Article
Materials Science, Multidisciplinary
Hideki Nakazawa, Kazuki Nakamura, Hiroya Osanai, Yuya Sasaki, Haruto Koriyama, Yasuyuki Kobayashi, Yoshiharu Enta, Yushi Suzuki, Maki Suemitsu
Summary: In this study, silicon and nitrogen doped diamond-like carbon (Si-N-DLC) films were deposited and annealed to investigate their properties. The results show that the annealing temperature has an effect on the internal stress and critical load of the films. Within a certain temperature range, the annealed Si-N-DLC films exhibit good performance and potential application value. Annealing can reduce defects in the films and improve the current-voltage characteristics of heterojunctions.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Chemistry, Physical
Pierre Tomasini
Summary: The silicon chemical vapor deposition process via silane is determined using classical thermodynamics, showing that a linear function of temperature controls silicon growth rates and neatly maps the response of growth rate activation energy, providing clarity to the parameter space. The study demonstrates the portability of the linear function of temperature across reactors and extracts reactor scaling factors, reducing the complex silicon deposition process to its essentials through thermodynamics.
CHEMISTRY OF MATERIALS
(2021)
Article
Polymer Science
Parand R. Riley, Pratik Joshi, Sina Azizi Machekposhti, Ritesh Sachan, Jagdish Narayan, Roger J. Narayan
Summary: In this study, a silicon-incorporated diamond-like carbon (Si-DLC) coating was used to reduce moisture vapor transmission through a commercial polymer bag material. Various analysis techniques were employed to study the structure of the Si-DLC coating, and testing showed a significant decrease in moisture vapor transmission rate (MVTR) with the coated material. Additionally, water stability tests confirmed the stability of the Si-DLC coatings in contact with water, and peel-off adhesion tests demonstrated the good adhesion of the Si-DLC film even in wet conditions.
Article
Multidisciplinary Sciences
Meiyan Jiang, Chengke Chen, Ping Wang, Difeng Guo, Sijia Han, Xiao Li, Shaohua Lu, Xiaojun Hu
Summary: Researchers have discovered that diamonds are formed from graphite through phase transformation, rather than etching by hydrogen and carbon species piling up, providing a new approach to prepare large-area diamonds based on large-sized graphite under normal pressure. This finding also contributes to the understanding of the growth mechanism of materials with sp(2) and sp(3) electronic configurations.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Physics, Applied
Tim Hosenfeldt
Summary: The three concepts for CO2-neutral and sustainable mobility include the direct use of electrical energy, the conversion of regeneratively generated electricity into green hydrogen, and the generation of synthetic fuels from green hydrogen. Plasma surface technology plays a key role in optimizing highly stressed tribological systems and increasing energy efficiency and CO2 savings.
PLASMA PROCESSES AND POLYMERS
(2022)
Article
Engineering, Mechanical
Yongyao Su, Weijiu Huang, Lixin Cai, Xiaohong Gong, Tengfei Zhang, Rong Hu, Peng Zhang, Haibo Ruan
Summary: The microstructure and tribology property evolution of Mo-doped DLC films were investigated. It was found that a nanocrystal/amorphous structure was formed at high Mo concentration, which had an impact on adhesion and wear resistance.
TRIBOLOGY INTERNATIONAL
(2022)
Article
Materials Science, Multidisciplinary
K. Nakamura, H. Ohashi, Y. Enta, Y. Kobayashi, Y. Suzuki, M. Suemitsu, H. Nakazawa
Summary: The effects of silicon doping on nitrogen-doped diamond-like carbon films were investigated, showing improvements in chemical structure and properties such as reduced cluster formation, increased sp(3) C sites, lower internal stress, and higher optical bandgaps. Additionally, after annealing, Si-N-DLC/p-type Si heterojunctions exhibited rectifying characteristics.
Article
Materials Science, Ceramics
Nur Aszreen Zulkifli, Shahira Liza, Hiroki Akasaka, Kanao Fukuda, Nur Adilah Mohd Rawian, Nur Afieqah Md Ghazazi, Noor Ayuma Mat Tahir, Yazid Yaakob
Summary: Using pulse current and DLC flakes can improve the surface quality and durability of hard anodizing. Increasing the DLC content enhances the hardness and wear resistance of the oxide film, while using 5 g/L DLC in the electrolyte reduces friction.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Coatings & Films
Ippei Tanaka, Hiroshi Okubo, Yasunori Harada
Summary: The study investigates the synthesis of diamonds on three-dimensional metal surfaces using MVP deposition, focusing on how pressure and bias voltage influence the diamond structure. The results show that MVP makes it possible to deposit diamond on 3D shape substrates, with diamond particles created at specific bias voltages and methane concentrations.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Jisu Lee, Daejong Kim, Dongwook Shin, Hyeon-Geun Lee, Ji Yeon Park, Weon-Ju Kim
Summary: Reaction-bonded silicon carbide was fabricated by liquid silicon infiltration using a porous carbon preform prepared by chemical vapor deposition to reduce excess silicon and carbon. The porosity, pore size, and carbon particle size of the material were controlled by adjusting the deposition temperature of the carbon preform. The hardness of the material increased as the amount of residual silicon decreased.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Automation & Control Systems
Vijaykumar S. S. Jatti, Eyob Messele Sefene, Ashwini V. V. Jatti, Akshansh Mishra, Rahul D. D. Dhabale
Summary: This study demonstrates that diamond-like carbon (DLC) coatings optimized through plasma-enhanced chemical vapor deposition (PECVD) process can enhance the performance of drill bits during dry cutting operation of LM6 aluminum alloy and bright mild steel. The DLC coatings were grown over different substrate materials and their properties were measured. The results showed that the DLC-coated substrate had lower wear loss and coefficient of friction than the uncoated substrate, resulting in better surface finish and reduced power consumption during drilling.
INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY
(2023)
Article
Chemistry, Physical
Wen Qian Chen, Yi Heng Cheong, Xiaoxu Fu, Li Ya Ge, Andrei Veksha, Grzegorz Lisak
Summary: The study proposes a method for synthesizing GCN using Fe-assisted CCVD, resulting in higher yield and better functionality, leading to a 3D hierarchically porous material with higher specific capacitance, higher capacitance retention, and lower charge transfer resistance.
Article
Multidisciplinary Sciences
Andrew G. Tomkins, Nicholas C. Wilson, Colin MacRae, Alan Salek, Matthew R. Field, Helen E. A. Brand, Andrew D. Langendam, Natasha R. Stephen, Aaron Torpy, Zsanett Pinter, Lauren A. Jennings, Dougal G. McCulloch
Summary: Ureilite meteorites, which may be the only samples from a dwarf planet's mantle, contain abundant diamonds. Electron microscopy reveals the distribution of lonsdaleite, diamond, and graphite in ureilites, suggesting a formation process involving pseudomorphic replacement of graphite by lonsdaleite, followed by diamond and graphite formation. This process could be used to manufacture shaped lonsdaleite at high pressure and also provides a model that reconciles conflicting observations about diamond formation in ureilites.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2022)
Article
Materials Science, Coatings & Films
Yongyao Su, Weijiu Huang, Junjun Wang, Xiaohong Gong, Tengfei Zhang, Rong Hu, Weijie Yu, Haibo Ruan, Yucheng Ma
Summary: Si and Mo co-doped DLC (Si-MoDLC) films were fabricated using the double-target co-sputtering technology to overcome the challenges posed by high internal stress and weak bonding forces, and achieve exceptional tribological characteristics. The results showed that Si mainly existed in Si-C and Si-O forms, while Mo existed mostly in MoC and Mo forms. The hardness and adhesion of Si-MoDLC films changed with the increase in Si content, and the tribological properties were significantly affected by Si content and the testing environment.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Mikhail Aleksandrovich Lobaev, Alexey Mikhailovich Gorbachev, Dmitry Borisovich Radishev, Anatoly Leontievich Vikharev, Sergey Aleksandrovich Bogdanov, Vladimir Aleksandrovich Isaev, Mikhail Nikolaevich Drozdov
Summary: The study explores the incorporation of silicon in diamond through the growth conditions of epitaxial layers in a CVD reactor using a gas mixture of hydrogen, methane, and silane. Factors such as methane and silane flows, substrate temperature, gas mixture pressure, and substrate misorientation angle were examined. The carbon content in the gas mixture was found to have a significant impact on the incorporation of silicon into diamond. The efficiency of SiV center formation was highest at substrate misorientation angles between 2 and 4 degrees.
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
(2023)
