Article
Materials Science, Multidisciplinary
Supriyo Roy, Bal Mukund Mishra, Goutam Kumar Bose
Summary: Copper-based alloy coatings are suitable for corrosion protection, while poly-alloy and composite coatings are preferred for tribological applications. Results show that annealing at specific temperatures can enhance the hardness and elastic modulus of the coatings, reducing wear rate and coefficient of friction.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Materials Science, Multidisciplinary
S. E. Shakib, A. Babakhani, M. Kashefi Torbati
Summary: This research investigates the deposition of various hard Ti-based coatings on steel substrates using the physical vapor deposition (PVD) technique. The graded coatings were evaluated through phase composition analysis and spectroscopy. Microstructural characterization was conducted using XPS, SEM, and TEM. The findings suggest that integrating a Ti interlayer with subsequent TiN/TICN layers can result in enhanced mechanical and tribological behavior. The elastic modulus, hardness, and yield strength of the coatings were determined by nanoindentation. The microscopic performance of the coatings was analyzed using load-displacement curves obtained from both nanoindentation and nano scratch tests.
JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
(2023)
Article
Engineering, Mechanical
P. K. Farayibi, J. Hankel, F. van Gen Hassend, M. Bluem, S. Weber, A. Roettger
Summary: This study investigates the scratch resistance of a heat-treated stainless steel densified under vacuum and a nitrogen atmosphere. It is found that the nitrogen-sintered steel sample, deep cryogenically treated, exhibits better scratch resistance due to effective load transfer between the hard phases and the matrix.
Article
Materials Science, Ceramics
Fenglin Gu, Hongtu He, Laixi Sun, Fang Wang, Qiuju Zheng, Jiaxin Yu
Summary: The role of graphene on indentation and scratch properties of soda lime silicate (SLS) glass is investigated in this study. It is found that graphene-coated glass has higher nanohardness and reduced modulus, as well as improved nanoscratch resistance. Furthermore, graphene can reduce subsurface damage and increase Vickers hardness and indentation fracture toughness of the glass.
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2022)
Article
Green & Sustainable Science & Technology
Hanzhou Ye, Bright Asante, Goran Schmidt, Andreas Krause, Yang Zhang, Zhiming Yu
Summary: The interaction between geopolymer and wood cell wall in geopolymer-wood composites was investigated using SEM-EDS, UMSP, nanoindentation, and nanoscratch. It was found that lignin may migrate from the wood cell wall to the surface of the geopolymer and contribute to geopolymer production without damaging the wood cell wall. Geopolymer mineralized and hardened the surfaces of wood cell walls, and the width of the interaction region was approximately 7.65 & mu;m depending on the friction coefficients.
JOURNAL OF CLEANER PRODUCTION
(2023)
Article
Chemistry, Physical
Byeonghwa Goh, Joonmyung Choi
Summary: This work investigates the subsurface mechanical behavior of a diamond-structured nanocarbon particle and a copper substrate at nanocontact using molecular dynamic simulations. It analyzes the bidirectional distribution of deformation energy and suggests a methodology for dealing with nanoscale contacts in classical mechanics of materials.
SURFACES AND INTERFACES
(2021)
Article
Chemistry, Physical
Tuong Ly Kiet Dao, Anh Kiet Tieu, Bach Hoang Tran, Sang The Pham
Summary: In this study, it was found that five out of eight LDHs could induce hierarchical protective tribofilms, reducing wear and friction loss. Co-based tribofilms showed the best antiwear performance. The mechanical properties of different tribofilms were also demonstrated. The study provides insights into the tribochemical and lubrication mechanisms between LDHs and sliding surfaces.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Applied
Hamzah Bakhti, Thomas Weyrich, Martha Es-Souni, Ayoub Laghrissi, Mohammed Es-Souni
Summary: In this study, hard-anodized aluminum was used as a substrate to support a polymeric anti-biofouling coating based on sulfobetaine methacrylate (pSBMA). The coating demonstrated excellent anti-biofouling properties, with elastic modulus and hardness measurements obtained under wet and dry conditions. The scratch resistance of the coating was also investigated, and finite element models were proposed to analyze stress and strain distributions on the coating surface.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Materials Science, Multidisciplinary
Hongtu He, Zhe Chen, Yen-Ting Lin, Seung Ho Hahn, Jiaxin Yu, Adri C. T. van Duin, Tobias D. Gokus, Slava Rotkin, Seong H. Kim
Summary: Using nanoscale infrared spectroscopy and reactive molecular dynamics simulations, the subsurface structural changes of silica upon nanoindentation and nanoscratch are investigated, revealing chemical plasticity at the sub-Angstrom level.
Article
Materials Science, Ceramics
Min Ji, Jinyang Xu, Linfeng Li, Dedong Yu, Ming Chen, Mohamed El Mansori
Summary: The study found that 1100 degrees C is the transition threshold for the ceramic microstructure and mechanical properties, as well as for the transition in material removal mechanism from plastic regime to ductile-brittle characteristics.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Multidisciplinary
Liangxiao Wei, Xuyang Liu, Shoutao Zheng, Ning Hu, Min Chen, Xuewei Lv
Summary: The micromechanical and tribological properties of titanium matrix composites reinforced with graphene oxide were studied using nanoindentation and nanoscratch methods. The results showed that increasing GO content and sintering temperature improved the nanohardness and elastic modulus of the composite, leading to enhanced elastic recovery and reduced friction coefficient at higher temperatures.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Engineering, Biomedical
Lokeswar Patnaik, Saikat Ranjan Maity, Sunil Kumar
Summary: Ag-doped Cr/DLC coatings were successfully deposited on medical grade stainless steel, demonstrating elastic nature and 33% ductility. The coatings showed improved adhesion and lubrication during sliding tests, but experienced mild wear and wear scar gullies due to graphitization of carbon. Additionally, there were significant differences in hardness, elastic work, and plastic work between unworn and worn surfaces, but no significant difference in the H/E attribute. Raman spectra indicated no significant loss in structural integrity of the composite coating between worn and unworn surfaces.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2021)
Article
Polymer Science
Zina Vuluga, Catalina-Gabriela Sanporean, Denis Mihaela Panaitescu, George Mihail Teodorescu, Mihai Cosmin Corobea, Cristian Andi Nicolae, Augusta Raluca Gabor, Valentin Raditoiu
Summary: The study investigated the effect of processing conditions on masterbatches consisting of SEBS and halloysite nanotubes, showing that better dispersion and properties were achieved at lower temperature profiles and higher screw speeds. The masterbatches significantly enhanced the properties of PP/GF composites, with the best performing masterbatch leading to further improvements in mechanical properties.
Article
Chemistry, Multidisciplinary
Todor Batakliev, Evgeni Ivanov, Verislav Angelov, Giovanni Spinelli, Rumiana Kotsilkova
Summary: The nanomechanical properties of composite specimens based on polylactic acid (PLA) were investigated in this study, which has significant implications for the preparation and characterization of hybrid nanocomposites. Graphene nanoplatelets (GNPs) and multiwall carbon nanotubes (MWCNTs) were used as reinforcing nanoparticles, and a comprehensive analysis including nanoindentation, nanodynamic testing, and nanoscratch experiments was conducted to fully understand the nanoscale surface homogeneity and stress relaxation behavior of the nanocomposite specimens. The research approach contributed to the detection of new nanomechanical features as a function of the type of carbon nanofiller.
Article
Materials Science, Multidisciplinary
Charles Miller, Min Zou
Summary: This study investigates the nanoscale deformation behavior and failure mechanisms of PDA/PTFE coatings under various scratch loads using a nanoindenter. The study reveals that PDA/PTFE coating failure is strongly correlated with the removal of PDA particles in the underlayer.
Article
Biophysics
Onur Parlak, Atul Tiwari, Anthony P. F. Turner, Ashutosh Tiwari
BIOSENSORS & BIOELECTRONICS
(2013)
Article
Polymer Science
Suman Prabhakar, Jaya Bajpai, A. K. Bajpai, Atul Tiwari
Article
Polymer Science
Atul Tiwari, L. H. Hihara
POLYMER DEGRADATION AND STABILITY
(2009)
Article
Polymer Science
Atul Tiwari, L. H. Hihara
POLYMER DEGRADATION AND STABILITY
(2012)
Review
Chemistry, Applied
Atul Tiwari, L. H. Hihara
PROGRESS IN ORGANIC COATINGS
(2010)
Article
Chemistry, Applied
Atul Tiwari, L. H. Hihara
PROGRESS IN ORGANIC COATINGS
(2014)
Article
Materials Science, Coatings & Films
Atul Tiwari, Jun Zhu, Lloyd H. Hihara
SURFACE & COATINGS TECHNOLOGY
(2008)
Review
Chemistry, Applied
Atul Tiwari, Ryan Sugamoto, Lloyd H. Hihara
PROGRESS IN ORGANIC COATINGS
(2006)
Article
Polymer Science
A Tiwari, MK Gupta, KN Pandey, GN Mathur, SK Nema
POLYMER INTERNATIONAL
(2004)
Article
Thermodynamics
A Tiwari, AK Nema, CK Das, SK Nema
THERMOCHIMICA ACTA
(2004)
Article
Materials Science, Multidisciplinary
A Tiwari, KN Pandey, GN Mathur, SK Nema
MATERIALS RESEARCH INNOVATIONS
(2004)
Article
Materials Science, Multidisciplinary
A Tiwari, MK Gupta, SK Nema
JOURNAL OF MATERIALS SCIENCE
(2004)
Article
Materials Science, Multidisciplinary
A Tiwari, SK Nema
MATERIALS RESEARCH INNOVATIONS
(2003)
Article
Engineering, Chemical
MG Goswami, R Singh, A Tiwari, SK Nema
POLYMER ENGINEERING AND SCIENCE
(2005)
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)