Article
Chemistry, Physical
Brijmohan Paramanik, Debajyoti Das
Summary: In this study, diamond-like carbon (DLC) films with well distinguished nanocrystalline diamond (NCD) grains embedded in the matrix were grown on glass substrates without any pre-treatment using a specially-designed stainless-steel shadow-mask assembly. The composition of the precursor gas and gas pressure in the plasma significantly influenced the relative composition of different carbon phases in the films. The optimum NCD embedded DLC film exhibited a homogeneous microstructure with uniform distribution of NCD grains and high optical transmittance.
APPLIED SURFACE SCIENCE
(2022)
Article
Materials Science, Coatings & Films
Caroline Hain, David Brown, Alexander Welsh, Krzysztof Wieczerzak, Robert Weiss, Johann Michler, Aicha Hessler-Wyser, Thomas Nelis
Summary: This study investigates the influence of different magnetron sputtering methods and microwave plasma-assisted techniques on the properties of high-hardness diamond-like carbon films, and it is found that microwave plasma can modify the morphology of the films but cannot increase the hardness.
SURFACE & COATINGS TECHNOLOGY
(2022)
Article
Chemistry, Physical
Vladimir Yurov, Andrey Bolshakov, Victor Ralchenko, Irina Fedorova, Artem Martyanov, Pavel Pivovarov, Vladimir Artemov, Andrew Khomich, Roman Khmelnitskiy, Kirill Boldyrev
Summary: This study reports the growth of Ge-doped homoepitaxial diamond films using microwave plasma CVD at moderate pressures, monitoring the plasma with optical emission spectroscopy and confirming successful doping through photoluminescence and Raman spectra. The results suggest that in situ doping with Ge using a GeH4 precursor is a convenient method to control the formation of GeV centers in epitaxial diamond films for photonic applications.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2023)
Article
Engineering, Mechanical
Mohammad Sharear Kabir, Zhifeng Zhou, Zonghan Xie, Paul Munroe
Summary: A series of diamond-like carbon coatings with alternating soft and hard layers were prepared using closed field unbalanced magnetron sputtering. The thickness ratio of the hard-to-soft layers was maintained at approximately 1:1.33 for all coatings. Transmission electron microscopy confirmed the presence of distinct soft and hard layers. Increasing the bias voltage during hard layer deposition resulted in increased residual stress and changed the scratch cracking mechanism. The coatings deposited at a hard layer bias voltage of -100 V showed the best combination of mechanical properties.
Article
Chemistry, Physical
V. Sakthi Murugan, S. Madhu
Summary: Silicon-incorporated diamond-like carbon nanocomposites were prepared using CVD technique with varying acetylene flowrates. The nanocomposites showed improved mechanical properties and tribological performance due to the presence of silicon.
Article
Chemistry, Physical
William G. S. Leigh, Evan L. H. Thomas, Jerome A. Cuenca, Soumen Mandal, Oliver A. Williams
Summary: This study developed an optical model using spectroscopic ellipsometry (SE) to monitor and optimize the critical early stages of polycrystalline diamond growth in real-time.
Article
Chemistry, Physical
William G. S. Leigh, Jerome A. Cuenca, Evan L. H. Thomas, Soumen Mandal, Oliver A. Williams
Summary: This study demonstrates an in-situ method of mapping substrate temperature under MPECVD growth conditions, and compares the temperature maps with simulated plasma electron densities. The results show an increase in temperature and simulated plasma density towards the center of the substrate holder. Properties of nanocrystalline diamond films, measured using ex-situ Raman spectroscopy and spectroscopic ellipsometry, also demonstrate the impact of substrate temperature inhomogeneity during growth.
Article
Chemistry, Multidisciplinary
Weihua Wang, Bing Dai, Guoyang Shu, Yang Wang, Shishu Fang, Shilin Yang, Xuedong Liu, Benjian Liu, Ruibin Xue, Jiwen Zhao, Kang Liu, Lei Yang, Jiecai Han, Jiaqi Zhu
Summary: Diamond nucleation on iridium (001) substrates was investigated under different bias conditions, revealing that high-density epitaxial nucleation can be achieved in a narrow bias window. In bias-enhanced growth, the bias current initially decreases, then increases, indicating a competition mechanism between diamond nucleation and growth.
Article
Materials Science, Multidisciplinary
Jerome A. Cuenca, Soumen Mandal, Evan L. H. Thomas, Oliver A. Williams
Summary: This study presents a microwave plasma model to investigate the spatial heteroepitaxial growth of polycrystalline diamond on Si in a chemical vapor deposition reactor. The model demonstrates radial variation in growth rate over small samples with different sample holders. Experimental validations using Raman spectroscopy and scanning electron microscopy are conducted. The results reveal the importance of sample holder design for achieving uniform diamond films.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Multidisciplinary Sciences
Ali Can Yilmaz, Mehmet Esen
Summary: The goal of this study is to understand the effects of N-2 incorporation in DLC coatings in terms of carbon bond formation and to investigate the tribological behavior of the coating. The study shows that DLC/NCD film improves tribological performance under harsh friction conditions, leading to reduced fuel consumption and cleaner and more efficient engines.
ARABIAN JOURNAL FOR SCIENCE AND ENGINEERING
(2022)
Article
Materials Science, Multidisciplinary
Mohammad Sharear Kabir, Zhifeng Zhou, Zonghan Xie, Paul Munroe
Summary: New multilayer coatings were produced by incorporating alternating soft and hard DLC layers onto a Cr/CrCx graded layer via CFUBMS, maintaining a constant hard-to-soft layer thickness ratio. The coatings exhibited sharp interfaces between soft and hard layers, increased hardness correlated with increased sp(3) content, and excellent plastic deformation resistance and adhesion strength. Further investigations are needed to assess coating durability, but the multilayer design offers a unique opportunity to combine high hardness with damage resistance without the need for complex multilayer systems.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2021)
Article
Engineering, Mechanical
Changning Bai, Zhenbin Gong, Lulu An, Li Qiang, Junyan Zhang, Georgy Yushkov, Alexey Nikolaev, Maxim Shandrikov, Bin Zhang
Summary: The study focuses on the effects of different plasma pretreatments, including Ar, O-2, N-2, and H-2, on the adhesion and friction performance of DLC films deposited on rubber surfaces. Ar plasma pretreatment improves adhesion by forming a compact layer, while O-2, N-2, and H-2 expose fillers on the rubber surface and lead to micrometer-scale patches on the DLC/rubber surface. Among the pretreatments, Ar plasma treatment shows the best friction performance with a low and stable friction coefficient of 0.19 and superior wear resistance.
Review
Automation & Control Systems
Funsho Olaitan Kolawole, Olawale Samson Kolade, Sefiu Adekunle Bello, Shola Kolade Kolawole, Aduramigba Toluwani Ayeni, Temidayo Foluso Elijah, Sunday Gbenga Borisade, Andre Paulo Tschiptschin
Summary: Diamond-like carbon (DLC) coatings have gained wide attraction in the automobile industry due to their excellent properties, but the adhesion to metallic substrate needs improvement. Interlayers and doping elements are used to reduce thermal mismatch and internal compressive stress, respectively. This review article focuses on the deposition techniques, characterisation techniques, and improvement of adhesion properties of DLC coatings on metallic substrates, highlighting Cr-based interlayers and W/WC dopants as efficient ways to enhance adhesion for automotive tribological and tribo-corrosion applications.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Chemistry, Multidisciplinary
Sumanta Kumar Sahoo, Ravi Bolagam, Kripasindhu Sardar, Satoru Kaneko, Shih-Chen Shi, Kao-Shuo Chang, Masahiro Yoshimura
Summary: A new soft solution process has been developed for patterning diamond-like carbon (DLC) onto silicon substrates in ambient conditions. In this technique, pure ethanol is locally activated and anodically patterned onto the substrate with the assistance of submerged plasma. The physical and chemical properties of the DLC patterns were analyzed, and the technique was found to be promising for carbon-based electrode fabrication processes.
Article
Materials Science, Multidisciplinary
Yoshinao Iwamoto, Yuki Hirata, Ryota Takamura, Hiroki Akasaka, Naoto Ohtake
Summary: A method of depositing diamond-like carbon (DLC) films on the inner surface of metal tubes using a nanopulse power source is developed. The plasma state inside the tubes and its effect on DLC film deposition are studied by optical emission spectroscopy and numerical simulation.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Materials Science, Coatings & Films
Yanchun Xie, Xiaodong Wang, Shenshen Cui, Jiali Hu, Yongcun Wei, Yi Lian, Anwu Xuan, Bin Yu, Erlin Zhang
Summary: In this study, Ti-xFe (x = 3,5,9 wt%) alloys were surface modified by micro-arc oxidation (MAO) to improve their antimicrobial properties and biocompatibility. The results showed that increasing the oxidation voltage greatly enhanced the roughness and hydrophilicity of Ti-xFe-MAO alloys. The Ti-xFe alloys micro-arc oxidized at 250 V and 300 V exhibited improved corrosion resistance and excellent antimicrobial and cytocompatibility properties, making them suitable for orthopedic implant materials.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Yuting Hao, Zuoyan Ye, Lili Wang, Minheng Ye, Hui Dong, Chao Wang, Yunchen Du
Summary: This study focuses on the modification of PEO coatings on Ta-12W alloy using NH4F additive. The results show that ultra-low porosity coatings can be prepared by optimizing the NH4F content. The formation process of specific structures on the coating surface is discussed, and the effects of NH4F concentration and treatment duration on coating characteristics are investigated.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Yuanzhuo Liu, Linjiang Chai, Tao Yang, Chaodan Hu, Chuanmei Wang, Guoqiang Xi
Summary: By employing a pulsed laser, laser cladding was performed on IN718 alloy pre-coated with CrCoNi-TiC/SiC powders and three defect-free coatings were successfully prepared. The addition of TiC and SiC powders generated fine carbides dispersed in the coatings and led to changes in grain and substructure morphologies, resulting in increased hardness and wear resistance.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
M. Ghaemi, A. Lopez-Cazalilla, K. Sarakinos, G. J. Rosaz, C. P. A. Carlos, S. Leith, S. Calatroni, M. Himmerlich, F. Djurabekova
Summary: The use of high-power impulse magnetron sputtering can result in dense and uniform niobium films on all surfaces of superconducting rf cavities, as simulated and investigated in this study.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Jiaheng Du, Xinli Fan, Dongqin Xiao, Wuxiang Wang, Yiran Yin, Zhong Li, Kui He, Yanfei Tan, Jiyuan Yan, Gangli Liu, Ke Duan
Summary: This study investigated the electrophoretic deposition (EPD) of magnesium oxide (MgO) coatings on micro-arc oxidized titanium (MAO-Ti) and evaluated their in vitro antibacterial properties and biocompatibility. The results showed that MgO coatings significantly reduced bacterial numbers and biofilm formation, while also demonstrating good cytocompatibility and induction of osteoblast mineralization.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Samiksha Moharana, Yuichi Otsuka, R. Gnanamoorthy
Summary: The addition of titania to HAp coatings improves their wear resistance and reduces damage to titanium implants caused by debris generation. This study evaluates the fretting wear resistance of titania-added HAp suspension plasma spray coating and finds that it exhibits reduced friction coefficient and increased wear resistance.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Li-Ping Wu
Summary: The functional hazenite coating deposited on AZ31 Mg alloy showed improved roughness and hydrophilicity, enhanced biocompatibility, reduced degradation rate, and decreased susceptibility to stress corrosion cracking.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Ning Tian, Delei Xu, Jinfei Wei, Bucheng Li, Junping Zhang
Summary: This study reports the preparation of a superhydrophobic and anti-bacterial fabric for face masks. The fabric exhibits high superhydrophobicity and excellent moisture resistance, enabling functionality effectiveness in cold weather conditions. The fabric also demonstrates remarkable anti-bacterial activity against E. coli, attributed to the synergistic effect of superhydrophobicity and embedded ZnO nanoparticles. This superhydrophobic anti-bacterial fabric holds great potential for various practical applications in personal protective equipment, healthcare, and disease prevention.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Katharina Beck, Anke S. Ulrich, Andreas K. Czerny, Emma M. H. White, Martin Heilmaier, Mathias C. Galetz
Summary: Refractory metal based alloys have great potential as structural materials for high-temperature applications due to their high melting points. However, they are prone to catastrophic oxidation at around 700 degrees C. This study investigated the effect of aluminium diffusion coatings on the oxidation resistance of pure molybdenum, niobium, tantalum, and tungsten. The results showed that the aluminization improved the oxidation behavior and decreased the oxide growth rate for molybdenum and tantalum.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Wenwen Shuai, Haijun Dou, Zhichen Guan, Wei Qian, Zhibao Li, Yinqun Hua, Jie Cai
Summary: This study synthesized (Y1-xLax)3Al5O12 (x = 0, 0.1, 0.2, 0.3) materials by doping lanthanum ions, and found that the doped materials exhibited improved mechanical properties and thermal expansion coefficient, as well as enhanced resistance to CMAS corrosion. These materials have potential applications.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Xianglei Liu, Jiahui Ding, Wanbo Hou, Xinhao Shi, Tao Feng, Xiangyuan Meng, Shifeng Wen, Mingde Tong, Zhufeng Yue
Summary: A composite coating was developed to improve the adhesion, wear resistance, and corrosion resistance, which exhibited significant enhancements in these properties.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Hongxuan Xing, Jidong Li, Xianwei Hu, Liang Tian, Renyun Zhang, Yiyong Wang
Summary: By depositing a Cu/Co-Mo corrosion-resistant plating layer on the surface of 6061 Al alloy, the bonding strength between the alloy and the plating layer can be improved and the corrosion resistance can be enhanced. The composite coating forms an obvious three-layer structure with Co-Mo coating exhibiting amorphous characteristics and Co3Mo phase composition. The composite coating improves the corrosion resistance and hardness of the substrate, effectively protecting the 6061 Al alloy.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Fan Yang, Debin Wang, Tianrun Li, Baijun Yang, Suode Zhang, Jianqiang Wang
Summary: The impact-corrosion behavior of monolayer and hierarchical Fe-based amorphous coatings fabricated by HVAF was investigated in 3.5 wt% NaCl solution. The monolayer coating exhibits corrosion failure with increased impact energy, while the hierarchical coating shows improved resistance. However, at high impact energies, both coatings experience corrosion degradation.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Shoaib Ahmad, Muddasir Nawaz, Solaiman Mohammad, R. A. Shakoor, Ramazan Kahraman, Talal Mohammed Al Tahtamouni
Summary: This research presents a novel self-healing anti-corrosion composite coating that demonstrates higher inhibition efficiency and self-healing effect, providing protection for metallic structures against corrosive environments.
SURFACE & COATINGS TECHNOLOGY
(2024)
Article
Materials Science, Coatings & Films
Hui-Wen Peng, Chun-Hway Hsueh
Summary: A series of (CoCrNi)100-x-ySixNdy medium entropy alloy films with manipulated metalloid element, Si, and rare earth element, Nd, were synthesized using magnetron three-target co-sputtering. The films showed different structures and mechanical properties with varying Si and Nd contents. The optimized mechanical properties were observed in the film with Si0.61Nd5.14, attributed to precipitation strengthening and grain refinement.
SURFACE & COATINGS TECHNOLOGY
(2024)