Surface & Coatings Technology最新文献_第2页

Fabrication of multifunctional cu-coated melamine foam by electroless chemical deposition technique for thermal management, EMI shielding, and antibacterial applications 利用化学沉积技术制造多功能铜涂层三聚氰胺泡沫，用于热管理、电磁干扰屏蔽和抗菌应用

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2024-11-23 DOI: 10.1016/j.surfcoat.2024.131582

Jittipat Omsinsombon , Shi Hu , Mohanapriya Venkataraman , Jiri Militky , Amorn Chaiyasat , Preeyaporn Chaiyasat

Melamine foam (MF) inherently possesses excellent flame-retardant properties due to its ability to release nitrogen upon combustion. Its porous and loose structure also contributes to its high flexibility, breathability, and sound absorption capabilities. Incorporating copper nanoparticles (Cu NPs) significantly enhances the material's electrical conductivity, including its electromagnetic shielding effectiveness, thermal conductivity, and antibacterial properties. This, in turn, greatly broadens the material's potential applications. This research investigated the coating of Cu NPs on three-dimensional MF using an electroless chemical deposition technique to fabricate multifunctional materials. The electromagnetic shielding effectiveness (SE_T) increased to 85 dB as the Cu NPs content rose from 0 to 0.31 g. Similarly, the electrical conductivity increased from 0.19 to 357 S/m. These results indicate that the Cu-coated MF has high EMI shielding and conductivity properties. The strong adhesion of the Cu NPs to the MF surface created a coating with low infrared emissivity, contributing to the material's excellent thermal insulation properties. With a modest supply voltage of around 4 V, the material exhibited promising electrical conductivity, generating additional warmth of up to 74 °C through efficient joule heating. Furthermore, the Cu-coated MF demonstrated 100 % antibacterial activity, making it a promising candidate for a variety of applications.

三聚氰胺泡沫（MF）因其燃烧时释放氮气的能力，本身就具有优异的阻燃性能。其多孔和疏松的结构也使其具有很高的柔韧性、透气性和吸音能力。加入纳米铜粒子（Cu NPs）可显著增强材料的导电性，包括电磁屏蔽效果、导热性和抗菌性。这反过来又大大拓宽了材料的潜在应用领域。本研究采用无电解化学沉积技术在三维 MF 上涂覆 Cu NPs，以制备多功能材料。随着 Cu NPs 含量从 0 g 增加到 0.31 g，电磁屏蔽效能（SET）增加到 85 dB。这些结果表明，Cu 涂层 MF 具有很高的电磁干扰屏蔽和导电性能。Cu NPs 与中频表面的强附着力形成了一种红外发射率低的涂层，从而使材料具有出色的隔热性能。在 4 V 左右的适度电源电压下，该材料表现出良好的导电性，通过高效焦耳加热产生高达 74 °C 的额外温度。此外，铜涂层中频材料显示出 100% 的抗菌活性，使其成为各种应用的理想候选材料。

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引用次数: 0

Preparation, microstructure evolution, and crystallization behavior of eutectic YAG/Al2O3 ceramic coating deposited by atmospheric plasma spraying

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2024-11-23 DOI: 10.1016/j.surfcoat.2024.131571

Jie Li , Cuihong Li , Yang Cui , Tiefeng Du , Zhixin Luo , Cui Zhou , Haoyu Wang , Luchao Sun , Jingyang Wang

In this study, eutectic Y₃Al₅O₁₂/Al₂O₃ coatings with alternating YAG and Al₂O₃ phases are successfully prepared using atmospheric plasma spray (APS) technique. Through subjecting the coatings to heat treatments within temperatures ranging from 1000 °C to 1500 °C, it becomes possible to tailor the microstructures of the coatings, including phase distribution, porosity level, grain sizes, and interphase spacing. Furthermore, an investigation into the crystallization behavior of YAG and Al₂O₃ phases, as well as the formation mechanism of eutectic-like microstructure in YAG/Al₂O₃ coatings, reveals that YAG phases undergo primary crystallization from the amorphous phase, followed by secondary crystallization of Al₂O₃ phases between YAG crystals. This work provides insights into understanding the relationship between heat treatment temperatures and coating morphologies, as well as elucidates the formation mechanism of eutectic-like microstructure, thereby guiding the controlled preparation of YAG/Al₂O₃ coatings via APS technique.

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引用次数: 0

Investigation of rotational magnetic field assisted hot filament chemical vapor deposition for diamond film growth 旋转磁场辅助热丝化学气相沉积法用于金刚石薄膜生长的研究

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2024-11-22 DOI: 10.1016/j.surfcoat.2024.131588

Fung Ming Kwok , Xinyu Du , Zhanwen Sun , Man Cheung Ng , Wai Sze Yip , Kwong Yu David Kwok , Suet To

This study investigates the role of magnetic fields in Hot Filament Chemical Vapor Deposition (HFCVD), revealing their remarkable ability to precisely control film characteristics. The study confirms the ability of this novel technology to produce uniformly high-quality diamond films by examining a variety of magnetic orientations and rotational velocity, as well as a control with no magnetic field, both experimentally and through simulation. It is discovered that magnetic fields contribute to enhance deposition consistency and grain size regulation, with the SN (South-North) orientation producing the most effective results. The SN orientation yields the most consistent diamond film thicknesses, with values clustering around 7.3 μm at the center and 7.66 μm at the edges, outperforming the SS (South-South) orientation and NMF (no magnetic field) condition. The study also shows that magnetic field integration improves film uniformity and significantly increases thermal distribution, resulting in more efficient thermal management profiles. These findings highlight the potential of HFCVD with magnetic field assistance to create particular diamond films, increasing its importance in advanced thermal management and broadening its application landscape in industries requiring precise film characteristics.

本研究调查了磁场在热丝化学气相沉积（HFCVD）中的作用，揭示了磁场精确控制薄膜特性的非凡能力。研究通过实验和模拟，对各种磁场方向和旋转速度以及无磁场对照进行了研究，从而证实了这项新技术生产均匀优质金刚石薄膜的能力。结果发现，磁场有助于提高沉积一致性和晶粒大小的调节，其中 SN（南-北）方向产生的效果最好。SN 方向产生的金刚石薄膜厚度最为一致，中心值为 7.3 μm，边缘值为 7.66 μm，优于 SS（南北）方向和 NMF（无磁场）条件。研究还表明，磁场集成改善了薄膜的均匀性，并显著增加了热分布，从而实现了更高效的热管理剖面。这些发现凸显了 HFCVD 在磁场辅助下生成特殊金刚石薄膜的潜力，提高了其在先进热管理中的重要性，并拓宽了其在要求精确薄膜特性的行业中的应用范围。

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引用次数: 0

Adhesion and friction-wear characterization of W-doped hydrogenated diamond-like carbon (a-C:H) coatings 掺杂 W 的氢化类金刚石碳 (a-C:H) 涂层的附着力和摩擦磨损特性分析

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2024-11-22 DOI: 10.1016/j.surfcoat.2024.131578

Ihsan Efeoglu, Yasar Totik, Gokhan Gulten, Banu Yaylali, Mustafa Yesilyurt

The aerospace, automotive, and defense industries extensively use AISI 4130 alloy steel, a significant material type for most engineering applications in the industry, due to its crucial characteristics, such as high strength, durability, machinability, and corrosion resistance. In this study, enhancing the surface mechanical and tribological properties of the material with tungsten (W)-doped diamond-like carbon (DLC) coatings emerges as a prominent approach to improving performance. Amorphous hydrogenated diamond-like carbon (a-C:H) coating has outstanding mechanical and tribological properties. In this study, W-doped a-C:H-DLC coatings have been deposited on AISI 4130 using closed-field unbalanced magnetron sputtering. A L9 orthogonal array of the Taguchi method was utilized to optimize the variable coating parameters applied in the magnetron sputtering process. The microstructure and thickness of the W-doped a-C:H-DLC coatings were examined using scanning electron microscopy. Raman spectroscopy was used to characterize the structure of these DLC coatings. The hardness values of the coatings were determined using the Knoop microhardness test. The scratch test method was used to examine the adhesion properties of the coatings by determining their critical load values at which coating delamination occurred. The tribological behavior of uncoated AISI 4130 substrate and coating was determined with a pin-on-disc tribometer against an Al₂O₃ ball under dry sliding conditions. Delamination and gradual failures occurring in the wear test of the uncoated specimen increased the friction coefficient. On the contrary, the coating exhibits such superior tribological properties that the friction coefficient decreased due to the prevention of delamination and gradual failures to a certain extent. It was observed that the scratch-adhesion properties of the coated specimens significantly contributed to the improvement of tribological performance. These thin films are particularly valued for their ability to provide high wear resistance and low coefficients of friction, properties that are critical to industries that deal with harsh conditions, such as automotive and aerospace.

航空航天、汽车和国防工业广泛使用 AISI 4130 合金钢，因为它具有高强度、耐用性、可加工性和耐腐蚀性等重要特性，是该行业大多数工程应用的重要材料类型。在这项研究中，使用掺杂钨（W）的类金刚石碳（DLC）涂层增强材料的表面机械性能和摩擦学性能成为提高性能的一个重要方法。无定形氢化类金刚石碳（a-C:H）涂层具有出色的机械和摩擦学性能。在这项研究中，使用闭场不平衡磁控溅射技术在 AISI 4130 上沉积了掺 W 的 a-C:H-DLC 涂层。采用田口方法的 L9 正交阵列来优化磁控溅射过程中应用的可变涂层参数。使用扫描电子显微镜检查了掺 W a-C:H-DLC 涂层的微观结构和厚度。拉曼光谱用于表征这些 DLC 涂层的结构。涂层的硬度值是通过努氏显微硬度测试确定的。划痕测试法通过确定涂层脱层的临界载荷值来检验涂层的附着特性。在干滑动条件下，使用针盘摩擦磨损试验机测定了未涂层 AISI 4130 底材和涂层与 Al2O3 球的摩擦学行为。未涂层试样在磨损测试中出现的分层和逐渐失效增加了摩擦系数。相反，涂层具有卓越的摩擦学特性，在一定程度上防止了分层和渐变破坏，从而降低了摩擦系数。据观察，涂层试样的划痕粘附性能大大有助于提高摩擦学性能。这些薄膜具有高耐磨性和低摩擦系数的特点，这些特性对于汽车和航空航天等条件恶劣的行业至关重要，因此尤其受到重视。

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引用次数: 0

Microstructural and tribological properties of multilayered coatings developed through heat treatment on the surface of CP-Ti 通过热处理在 CP-Ti 表面形成的多层涂层的微观结构和摩擦学特性

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2024-11-22 DOI: 10.1016/j.surfcoat.2024.131590

Morteza Abedini, Stefanie Hanke

It is well known that applying NiTi intermetallic coatings on the surface of different alloys can improve their tribological behavior. In this paper, various intermetallic phases of Ni₃Ti, NiTi, and NiTi₂ and a Ti-rich pearlite-like eutectoid structure were in situ synthesized on the surface of commercially pure (CP) titanium grade 2. Nickel electroplating was performed on titanium samples followed by heat treatment at a temperature of 800 °C for various times up to 8 h. The formation of various phases and structures along the depth were studied using SEM, EDS and XRD. Heat treatment at a temperature of 800 °C for 4 h resulted in the formation of a multi-layered composite of Ni₃Ti, NiTi, and NiTi₂ intermetallic films with a thickness of 5, 9, and 2 μm, respectively. A nickel diffusion layer (NDL) with a pearlitic structure containing nanolayers of αTi-NiTi₂ was also formed beneath the NiTi₂ layer even after 30 min of heating. Among the different layers formed on the surface of CP-Ti, the titanium-rich NiTi (51–52 at.% Ti) showed the highest hardness of more than 400 HV. Sliding wear tests were performed under a normal load of 10 N and the surfaces of wear tracks were studied using SEM. The results showed higher wear resistance of all intermetallic layers and NDL than the titanium substrate, with the highest wear resistance for Ni₃Ti top layer.

众所周知，在不同合金表面涂覆镍钛金属间化合物涂层可以改善其摩擦学性能。本文在市售纯 (CP) 2 级钛表面原位合成了 Ni3Ti、NiTi 和 NiTi2 的各种金属间相以及富钛珠光体共晶结构。在钛样品上进行电镀镍，然后在 800 °C 的温度下进行不同时间（最长 8 小时）的热处理。在 800 ℃ 的温度下热处理 4 小时后，形成了多层复合的 Ni3Ti、NiTi 和 NiTi2 金属间薄膜，厚度分别为 5、9 和 2 μm。甚至在加热 30 分钟后，在 NiTi2 层下还形成了珠光体结构的镍扩散层 (NDL)，其中包含 αTi-NiTi2 纳米层。在 CP-Ti 表面形成的不同层中，富钛 NiTi（钛含量为 51-52%）的硬度最高，超过 400 HV。在 10 N 的正常载荷下进行了滑动磨损试验，并使用扫描电镜研究了磨损痕迹的表面。结果表明，所有金属间层和 NDL 的耐磨性均高于钛基底，其中 Ni3Ti 表层的耐磨性最高。

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引用次数: 0

Divacancy graphene and graphyne as potential biomedical sensors: A first-principles study 作为潜在生物医学传感器的二价石墨烯和石墨乙烯：第一原理研究

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2024-11-22 DOI: 10.1016/j.surfcoat.2024.131586

Manoj N. Mattur , El-Abed Haidar , Oliver J. Conquest , Catherine Stampfl

Imbalance in the levels of hydrogen peroxide signals the onset of chronic diseases in our body. Thus, it becomes imperative to design simple material systems with single molecule sensitivity. In this study, we investigate graphene and graphyne based systems by including various vacancy structures to assess their potential as H₂O₂ sensor materials. From the computed adsorption energies, we select two promising candidates, interestingly both are divacancies in graphene and graphyne. We then investigate electron transport in both the systems using the DFT-NEGF approach. Upon adsorption of H₂O₂ on the 585 vacancy (a special case of divacancy) in graphene and divacancy graphyne monolayers, we observe distinguishing current-voltage and electron transmission characteristics, in particular, in the former. For the 585 divacancy graphene system through analysis of the electronic properties, we identify the underlying mechanisms responsible for the difference in current values between the clean and H₂O₂ adsorbed systems, and hence its sensing ability. This work opens up a new avenue of intelligently incorporating vacancy defects in cheaper carbon-based 2D materials to effectively serve as potentially highly sensitive and selective biosensors for early disease detection.

过氧化氢水平的失衡预示着人体慢性疾病的发生。因此，设计具有单分子灵敏度的简单材料系统变得势在必行。在本研究中，我们研究了石墨烯和基于石墨烯的系统，包括各种空位结构，以评估它们作为 H2O2 传感器材料的潜力。从计算得出的吸附能中，我们选择了两种有前景的候选材料，有趣的是这两种材料都是石墨烯和石墨炔中的空位。然后，我们利用 DFT-NEGF 方法研究了这两个系统中的电子传输。当 H2O2 吸附在石墨烯中的 585 空位（空位的一种特例）和空位石墨烯单层上时，我们观察到了不同的电流-电压和电子传输特性，尤其是前者。通过分析电子特性，我们确定了 585 空位石墨烯体系的电子特性，从而确定了清洁体系与吸附 H2O2 体系之间电流值差异的基本机制，并确定了其传感能力。这项工作开辟了一条新途径，即在廉价的碳基二维材料中智能地加入空位缺陷，从而有效地作为潜在的高灵敏度和选择性生物传感器，用于早期疾病检测。

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引用次数: 0

Exploring effects of molybdenum and titanium contents on microstructure and mechanical properties of CoCrNi medium entropy alloy films 探索钼和钛含量对 CoCrNi 中熵合金薄膜微观结构和机械性能的影响

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2024-11-22 DOI: 10.1016/j.surfcoat.2024.131587

Pin-Yu Chen, Pei-Yu Chen, Jhen-De You, Chun-Hway Hsueh

Medium entropy alloys (MEAs), such as CoCrNi, have demonstrated a unique combination of high hardness and excellent ductility, surpassing many high entropy alloys reported to date. In this study, we investigated the effects of Mo and Ti additions on the microstructures and mechanical properties of (CoCrNi)_100–x–yMo_xTi_y MEA films (MEAFs). Mo/Ti-doped CoCrNi MEAFs were deposited on Si substrates using magnetron three-target co-sputtering. While the power applied on CoCrNi target was fixed at 200 W, the same power was applied on Mo and Ti targets which varied from 0 to 90 W. For simplicity, the film was denoted as MoTi80 when Mo and Ti targets were subjected to 80 W power, and so on. X-ray diffraction and TEM SAED results revealed a structural transformation from FCC to FCC + HCP at MoTi50 (x = 3.52, y = 1.36) due to HCP Ni₃Ti precipitation. With further increases in Mo and Ti contents, MoTi80 (x = 6.48, y = 2.52) exhibited a mixed nanocrystalline and amorphous structure, while MoTi90 (x = 8.98, y = 3.59) became fully amorphous. The mechanical properties of the films were investigated using nanoindentation and micropillar compression tests. With the additions of Mo and Ti, the maximum yield strength of 5.87 GPa and hardness of 11.96 GPa were obtained at MoTi70 (x = 6.27, y = 2.44) and then decreased with the higher Mo and Ti contents. The addition of small amounts of Mo and Ti strengthened CoCrNi MEAFs mainly due to solid solution strengthening and grain boundary strengthening.

CoCrNi 等中熵合金 (MEA) 具有高硬度和优异延展性的独特组合，超过了迄今为止报道的许多高熵合金。在本研究中，我们研究了添加 Mo 和 Ti 对 (CoCrNi)100-x-yMoxTiy MEA 薄膜 (MEAF) 的微观结构和机械性能的影响。使用磁控管三靶共溅射技术在硅基底上沉积了掺杂了 Mo/Ti- 的 CoCrNi MEAF。钴铬镍靶的功率固定为 200 W，而钼和钛靶的功率则从 0 W 到 90 W 不等。X 射线衍射和 TEM SAED 结果表明，在 MoTi50 时（x = 3.52，y = 1.36），由于 HCP Ni3Ti 沉淀，结构从 FCC 转变为 FCC + HCP。随着 Mo 和 Ti 含量的进一步增加，MoTi80（x = 6.48，y = 2.52）呈现出纳米晶和非晶的混合结构，而 MoTi90（x = 8.98，y = 3.59）则完全变成了非晶。利用纳米压痕和微柱压缩试验研究了薄膜的机械性能。随着 Mo 和 Ti 的添加，MoTi70（x = 6.27，y = 2.44）的屈服强度和硬度分别达到 5.87 GPa 和 11.96 GPa，然后随着 Mo 和 Ti 含量的增加而降低。添加少量 Mo 和 Ti 可强化 CoCrNi MEAF，这主要是由于固溶强化和晶界强化。

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引用次数: 0

Influence of deposition parameters on the formation of surface cracks in segmented APS-TBCs 沉积参数对分段式 APS-TBC 表面裂纹形成的影响

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2024-11-21 DOI: 10.1016/j.surfcoat.2024.131565

Liuyu Yang , Yiwen Chen , Dingjun Li , Peng Jiang

Segmented structure featuring channeled surface cracks has been identified as a highly exceptional type of air plasma spray (APS) thermal barrier coating system (TBCs) with remarkable strain tolerance and long-term serviceability. However, the underlying mechanisms governing the relationship between deposition parameters and segmental cracking responsible for surface crack formation in APS-TBCs remain incompletely elucidated. In this article, we conducted experimental analysis to investigate the sensitivity of five chosen deposition parameters on the induced peak quenching stress in top coat (TC) during fabrication. Subsequently, we established a quantitative relationship between the five deposition parameters and the peak quenching stress, enhancing our understanding of how these parameters influence segmental cracking. During our investigation, we monitored in-flight particle parameters using the DVP-2000 equipment and coating mechanical parameters using a self-developed real-time curvature measurement equipment under different deposition conditions. This allowed us to further analyze the correlations between particle and coating parameters. Based on their relative impact on peak quenching stress, we determined that the sensitivity of these five deposition parameters on segmental cracking is as follows: deposition power > deposition speed > preheating cycles > deposition distance > feed rate. Furthermore, we recommend setting optimum deposition parameters as follows: highest power, lowest speed, highest preheating cycles, lowest distance, and lowest feed rate to improve the possibility of fabricating segmented APS-TBCs with higher density of surface cracks.

具有通道状表面裂纹的分段结构已被确定为空气等离子喷涂（APS）隔热涂层系统（TBCs）的一种非常特殊的类型，具有显著的应变耐受性和长期适用性。然而，APS-TBC 表面裂纹形成的沉积参数与分段裂纹之间的内在机理仍未完全阐明。在本文中，我们进行了实验分析，研究了所选的五个沉积参数对制造过程中表面涂层（TC）中的诱导峰值淬火应力的敏感性。随后，我们建立了五个沉积参数与峰值淬火应力之间的定量关系，加深了我们对这些参数如何影响分段开裂的理解。在研究过程中，我们使用 DVP-2000 设备监测了不同沉积条件下的飞行粒子参数，并使用自主开发的实时曲率测量设备监测了涂层机械参数。这使我们能够进一步分析颗粒和涂层参数之间的相关性。根据它们对淬火应力峰值的相对影响，我们确定这五个沉积参数对段裂纹的敏感性如下：沉积功率；沉积速度；预热周期；沉积距离；进料速率。此外，我们建议将最佳沉积参数设置为：最高功率、最低速度、最高预热周期、最小距离和最低进给速率，以提高制造表面裂纹密度更高的分段式 APS-TBC 的可能性。

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引用次数: 0

Influence of Ta and Y co-alloying on the structure, mechanical, and thermal properties of TiAlN coatings Ta 和 Y 共合金化对 TiAlN 涂层的结构、机械和热性能的影响

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2024-11-21 DOI: 10.1016/j.surfcoat.2024.131581

Jia J. Li , Xu Sun , Li Chen , Yu X. Xu , She Q. Wang

Alloying is commonly recognized as an efficient method to enhance the high-temperature properties of TiAlN coatings. In this study, a series of Ti_{1−x−y−z}Al_xTa_yY_zN (0.01 ≤ y ≤ 0.06, 0.01 ≤ z ≤ 0.06) coatings with similar Al content was investigated, concerning phase structure, thermal stability, and oxidation resistance. The presence of an excessive Y-content in Ti_0.41Al_0.52Ta_0.01Y_0.06N and Ti_0.41Al_0.52Ta_0.02Y_0.05N coatings causes a mixed cubic and wurtzite structure, leading to reduced hardness. A single-phase cubic structure was obtained by low Y-containing Ti_{1−x−y−z}Al_xTa_yY_zN coatings with z ≤ 0.03. Among them, the Ti_0.41Al_0.52Ta_0.05Y_0.02N coating obtains the highest hardness value of 34.3 ± 0.9 GPa in the as-deposited state. Moreover, the thermal stability and oxidation resistance of the Ti_0.46Al_0.54N coating were significantly improved by co-alloying with Ta and Y. Upon annealing at 900 °C, the Ti_0.41Al_0.52Ta_0.05Y_0.02N coating shows a peak hardness of 35.8 ± 1.4 GPa. Increasing Ta-content and decreasing Y-content give rise to a decline in oxide scale thickness when exposed to air at 900 °C for 10 h. However, the Ti_0.41Al_0.52Ta_0.05Y_0.02N coatings exhibit the best oxidation resistance after oxidation at 1000 °C for 15 h with an oxide scale of ~3.24 μm. In general, the Ti_0.41Al_0.52Ta_0.05Y_0.02N coatings showed the best comprehensive performance in this work.

合金化是公认的提高 TiAlN 涂层高温性能的有效方法。本研究对一系列铝含量相近的 Ti1-x-y-zAlxTayYzN（0.01 ≤ y ≤ 0.06，0.01 ≤ z ≤ 0.06）涂层的相结构、热稳定性和抗氧化性进行了研究。在Ti0.41Al0.52Ta0.01Y0.06N和Ti0.41Al0.52Ta0.02Y0.05N涂层中，Y含量过高会导致立方和沃特兹混合结构，从而降低硬度。z≤0.03的低含Y的Ti1-x-y-zAlxTayYzN镀层获得了单相立方结构。其中，Ti0.41Al0.52Ta0.05Y0.02N涂层在沉积状态下获得了34.3 ± 0.9 GPa的最高硬度值。此外，通过与 Ta 和 Y 共合金化，Ti0.46Al0.54N 涂层的热稳定性和抗氧化性得到了显著改善。在 900 °C 退火后，Ti0.41Al0.52Ta0.05Y0.02N 涂层的峰值硬度为 35.8 ± 1.4 GPa。在 900 °C 的空气中暴露 10 小时后，Ta 含量的增加和 Y 含量的减少会导致氧化鳞片厚度的下降。然而，在 1000 °C 氧化 15 小时后，Ti0.41Al0.52Ta0.05Y0.02N 涂层表现出最佳的抗氧化性，氧化鳞片约为 3.24 μm。总的来说，在这项工作中，Ti0.41Al0.52Ta0.05Y0.02N 涂层的综合性能最好。

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引用次数: 0

Asymmetrical magnetoimpedance on Permalloy/Ag multilayer for high-frequency sensor applications 用于高频传感器应用的坡莫合金/银多层板非对称磁阻

IF 5.3 2区材料科学 Q1 MATERIALS SCIENCE, COATINGS & FILMS

Surface & Coatings Technology

Pub Date : 2024-11-21 DOI: 10.1016/j.surfcoat.2024.131580

A. de Moraes , F. Bohn , M. Gamino , E.F. da Silva , D.F. de Oliveira , C. Lopes , A. Ferreira , F. Vaz , M.A. Correa

The asymmetrical magnetoimpedance effect has a great appeal for sensor application due to the possibility of tuning a linear response near zero magnetic field. Usually, for a given thin film geometry, this response is obtained considering two distinct ferromagnetic materials separated by a non-ferromagnetic metal. Here a new route to obtain the asymmetrical magnetoimpedance response considering just one ferromagnetic material is presented. More specifically, Ni₈₁Fe₁₉ (Py)/Ag multilayer where the modification of the ferromagnetic properties of the successive Py layers is responsible for the biphasic behavior. These modifications lead to quasi-static magnetization curves with plateaus, which are reflected in the magnetization dynamics as the asymmetrical magnetoimpedance response. To support the presented findings, structural and morphological characterization is considered. The strong linearity at a low magnetic field range allowed to reach the sensitivity of

38 m Ω / Oe

for a frequency of 2.06 GHz. The results simplify the experimental procedure to produce sensor elements with tunable linearity response.

由于可以在零磁场附近调整线性响应，非对称磁阻效应在传感器应用中具有很大的吸引力。通常情况下，对于给定的薄膜几何形状，这种响应是在两种不同的铁磁材料被非铁磁性金属隔开的情况下获得的。这里介绍的是一种仅考虑一种铁磁材料就能获得非对称磁阻响应的新方法。更具体地说，Ni81Fe19（Py）/Ag 多层材料的双相行为是由连续 Py 层的铁磁特性的改变造成的。这些改性导致了具有高原的准静态磁化曲线，在磁化动力学中反映为不对称的磁阻响应。为了支持上述发现，我们考虑了结构和形态特征。在 2.06 GHz 频率下，低磁场范围内的强线性使灵敏度达到 38mΩ/Oe。这些结果简化了生产具有可调线性响应的传感器元件的实验程序。

{"title":"Asymmetrical magnetoimpedance on Permalloy/Ag multilayer for high-frequency sensor applications","authors":"A. de Moraes , F. Bohn , M. Gamino , E.F. da Silva , D.F. de Oliveira , C. Lopes , A. Ferreira , F. Vaz , M.A. Correa","doi":"10.1016/j.surfcoat.2024.131580","DOIUrl":"10.1016/j.surfcoat.2024.131580","url":null,"abstract":"<div><div>The asymmetrical magnetoimpedance effect has a great appeal for sensor application due to the possibility of tuning a linear response near zero magnetic field. Usually, for a given thin film geometry, this response is obtained considering two distinct ferromagnetic materials separated by a non-ferromagnetic metal. Here a new route to obtain the asymmetrical magnetoimpedance response considering just one ferromagnetic material is presented. More specifically, Ni<sub>81</sub>Fe<sub>19</sub> (Py)/Ag multilayer where the modification of the ferromagnetic properties of the successive Py layers is responsible for the biphasic behavior. These modifications lead to quasi-static magnetization curves with plateaus, which are reflected in the magnetization dynamics as the asymmetrical magnetoimpedance response. To support the presented findings, structural and morphological characterization is considered. The strong linearity at a low magnetic field range allowed to reach the sensitivity of <span><math><mn>38</mn><mspace></mspace><mi>m</mi><mi>Ω</mi><mo>/</mo><mi>Oe</mi></math></span> for a frequency of 2.06 GHz. The results simplify the experimental procedure to produce sensor elements with tunable linearity response.</div></div>","PeriodicalId":22009,"journal":{"name":"Surface & Coatings Technology","volume":"495 ","pages":"Article 131580"},"PeriodicalIF":5.3,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142723851","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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