Materials Chemistry and Physics最新文献_第5页

Incorporation of B and V oxides into bioactive glass by melt quenching: In vitro studies for bone regeneration applications 通过熔体淬火将 B 和 V 氧化物掺入生物活性玻璃：骨再生应用的体外研究

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2024-10-29 DOI: 10.1016/j.matchemphys.2024.130096

Anmar Fouad Kadhim Ibadi , A. Najah Saud , Alper Incesu

In this study, glass-ceramics with a weight composition of 40-X% SiO₂, 24.5 % CaO, 14.5 % Na₂O, 6.0 % P₂O₅, 15 % B₂O₃, and X% V₂O₅ (X = 1, 3, and 5) were produced using the melt quenching method. Vanadium pentoxide and boron oxide were suggested to lower production melting temperatures. Several techniques were used to confirm the composition and amorphous nature of the glass-ceramics, including X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetry (TG), energy dispersive spectroscopy (EDS), and differential thermal analysis (DTA). All samples were incubated in simulated body fluid (SBF) solution at 37 °C for 3, 7, 14, and 21 days to determine their bioactivity under in vitro conditions. The XRD pattern indicates insufficient crystalline phase formation, possibly due to V₂O₅ inhibiting apatite growth and promoting amorphous calcium phosphate. Precipitates in the glass-ceramic show increased lattice constants when apatite combines with boron. SEM images reveal surface precipitation and the development of hydroxyapatite (HA) after 21 days of immersion in SBF; EDS analysis confirms the presence of the expected ions. The Fourier Transform Infrared Spectrophotometer (FTIR) analysis shows the dominance of the silicate network in the glass-ceramics, with characteristic bands at specific frequencies.

在这项研究中，使用熔体淬火法生产了玻璃陶瓷，其重量成分为 40-X% SiO₂、24.5% CaO、14.5% Na₂O、6.0% P₂O₅、15% B₂O₃和 X% V₂O₅（X = 1、3 和 5）。建议使用五氧化二钒和氧化硼来降低生产熔化温度。为确认玻璃陶瓷的成分和无定形性质，使用了多种技术，包括 X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、热重仪 (TG)、能量色散光谱 (EDS) 和差热分析 (DTA)。所有样品均在 37 °C的模拟体液（SBF）溶液中培养 3、7、14 和 21 天，以确定它们在体外条件下的生物活性。X 射线衍射图显示结晶相形成不足，这可能是由于 V₂O₅ 抑制了磷灰石的生长并促进了无定形磷酸钙的形成。当磷灰石与硼结合时，玻璃陶瓷中的沉淀物显示出更高的晶格常数。SEM 图像显示，在 SBF 中浸泡 21 天后，表面出现沉淀并形成羟基磷灰石（HA）；EDS 分析证实了预期离子的存在。傅立叶变换红外分光光度计（FTIR）分析表明，玻璃陶瓷中的硅酸盐网络占主导地位，并在特定频率上出现了特征带。

{"title":"Incorporation of B and V oxides into bioactive glass by melt quenching: In vitro studies for bone regeneration applications","authors":"Anmar Fouad Kadhim Ibadi , A. Najah Saud , Alper Incesu","doi":"10.1016/j.matchemphys.2024.130096","DOIUrl":"10.1016/j.matchemphys.2024.130096","url":null,"abstract":"<div><div>In this study, glass-ceramics with a weight composition of 40-X% SiO₂, 24.5 % CaO, 14.5 % Na₂O, 6.0 % P₂O₅, 15 % B₂O₃, and X% V₂O₅ (X = 1, 3, and 5) were produced using the melt quenching method. Vanadium pentoxide and boron oxide were suggested to lower production melting temperatures. Several techniques were used to confirm the composition and amorphous nature of the glass-ceramics, including X-ray diffraction (XRD), scanning electron microscopy (SEM), thermogravimetry (TG), energy dispersive spectroscopy (EDS), and differential thermal analysis (DTA). All samples were incubated in simulated body fluid (SBF) solution at 37 °C for 3, 7, 14, and 21 days to determine their bioactivity under in vitro conditions. The XRD pattern indicates insufficient crystalline phase formation, possibly due to V₂O₅ inhibiting apatite growth and promoting amorphous calcium phosphate. Precipitates in the glass-ceramic show increased lattice constants when apatite combines with boron. SEM images reveal surface precipitation and the development of hydroxyapatite (HA) after 21 days of immersion in SBF; EDS analysis confirms the presence of the expected ions. The Fourier Transform Infrared Spectrophotometer (FTIR) analysis shows the dominance of the silicate network in the glass-ceramics, with characteristic bands at specific frequencies.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"329 ","pages":"Article 130096"},"PeriodicalIF":4.3,"publicationDate":"2024-10-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553779","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 dielectric performance of Y3Fe5O12 via incorporating LiFe5O8 thin film 通过加入 LiFe5O8 薄膜增强 Y3Fe5O12 的介电性能

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2024-10-29 DOI: 10.1016/j.matchemphys.2024.130102

Nan Shen, Cai-Yin You, Tejing Jiao, Na Tian, Heguang Liu, Jing Zhang

Y₃Fe₅O₁₂ (YIG) dielectric material has recently attracted much attention in microwave applications, where improving permittivity and reducing dielectric loss is crucial. In this work, the LiFe₅O₈/Y₃Fe₅O₁₂ (LFO/YIG) composite dielectric film was fabricated by the chemical solution deposition method. The introduction of LFO thin film into YIG formed defect dipoles and established an internal electric field, thus enhancing dielectric performance. The permittivity of the LFO/YIG composite film is 19.49 at 1 kHz, which is twice that of pure YIG film, and the dielectric loss is also reduced from 1.01 to 0.47. Meanwhile, the response characteristics of the composite film to the bias field exhibit asymmetric behavior. In comparison to the single YIG film, the LFO/YIG composite film shows good thermal stability.

最近，Y3Fe5O12（YIG）介电材料在微波应用中备受关注，因为在微波应用中，提高介电常数和降低介电损耗至关重要。本研究采用化学溶液沉积法制备了 LiFe5O8/Y3Fe5O12 （LFO/YIG）复合介质薄膜。在 YIG 中引入 LFO 薄膜可形成缺陷偶极子并建立内部电场，从而提高介电性能。LFO/YIG 复合薄膜在 1 kHz 时的介电系数为 19.49，是纯 YIG 薄膜的两倍，介电损耗也从 1.01 降至 0.47。同时，复合薄膜对偏压场的响应特性表现出不对称行为。与单一 YIG 薄膜相比，LFO/YIG 复合薄膜具有良好的热稳定性。

引用次数: 0

Flexible poly (ethylene-co-vinyl acetate)/copper oxide nanocomposites: A promising avenue for energy storage applications 柔性聚（乙烯-醋酸乙烯）/氧化铜纳米复合材料：一种前景广阔的储能应用途径

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2024-10-28 DOI: 10.1016/j.matchemphys.2024.130095

M. Shini , M.T. Ramesan

The use of metal oxide nanoparticles in polymeric materials to improve optical properties, dielectric constant, mechanical strength, and electrical conductivity has generated significant interest in fabricating flexible optoelectronic and energy storage devices. Herein, copper oxide (CuO) nanoparticle-reinforced poly (ethylene-co-vinyl acetate) (EVA) nanocomposites were prepared using a solvent-free two roll mill mixing method. Fourier transform infrared (FTIR) analysis reveals the distinct absorption peaks of CuO in the EVA matrix. The addition of CuO nanoparticles improved the crystallinity of EVA, as confirmed by X-ray diffraction (XRD). The addition of CuO to EVA led to an increase in the refractive index and a decrease in bandgap energy, as well as a broadening and intensification of UV–visible absorption, indicating strong interactions between CuO nanoparticles and the EVA matrix. Field emission scanning electron microscopy (FE-SEM) and high-resolution transmission electron microscopy (HR-TEM) revealed a homogeneous dispersion of CuO nanoparticles throughout the EVA matrix. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) demonstrated that the incorporation of CuO nanoparticles into EVA significantly enhanced its thermal properties. The electrical characteristics studies showed that the AC conductivity and dielectric constant of EVA increased significantly with increasing temperatures and CuO nanoparticle loading levels. EVA containing 5 wt% CuO exhibited the highest conductivity and the lowest activation energy. CuO nanoparticle reinforcement significantly enhanced the tensile, tear, and impact strength of EVA while reducing elongation at break up to a particular concentration. The nanocomposites containing 5 wt% CuO exhibited the highest tensile, tear resistance, and impact strengths, outperforming virgin EVA by 85 %, 103.6 %, and 83.16 %, respectively. These findings suggest that EVA/CuO nanocomposites are promising candidates for flexible dielectric materials.

在聚合物材料中使用金属氧化物纳米颗粒来改善光学性能、介电常数、机械强度和导电性能，已引起人们对制造柔性光电和储能设备的极大兴趣。本文采用无溶剂双辊研磨混合法制备了氧化铜（CuO）纳米粒子增强聚（乙烯-醋酸乙烯）（EVA）纳米复合材料。傅立叶变换红外（FTIR）分析显示 EVA 基体中的 CuO 有明显的吸收峰。经 X 射线衍射（XRD）证实，CuO 纳米粒子的加入提高了 EVA 的结晶度。在 EVA 中添加 CuO 会导致折射率增加、带隙能降低以及紫外可见吸收的扩大和增强，这表明 CuO 纳米粒子与 EVA 基体之间存在强烈的相互作用。场发射扫描电子显微镜（FE-SEM）和高分辨率透射电子显微镜（HR-TEM）显示，氧化铜纳米颗粒均匀地分散在整个 EVA 基体中。差示扫描量热法（DSC）和热重分析（TGA）表明，在 EVA 中加入 CuO 纳米粒子可显著提高其热学特性。电学特性研究表明，EVA 的交流电导率和介电常数随着温度和 CuO 纳米粒子含量的增加而显著提高。含 5 wt% CuO 的 EVA 具有最高的导电率和最低的活化能。CuO 纳米粒子增强显著提高了 EVA 的拉伸强度、撕裂强度和冲击强度，同时降低了特定浓度下的断裂伸长率。含 5 wt% CuO 的纳米复合材料表现出最高的拉伸强度、抗撕裂强度和冲击强度，分别比原始 EVA 高出 85%、103.6% 和 83.16%。这些研究结果表明，EVA/CuO 纳米复合材料有望成为柔性介电材料。

{"title":"Flexible poly (ethylene-co-vinyl acetate)/copper oxide nanocomposites: A promising avenue for energy storage applications","authors":"M. Shini , M.T. Ramesan","doi":"10.1016/j.matchemphys.2024.130095","DOIUrl":"10.1016/j.matchemphys.2024.130095","url":null,"abstract":"<div><div>The use of metal oxide nanoparticles in polymeric materials to improve optical properties, dielectric constant, mechanical strength, and electrical conductivity has generated significant interest in fabricating flexible optoelectronic and energy storage devices. Herein, copper oxide (CuO) nanoparticle-reinforced poly (ethylene-<em>co</em>-vinyl acetate) (EVA) nanocomposites were prepared using a solvent-free two roll mill mixing method. Fourier transform infrared (FTIR) analysis reveals the distinct absorption peaks of CuO in the EVA matrix. The addition of CuO nanoparticles improved the crystallinity of EVA, as confirmed by X-ray diffraction (XRD). The addition of CuO to EVA led to an increase in the refractive index and a decrease in bandgap energy, as well as a broadening and intensification of UV–visible absorption, indicating strong interactions between CuO nanoparticles and the EVA matrix. Field emission scanning electron microscopy (FE-SEM) and high-resolution transmission electron microscopy (HR-TEM) revealed a homogeneous dispersion of CuO nanoparticles throughout the EVA matrix. Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) demonstrated that the incorporation of CuO nanoparticles into EVA significantly enhanced its thermal properties. The electrical characteristics studies showed that the AC conductivity and dielectric constant of EVA increased significantly with increasing temperatures and CuO nanoparticle loading levels. EVA containing 5 wt% CuO exhibited the highest conductivity and the lowest activation energy. CuO nanoparticle reinforcement significantly enhanced the tensile, tear, and impact strength of EVA while reducing elongation at break up to a particular concentration. The nanocomposites containing 5 wt% CuO exhibited the highest tensile, tear resistance, and impact strengths, outperforming virgin EVA by 85 %, 103.6 %, and 83.16 %, respectively. These findings suggest that EVA/CuO nanocomposites are promising candidates for flexible dielectric materials.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"329 ","pages":"Article 130095"},"PeriodicalIF":4.3,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142560538","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

High entropy alloys: Next-generation material for space exploration 高熵合金：用于太空探索的新一代材料

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2024-10-28 DOI: 10.1016/j.matchemphys.2024.130091

Akriti Menon , Dipen Kumar Rajak , Dwesh Kumar Singh

High entropy materials (HEMs) have become a prominent research focus because of their remarkable properties, such as superior thermal stability, mechanical strength, and oxidation resistance, including High entropy alloys (HEAs), high-entropy polymers (HEPs), and high-entropy ceramics (HECs). These unique materials hold significant potential for advanced applications across leading industries, including aerospace, defense, military, biomedical, and chemical sectors. An overview of a diverse range of HEAs, their effects, classification, and various entropy alloy manufacturing techniques is presented to discover the optimized HEAs for significant applications particularly relevant to the aerospace industry. Their exceptional performance in the numerous fields of applications has made HEAs a promising alternative over solitary metals, alloys, and composites. Furthermore, it highlights numerous challenges faced in manufacturing. It presents a detailed analysis of the future scope of their development to enhance their applicability in aerospace and other high-demand fields.

高熵材料（HEMs）具有卓越的热稳定性、机械强度和抗氧化性等显著特性，包括高熵合金（HEAs）、高熵聚合物（HEPs）和高熵陶瓷（HECs），因此已成为一个突出的研究重点。这些独特的材料在航空航天、国防、军事、生物医学和化工等领先行业的先进应用中具有巨大潜力。本文概述了各种 HEA、其效果、分类和各种熵合金制造技术，以发现优化的 HEA，特别是与航空航天工业相关的重要应用。HEAs 在众多应用领域中的卓越性能，使其成为比单独金属、合金和复合材料更有前途的替代品。此外，报告还强调了在制造过程中面临的众多挑战。报告详细分析了未来的发展空间，以提高其在航空航天和其他高需求领域的适用性。

引用次数: 0

Nickel foam supported carbon nitride quantum dots as a sustainable catalyst for efficient electrocatalytic degradation of dyes 以泡沫镍为支撑的氮化碳量子点作为可持续催化剂实现染料的高效电催化降解

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2024-10-28 DOI: 10.1016/j.matchemphys.2024.130098

Anita B. Padasalagi , M.K. Rabinal

In electrocatalytic oxidation of organic dyes, requirement of higher overpotential for conventional electrodes limited its potential, which greatly encourages the look for highly active, energy efficient and stable materials. Herein, we demonstrated nickel foam supported carbon nitride quantum dots (CNQDs@NF) constructed through a simple hydrothermal approach, which could be considered as an energy efficient anode electrode for electrocatalytic process. The constructed 3D porous electrode exhibit a high activity towards the degradation of three hazardous dyes such as crystal violet, Rhodamine-B, and methyl orange. With an optimized oxidation current density of 4.2 mAcm⁻² and low energy consumption, 97 %, 98 %, and 99 % removal of Rhodamine-B, crystal violet, and methyl orange observed within 120 min. Moreover, no activity decay was noticed during 5 h, degradation efficiency remains almost same after 3 consecutive cycles. Further, proposed the mechanism involved in degradation process, demonstrated that, CNQDs@NF anode could create huge amount of hydroxyl radicals, which are contribute for oxidation of pollutants. This suggests that the CNQDs@NF electrodes exhibit both enhanced degradation and energy saving nature.

在有机染料的电催化氧化过程中，传统电极需要较高的过电位，这限制了其潜力，从而极大地促进了对高活性、高能效和稳定材料的研究。在此，我们展示了通过简单的水热法构建的泡沫镍支撑氮化碳量子点（CNQDs@NF），它可被视为电催化过程中的高能效阳极电极。所构建的三维多孔电极在降解水晶紫、罗丹明-B 和甲基橙等三种有害染料方面表现出很高的活性。在 4.2 mAcm-2 的优化氧化电流密度和低能耗条件下，120 分钟内罗丹明-B、结晶紫和甲基橙的去除率分别达到 97%、98% 和 99%。此外，5 小时内没有发现活性衰减，连续 3 个循环后降解效率几乎保持不变。此外，研究人员还提出了降解过程的机理，表明 CNQDs@NF 阳极可产生大量羟基自由基，从而促进污染物的氧化。这表明 CNQDs@NF 电极同时具有增强降解和节能的特性。

{"title":"Nickel foam supported carbon nitride quantum dots as a sustainable catalyst for efficient electrocatalytic degradation of dyes","authors":"Anita B. Padasalagi , M.K. Rabinal","doi":"10.1016/j.matchemphys.2024.130098","DOIUrl":"10.1016/j.matchemphys.2024.130098","url":null,"abstract":"<div><div>In electrocatalytic oxidation of organic dyes, requirement of higher overpotential for conventional electrodes limited its potential, which greatly encourages the look for highly active, energy efficient and stable materials. Herein, we demonstrated nickel foam supported carbon nitride quantum dots (CNQDs@NF) constructed through a simple hydrothermal approach, which could be considered as an energy efficient anode electrode for electrocatalytic process. The constructed 3D porous electrode exhibit a high activity towards the degradation of three hazardous dyes such as crystal violet, Rhodamine-B, and methyl orange. With an optimized oxidation current density of 4.2 mAcm<sup>−2</sup> and low energy consumption, 97 %, 98 %, and 99 % removal of Rhodamine-B, crystal violet, and methyl orange observed within 120 min. Moreover, no activity decay was noticed during 5 h, degradation efficiency remains almost same after 3 consecutive cycles. Further, proposed the mechanism involved in degradation process, demonstrated that, CNQDs@NF anode could create huge amount of hydroxyl radicals, which are contribute for oxidation of pollutants. This suggests that the CNQDs@NF electrodes exhibit both enhanced degradation and energy saving nature.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"329 ","pages":"Article 130098"},"PeriodicalIF":4.3,"publicationDate":"2024-10-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571553","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

Inhibiting the formation of interfacial voids in Cu/In/Cu microbump via Zn doping into Cu substrate 通过在铜衬底中掺入锌抑制 Cu/In/Cu 微凸块中界面空隙的形成

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2024-10-28 DOI: 10.1016/j.matchemphys.2024.130090

Ta-Wei Lin, Zih-You Wu, Yin-Ku Lee, Zi-Xu Chen, Tsong-Pyng Perng, Jenq-Gong Duh

To address warpage issues in 3D-IC, low temperature soldering technology such as Cu/In bonding has been developed in recent years. However, the formation of Kirkendall voids at the original Cu/In interface would lead to degradation of joint reliability. By adding Zn, the diffusional flux of Cu was inhibited, and the numbers of interfacial voids larger than 50 nm decreased substantially by 66 % at top interface and 58 % at bottom interface, respectively. In this study, Cu–15Zn/In/Cu system was investigated and could be regarded as a promising option for advanced electronic packaging in the future.

为解决 3D-IC 中的翘曲问题，近年来开发了低温焊接技术，如铜/铟接合。然而，在原来的 Cu/In 接口上形成的 Kirkendall 空洞会导致连接可靠性下降。加入 Zn 后，Cu 的扩散通量受到抑制，大于 50 nm 的界面空隙数量大幅减少，上界面减少了 66%，下界面减少了 58%。本研究对 Cu-15Zn/In/Cu 系统进行了研究，该系统可被视为未来先进电子封装的理想选择。

引用次数: 0

Photothermal and photodynamic responses of core-shell Mo₂C@C@Fucoidan nanospheres 核壳 Mo₂C@C@Fucoidan 纳米球的光热和光动力响应

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2024-10-26 DOI: 10.1016/j.matchemphys.2024.130088

Ayça Tunçel , Buse Sert , Derya Özel , Gul Kaya , Ersan Harputlu , Cumhur Gokhan Unlu , Kasim Ocakoglu , Fatma Yurt

Mo₂C structure, a transition metal carbide, is known for its exceptional properties including high chemical and thermal stability and surface activity. Recently, carbon-modified Mo₂C structures have found widespread applications due to their effectiveness. Here, we synthesized pomegranate-like Mo₂C@C nanospheres and coated them with poly(allylamine hydrochloride) (PAH) and fucoidan structures. Characterization techniques including FE-SEM, HR-TEM, XRD, XPS, and zeta potential analysis were employed. We investigated the effect of Mo2C@C@Fuc nanospheres by quantitatively evaluating their photothermal conversion efficiency. Under irradiation at wavelengths of 808 nm and 1064 nm with a power intensity of 2 W/cm², these nanospheres could convert up to 15 % of the incident laser energy into heat, outperforming conventional materials. Stability tests in various physiological pH environments confirmed their durability under NIR irradiation, ensuring operational integrity in biological environments. In addition, they showed significant efficiency in the production of singlet oxygen, making them promising agents for PDT. Biodegradation studies indicated safe degradation after therapeutic application, highlighting their environmental and physiological compatibility. Integrating Mo₂C@C@Fuc nanospheres into anticancer strategies combines the advantages of PTT and PDT, promising improved therapeutic outcomes with high biocompatibility.

Mo2C 结构是一种过渡金属碳化物，以其优异的性能而闻名，包括高化学稳定性、热稳定性和表面活性。最近，碳修饰的 Mo2C 结构因其有效性而得到广泛应用。在此，我们合成了石榴状 Mo2C@C 纳米球，并在其表面涂覆了聚（烯丙胺盐酸盐）（PAH）和褐藻糖胶结构。表征技术包括 FE-SEM、HR-TEM、XRD、XPS 和 zeta 电位分析。我们通过定量评估 Mo2C@C@Fuc 纳米球的光热转换效率来研究其效果。在波长为 808 nm 和 1064 nm、功率强度为 2 W/cm2 的激光照射下，这些纳米球可将高达 15% 的入射激光能量转化为热量，优于传统材料。在各种生理酸碱度环境下进行的稳定性测试证实了它们在近红外辐照下的耐久性，从而确保了在生物环境中的操作完整性。此外，它们在产生单线态氧方面表现出显著的效率，使其成为有前途的光导治疗剂。生物降解研究表明，它们在治疗应用后可安全降解，突出了它们在环境和生理方面的兼容性。将 Mo2C@C@Fuc 纳米球融入抗癌策略中，结合了 PTT 和 PDT 的优势，有望改善治疗效果并具有高度的生物兼容性。

{"title":"Photothermal and photodynamic responses of core-shell Mo₂C@C@Fucoidan nanospheres","authors":"Ayça Tunçel , Buse Sert , Derya Özel , Gul Kaya , Ersan Harputlu , Cumhur Gokhan Unlu , Kasim Ocakoglu , Fatma Yurt","doi":"10.1016/j.matchemphys.2024.130088","DOIUrl":"10.1016/j.matchemphys.2024.130088","url":null,"abstract":"<div><div>Mo<sub>2</sub>C structure, a transition metal carbide, is known for its exceptional properties including high chemical and thermal stability and surface activity. Recently, carbon-modified Mo<sub>2</sub>C structures have found widespread applications due to their effectiveness. Here, we synthesized pomegranate-like Mo<sub>2</sub>C@C nanospheres and coated them with poly(allylamine hydrochloride) (PAH) and fucoidan structures. Characterization techniques including FE-SEM, HR-TEM, XRD, XPS, and zeta potential analysis were employed. We investigated the effect of Mo2C@C@Fuc nanospheres by quantitatively evaluating their photothermal conversion efficiency. Under irradiation at wavelengths of 808 nm and 1064 nm with a power intensity of 2 W/cm<sup>2</sup>, these nanospheres could convert up to 15 % of the incident laser energy into heat, outperforming conventional materials. Stability tests in various physiological pH environments confirmed their durability under NIR irradiation, ensuring operational integrity in biological environments. In addition, they showed significant efficiency in the production of singlet oxygen, making them promising agents for PDT. Biodegradation studies indicated safe degradation after therapeutic application, highlighting their environmental and physiological compatibility. Integrating Mo<sub>2</sub>C@C@Fuc nanospheres into anticancer strategies combines the advantages of PTT and PDT, promising improved therapeutic outcomes with high biocompatibility.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"329 ","pages":"Article 130088"},"PeriodicalIF":4.3,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142560539","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

Effect of crystallographic texture and grain orientation on tribological properties of WAAM deposited IN625 alloy in weaving deposition strategy 织构沉积策略下 WAAM 沉积 IN625 合金的结晶纹理和晶粒取向对其摩擦学特性的影响

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2024-10-26 DOI: 10.1016/j.matchemphys.2024.130089

Gaurav Kishor , Krishna Kishore Mugada , Raju Prasad Mahto , Aravindan Sivanandam , D. Ravi Kumar , Murugaiyan Amirthalingam

Understanding the variation in the local microstructure and texture of the as-built fabricated by wire arc additive manufacturing (WAAM) is highly challenging. They affect the mechanical and tribological properties of the builds. The deposition patterns and the process parameters are key factors that determine the microstructures and hence other properties. In the present study, builds of Inconel 625 alloy have been manufactured through WAAM by using a weaving pattern. The microstructure and their texture at the different locations of the deposited build have been investigated through electron backscattered diffraction (EBSD) and optical microscopy. The detailed evolution mechanisms of the micro-structure of the build have been studied followed by the quantitative analysis of the grain size, misorientation angles, fraction of recrystallized and deformed grains, and textures. Later the effect of texture components on the hardness, elastic modulus, and coefficient of friction (COF) of the build has been studied by using nano-indetation and nano-scratch tests. The grain size was found to be 33 μm, 110 μm, and 66 μm at the bottom, middle, and top, respectively. The top region was dominated by Cube {001}<uvw>, Goss {011}<100>, and E {111}<110> orientations, which changed to deformed texture Brass {110}<112> and Goss {011}<100> orientations in the middle region and cube texture at the bottom. Hardness was highest at the top region 5.33 GPa, followed by 4.02 GPa in the middle region and 4.74 GPa at the bottom. The COF was highest in the middle region at 0.456, which reduced to 0.323 in the bottom region. Sheared textured grains {111}<uvw> have shown greater value of COF and hardness than the {101}< uvw> and {100}<uvw> texture grains. The study has been carried out to investigate the variation in local mechanical properties due to microstructural variations. It will help industries to design components with homogeneous mechanical properties.

了解线弧增材制造（WAAM）坯件局部微观结构和纹理的变化极具挑战性。它们会影响成品的机械和摩擦学特性。沉积模式和工艺参数是决定微观结构和其他性能的关键因素。在本研究中，使用编织模式通过 WAAM 制造了 Inconel 625 合金的构建体。通过电子反向散射衍射（EBSD）和光学显微镜研究了沉积构建体不同位置的微观结构及其纹理。研究了构建物微观结构的详细演变机制，随后对晶粒大小、错位角、再结晶和变形晶粒的比例以及纹理进行了定量分析。随后，通过纳米压痕和纳米划痕测试，研究了纹理成分对构建物的硬度、弹性模量和摩擦系数（COF）的影响。结果发现，底部、中部和顶部的晶粒大小分别为 33 μm、110 μm 和 66 μm。顶部区域以立方体{001}<uvw>、高斯{011}<100>和E{111}<110>取向为主，在中间区域转变为变形纹理黄铜{110}<112>和高斯{011}<100>取向，底部则为立方体纹理。硬度最高的是顶部区域的 5.33 GPa，其次是中部区域的 4.02 GPa 和底部区域的 4.74 GPa。中间区域的 COF 值最高，为 0.456，底部区域降至 0.323。与{101}<uvw>和{100}<uvw>纹理晶粒相比，剪切纹理晶粒{111}<uvw>显示出更高的 COF 值和硬度。这项研究旨在调查微观结构变化导致的局部机械性能变化。这将有助于工业设计具有均匀机械性能的部件。

{"title":"Effect of crystallographic texture and grain orientation on tribological properties of WAAM deposited IN625 alloy in weaving deposition strategy","authors":"Gaurav Kishor , Krishna Kishore Mugada , Raju Prasad Mahto , Aravindan Sivanandam , D. Ravi Kumar , Murugaiyan Amirthalingam","doi":"10.1016/j.matchemphys.2024.130089","DOIUrl":"10.1016/j.matchemphys.2024.130089","url":null,"abstract":"<div><div>Understanding the variation in the local microstructure and texture of the as-built fabricated by wire arc additive manufacturing (WAAM) is highly challenging. They affect the mechanical and tribological properties of the builds. The deposition patterns and the process parameters are key factors that determine the microstructures and hence other properties. In the present study, builds of Inconel 625 alloy have been manufactured through WAAM by using a weaving pattern. The microstructure and their texture at the different locations of the deposited build have been investigated through electron backscattered diffraction (EBSD) and optical microscopy. The detailed evolution mechanisms of the micro-structure of the build have been studied followed by the quantitative analysis of the grain size, misorientation angles, fraction of recrystallized and deformed grains, and textures. Later the effect of texture components on the hardness, elastic modulus, and coefficient of friction (COF) of the build has been studied by using nano-indetation and nano-scratch tests. The grain size was found to be 33 μm, 110 μm, and 66 μm at the bottom, middle, and top, respectively. The top region was dominated by Cube {001}<uvw>, Goss {011}<100>, and E {111}<110> orientations, which changed to deformed texture Brass {110}<112> and Goss {011}<100> orientations in the middle region and cube texture at the bottom. Hardness was highest at the top region 5.33 GPa, followed by 4.02 GPa in the middle region and 4.74 GPa at the bottom. The COF was highest in the middle region at 0.456, which reduced to 0.323 in the bottom region. Sheared textured grains {111}<uvw> have shown greater value of COF and hardness than the {101}< uvw> and {100}<uvw> texture grains. The study has been carried out to investigate the variation in local mechanical properties due to microstructural variations. It will help industries to design components with homogeneous mechanical properties.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"329 ","pages":"Article 130089"},"PeriodicalIF":4.3,"publicationDate":"2024-10-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142571549","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

Evaluation of optical, thermal and hydrophobic properties of sustainable stilbene-based benzoxazines for high-performance utilization 评估可持续苯乙烯基苯并恶嗪的光学、热学和疏水性，以实现高性能利用

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2024-10-25 DOI: 10.1016/j.matchemphys.2024.130078

Subasri Appasamy, Balaji Krishnasamy, Alagar Muthukaruppan

Currently there is a growing interest in the field of photosensitive benzoxazines synthesized from sustainable raw materials. An attempt has been made to synthesize nine structurally different benzoxazines through Mannich condensation reaction. The formation of the expected structure of the synthesized benzoxazine monomers were ascertained using spectroscopic methods. The ring-opening polymerization of benzoxazines was studied using DSC and found that THS-imp benzoxazine monomer exhibits the lowest value of curing temperature (T_p) of 179^oC than the rest of the benzoxazine monomers. Thermal stability of polybenzoxazines were analyzed using thermogravimetric analyzer. Among the different polybenzoxazines studied, poly(THS-a) possesses the higher thermal stability with char yield of 53 % than that of other benzoxazines. The band gap values of benzoxazines calculated from optical studies are ranged between 3.92 and 4.71 eV. The hydrophobic behavior of the polybenzoxazines assessed using the water contact angle obtained from goniometer for both neat polymer matrix and benzoxazine coated cotton fabric. Results from the water contact angle infer that the benzoxazines coated cotton fabric exhibited 152°, which shows the superhydrophobic behavior. The corrosion resistant properties of all the polybenzoxazines coated over MS specimen has been tested. Among them poly(THS-pfsa) and poly(THS-imp) have higher I_corr value and corrosion inhibition efficiency of 99 %. Data obtained from different studies indicate that the benzoxazines developed from sustainable stilbene can be utilized in the form of coatings, adhesives, sealants, and matrices for composites for wide range of industrial and engineering applications, where high thermal stability and are required.

目前，人们对利用可持续原材料合成光敏苯并噁嗪的兴趣与日俱增。我们尝试通过曼尼希缩合反应合成了九种结构不同的苯并噁嗪。利用光谱方法确定了合成苯并恶嗪单体的预期结构。利用 DSC 对苯并恶嗪的开环聚合进行了研究，结果发现 THS-imp 苯并恶嗪单体的固化温度（Tp）为 179 摄氏度，比其他苯并恶嗪单体的固化温度（Tp）最低。使用热重分析仪分析了聚苯并恶嗪的热稳定性。在所研究的各种聚苯并噁嗪中，聚（THS-a）的热稳定性较高，其炭化率为 53%，高于其他苯并噁嗪。通过光学研究计算得出的苯并噁嗪的带隙值介于 3.92 和 4.71 eV 之间。利用测角仪获得的水接触角评估了纯聚合物基体和涂有苯并噁嗪的棉织物的聚苯并噁嗪的疏水性。水接触角结果表明，涂有苯并恶嗪的棉织物具有 152°的超疏水性。测试了所有涂覆在 MS 试样上的聚苯并噁嗪的耐腐蚀性能。其中聚（THS-pfsa）和聚（THS-imp）的 Icorr 值较高，缓蚀效率达到 99%。从不同研究中获得的数据表明，利用可持续二苯乙烯开发的苯并恶嗪可以用作涂料、粘合剂、密封剂和复合材料基材，广泛应用于需要高热稳定性的工业和工程领域。

{"title":"Evaluation of optical, thermal and hydrophobic properties of sustainable stilbene-based benzoxazines for high-performance utilization","authors":"Subasri Appasamy, Balaji Krishnasamy, Alagar Muthukaruppan","doi":"10.1016/j.matchemphys.2024.130078","DOIUrl":"10.1016/j.matchemphys.2024.130078","url":null,"abstract":"<div><div>Currently there is a growing interest in the field of photosensitive benzoxazines synthesized from sustainable raw materials. An attempt has been made to synthesize nine structurally different benzoxazines through Mannich condensation reaction. The formation of the expected structure of the synthesized benzoxazine monomers were ascertained using spectroscopic methods. The ring-opening polymerization of benzoxazines was studied using DSC and found that THS-imp benzoxazine monomer exhibits the lowest value of curing temperature (T<sub>p</sub>) of 179<sup>o</sup>C than the rest of the benzoxazine monomers. Thermal stability of polybenzoxazines were analyzed using thermogravimetric analyzer. Among the different polybenzoxazines studied, poly(THS-a) possesses the higher thermal stability with char yield of 53 % than that of other benzoxazines. The band gap values of benzoxazines calculated from optical studies are ranged between 3.92 and 4.71 eV. The hydrophobic behavior of the polybenzoxazines assessed using the water contact angle obtained from goniometer for both neat polymer matrix and benzoxazine coated cotton fabric. Results from the water contact angle infer that the benzoxazines coated cotton fabric exhibited 152°, which shows the superhydrophobic behavior. The corrosion resistant properties of all the polybenzoxazines coated over MS specimen has been tested. Among them poly(THS-pfsa) and poly(THS-imp) have higher I<sub>corr</sub> value and corrosion inhibition efficiency of 99 %. Data obtained from different studies indicate that the benzoxazines developed from sustainable stilbene can be utilized in the form of coatings, adhesives, sealants, and matrices for composites for wide range of industrial and engineering applications, where high thermal stability and are required.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"329 ","pages":"Article 130078"},"PeriodicalIF":4.3,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553778","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

Effect of ultrasonic surface rolling process by disparate static pressure on a carburized layer of 17CrNiMo6 steel 不同静压的超声波表面滚压工艺对 17CrNiMo6 钢渗碳层的影响

IF 4.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Chemistry and Physics

Pub Date : 2024-10-25 DOI: 10.1016/j.matchemphys.2024.130086

Shuo Wang , Pingtuan Wang , Xiufang Cui , Guo Jin , Jian Li , Yuting Hu , Yufei Liu , Zilong Wu , Shengming Wu

Considering the elevated application requirements for transmission gears in terms of wear and corrosion resistance, this study investigates the impact of different static pressures (0.4 MPa, 0.6 MPa, 0.8 MPa) on the structure and protective properties of vacuum-carburized USRP layers, leveraging the technical advantages offered by vacuum carburizing and USRP. The findings demonstrate that using USRP facilitates fine-grained strengthening, and the thickness of the grain refinement layer increases proportionally with static pressure. The 0.6 MPa static pressure exhibits the most pronounced positive impact on grain refinement. The application of varying static pressures results in different surface integrity and microhardness levels within the carburized layer, thereby impacting the layer's wear and corrosion resistance. The coating exhibits the highest hardness and lowest roughness at a static pressure of 0.6 MPa, thereby demonstrating superior wear resistance. In addition, the 0.6 MPa layer with the lowest roughness has the best corrosion resistance.

考虑到传动齿轮在耐磨性和耐腐蚀性方面的应用要求较高，本研究利用真空渗碳和 USRP 的技术优势，研究了不同静压（0.4 兆帕、0.6 兆帕、0.8 兆帕）对真空渗碳 USRP 层的结构和保护性能的影响。研究结果表明，使用 USRP 可促进细晶粒强化，晶粒细化层的厚度随静压成比例增加。0.6 兆帕的静压对晶粒细化的积极影响最为明显。施加不同的静压会导致渗碳层的表面完整性和微硬度水平不同，从而影响渗碳层的耐磨性和耐腐蚀性。在静压为 0.6 兆帕时，涂层的硬度最高，粗糙度最低，从而显示出卓越的耐磨性。此外，粗糙度最低的 0.6 兆帕涂层具有最佳的耐腐蚀性。

{"title":"Effect of ultrasonic surface rolling process by disparate static pressure on a carburized layer of 17CrNiMo6 steel","authors":"Shuo Wang , Pingtuan Wang , Xiufang Cui , Guo Jin , Jian Li , Yuting Hu , Yufei Liu , Zilong Wu , Shengming Wu","doi":"10.1016/j.matchemphys.2024.130086","DOIUrl":"10.1016/j.matchemphys.2024.130086","url":null,"abstract":"<div><div>Considering the elevated application requirements for transmission gears in terms of wear and corrosion resistance, this study investigates the impact of different static pressures (0.4 MPa, 0.6 MPa, 0.8 MPa) on the structure and protective properties of vacuum-carburized USRP layers, leveraging the technical advantages offered by vacuum carburizing and USRP. The findings demonstrate that using USRP facilitates fine-grained strengthening, and the thickness of the grain refinement layer increases proportionally with static pressure. The 0.6 MPa static pressure exhibits the most pronounced positive impact on grain refinement. The application of varying static pressures results in different surface integrity and microhardness levels within the carburized layer, thereby impacting the layer's wear and corrosion resistance. The coating exhibits the highest hardness and lowest roughness at a static pressure of 0.6 MPa, thereby demonstrating superior wear resistance. In addition, the 0.6 MPa layer with the lowest roughness has the best corrosion resistance.</div></div>","PeriodicalId":18227,"journal":{"name":"Materials Chemistry and Physics","volume":"329 ","pages":"Article 130086"},"PeriodicalIF":4.3,"publicationDate":"2024-10-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142553777","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