabrication parameters of Fe3O4 nanoparticles for enhancing magnetic hyperthermia efficiency","authors":"Luu Huu Nguyen , Q.Nghi Pham , Eric Riviere , Pham Tien Thanh , Pham Hong Nam , Pham Van Hai , Nguyen Thi Van Anh , Le Doan Phuc , Nguyen Thi Minh Hong","doi":"10.1016/j.matchemphys.2025.130983","DOIUrl":"10.1016/j.matchemphys.2025.130983","url":null,"abstract":"<div><div>In this study, Fe<sub>3</sub>O<sub>4</sub> nanoparticles (NPs) are prepared by microwave-assisted hydrothermal at various conditions of pH, reaction temperature (T), and time reaction duration (t). This work provided a comprehensive analysis and obtained conditions that pH = 10, T = 150 °C, and t = 60 min as the optimal ones for producing Fe<sub>3</sub>O<sub>4</sub> NPs with enhanced magnetic properties. In particular, the monoclinic Fe<sub>3</sub>O<sub>4</sub> phase (about 4.65 %), confirmed by FT-IR and Raman spectroscopy, plays a crucial role in achieving high saturation magnetization (M<sub>S</sub> = 83.4 emu/g) and high magnetic anisotropy (<em>K</em> = 169 kJ/m<sup>3</sup>) at room temperature for the S2 sample (9.2 nm). Additionally, the S2 sample exhibiting high heating efficiency (SAR = 387.8 W/g and ESAR = 5.13 nHm<sup>2</sup>/kg measured at C = 0.1 mg/mL, H = 175 Oe and f = 390 kHz) correlates with its magnetic properties. This results lead the promising in future to be a high efficiency nanoparticle-mediated magnetic hyperthermia for therapeutic treatments and other biomedical applications.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"343 ","pages":"Article 130983"},"PeriodicalIF":4.3,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143936750","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 vibrational structures of lead bismuth oxyhalides PbBiO2X (X = Cl, Br, I) using temperature-dependent low-wavenumber Raman spectroscopy and the emission properties of the trapped states 利用温度相关的低波数拉曼光谱研究铅铋氧化卤化物PbBiO2X （X = Cl, Br， I）的振动结构和捕获态的发射特性

IF 4.3 3区材料科学

Materials Chemistry and Physics Pub Date : 2025-05-06 DOI: 10.1016/j.matchemphys.2025.130992

Yu-Jung Wei , Fu-Yu Liu , Chiing-Chang Chen , I-Chia Chen

{"title":"Investigating the vibrational structures of lead bismuth oxyhalides PbBiO2X (X = Cl, Br, I) using temperature-dependent low-wavenumber Raman spectroscopy and the emission properties of the trapped states","authors":"Yu-Jung Wei , Fu-Yu Liu , Chiing-Chang Chen , I-Chia Chen","doi":"10.1016/j.matchemphys.2025.130992","DOIUrl":"10.1016/j.matchemphys.2025.130992","url":null,"abstract":"<div><div>Photocatalysts PbBiO<sub>2</sub>X exhibit promising catalytic behavior in the visible range. Here we study the vibrational structures and emission properties of the trapped states in these catalysts using temperature-dependent Raman spectroscopy and emission spectroscopy to understand the catalytic activity. The Raman spectra of PbBiO<sub>2</sub>X in the range of 77–623 K were obtained under both vacuum and atmospheric pressure conditions. Five bands in the range of 50–500 cm<sup>−1</sup> for all three materials were observed and assigned. From density functional theory calculations, the structural configurations of PbBiO<sub>2</sub>X are assigned to the <em>I</em>4/<em>mmm</em> structure. Phonon redshifts with temperature are mainly attributed to thermal expansion of the crystal volume. PbBiO<sub>2</sub>X exhibited more photoluminescence (PL) in near infrared after heated in a vacuum environment. The emission intensity decreased first with temperature, then increased to reach a maximum, and decreased at high temperatures. The decrease at low temperatures is for thermal quenching with activation energies of 41.4/45.5/32.6 meV for X = Cl/Br/I. At medium temperatures, the increased PL with activation energies of 321/530/590 meV, is explained to thermal activation to high-energy radiative trapped states. At > 400 K, the decreased PL is attributed to electron-hole dissociation, with activation energies of 570/644 meV for Cl/Br.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"342 ","pages":"Article 130992"},"PeriodicalIF":4.3,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143928584","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

Development of silica-based conductive hydrogels for biomedical application 生物医学用硅基导电水凝胶的研制

IF 4.3 3区材料科学

Materials Chemistry and Physics Pub Date : 2025-05-06 DOI: 10.1016/j.matchemphys.2025.130981

Elena V. Parfenyuk, Ekaterina S. Dolinina

{"title":"Development of silica-based conductive hydrogels for biomedical application","authors":"Elena V. Parfenyuk, Ekaterina S. Dolinina","doi":"10.1016/j.matchemphys.2025.130981","DOIUrl":"10.1016/j.matchemphys.2025.130981","url":null,"abstract":"<div><div>For potential use as electrically conductive materials in biomedicine, hydrogels of unmodified and organically modified silica with a pH close to neutral were synthesized by the sol-gel method. The effects of synthesis conditions (concentration of HCl as a catalyst of silica sol formation, order of mixing of silica sol and neutralizing agent (phosphate buffer solution, pH 7.4)), as well as modification of the silica matrix with organic groups (aminopropyl and mercaptopropyl) on the most important characteristics of hydrogels for the practical application, namely, electrical conductivity and viscoelastic properties (complex viscosity, storage and loss modules), were studied. It was shown that the synthesized hydrogels have ionic conductivity (15.4–18.2 mS cm<sup>−1</sup>) and exhibit pseudoplasticity, as well as solid-like behavior, and their 3D structure is stable over the frequency range 0.1–10 Hz. In contrast to the minor effect of HCl concentration, adding the phosphate buffer solution to silica sol and silica matrix modification with the organic groups led to an increase in the viscoelastic characteristics of the hydrogels but a decrease in their ionic conductivity. The obtained data showed that the synthesized silica hydrogels are promising platform for development new conductive hydrogel materials for various biomedical applications.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"342 ","pages":"Article 130981"},"PeriodicalIF":4.3,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143911997","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

Synergistic waste valorization: One-step hydrothermal synthesis of magnetic hydrochar from red mud and peanut shells for effective methylene blue adsorption 协同废物增值：以赤泥和花生壳为原料一步水热合成磁性氢炭，有效吸附亚甲基蓝

IF 4.3 3区材料科学

Materials Chemistry and Physics Pub Date : 2025-05-06 DOI: 10.1016/j.matchemphys.2025.130994

Jun Qiu , Jing-Lei Yang , Kai-Bo Cui , Xi-Jiao Cao , Jing-Wei Lyu , Hao-Ze Liu , Jia-Zhen Wang , Gui-Fang Wang , Xiao Liu

{"title":"Synergistic waste valorization: One-step hydrothermal synthesis of magnetic hydrochar from red mud and peanut shells for effective methylene blue adsorption","authors":"Jun Qiu , Jing-Lei Yang , Kai-Bo Cui , Xi-Jiao Cao , Jing-Wei Lyu , Hao-Ze Liu , Jia-Zhen Wang , Gui-Fang Wang , Xiao Liu","doi":"10.1016/j.matchemphys.2025.130994","DOIUrl":"10.1016/j.matchemphys.2025.130994","url":null,"abstract":"<div><div>Printing and dyeing wastewater is characterized by a high concentration of organic pollutants, elevated alkalinity, and significant water quality fluctuations, which lead to severe environmental pollution and potential risks to human health. This study presents an innovative approach combining red mud (RM) and peanut shells (PS) to synthesize magnetic hydrochar (MHC) via a one-step hydrothermal method for methylene blue (MB) removal. The physicochemical properties and synthesis mechanism of MHC were characterized through X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDX), X-ray photoelectron spectroscopy (XPS), vibrating sample magnetometer (VSM), and Brunauer-Emmett-Teller (BET) analysis. The hydrothermal carbonization process of PS promoted magnetite formation, and the obtained MHC exhibited a saturation magnetization of 24.3 A·m<sup>2</sup>·kg<sup>−1</sup>. Under the conditions of adsorption time at 2 h, pH = 10, starting MB concentration at 160 mg·L<sup>−1</sup>, and MHC dosage at 1 g·L<sup>−1</sup>, the maximum adsorption capacity reached 123.26 mg·g<sup>−1</sup>. The adsorption process conformed to the Freundlich isotherm and the pseudo-second order kinetic models, indicating adsorption predominantly occurred on the heterogeneous surface, with chemisorption as the rate-controlling step. Thermodynamic analysis confirmed that the process was spontaneous, endothermic, and associated with increased entropy. The adsorption mechanism involved complexation, π-π interaction, electrostatic interaction and hydrogen bonding. These findings provide valuable insights into the synthesis and practical utilization of RM and PS-based MHC for wastewater treatment.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"342 ","pages":"Article 130994"},"PeriodicalIF":4.3,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143924211","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

Design and performance study of superhydrophobic low-adhesion anti-icing coating with photothermal response 光热响应超疏水低粘着防冰涂料的设计与性能研究

IF 4.3 3区材料科学

Materials Chemistry and Physics Pub Date : 2025-05-06 DOI: 10.1016/j.matchemphys.2025.130996

Tianqi Wang , Hongrui Yao , Na Wang , Yangsong Wang , Fei Wang

{"title":"Design and performance study of superhydrophobic low-adhesion anti-icing coating with photothermal response","authors":"Tianqi Wang , Hongrui Yao , Na Wang , Yangsong Wang , Fei Wang","doi":"10.1016/j.matchemphys.2025.130996","DOIUrl":"10.1016/j.matchemphys.2025.130996","url":null,"abstract":"<div><div>Superhydrophobic coatings have attracted significant attention for their potential in anti-icing applications. However, their practical application is often hampered by inherent limitations, such as mechanical durability and insufficient de-icing performance. In this study, a functional filler (ODA/MnO<sub>2</sub>@PDA-SiO<sub>2</sub>, OMPS) is synthesized by simple grafting and redox reaction, and a robust superhydrophobic low-adhesion anti-icing coating (OMPS-PDMS/E51) is prepared through spraying. The OMPS-PDMS/E51 coating surface shows a uniformly distributed concave-convex structure with a roughness value of 33.209 μm. This fine micro-nano structure makes the water contact angle of the coating surface as high as 157.1° and the rolling angle as low as 4.6°, indicating that the coating has excellent superhydrophobicity. Meanwhile, the coating surface is in a low water adhesion Cassie-Baxter state, so it has good antifouling and self-cleaning properties. Additionally, Cassie-Baxter wetting mode can minimize the contact between the coating and water, thereby inhibiting the formation and anchoring of ice core, so the freezing delay time of the OMPS-PDMS/E51 coating is up to 358 s and the ice adhesion strength is as low as 26.3 KPa. Notably, the OMPS-PDMS/E51 coating also exhibits the characteristics of active de-icing, which can rapidly heat up the coating surface through photothermal conversion, such as its surface temperature can reach 82.9 °C after infrared irradiation for 400 s, and the ice formed at −20 °C on the coating can melt within 144 s. These properties highlight the OMPS-PDMS/E51 coating's potential for long-term anti-icing and de-icing applications in harsh environments.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"342 ","pages":"Article 130996"},"PeriodicalIF":4.3,"publicationDate":"2025-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143928582","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

Investigation of the tribological behavior of 2D sinusoidal texture CoNiCrFeMn high-entropy alloy coating on Ni substrate Ni基体上二维正弦织构CoNiCrFeMn高熵合金涂层摩擦学行为研究

IF 4.3 3区材料科学

Materials Chemistry and Physics Pub Date : 2025-05-05 DOI: 10.1016/j.matchemphys.2025.130991

Youhua Li, Qianli Ma, Xuetao Qiao, Xiaolong Yin, Hechun Yu, Wenbo Wang, Guoqing Zhang

{"title":"Investigation of the tribological behavior of 2D sinusoidal texture CoNiCrFeMn high-entropy alloy coating on Ni substrate","authors":"Youhua Li, Qianli Ma, Xuetao Qiao, Xiaolong Yin, Hechun Yu, Wenbo Wang, Guoqing Zhang","doi":"10.1016/j.matchemphys.2025.130991","DOIUrl":"10.1016/j.matchemphys.2025.130991","url":null,"abstract":"<div><div>Two-dimensional (2D) sinusoidal texture was applied to CoNiCrFeMn high entropy alloy (HEA) coating. The tribological behavior of HEA/Ni workpieces under different conditions was studied by molecular dynamics (MD) simulation. The friction behavior and influence mechanism of non-textured and textured workpieces under different conditions were compared. The results show that when the periodic parameter of the texture <em>T</em> = 30, the subsurface damage depth of the workpiece decreases, the internal dislocation strengthening decreases, resulting in the tangential force and normal force decrease, and the friction coefficient decreases. At the friction depths of 15 Å, 20 Å, and 25 Å, the number of worn atoms decreases by 85.3 %, 73.4 %, and 65.85 %, respectively. In addition, the presence of texture improves the local temperature rise and shear strain accumulation caused by higher scratch velocity, resulting in uniform stress distribution during friction and improved wear resistance of the workpiece.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"342 ","pages":"Article 130991"},"PeriodicalIF":4.3,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143924212","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

Effects of fluorides on NaF pore formation and heat control of mold slag films 氟化物对结晶器渣膜NaF孔形成及热控制的影响

IF 4.3 3区材料科学

Materials Chemistry and Physics Pub Date : 2025-05-05 DOI: 10.1016/j.matchemphys.2025.130993

Qiuping Li, Zerong Duan, Guanghua Wen, Ping Tang, Zibing Hou

{"title":"Effects of fluorides on NaF pore formation and heat control of mold slag films","authors":"Qiuping Li, Zerong Duan, Guanghua Wen, Ping Tang, Zibing Hou","doi":"10.1016/j.matchemphys.2025.130993","DOIUrl":"10.1016/j.matchemphys.2025.130993","url":null,"abstract":"<div><div>Low-basicity fluorine-containing mold flux, which forms a porous slag film with NaF pores, is expected to solve the contradiction between heat transfer and lubrication in the continuous casting process of peritectic steel. Herein, slag films were obtained by slag film heat flow simulator, and the thermal control of NaF pores in the slag film was evaluated by COMSOL. Based on the influence of fluorides on NaF gas generation, mold fluxes consisting of NaF, CaF<sub>2</sub>, and Na<sub>3</sub>AlF<sub>6</sub> were investigated separately at a basicity of 0.9 and a fluorine content of 6 wt%. The comprehensive heat control ability of these slag films ranked in the order: Na<sub>3</sub>AlF<sub>6</sub> > CaF<sub>2</sub> > NaF. Firstly, the slag film using NaF raw material exhibited larger NaF pores (30–50 μm), resulting in higher radiative transmittance and reduced thermal resistance. Its heat control is primarily dominated by the thickness of the film. Further, using CaF<sub>2</sub> raw material, the heat control ability and pore size were between NaF and Na<sub>3</sub>AlF<sub>6</sub>. Its slag film exhibited the highest surface roughness (27.32 μm), with interfacial thermal resistance playing a dominant role. With Na<sub>3</sub>AlF<sub>6</sub> as the fluorine source, the slag film exhibited finer and more uniformly distributed pores (10–30 μm), which enhanced reflectivity and reduced radiative heat transfer. Therefore, this study highlights that Na<sub>3</sub>AlF<sub>6</sub> as a raw material is conducive to low-basicity mold fluxes achieving thermal control through finely dispersed NaF pores.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"342 ","pages":"Article 130993"},"PeriodicalIF":4.3,"publicationDate":"2025-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143916650","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