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Characterization of Pulse Electrodeposited Ni-SiC Nanocomposite Coating on Four Stroke Internal Combustion Engine Cast Iron Cylinder Liner 四冲程内燃机铸铁气缸套脉冲电沉积 Ni-SiC 纳米复合涂层的表征
IF 2.8 3区 材料科学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2024-09-21 DOI: 10.1007/s12633-024-03145-y
P. Natarajan, P. Sakthivel, V. Vijayan, K. Chellamuthu

Nickel silicon carbide (Ni-SiC) nanocomposite coatings are extensively used in the engineering field due to their exceptional mechanical characteristics. In this study, pulsed electrodeposition from a nickel Watts bath on a cast iron (CI) cylinder liner produced a Ni-SiC nanocomposite coating. The current study concentrated on multi-objective optimization to maximize microhardness and minimize surface roughness of the composite coating by grey relational analysis (GRA) and the contribution of coating parameters was analyzed by analysis of variance (ANOVA). The GRA-ANOVA-ANOVAt shows that the effects of the square term of duty cycle (Y2), the linear term of current density (Z), and the square term of frequency (X2) are most significant and affect the coating characteristics at a 95% confidence level. The inclusion of SiC particles altered the preferred coating crystallographic orientation from (200) to (111). The optimal coating parameters of frequency 100 Hz, duty cycle 80%, and current density 0.5 A/cm2 produced the best mechanical properties for Ni (79.38 wt%), Si (0.76 wt%), and C (19.86 wt%). According to the ANOVA, the linear term of current density (Z) and the quadratic terms of duty cycle (Y2) and frequency (X) have a significant influencing role with contributions of 27.74, 24.18, and 22.90%, respectively. EDX analysis of the Ni-SiC coating showed that carbon is the dominant element, comprising 54.52 wt. % and 19.86 wt. %, followed by nickel and silicon.

镍碳化硅(Ni-SiC)纳米复合涂层因其卓越的机械特性而被广泛应用于工程领域。在本研究中,在铸铁(CI)气缸套上从镍瓦特浴中进行脉冲电沉积,生成了镍碳化硅(Ni-SiC)纳米复合涂层。本研究通过灰色关系分析(GRA)对复合涂层的显微硬度最大化和表面粗糙度最小化进行了多目标优化,并通过方差分析(ANOVA)分析了涂层参数的贡献。GRA-ANOVA-ANOVAt 显示,在 95% 的置信水平下,占空比平方项 (Y2)、电流密度线性项 (Z) 和频率平方项 (X2) 对涂层特性的影响最为显著。加入碳化硅颗粒后,涂层的优先晶向从(200)变为(111)。在频率为 100 Hz、占空比为 80%、电流密度为 0.5 A/cm2 的最佳镀膜参数下,镍(79.38 wt%)、硅(0.76 wt%)和碳(19.86 wt%)的机械性能最佳。根据方差分析,电流密度(Z)的线性项以及占空比(Y2)和频率(X)的二次项具有显著的影响作用,贡献率分别为 27.74%、24.18% 和 22.90%。对 Ni-SiC 涂层的 EDX 分析表明,碳是主要元素,占 54.52% 和 19.86%,其次是镍和硅。
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引用次数: 0
Linear and Nonlinear Optical Characteristics of Bismuth-Modified Lead-Silicate Glasses 铋改性硅酸铅玻璃的线性和非线性光学特性
IF 2.8 3区 材料科学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2024-09-19 DOI: 10.1007/s12633-024-03139-w
Rajni Bala, Sujata Sanghi, Ashish Agarwal, Saroj Rani, Sanjay Gaur

Bismuth-modified lead silicate glasses with composition 20PbO∙(80-x)Bi2O3∙xSiO2 (10 ≤ x ≤ 40 mol%) were fabricated by classical melt-quench technique. The density (D), crystalline volume (VC), and molar volume (VM) values decrease with a decrease in bismuth concentration. FTIR spectra suggest the formation of [BiO3], [BiO6], [SiO4], [PbO3], and [PbO4] structural units. The optical band gap (Eg) values for the studied glass composition are determined to be between 1.93 and 2.12 eV, while their Urbach energy (∆E) values fall between 0.14 and 0.24 eV. A decrease in values of average electronic oxide polarizability (2.84‒1.62 Å3), and optical basicity (1.08‒0.64), predict the increase in the covalence nature of the Bi-O bond with the incorporation of SiO2 in the glass network. The small metallization criterion (0.311 to 0.325) predicts the suitability of the prepared series to be utilized as nonlinear optical materials. The Z-scan approach was utilized to determine the third-order nonlinear optical characteristics, including the nonlinear absorption coefficient (α2), nonlinear susceptibility (χ(3)), and nonlinear refractive index (η2). Optical studies reveal that with the decrease in Bi2O3 content, nonbridging oxygens (NBOs) decrease leads to an increase in bandgap and a drop in the nonlinear refractive index. The dynamic range (DR) and limiting threshold values have also been reported from the optical limiting studies of the prepared glasses.

采用经典的熔融-淬火技术制备了铋改性硅酸铅玻璃,其成分为 20PbO∙(80-x)Bi2O3∙xSiO2 (10 ≤ x ≤ 40 mol%)。密度(D)、结晶体积(VC)和摩尔体积(VM)值随铋浓度的降低而降低。傅立叶变换红外光谱表明形成了[BiO3]、[BiO6]、[SiO4]、[PbO3]和[PbO4]结构单元。所研究的玻璃成分的光带隙(Eg)值在 1.93 至 2.12 eV 之间,而它们的厄巴赫能(ΔE)值在 0.14 至 0.24 eV 之间。平均电子氧化物极化率(2.84-1.62 Å3)和光学碱度(1.08-0.64)值的降低预示着玻璃网络中 SiO2 的加入会增加 Bi-O 键的共价性质。小金属化标准(0.311 至 0.325)预示着所制备系列适合用作非线性光学材料。利用 Z 扫描方法确定了三阶非线性光学特性,包括非线性吸收系数 (α2)、非线性电感 (χ(3)) 和非线性折射率 (η2)。光学研究表明,随着 Bi2O3 含量的减少,非桥氧原子(NBOs)的减少导致带隙增大,非线性折射率下降。制备的玻璃的光学极限研究还报告了动态范围(DR)和极限阈值。
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引用次数: 0
Structure and Density Heterogeneities of Silica Glass: Insight from Datamining Techniques 硅玻璃的结构和密度异质性:数据挖掘技术的启示
IF 2.8 3区 材料科学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2024-09-19 DOI: 10.1007/s12633-024-03148-9
Nguyen Van Hong

In this study, we used computer simulations of molecular dynamics to investigate structure and density heterogeneities of silica glass at glass transition temperature, 1475 K. We employed machine learning and data analysis techniques to gain a detailed understanding of the atomic-level structure of the silica glass. The investigation found that the network structure of the silica glass is composed of clusters with varying structures and densities. This structural heterogeneity with clusters is similar to the grains seen in polycrystalline materials. This observation indicates that silica glass can exist in multiple amorphous structural forms, analogous to polymorphism in crystalline materials. Additionally, we applied detailed 3D visualizations to effectively represent the structural characteristics of the silica glass. These visualizations provided valuable insights into the complex and heterogeneous nature of the silica network.

在这项研究中,我们利用分子动力学计算机模拟来研究玻璃转化温度(1475 K)下二氧化硅玻璃的结构和密度异质性。调查发现,二氧化硅玻璃的网络结构由结构和密度各不相同的簇组成。这种结构上的异质性与多晶材料中的晶粒相似。这一观察结果表明,硅玻璃可以多种非晶结构形式存在,类似于晶体材料中的多晶体。此外,我们还应用了详细的三维可视化技术,以有效呈现硅玻璃的结构特征。这些可视化技术为了解二氧化硅网络的复杂性和异质性提供了宝贵的见解。
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引用次数: 0
Role of Silicon in Providing Defence Against Insect Herbivory in Sugarcane Production 硅在甘蔗生产中防御昆虫草食性的作用
IF 2.8 3区 材料科学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2024-09-18 DOI: 10.1007/s12633-024-03144-z
Priya, Rajinder Kumar

Silicon (Si) is essential to the nutritional status of many monocot and dicot plant species, and it aids them in resisting abiotic and biotic challenges in various ways. This article explained the progress in exploring silicon-mediated resistance to sugarcane insect pests, its role in increasing juice quality attributes and cane production, the silicon status of soil and uptake by sugarcane plant, and the mechanisms involved. The aim is to determine the influence of different sources of Si application on the availability of silicon in soil, silicon uptake by plants, silicon effect in minimizing biotic stresses such as defence against sugarcane insect pest herbivory along with its effect on sugarcane yield in terms of juice and other component traits. There are two basic modes of action: enhanced physical or mechanical barriers and biochemical or molecular mechanisms that activate plant defence responses via bitrophic (plant-herbivore) interactions and tritrophic (plant-herbivore-natural enemy) interactions. By integrating the data reported in this research, a comprehensive understanding of the relationship between various sources of silicon treatments, increased sugarcane plant resistance and decreased sugarcane insect pest damage might be attained.

硅(Si)对许多单子叶和双子叶植物物种的营养状况至关重要,并能以各种方式帮助它们抵抗非生物和生物挑战。本文阐述了在探索硅介导的甘蔗虫害抗性方面取得的进展、硅在提高果汁质量属性和甘蔗产量方面的作用、土壤中硅的状况和甘蔗植物对硅的吸收以及相关机制。研究的目的是确定施用不同来源的硅对土壤中硅的可用性、植物对硅的吸收、硅在减少生物胁迫(如抵御甘蔗虫害)方面的作用,以及硅对甘蔗果汁和其他成分性状产量的影响。有两种基本的作用模式:增强物理或机械屏障,以及通过位营养(植物-食草动物)相互作用和三营养(植物-食草动物-天敌)相互作用激活植物防御反应的生化或分子机制。通过整合本研究中报告的数据,可以全面了解各种硅处理来源、甘蔗植物抗性增强和甘蔗虫害减少之间的关系。
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引用次数: 0
Synthesis of a Novel Modified Polysiloxane Filtrate Reducer and its Application in Water-Based Drilling Fluids 新型改性聚硅氧烷降滤剂的合成及其在水基钻井液中的应用
IF 2.8 3区 材料科学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2024-09-18 DOI: 10.1007/s12633-024-03141-2
Ling Lin, Ren Ren, Yulong Bai, Hongdan Ao, Pingya Luo

Deep and ultra-deep oil and gas resources have considerable potential and are now the primary resources to be explored and developed. However, the formation conditions get more harsh and challenging as the drilling depth increases. At 150°C, the majority of natural polymers start to degrade thermally, whereas synthetic polymers perform exceptionally well under even higher temperatures. Based on the excellent thermal stability of polysiloxane in other research areas, a modified siloxane monomer (F-PDMS) was synthesized and copolymerized with acrylamide (AM), 2-acrylamido-2-methylpropane sulfonic acid (AMPS) and N-vinyl caprolactam (NVCL) to prepare a novel modified polysiloxane filtrate reducer (F-LS) with high-temperature resistance. The structure of products was characterized by Fourier transform infrared spectroscopy and the proton nuclear magnetic resonance, and their thermal stability was investigated using thermogravimetry. Furthermore, the rheological properties, filtration reduction, and inhibition performance of F-LS in base mud were evaluated. The results showed that after rolling at 220°C for 16 h, the API (American Petroleum Institute) filtrate loss (ambient temperature, 0.69 MPa) of 1% F-LS was only 8.8 mL, and the high-temperature (220 °C) and high-pressure (3.5 MPa) filtration was 26.8 mL, and the linear swelling rate of API filtrate liquid was dropped from 12.57% to 9.74%. Compared to Driscald and Polydrill, the effectiveness of filtrate loss reduction of F-LS was superior. The filtration control mechanism of F-LS was revealed based on the scanning electron microscopy analysis, particle size analysis, and Zeta potential test. F-LS could absorb on the clay surface and cover the pores on the surface of filter cake, and make the latter more condensed. Particularly, F-LS increased the absolute value of Zeta potential of clay particles, thus increasing their double-layer repulsion, and hydration film thickness, maintaining the proportion of submicron particles, thereby improving the stability of rheology and filtration of drilling fluids under harsh conditions.

Graphical Abstract

深层和超深层油气资源潜力巨大,是目前需要勘探和开发的主要资源。然而,随着钻井深度的增加,地层条件变得更加苛刻和具有挑战性。当温度达到 150°C 时,大多数天然聚合物开始热降解,而合成聚合物在更高的温度下也表现优异。基于聚硅氧烷在其他研究领域的优异热稳定性,我们合成了一种改性硅氧烷单体(F-PDMS),并将其与丙烯酰胺(AM)、2-丙烯酰胺基-2-甲基丙烷磺酸(AMPS)和 N-乙烯基己内酰胺(NVCL)共聚,制备出一种具有耐高温性能的新型改性聚硅氧烷滤液减阻剂(F-LS)。傅立叶变换红外光谱和质子核磁共振对产品的结构进行了表征,热重法对其热稳定性进行了研究。此外,还评估了 F-LS 的流变性能、降滤性能以及在基泥中的抑制性能。结果表明,1%的F-LS在220℃下滚动16小时后,API(美国石油协会)滤液损失(环境温度,0.69 MPa)仅为8.8 mL,高温(220℃)高压(3.5 MPa)过滤为26.8 mL,API滤液的线性膨胀率从12.57%降至9.74%。与 Driscald 和 Polydrill 相比,F-LS 减少滤液损失的效果更佳。通过扫描电子显微镜分析、粒度分析和 Zeta 电位测试,揭示了 F-LS 的过滤控制机理。F-LS 能吸附在粘土表面,覆盖滤饼表面的孔隙,使滤饼更加凝结。特别是 F-LS 增加了粘土颗粒 Zeta 电位的绝对值,从而增加了粘土颗粒的双层斥力和水化膜厚度,保持了亚微米颗粒的比例,从而提高了钻井液在苛刻条件下流变性和过滤的稳定性。
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引用次数: 0
Assessment of Trap Charges for Analog/RF FOMs and Linearity Behaviour on InAs Based Dual Metal Hetero Gate Oxide TFET for Enhanced Reliability 评估模拟/射频 FOM 的陷波电荷以及基于 InAs 的双金属异质栅极氧化物 TFET 的线性行为,以提高可靠性
IF 2.8 3区 材料科学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2024-09-17 DOI: 10.1007/s12633-024-03137-y
Vedvrat

The aim of this study is to examine a low-power, InAs/Si hetero-gate oxide double-gate Tunnel field effect transistor (H-DM-DG-InAs-TFET) for high frequency application and to determine how trap charges (ITCs) affect the DC characteristics and analog/RF electrical performance metrics of the device. It is unfeasible to disregard the trap charges because the device's performance and reliability are negatively impacted by the buildup of trap charges at the interface between the semiconductor and oxide. Hence, an in-depth analysis of the performance characteristics of the proposed device, a InAs/Si hetero-gate oxide double-gate Tunnel FET (H-DM-DG-InAs-TFET), is conducted in this work to ascertain the impact of interface trap charges (ITCs). Comparison study of proposed device with dual metal gate Si Tunnel Field Effect Transistor (DM-DG-Si-TFET) is conducted. The proposed device is capable of effortlessly carrying enhanced ON current (1.54 × 10–3 A/µm) and exhibits improved current ratio (1.63 × 1011). To ascertain the device's suitability for low-power applications, its threshold voltage is determined by employing a constant current methodology. An improvement in threshold voltage (0.17 V) is noted. According to the study, the efficacy of the proposed device was enhanced due to the dielectric engineering performed on the oxide layer. Further investigation is conducted into the impact of ITCs on linearity parameters, as advanced communication device necessitates linear responses. The comparison with the DM-DG-Si-TFET reveals that the proposed TFET has virtually no distortion and a negligible impact on the linearity metrics. This indicates that the proposed TFET can be utilised in extremely low-power, high-frequency electrical devices.

本研究的目的是检验一种用于高频应用的低功耗 InAs/Si 异质栅氧化物双栅隧道场效应晶体管 (H-DM-DG-InAs-TFET),并确定陷阱电荷 (ITC) 如何影响器件的直流特性和模拟/射频电气性能指标。不考虑阱电荷是不可行的,因为半导体和氧化物之间的界面上积累的阱电荷会对器件的性能和可靠性产生负面影响。因此,本研究对所提出的 InAs/Si 异质栅氧化物双栅隧道场效应晶体管(H-DM-DG-InAs-TFET)的性能特性进行了深入分析,以确定界面陷阱电荷(ITC)的影响。还对所提出的器件与双金属栅硅隧道场效应晶体管(DM-DG-Si-TFET)进行了比较研究。所提出的器件能够毫不费力地承载更强的导通电流(1.54 × 10-3 A/µm),并显示出更高的电流比(1.63 × 1011)。为确定该器件是否适用于低功耗应用,采用恒流方法确定了其阈值电压。结果表明,阈值电压有所提高(0.17 V)。研究结果表明,由于在氧化层上实施了介电工程,该器件的功效得到了提高。由于先进的通信设备需要线性响应,因此进一步研究了 ITC 对线性参数的影响。与 DM-DG-Si-TFET 的比较显示,所提出的 TFET 几乎没有失真,对线性度指标的影响可以忽略不计。这表明拟议的 TFET 可用于极低功耗、高频率的电子设备。
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引用次数: 0
Impact of the Catalytic Activity of SiO2 on the Synthesis of Aryl Benzimidazoles and its Mechanism: NMR Studies and Antimicrobial Effect SiO2 的催化活性对芳基苯并咪唑合成的影响及其机理:核磁共振研究与抗菌效果
IF 2.8 3区 材料科学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2024-09-16 DOI: 10.1007/s12633-024-03140-3
S. M. Prakash, K. Jayamoorthy, N. Srinivasan

Nano SiO₂ has been effectively utilized as a catalyst in the synthesis of new benzimidazoles. The resulting benzimidazoles have been characterized using 1H and 13C NMR spectroscopy, confirming their structure and purity. This nano catalyst is notable for its ability to produce higher product yields, reduce reaction times, and operate in environmentally friendly reaction media. Additionally, it is versatile in accommodating a wide range of substrates, making it a highly efficient and sustainable option for benzimidazole synthesis. The single crystal X-ray analysis of 2-(naphthalen-1-yl)-1-phenyl-1H-benzo[d]imidazole (1) has been performed and discussed. Compound 1 exhibits substantially planar naphthalene ring system [maximum deviation = 0.0254 (6) A º] and benzimidazole unit [maximum deviation = 0.0258 (6) A º]. A dihedral angle of 61.955 (17) ˚ is made by them. The imidazole ring forms a dihedral angle of 61.73 (4) ˚ with the phenyl ring. The benzimidazoles2-(4-(difluoromethyl)phenyl)-1-phenyl-1H-benzo[d]imidazole (2), 1-(4-chlorobenzyl)-2-(4-chlorophenyl)-1H-benzo[d]imidazole (4) and 1-(4-bromobenzyl)-2-(4-bromophenyl)-1H-benzo[d]imidazole (5) are more active against S.aureus and S.typhi, for antibacterial studies. In comparison to the usual medication, benimidazoles 2 and 4 exhibit greater activity against A. flavus and C. albicans in antifungal tests.

纳米 SiO₂被有效地用作合成新型苯并咪唑的催化剂。利用 1H 和 13C NMR 光谱对合成的苯并咪唑进行了表征,确认了它们的结构和纯度。这种纳米催化剂的显著特点是能够产生更高的产品收率,缩短反应时间,并能在环境友好型反应介质中运行。此外,它还能适应多种底物,是一种高效、可持续的苯并咪唑合成选择。我们对 2-(萘-1-基)-1-苯基-1H-苯并[d]咪唑(1)进行了单晶 X 射线分析和讨论。化合物 1 显示出基本平面的萘环系统[最大偏差 = 0.0254 (6) A º]和苯并咪唑单元[最大偏差 = 0.0258 (6) A º]。它们的二面角为 61.955 (17) ˚。咪唑环与苯环形成 61.73 (4) ˚ 的二面角。在抗菌研究中,苯并咪唑-2-(4-(二氟甲基)苯基)-1-苯基-1H-苯并[d]咪唑(2)、1-(4-氯苄基)-2-(4-氯苯基)-1H-苯并[d]咪唑(4)和 1-(4-溴苄基)-2-(4-溴苯基)-1H-苯并[d]咪唑(5)对金黄色葡萄球菌和伤寒杆菌更有活性。与普通药物相比,苯并咪唑 2 和 4 在抗真菌试验中对黄曲霉和白僵菌的活性更高。
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引用次数: 0
Effect of deposition parameters on the optical and structural properties of silicon-hydrogen films deposited by RF magnetron sputtering 沉积参数对射频磁控溅射沉积硅氢薄膜的光学和结构特性的影响
IF 2.8 3区 材料科学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2024-09-16 DOI: 10.1007/s12633-024-03142-1
Sutapa Badyakar, G. Mohan Rao, Sanjana MN, Sneha C, Monisha D, Likitha Yallegowda, Chandasree Das

This study reports the deposition of amorphous hydrogenated silicon thin films by radio frequency magnetron sputtering and their optical characterization by UV–visible spectroscopy and FTIR Spectroscopy. Structural characterization and morphological studies are also performed. It investigates the effect of process factors such as RF power, hydrogen concentration, and deposition temperature on the optical properties of the deposited films. The impact of process parameters like RF power, hydrogen flow, and substrate temperature on the bandgap, refractive index and hydrogen concentration has been studied. The study draws a comparison due to the crucial interactions among RF power, hydrogen flow, and substrate temperature which affect the optical and structural characteristics of a-Si:H thin films. For a particular application, the critical control of these parameters is necessary to provide the requisite film qualities. The films prepared with optimized deposition parameters of RF power of 80 W, hydrogen flow of 5 sccm, and deposition temperature of 150 °C, resulted in a bandgap value of 1.80 eV, refractive index of 2.3, and hydrogen concentration of 5.15% which can be useful as absorber layer in photovoltaic applications. Despite the amorphous nature of all the films, achieving a high-quality a-Si:H thin film requires control over the growth structures, where hydrogen plays a crucial role in passivating the defects.

本研究报告了通过射频磁控溅射沉积非晶氢化硅薄膜的过程,以及通过紫外可见光谱和傅立叶变换红外光谱对其进行的光学表征。此外,还进行了结构表征和形态研究。它研究了射频功率、氢浓度和沉积温度等工艺因素对沉积薄膜光学特性的影响。研究了射频功率、氢气流量和基底温度等工艺参数对带隙、折射率和氢气浓度的影响。由于射频功率、氢气流量和基底温度之间的重要相互作用会影响 a-Si:H 薄膜的光学和结构特性,因此该研究进行了比较。在特定应用中,必须对这些参数进行关键控制,以提供所需的薄膜质量。在射频功率为 80 W、氢气流量为 5 sccm、沉积温度为 150 °C 的优化沉积参数下制备的薄膜,其带隙值为 1.80 eV,折射率为 2.3,氢气浓度为 5.15%,可用作光伏应用中的吸收层。尽管所有薄膜都是无定形的,但要获得高质量的 a-Si:H 薄膜需要控制生长结构,而氢在钝化缺陷方面起着至关重要的作用。
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引用次数: 0
An FEA Analysis of Nano-Silica Reinforced Chitosan Based Dental Implant Under Dynamic Loading 基于纳米二氧化硅的壳聚糖牙科植入物在动态载荷下的有限元分析
IF 2.8 3区 材料科学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2024-09-16 DOI: 10.1007/s12633-024-03133-2
Sambhrant Srivastava, Saroj Kumar Sarangi, Savendra Pratap Singh

This study investigates the impact of different materials and dental implant-abutment interface models on bone shielding effects, micro-gap formation, and torque loss in abutment screws. Von-Misses stress analysis identifies the MTC model as exhibiting maximum stress transfer for titanium alloy and CFR-PEEK, while the IHC model dominates for C2 bio-composite dental implants. Although material type has minimal influence on stress shielding, the implant-abutment interface model proves crucial. Micro-gap analysis reveals the Optimized dental implant consistently displaying minimal micro-gaps across materials, while the NLD model consistently exhibits maximum micro-gaps. Both material type and interface model significantly influence micro-gap formation. Torque loss in abutment screws varies, with the MTC model consistently experiencing high torque loss and IHC showing minimal loss. The study underscores the importance of considering material properties and interface models in dental implant design, offering valuable insights for the development of reliable dental prosthetics.

本研究探讨了不同材料和牙科种植体-基台界面模型对骨屏蔽效应、微间隙形成和基台螺钉扭矩损失的影响。Von-Misses 应力分析表明,MTC 模型对钛合金和 CFR-PEEK 具有最大的应力传递作用,而 IHC 模型则对 C2 生物复合材料牙科种植体起主导作用。虽然材料类型对应力屏蔽的影响很小,但种植体-基台界面模型却至关重要。微间隙分析表明,优化牙科种植体在各种材料中始终显示出最小的微间隙,而 NLD 模型始终显示出最大的微间隙。材料类型和界面模型都对微间隙的形成有很大影响。基台螺钉的扭矩损失各不相同,MTC 模型的扭矩损失一直很大,而 IHC 模型的扭矩损失很小。这项研究强调了在牙科种植体设计中考虑材料特性和界面模型的重要性,为开发可靠的牙科修复体提供了宝贵的见解。
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引用次数: 0
Synthesis and Effect of MgSO4 co-doping on the Optical, IR, and Raman Spectroscopic Studies of Eu3+-Doped Alkaline Silica Borate Glasses Produced with SLS Glass as a Silica Source 以 SLS 玻璃为硅源制备的掺杂 Eu3+ 的碱性硅硼酸盐玻璃的合成及其共掺杂 MgSO4 对其光学、红外和拉曼光谱研究的影响
IF 2.8 3区 材料科学 Q3 CHEMISTRY, PHYSICAL Pub Date : 2024-09-16 DOI: 10.1007/s12633-024-03134-1
Nabasu Seth Ezra, Iskandar Shahrim Mustafa, M. I. Sayyed, K. K. Dakok, Thair Hussein Khazaalah, G. I. Efenji, Munirah Jamil, Hayder Salah Naeem, A. O. Oke, I. M. Fadhirul, Ali Saleh Alkadem Idriss

Two sets of glasses were prepared by rapid melt quench method in the glass system (Eu2O3)x (Na2O)0.1 (B2O3)0.6 (SLS)0.3-x and (Eu2O3)0.01 (Na2O)0.1 (B2O3)0.6 (SLS)0.29-y (MgSO4)y with x and y = 0, 0.005, 0.01, 0.03, and 0.05 mol% to check the effect of MgSO4 inclusion on the glass properties. XRF analysis confirmed the chemical composition of the SLS glass to be 70.81wt% SiO2. The addition of MgSO4 to NaSBEu glasses lowered the sample’s density due to the lower density of Mg (1.738 g/cm3), whereas Eu has a density of 5.25 g/cm3. Adding MgSO4 to NaSBEu glasses raised the band gap values from 3.85 to 3.90 eV and the indirect band gap from 3.22 to 3.23 eV for NaSBEu0.005. The absorption peaks result from the trigonal BO3 bond's relaxation, which causes asymmetric vibrational stretching of the borate. The primary basis for the network structure of these glass samples is the arrangement of BO3 and BO4 units in various structural groupings. The sharpness of the IR absorption peaks increases with the addition of MgSO4.

采用快速熔淬法制备了两组玻璃,分别为玻璃体系 (Eu2O3)x (Na2O)0.1 (B2O3)0.6 (SLS)0.3-x 和 (Eu2O3)0.01 (Na2O)0.1 (B2O3)0.6 (SLS)0.29-y (MgSO4)y (x 和 y = 0、0.005、0.01、0.03 和 0.05 mol%),以检验 MgSO4 的加入对玻璃性能的影响。XRF 分析证实 SLS 玻璃的化学成分为 70.81wt% SiO2。由于镁的密度较低(1.738 g/cm3),而 Eu 的密度为 5.25 g/cm3,因此在 NaSBEu 玻璃中加入 MgSO4 会降低样品的密度。在 NaSBEu 玻璃中加入 MgSO4 会使 NaSBEu0.005 的带隙值从 3.85 eV 提高到 3.90 eV,间接带隙值从 3.22 eV 提高到 3.23 eV。吸收峰产生于三方硼酸键的弛豫,它引起了硼酸盐的不对称振动伸展。这些玻璃样品网络结构的主要依据是不同结构分组中 BO3 和 BO4 单元的排列。红外吸收峰的尖锐度随着 MgSO4 的加入而增加。
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引用次数: 0
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Silicon
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