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
Metallurgy & Metallurgical Engineering
Sudip Banerjee, Prasanta Sahoo, Suswagata Poria, Goutam Sutradhar
Summary: The addition of 1 wt% nano graphite in Mg-WC nanocomposites enhances both nanohardness and elastic modulus, but further addition has detrimental effects. Corrosion tests show that incorporating 1 wt% graphite nanoparticles improves corrosion resistance, but additional additions result in decreased resistance. Characterization of corroded surfaces reveals that the Mg-2WC-1Gr nanocomposite has fewer cracks and the lowest corrosion rate among all hybrid nanocomposites.
INTERNATIONAL JOURNAL OF METALCASTING
(2021)
Article
Engineering, Mechanical
G. J. A. M. Eumelen, A. S. J. Suiker, E. Bosco, N. A. Fleck
Summary: An analytical model is developed to deduce the elastic and plastic properties of an embedded hemispherical inclusion from its indentation response on a semi-infinite solid. The model differs from existing approaches by using analytical expressions for elastic and elastoplastic indentation responses and replacing the modulus with an effective modulus for the inclusion. The accuracy of the model is verified by comparing it with detailed finite element simulations for different inclusion and substrate combinations.
INTERNATIONAL JOURNAL OF MECHANICAL SCIENCES
(2022)
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, 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
Energy & Fuels
Chenliang Hou, Bo Jiang, Ming Li, Yu Song, Guoxi Cheng
Summary: The internal mechanism of how maceral and temperature control the mechanical properties of in situ coal has not been established so far. This study aims to discover the control mechanism of macerals and temperature on the mechanical properties of in situ coal. By linking the macroscopic and microscopic mechanical properties, it was found that the hardness and elastic modulus of macerals adhere to a specific order, and varying temperatures do not transform this order. The content increase of liptinite, vitrinite, and inertinite affects the hardness and elastic modulus of the whole coal differently. Temperature alters the mechanical properties of in situ coal through macerals as an intermediary, and there is a watershed in the effect of temperature on coal mechanical properties.
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
Acoustics
Yangjun Wang, Ziyuan Li, Limei Tian, Zhen Shang
Summary: Research shows that the elastic modulus of a boundary can have an impact on cavitation erosion. By using single-layer samples with different chemical composition and moduli, as well as double-layer samples with different elastic moduli but the same surface layer material, the direct relationship between the elastic modulus of the boundary and cavitation erosion was studied. The results indicate that the coating's chemical composition and mechanical properties together affect the cavitation morphology, and the dominant factors vary with erosion stage. The study also found a positive correlation between the elastic modulus of the coating and the degree of cavitation, providing theoretical and technical guidance for the application of anti-cavitation coatings in engineering.
ULTRASONICS SONOCHEMISTRY
(2023)
Article
Materials Science, Coatings & Films
Reza Ahmadi, Abdollah Afshar
Summary: The study aimed to improve the biocompatibility and corrosion resistance of 316L SS metal implants by creating HAp/TiO2/Al2O3 nanocomposite coatings. Results showed that these coatings have good biocompatibility, adhesion strength, and corrosion resistance.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Engineering, Biomedical
Dichu Xu, Maria Luisa Hernandez Miranda, Nicholas D. Evans, Bram G. Sengers, Martin Browne, Richard B. Cook
Summary: This study investigated the mechanical properties of thin PAAm hydrogel layers adherent to stiff substrate supports using depth profiling nanoindentation and a poroelastic model for spherical indentation. The results showed that the apparent stiffness and hydraulic conductivity of the thin hydrogel layers were influenced by the constraint of the impermeable substrate. The study also established the relationship between geometrical confinement and the mechanical properties of the thin hydrogel layers.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Yunfei Yu, Mo Cheng, Zicheng Tao, Wuxiao Han, Guoshuai Du, Yanfeng Guo, Jianping Shi, Yabin Chen
Summary: The study finds that the elastic modulus of 2D magnetic material FeTe can be modulated through phase engineering, and the elastic modulus is dependent on the thickness of the material. These findings are of significant importance for understanding and applying 2D magnetic materials in nanodevices.
Article
Forestry
Joseph E. Jakes, Donald S. Stone
Summary: In order to accurately measure mechanical properties of materials like wood cell walls, traditional nanoindentation methods need to be improved to account for the unique characteristics of these polymeric structures.
Article
Construction & Building Technology
Amedeo Gregori, Chiara Castoro
Summary: This study investigated the mechanical properties of concrete with waste tyre rubber replacing natural aggregates. The results showed that the addition of rubber particles significantly affected the mechanical properties of the concrete.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
Mohammad Ridduhan L. Natino, Yizhou Yang, Hikaru Nakamura, Taito Miura
Summary: This research investigated the effect of anti-corrosive coatings on the bond behavior of corroded rebar to concrete. Cementitious and epoxy coatings had different impacts on the geometrical properties and surface roughness of the rebar, with cementitious coatings providing better bond performance compared to epoxy coatings.
CONSTRUCTION AND BUILDING MATERIALS
(2021)
Article
Construction & Building Technology
K. Snehal, B. B. Das, Salim Barbhuiya
Summary: The stability of cementitious mortar incorporated with phase change material (PCM) under aggressive exposure conditions was evaluated. The addition of PCM increased the rate of deterioration, but the introduction of nano-silica dosage counteracted this negative impact and sustained the thermal efficiency characteristics of the mix.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Review
Cell Biology
Mohammad Ikbal Choudhury, Morgan A. Benson, Sean X. Sun
Summary: Active fluid transport between cells plays an important role in tissue morphogenesis, driven by directional transport of ions and osmotic gradients. The physics of this process is described by the osmotic engine model, also underlying cell migration. Recent experiments have measured the trans-epithelial fluid flux and hydraulic pressure gradient in various cellular and tissue systems. Hydraulic forces generated by active fluid pumping are crucial for tissue morphogenesis and homeostasis. The analogy between cellular fluidic pumps and a connected network of water pumps in a city highlights the importance of optimal pump efficiency in a dynamic and adaptive transport network.
SEMINARS IN CELL & DEVELOPMENTAL BIOLOGY
(2022)
Article
Multidisciplinary Sciences
Mohammad Ikbal Choudhury, Yizeng Li, Panagiotis Mistriotis, Ana Carina N. Vasconcelos, Eryn E. Dixon, Jing Yang, Morgan Benson, Debonil Maity, Rebecca Walker, Leigha Martin, Fatima Koroma, Feng Qian, Konstantinos Konstantopoulos, Owen M. Woodward, Sean X. Sun
Summary: This study demonstrates that renal epithelial cells can generate pressure gradients and drive fluid transport using a microfluidic platform. The fluid flux is from apical to basal for normal cells, and reversed in polycystic kidney disease cells. These findings highlight the importance of mechanical forces and hydraulic pressure in kidney function and morphological changes.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Physical
Salim Barbhuiya, Edmund Pang
Summary: This study examines the strength and microstructure of geopolymer based on fly ash and a combination of metakaolin and fly ash, exploring ways to limit or eliminate the usage of Portland cement in concrete.
Article
Chemistry, Multidisciplinary
Rahel Schnellmann, Dimitris Ntekoumes, Mohammad Ikbal Choudhury, Sean Sun, Zhao Wei, Sharon Gerecht
Summary: Aging is a major risk factor for microvascular dysfunction, but the underlying mechanism is not fully understood. This study demonstrates that changes in the mechanical properties of tissue collagen may contribute to endothelial cell dysfunction. Using a hydrogel model, the researchers found that increasing matrix stiffness led to the disruption of vascular networks. Inhibiting cell contractility prevented this disruption, partially rescuing the age-related vascular phenotype.
Review
Construction & Building Technology
Salim Barbhuiya, Bibhuti Bhusan Das
Summary: Hemp concrete is a unique building material that can continue to absorb carbon after construction, storing more carbon over the building's lifespan. It can be harvested in a short period and has the advantage of being recyclable.
CONSTRUCTION AND BUILDING MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Alexandros Afthinos, Kaustav Bera, Junjie Chen, Altug Ozcelikkale, Alice Amitrano, Mohammad Ikbal Choudhury, Randy Huang, Pavlos Pachidis, Panagiotis Mistriotis, Yun Chen, Konstantinos Konstantopoulos
Summary: In this study, we developed polyacrylamide-based microchannels with physiological stiffness and prescribed dimensions for high-throughput analysis of cell migration. We found a biphasic dependence of cell speed on confinement and stiffness. By utilizing novel four-walled microchannels, we revealed the distinct contributions of apicolateral and basal microchannel wall stiffness to confined and unconfined migration. We also innovated three-dimensional traction force measurements around spatially confining cells at subcellular resolution by tracking nanobeads embedded within the channel walls.
Article
Biology
Jiaxiang Tao, Mohammad Ikbal Choudhury, Debonil Maity, Taeki Kim, Sean X. X. Sun, Chen-Ming Fan
Summary: Physical compression drives activated muscle stem cells back to a quiescent state, providing insights into the activity of these cells during injury-regeneration cycles.
COMMUNICATIONS BIOLOGY
(2023)
Article
Construction & Building Technology
K. Snehal, B. B. Das, Salim Barbhuiya
Summary: Confiscation of alkaline buffer in a blended cementitious system increases the risk of carbonation. It is crucial to understand the carbonation mechanism and kinetics of multi-blended cementitious systems in relation to microstructural properties. This study investigated the changes in the microstructure of binary, ternary, and quaternary blended cementitious mortar mixtures containing fly ash, ultra-fine fly ash, and nanosilica under accelerated carbonation. The results showed that the optimized multi-blended cementitious systems with nanosilica exhibited higher resistance to carbonation kinetics, while mixes without nanosilica experienced a reduction in bound water content and increased precipitation of calcium carbonate.
CEMENT & CONCRETE COMPOSITES
(2023)
Review
Construction & Building Technology
Shiv Sai Trivedi, K. Snehal, B. B. Das, Salim Barbhuiya
Summary: There is a significant increase in global construction industry which has resulted in a huge amount of construction and demolition (C & D) waste. C & D waste, being the largest type of waste, needs to be effectively treated and utilized for sustainable development. Many useful and valuable materials are present in C & D waste, which can be reused as construction materials. However, processing and treatment of C & D waste face challenges due to the variable properties of materials and its bulky nature.
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Review
Construction & Building Technology
Salim Barbhuiya, Bibhuti Bhusan Das
Summary: This paper presents a comprehensive review of the application of molecular dynamics simulation in concrete research. The study provides an overview of the principles, applications, and types of molecular dynamics simulation, focusing on its role in enhancing the understanding of concrete properties. It critically examines existing research studies, explores simulation techniques and future directions, and discusses the potential impact of this approach on the sustainability of the construction industry.
JOURNAL OF BUILDING ENGINEERING
(2023)
Article
Construction & Building Technology
Salim Barbhuiya, Bibhuti Bhusan Das
Summary: This review paper provides a comprehensive analysis of Life Cycle Assessment (LCA) methodologies applied to construction materials. It discusses the importance of LCA in the construction industry and provides an overview of LCA principles, phases, and key parameters specific to construction materials. The paper reviews LCA studies on various construction materials, explores recent advances in LCA for construction materials, and discusses challenges and future directions in LCA implementation for construction materials.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Review
Construction & Building Technology
Salim Barbhuiya, Bibhuti Bhusan Das
Summary: This review paper thoroughly assesses the diverse roles of water-soluble polymers in cementitious materials. It covers different types of polymers, their working mechanisms, and their influence on various properties of cementitious materials. The challenges and opportunities in implementing water-soluble polymers are also discussed, along with key findings and recommendations for practical applications and future research. Overall, this review provides invaluable insights for researchers and practitioners, highlighting the multifaceted functions of water-soluble polymers in cementitious materials.
CASE STUDIES IN CONSTRUCTION MATERIALS
(2023)
Article
Construction & Building Technology
Shiv Sai Trivedi, Debasis Sarangi, B. B. Das, Salim Barbhuiya
Summary: Due to the shortage of natural coarse aggregate, recycled aggregate (RA) made from crushed concrete debris has been widely used in the construction industry. This study investigates the effect of multi-stage processing, mechanical abrasion, and sodium silicate immersion on improving the quality of RA. Experimental results show that the two-stage treatment method can enhance the mechanical, microstructural, and durability performance of recycled aggregate concrete (RAC).
CONSTRUCTION AND BUILDING MATERIALS
(2023)
Article
Construction & Building Technology
Partha Sarathi Deb, Md. Nabi Newaz Khan, Prabir Kumar Sarker, Salim Barbhuiya
Summary: The study used the nanoindentation method to determine the elastic modulus, hardness, and volume fractions of different phases in ambient-cured fly ash (FA) geopolymers. It was found that the inclusion of 2% nanosilica (NS) increased the volume of reaction product and reduced the presence of a porous phase in the FA geopolymers. This improvement in properties was also observed in OPC or GGBFS blended geopolymer specimens.
JOURNAL OF SUSTAINABLE CEMENT-BASED MATERIALS
(2022)
