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Structural descriptors evaluation for MoTa mechanical properties prediction with machine learning 利用机器学习评估钽锰酸锂机械性能的结构描述符
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2024-01-09 DOI: 10.1088/1361-651x/ad1cd1
Tingpeng Tao, Shu Li, Dechuang Chen, Shuai Li, Dongrong Liu, Xin Liu, Minghua Chen
Considering all possible crystal structures is essential in computer simulations of alloy properties, but using Density Functional Theory (DFT) is computationally impractical. To address this, four structural descriptors were evaluated using machine learning (ML) models to predict formation energy, elasticity and hardness of MoTa alloys. A total of 612 configurations were generated by the Clusters Approach to Statistical Mechanics (CASM) software and their corresponding material properties were calculated by DFT. As input features of ML models, the CORR and SOAP performed best (R2 > 0.90, some up to 0.99), followed by ACSF, while CM performed worst. Furthermore, SOAP shows excellent performance in extrapolation for larger supercell structures of the MoTa alloy system and transfer learning for the MoNb alloy system.
在对合金特性进行计算机模拟时,必须考虑所有可能的晶体结构,但使用密度泛函理论(DFT)在计算上并不现实。为了解决这个问题,我们使用机器学习(ML)模型对四种结构描述符进行了评估,以预测钼钽合金的形成能、弹性和硬度。统计力学聚类方法(CASM)软件共生成了 612 种构型,并通过 DFT 计算了其相应的材料属性。作为 ML 模型的输入特征,CORR 和 SOAP 表现最好(R2 > 0.90,有些高达 0.99),其次是 ACSF,而 CM 表现最差。此外,SOAP 在对 MoTa 合金体系的较大超晶胞结构进行外推以及对 MoNb 合金体系进行迁移学习方面表现出色。
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引用次数: 0
First-principles and machine learning investigation on A4BX6 halide perovskites A4BX6 卤化物包晶的第一性原理和机器学习研究
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-12-29 DOI: 10.1088/1361-651x/ad16ef
Pan Zheng, Yiru Huang, Lei Zhang
The A4BX6 molecular halide perovskites have received attention owing to their interesting optoelectronic properties at the molecular scale; however, a comprehensive dataset of their atomic structures and electronic properties and associated data-driven investigation are still unavailable now, which makes it difficult for inverse materials design for semiconductor applications (e.g. wide band gap semiconductor). In this manuscript, we employ data-driven methods to predict band gaps of A4BX6 molecular halide perovskites via machine learning. A large virtual design database including 246 904 A4BX6 perovskite samples is predicted via machine learning, based on the model trained using 2740 first-principles results of A4BX6 molecular halide perovskites. In addition, symbolic regression-based machine learning is employed to identify more physically intuitive descriptors based on the starting first-principles dataset of A4BX6 molecular halide perovskites. In addition, different ranking methods are employed to offer a comprehensive feature importance analysis for the halide perovskite materials. This study highlights the efficacy of machine learning-assisted compositional design of A4BX6 perovskites, and the multi-dimensional database established here is valuable for future experimental validation toward perovskite-based wide band gap semiconductor materials.
A4BX6 卤化物分子包晶石因其在分子尺度上有趣的光电特性而备受关注;然而,有关其原子结构和电子特性的全面数据集以及相关的数据驱动研究现在仍然不可用,这给半导体应用(如宽带隙半导体)的反向材料设计带来了困难。在本手稿中,我们采用数据驱动方法,通过机器学习预测 A4BX6 分子卤化物包晶石的带隙。基于使用 2740 个 A4BX6 分子卤化物包晶的第一原理结果训练的模型,我们通过机器学习预测了包括 246 904 个 A4BX6 包晶样品在内的大型虚拟设计数据库。此外,还采用了基于符号回归的机器学习方法,根据 A4BX6 卤化分子包晶的起始第一原理数据集识别出更多物理直观描述符。此外,还采用了不同的排序方法,为卤化物透视材料提供全面的特征重要性分析。这项研究凸显了机器学习辅助 A4BX6 包晶石组成设计的功效,而在此建立的多维数据库对未来基于包晶石的宽带隙半导体材料的实验验证具有重要价值。
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引用次数: 0
Exploring the effects of temperature on the mechanical properties of high-entropy alloy (CoCrFeNiAl0.1) based on molecular dynamics simulation 基于分子动力学模拟探索温度对高熵合金(CoCrFeNiAl0.1)力学性能的影响
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-12-19 DOI: 10.1088/1361-651x/ad111f
Yunhai Liu, Benteng Che, Xiaowen Wang, Yiyao Luo, Hu Zhang, Ligao Liu, Penghui Xu
In order to further explore the influence of temperature on the face-centered cubic (FCC) single-phase crystal CoCrFeNiAl0.1, we conducted a series of Nano-indentation experiments on CoCrFeNiAl0.1 at different temperatures. At room temperature, the effects of indentation can convert a portion of CoCrFeNiAl0.1’s FCC phase into a funnel-shaped hexagonal close-packed (HCP) phase, resulting less deformation on the sides of the indenter. What we analyzed shows that CoCrFeNiAl0.1’s HCP phase has excellent heat resistance and mechanics, allowing CoCrFeNiAl0.1 to maintain great properties in high-temperature environments. However, if T ⩾ 1500 K, high temperature will decrease the number of the HCP phases and dislocation density, leading to an accelerated decline in material strength. This research can provide a theoretical relationship between temperature and microstructural evolution for the research and application of CoCrFeNiAl0.1 in high-temperature environments.
为了进一步探索温度对面心立方(FCC)单相晶体 CoCrFeNiAl0.1 的影响,我们在不同温度下对 CoCrFeNiAl0.1 进行了一系列纳米压痕实验。在室温下,压痕效应可将 CoCrFeNiAl0.1 的部分 FCC 相转化为漏斗状的六方紧密堆积(HCP)相,从而减少压头两侧的变形。我们的分析表明,CoCrFeNiAl0.1 的 HCP 相具有出色的耐热性和力学性能,可使 CoCrFeNiAl0.1 在高温环境中保持良好的性能。然而,如果 T ⩾ 1500 K,高温会减少 HCP 相的数量和位错密度,导致材料强度加速下降。该研究可为 CoCrFeNiAl0.1 在高温环境中的研究和应用提供温度与微观结构演变之间的理论关系。
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引用次数: 0
Numerical simulation of solar cell performance with copper-based layered perovskite using SCAPS-1D software 使用 SCAPS-1D 软件对铜基层状过氧化物太阳能电池性能进行数值模拟
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-12-15 DOI: 10.1088/1361-651x/ad104e
Aparna Thankappan
Perovskite solar cells (PSCs) have garnered extensive research interest due to their potential for efficient, flexible, and cost-effective solar energy production, making them suitable for wearable and low-cost applications. In this study, we successfully synthesized layered copper-based perovskite materials, and subsequently conducted simulations using the Solar Cell Capacitance Simulator SCAPS-1D. This study introduces, a PSC structure with (CH3NH3)2CuCl4 as the active layer. By employing a two-step chemical method, we have successfully synthesized (CH3NH3)2CuCl4, and its optical band gap was determined using Tauc’s extrapolation method. Utilizing the experimentally determined bandgap as the simulation input, we predicted a solar architecture consisting of glass substrate/fluorine-doped tin oxide/TiO2/(CH3NH3)2CuCl4/spiro-OMeTAD/Pt, which exhibited an impressive conversion efficiency of 27.93% along with a fill factor of 62.04%, Jsc of 34.39 mA cm−2, and Voc of 1.31 V. Through the software, we conducted a comprehensive study on the impact of back metal contact, hole transport layer, electron transport layer, layer thickness, temperature, and defect density on the overall device performance. These results unveil the development of an environmentally friendly PSC based on methylammonium copper.
过氧化物太阳能电池(PSCs)具有高效、灵活和成本效益高的太阳能生产潜力,适用于可穿戴和低成本应用,因此引起了广泛的研究兴趣。在本研究中,我们成功合成了层状铜基过氧化物材料,随后使用太阳能电池电容模拟器 SCAPS-1D 进行了模拟。本研究介绍了一种以 (CH3NH3)2CuCl4 为活性层的 PSC 结构。我们采用两步化学法成功合成了 (CH3NH3)2CuCl4,并利用陶氏外推法确定了其光带隙。利用实验测定的带隙作为模拟输入,我们预测了一种由玻璃基板/掺氟氧化锡/TiO2/(CH3NH3)2CuCl4/螺-OMeTAD/Pt 组成的太阳能结构。我们通过软件全面研究了背金属接触、空穴传输层、电子传输层、层厚度、温度和缺陷密度对器件整体性能的影响。这些结果揭示了基于甲基铵铜的环保型 PSC 的发展方向。
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引用次数: 0
Predicting multi-component, high-temperature metallic glasses by coupling empirical models, CALPHAD, and a genetic algorithm 通过结合经验模型、CALPHAD 和遗传算法预测多组分高温金属玻璃
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-12-14 DOI: 10.1088/1361-651x/ad15a9
Jerry Howard, Krista Carlson, L. Mushongera
Metallic glasses (MGs) are an emerging class of materials possessing multiple desirable properties including high strength, hardness, and corrosion resistance when compared to their crystalline counterparts. However, most previously studied MGs are not useful in high temperature environments because they undergo the glass transition phenomenon and crystallize below the melting point. In addition, bulk MGs are typically found in multi-component systems, meaning that searching compositional space with a reasonable resolution using computational or experimental methods can be costly. In this study, an in-house developed genetic algorithm-based tool was used to locate alloy compositions with high glass forming ability (GFA) and high-temperature stability in the Ta-Ni-Co-B alloy system. GFA was predicted using an empirical predictive parameter known as P_HSS. High-temperature stability was predicted using the CALPHAD method to calculate liquidus temperature. Justification for the use of P_HSS to predict GFA of high-temperature MGs, as well as the use of liquidus temperature as a predictor of general high-temperature stability, was given in the form of a meta-analysis of previously reported MG compositions. The predictions made using this algorithm were analyzed and are presented herein. While high-temperature stability was the property of interest for this research, this framework could be used in the future to locate alloys with other application-specific material properties. This genetic algorithm-based tool enables the coupling of empirical parameters and CALPHAD to efficiently search multi-component space to locate glass-forming alloys with desirable properties.
金属玻璃(MGs)是一类新兴材料,与晶体材料相比,具有高强度、高硬度和耐腐蚀等多种理想特性。然而,之前研究的大多数金属玻璃在高温环境中并不适用,因为它们会发生玻璃转化现象,并在熔点以下结晶。此外,块状 MG 通常存在于多组分体系中,这意味着使用计算或实验方法以合理的分辨率搜索成分空间可能成本高昂。本研究使用内部开发的基于遗传算法的工具,在 Ta-Ni-Co-B 合金体系中找到具有高玻璃化能力(GFA)和高温稳定性的合金成分。GFA 是使用经验预测参数 P_HSS 预测的。高温稳定性是使用计算液相温度的 CALPHAD 方法进行预测的。使用 P_HSS 预测高温 MG 的 GFA 以及使用液相温度预测一般高温稳定性的理由,是通过对以前报告的 MG 成分进行元分析得出的。本文分析并介绍了使用该算法得出的预测结果。虽然高温稳定性是本研究关注的属性,但这一框架将来也可用于定位具有其他特定应用材料属性的合金。这种基于遗传算法的工具可以将经验参数和 CALPHAD 结合起来,有效地搜索多组分空间,从而找到具有理想特性的玻璃成型合金。
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引用次数: 0
Study on the surface microtexture microscopic friction and wear characteristics of 304 stainless steel 304 不锈钢表面微观纹理微观摩擦和磨损特性研究
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-12-14 DOI: 10.1088/1361-651X/ad15aa
Jingting Sun, Z. Yuan, Meiling Tang, Peng Zheng, Yan He, Ying Wang
In order to reveal the friction behaviour and wear mechanism of nanoscale textures on the friction pair of 304 stainless steel, molecular dynamics simulations were firstly used to investigate the effects of smooth and textured surfaces on the tribological properties of the stainless steel substrate, and then focus on the effects of sliding velocity and depth on the surface morphology, mechanical force, friction coefficient, anisotropy, stress, temperature and dislocations of the textured substrate. The results show that the temperature, friction, stress, and dislocation line length of the textured surface are relatively smaller than those of the non-textured surface, and the textured surface has a smaller and more stable friction factor, which ultimately leads to a reduction of the friction factor by about 0.090. When the sliding distance is 120 Å, the number of defective atoms in the textured substrate is reduced by 12.9%, and its anisotropy is more stable. At the same indentation depth, the average friction coefficient, temperature and anisotropy increase significantly with increasing sliding velocity. The average friction coefficient is maximum when the sliding velocity is increased to 400 m s−1, with a value of about 0.833. The sliding friction, friction coefficient, dislocation line length, number of defect atoms, number of stacked atoms, stress, temperature and anisotropy factor increase with increasing depth of abrasive indentation. The average friction coefficient is minimum at a sliding depth of 4 Å, with a value of about 0.556, and the number of defective atoms is reduced by 83.2%. This indicates that textured surface treatment of 304 stainless steel and selection of appropriate sliding parameters can effectively reduce the wear during the friction process and improve the wear resistance of the substrate.
为了揭示纳米级纹理对304不锈钢摩擦副的摩擦行为和磨损机理,首先利用分子动力学模拟研究了光滑表面和纹理表面对不锈钢基体摩擦学性能的影响,然后重点研究了滑动速度和深度对纹理基体表面形貌、机械力、摩擦系数、各向异性、应力、温度和位错的影响。结果表明,纹理表面的温度、摩擦力、应力和位错线长度相对小于非纹理表面,纹理表面的摩擦系数更小、更稳定,最终导致摩擦系数降低了约 0.090。当滑动距离为 120 Å 时,纹理基底中的缺陷原子数量减少了 12.9%,其各向异性也更加稳定。在相同的压痕深度下,随着滑动速度的增加,平均摩擦系数、温度和各向异性都显著增加。当滑动速度增加到 400 m s-1 时,平均摩擦系数最大,约为 0.833。滑动摩擦力、摩擦系数、位错线长度、缺陷原子数、堆积原子数、应力、温度和各向异性因子随磨料压痕深度的增加而增加。平均摩擦系数在滑动深度为 4 Å 时最小,值约为 0.556,缺陷原子数减少了 83.2%。这表明,对 304 不锈钢进行纹理表面处理并选择适当的滑动参数,可有效减少摩擦过程中的磨损,提高基体的耐磨性。
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引用次数: 0
Investigating the electronic structure, elastic, magnetic, and thermoelectric nature of NiVXSc1-XSb quaternary half-Heusler alloys 研究 NiVXSc1-XSb 四元半休斯勒合金的电子结构、弹性、磁性和热电性质
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-12-12 DOI: 10.1088/1361-651x/ad1493
G. Benabdellah, Djaafri toufik, Mohamed Mokhtari, Muhammad Salman Khan, A. Tawfeek, Hijaz Ahmad
The structural, electronic, magnetic, elastic, and thermoelectric properties of NiVxSc1-xSb half Heusler alloys with different compositions were investigated employing a self-consistent first-principles-based calculation that uses the full-potential linearized-augmented-plane-wave method. The structural characteristics, such as the bulk modulus and lattice constants, are examined with various vanadium concentrations. The accurately modified Becke Johnson potential was used to calculate the band gap energies. The equilibrium lattice parameter of NiScSb type-I structure has the lowest energy and seems to be most stable among the other configurations with a lattice constant value of 6.04 Å, which deviates from the experimental results by up to 0.5%. The bulk modulus rises as the lattice constant decreases. The ground states of the studied alloy structures are dynamically stable, as concluded by the non-existence of negative phonon frequency. The band structure of NiScSb (for x = 0) was predicted as a non-magnetic semiconductor with an indirect band nature, and an energy gap value of 0.244 eV along (Γ-point > X). This tendency was further supported by the symmetrical shape of the curves that reflect the densities of states for these configuration channels. The thermoelectric characteristics of these various combinations were also thoroughly investigated and discussed.
通过基于第一原理的自洽计算,采用全电势线性化-增强平面波方法,研究了不同成分的 NiVxSc1-xSb 半 Heusler 合金的结构、电子、磁性、弹性和热电特性。研究了不同钒浓度下的结构特征,如体积模量和晶格常数。精确修正的贝克-约翰逊势被用来计算带隙能。NiScSb I 型结构的平衡晶格参数能量最低,在其他构型中似乎最稳定,晶格常数值为 6.04 Å,与实验结果偏差达 0.5%。随着晶格常数的减小,体积模量也随之增大。所研究合金结构的基态是动态稳定的,不存在负声子频率。根据预测,NiScSb(x = 0 时)的能带结构是一种非磁性半导体,具有间接能带性质,沿(Γ点 > X)的能隙值为 0.244 eV。反映这些配置通道状态密度的曲线的对称形状进一步证实了这一趋势。此外,还对这些不同组合的热电特性进行了深入研究和讨论。
{"title":"Investigating the electronic structure, elastic, magnetic, and thermoelectric nature of NiVXSc1-XSb quaternary half-Heusler alloys","authors":"G. Benabdellah, Djaafri toufik, Mohamed Mokhtari, Muhammad Salman Khan, A. Tawfeek, Hijaz Ahmad","doi":"10.1088/1361-651x/ad1493","DOIUrl":"https://doi.org/10.1088/1361-651x/ad1493","url":null,"abstract":"\u0000 The structural, electronic, magnetic, elastic, and thermoelectric properties of NiVxSc1-xSb half Heusler alloys with different compositions were investigated employing a self-consistent first-principles-based calculation that uses the full-potential linearized-augmented-plane-wave method. The structural characteristics, such as the bulk modulus and lattice constants, are examined with various vanadium concentrations. The accurately modified Becke Johnson potential was used to calculate the band gap energies. The equilibrium lattice parameter of NiScSb type-I structure has the lowest energy and seems to be most stable among the other configurations with a lattice constant value of 6.04 Å, which deviates from the experimental results by up to 0.5%. The bulk modulus rises as the lattice constant decreases. The ground states of the studied alloy structures are dynamically stable, as concluded by the non-existence of negative phonon frequency. The band structure of NiScSb (for x = 0) was predicted as a non-magnetic semiconductor with an indirect band nature, and an energy gap value of 0.244 eV along (Γ-point > X). This tendency was further supported by the symmetrical shape of the curves that reflect the densities of states for these configuration channels. The thermoelectric characteristics of these various combinations were also thoroughly investigated and discussed.","PeriodicalId":18648,"journal":{"name":"Modelling and Simulation in Materials Science and Engineering","volume":"36 23","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-12-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139008865","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
Numerical simulation of nanosecond laser drilling of 316L stainless steel: addition of laser focus and analysis of manufacturing process 316L 不锈钢纳秒激光钻孔的数值模拟:增加激光焦点和分析制造过程
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-12-08 DOI: 10.1088/1361-651x/ad0e79
Junliang Zhao, Chen Li, Jing Wang
A two-dimensional model of nanosecond laser drilling 316L stainless steel was established with the consideration of laser focus, which was indeed different from the original two-phase flow model without laser focus, especially in the temperature field, velocity field, surface morphology and hole depth. Simulation and experiment of drilling holes with different laser repetition frequencies (100 kHz, 50 kHz and 20 kHz) were carried out. The results show that manufacturing process could divide into three stages: high-efficiency phase, stabilization stage and low-efficiency phase. Meanwhile, the limited number of pulses at 100 kHz, 50 kHz and 20 kHz were obtained, and the values were approximately 289, 367 and 492, respectively. More, the values at 10 kHz and 200 kHz obtained by modeling were very close to those calculated by the fitted equation. All the research provides theoretical, simulation and experimental basis for designing and optimizing parameters on laser surface manufacturing.
建立了考虑激光聚焦的纳秒激光钻削 316L 不锈钢的二维模型,该模型与无激光聚焦的原始两相流模型确有不同,尤其是在温度场、速度场、表面形态和孔深方面。对不同激光重复频率(100 kHz、50 kHz 和 20 kHz)的钻孔进行了模拟和实验。结果表明,制造过程可分为三个阶段:高效阶段、稳定阶段和低效阶段。同时,在 100 kHz、50 kHz 和 20 kHz 频率下获得的有限脉冲数分别约为 289、367 和 492。此外,建模得到的 10 kHz 和 200 kHz 的值与拟合方程计算的值非常接近。所有研究都为激光表面制造参数的设计和优化提供了理论、模拟和实验依据。
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引用次数: 0
First-principles studies of oxygen interstitial dopants in RbPbI3 halide for perovskite solar cells 用于包晶太阳能电池的 RbPbI3 卤化物中氧间隙掺杂物的第一性原理研究
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-12-07 DOI: 10.1088/1361-651x/ad104f
Chongyao Yang, Wei Wu, Kwang-Leong Choy
Recently perovskite solar cells (PSCs) have caught much attention. Oxygen atom (O1) and molecule (O2) are important dopants to influence the stability of the structural, electronic and optical properties, thus the performance of PSCs. RbPbX3-type perovskites have fantastic chemical stability and good power conversion efficiency. Here we have studied the effects of interstitial O1 and O2 on the structural properties, and hence the electronic structure of RbPbI3 from first principles. We have included the van der Waals (vdW) forces into our density-functional-theory calculations. The formation of dopant level within the pristine band gap has been found when incorporating oxygen. The defect level, dominated by oxygen and iodine, is above the valence band maximum by 0.5–1.3 eV, depending on the location of the defects in the bulk. In addition, we can see the bandwidths of the defect levels are very narrow, which could trap the electron and affect the transport properties. In addition, a metallic state has been found in our calculations for interstitial oxygen molecule when there are strong O–O, O–Pb, and O–I bonds, indicating the complex nature of oxygen-doped PSCs. The comparison between the defect formation energies when doping oxygen atom and molecules is consistent with the previous report about oxygen-molecule passivation of PSCs. Our work has therefore provided important theoretical insight to the effect of oxygen dopants on the electronic structure of RbPbI3.
最近,过氧化物太阳能电池(PSCs)引起了广泛关注。氧原子(O1)和氧分子(O2)是重要的掺杂剂,影响着透镜太阳能电池的结构稳定性、电子和光学性能,进而影响其性能。RbPbX3 型过氧化物晶石具有出色的化学稳定性和良好的功率转换效率。在此,我们从第一性原理出发,研究了间隙 O1 和 O2 对 RbPbI3 结构特性以及电子结构的影响。我们在密度函数理论计算中加入了范德华力(vdW)。当加入氧气时,发现在原始带隙内形成了掺杂水平。以氧和碘为主的缺陷水平高于价带最大值 0.5-1.3 eV,具体取决于缺陷在块体中的位置。此外,我们还可以看到缺陷水平的带宽非常窄,这可能会捕获电子并影响传输特性。此外,当存在强 O-O、O-Pb 和 O-I 键时,我们在计算中发现了间隙氧分子的金属态,这表明了掺氧 PSC 的复杂性质。掺杂氧原子和氧分子时缺陷形成能量的比较与之前关于 PSCs 的氧分子钝化的报道一致。因此,我们的工作为研究掺氧对 RbPbI3 电子结构的影响提供了重要的理论依据。
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引用次数: 0
3D finite element simulation of scratch testing to quantify experimental failure mechanisms of a thin film 三维有限元模拟划痕测试,量化薄膜的实验失效机制
IF 1.8 4区 材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Pub Date : 2023-11-24 DOI: 10.1088/1361-651x/ad0ce1
José R Pérez-Higareda, Uriel Jirón-Lazos, Zeuz Montiel-González, Dalia A Mazón-Montijo, Andrés M Garay-Tapia, David Torres-Torres
In this work, an exhaustive finite element (FE) simulation was developed to closely reproduce experimental parameters such as normal force, tangential force, and penetration depth along the whole scratch test. We used an 800 nm thick Ti–Al–N thin film deposited by sputtering as the reference sample to carry out scratch tests identifying the appearance of failure mechanisms at different longitudinal displacements and critical loads. The hardening models of thin film and substrate allowed us to quantify the maximum principal stresses responsible for thin film spallation, about 14.5 GPa for the tensile mode and −1.49 GPa for the compression mode. These parameters provided an improved perspective to characterize the failure mechanisms on the sample during the scratching. The present enhanced 3D FE simulation can be a crucial tool for designing film-substrate systems with more precise mechanical strength calculations.
在这项工作中,我们开发了一种详尽的有限元(FE)模拟,以密切再现整个划痕测试过程中的法向力、切向力和穿透深度等实验参数。我们使用通过溅射沉积的 800 nm 厚 Ti-Al-N 薄膜作为参考样品,进行划痕测试,以确定在不同纵向位移和临界载荷下出现的破坏机制。薄膜和基底的硬化模型使我们能够量化导致薄膜剥落的最大主应力,拉伸模式约为 14.5 GPa,压缩模式约为-1.49 GPa。这些参数为描述划痕过程中样品的破坏机制提供了一个更好的视角。本增强型三维 FE 仿真可作为设计薄膜-基底系统的重要工具,提供更精确的机械强度计算。
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引用次数: 0
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Modelling and Simulation in Materials Science and Engineering
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