Article
Materials Science, Multidisciplinary
Naiyer Shokri, Mir Saman Safavi, Mohamadreza Etminanfar, Frank C. Walsh, Jafar Khalil-Allafi
Summary: NiTi shape memory alloy has broad applications in orthopedics and dentistry due to its superelasticity, shape memory effect, high corrosion performance, and biocompatibility. New horizons for biomedical applications of NiTi can be opened by improving its corrosion resistance and surface characteristics through appropriate pre-treatments. The type of pre-treatment influences the final properties of coated NiTi, with different treatments showing different advantages such as superior corrosion behavior, in-vitro bioactivity, or hydrophilicity. The deposition of a highly crystalline nano-HAp coating enhances the final characteristics of pre-treated NiTi, leading to superior corrosion resistance compared to mechanically polished NiTi.
MATERIALS CHEMISTRY AND PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Gualter Silva Pereira, Oscar Mauricio Prada Ramirez, Pedro Renato Tavares Avila, Julian Arnaldo Avila, Haroldo Cavalcanti Pinto, Marcos Hideki Miyazaki, Hercilio Gomes de Melo, Waldek Wladimir Bose Filho
Summary: This work evaluates the electrochemical behavior and morphological characterization of a system consisting of a cerium conversion layer, a hybrid sol-gel coating, and the two coatings applied sequentially (duplex) for corrosion protection of WE43 Mg alloy. Different characterization techniques showed that the previous application of the conversion coating improved the surface coverage by the hybrid coating. Fitting impedance diagrams with electrical equivalent circuits allowed proposing a physical model for the coating, demonstrating its interaction with the porous Mg oxide/hydroxide layer. Self-healing properties of the duplex coating were also revealed.
Article
Polymer Science
Emilia Merino, Alicia Duran, Silvia Cere, Yolanda Castro
Summary: This study investigates the corrosion protection of magnesium alloys through anodizing and sol-gel deposition of an epoxy-alkyl coating. The results show that the curing temperature affects the polycondensation of the organic-inorganic network. Deposition of the epoxy-alkyl coating on the optimized anodic layers improves corrosion resistance and provides longer protection lifespan.
Article
Nanoscience & Nanotechnology
Armaghan Naderi, Bin Zhang, Jorge A. Belgodere, Kaushik Sunder, Genevieve Palardy
Summary: Hydroxyapatite (HA)-coated metals show potential for bone replacement and regeneration. This study designed biocompatible composite implants using a metal mesh substrate and HA coating. Experiments showed different coating methods, substrate materials, and mesh characteristics affected implant performance, but had no impact on HA coating crystal structure or shape.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Jiao Li, Tianshu Li, Yanwei Zeng, Changcheng Chen, Honglei Guo, Bing Lei, Ping Zhang, Zhiyuan Feng, Guozhe Meng
Summary: In this study, a novel sol-gel coating via catechol/lysine poly-merization was prepared and investigated, providing corrosion protection for magnesium alloys for up to 18 days. The co-deposition process of CA/Lys was studied and the enhanced compactness of the coating was achieved by filling in the macropores or nanopores and the nano-SiO2 cross-linked network.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2023)
Article
Materials Science, Ceramics
Sherif Elbasuney, Ibrahim Naeem, Mohamed Mokhtar, Mohamed Sheashea, Mahmoud Zorainy, Gharieb S. El-Sayyad, Mohamed Gobara
Summary: A novel Cr-substituted hydroxyapatite (Cr-HA) nanoparticles were synthesized using continuous hydrothermal technique. The synthesized material was embedded into a silica sol-gel matrix and applied on an AA2024 substrate to evaluate its corrosion inhibition efficiency. The results showed the formation of Cr-HA nanorods with a uniform distribution of Ca and Cr ions within the crystal structure. The Cr-HA sol-gel coating exhibited prolonged pitting resistance and self-healing properties in a corrosive media.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Applied
Jinhe Dou, Jing Wang, Yupeng Lu, Chuanzhong Chen, Huijun Yu, Robin Lok-Wang Ma
Summary: The generation of MAO/CS composite coatings on Mg-1.75Zn-0.56Ca alloy surface significantly improves the corrosion resistance and biocompatibility of the alloy, with smooth and defect-free characteristics of the coatings.
PROGRESS IN ORGANIC COATINGS
(2021)
Article
Materials Science, Ceramics
E. Merino, M. El Tawil, I. Sobrados, A. Duran, Y. Castro
Summary: Mg alloys have potential as biodegradable implants, but are prone to hydrogen evolution and corrosion. A double-layer coating system has been proposed to enhance biocompatibility and reduce corrosion rate of Mg alloys.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
Article
Materials Science, Ceramics
Ahmet Cagri Kilinc, Serhan Koktas, Ali Aydin Goktas
Summary: Hydroxyapatite (HAp) coatings were synthesized using eggshell and triethyl phosphite as precursors via sol-gel method, with added Polyethylene glycol (PEG) and triethanolamine (TEA) to enhance morphological structure. After heat treatment, T-HAp coating exhibited the best porous structure, while P-HAp coating showed poorer morphology.
JOURNAL OF THE AUSTRALIAN CERAMIC SOCIETY
(2021)
Article
Metallurgy & Metallurgical Engineering
Jiao Li, Tianshu Li, Jodie A. Yuwono, Guozhe Meng, Zhiyuan Feng
Summary: The purpose of this study is to develop a sol-gel-based coating for long-lasting corrosion protection on AZ31 Mg alloy. Silane-based sol-gel coatings have been successfully used, but defects formed during solidification can cause coating failure. A modified sol-gel coating with levodopa showed significant corrosion protection performance, lasting over 14 days.
ANTI-CORROSION METHODS AND MATERIALS
(2023)
Article
Engineering, Mechanical
Manasa Hegde, Joseph Mohan, Muhammad Qasim Mushtaq Warraich, Yvonne Kavanagh, Brendan Duffy, Edmond F. Tobin
Summary: Cavitation erosion and erosion-corrosion are common failure modes of hydronautics components due to mechanical destruction and electrochemical corrosion. The aim of this study is to develop a coating system to replace chromate-conversion coatings on aluminium alloy by combining an anodised layer with superhydrophobic sol-gel coatings. The characteristics affecting the coating's corrosion and cavitation erosion resistance were evaluated, including adhesion, thickness, hardness, and elastic modulus. The electrochemical behavior of the coatings was assessed, and their performance was tested under salt spray and cavitation erosion conditions. SEM/EDX analysis was conducted to evaluate surface damage caused by erosion-corrosion and cavitation erosion. The results aimed to determine if the developed coatings were a better alternative for protecting metals.
Article
Chemistry, Physical
Yuelong Pan, Zhidong Zhang, Daoyuan Wang, Hao Guo, Qiwu Shi, Tiecheng Lu
Summary: In this work, a sol-gel method assisted by post-annealing process was developed to synthesize Ni3Al coating on a nickel alloy with excellent oxidation resistance. The coating thickness can be controlled by designing the deposition times, and the coating is compact without obvious defects. The oxidation-resistant property of the coating was demonstrated through a supercritical water oxidation experiment.
Article
Nanoscience & Nanotechnology
Zeinab Savaedi, Hamed Mirzadeh, Rouhollah Mehdinavaz Aghdam, Reza Mahmudi
Summary: Shear punch testing was used to evaluate the superplasticity of a hot rolled fine-grained Mg-3Zn-0.5RE-0.5Zr (ZEK300) alloy. The alloy exhibited regions I, II, and III of deformation behavior typical of superplastic materials, with a grain size of 4.5 μm. In region II, the strain rate sensitivity indices of the ZEK300 alloy were determined to be 0.51, 0.48, and 0.41 at temperatures of 350, 400, and 450 degrees C, respectively. The average activation energy of 87.6 kJ mol-1 suggests that grain boundary sliding (GBS) facilitated by grain boundary diffusion is the dominant deformation mechanism.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Chemistry, Physical
Yi Zhang, Xiaohui Feng, Qiuyan Huang, Yingju Li, Yuansheng Yang
Summary: The Mg-3Zn-0.2Ca alloy fabricated by directional solidification exhibited highly anisotropic mechanical and corrosion properties. The anisotropy in mechanical properties was attributed to the activation of different deformation mechanisms, while the anisotropic elastic modulus was due to the difference in atomic bonding strengths at different crystallographic planes. Additionally, the corrosion resistance of the alloy also showed anisotropy, with the specimen taken along LD direction showing superior resistance.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Tengfei Meng, Shu Cai, Lei Ling, You Zuo, Hao Tian, Huanlin Zhang, Hang Zhang, Guohua Xu
Summary: Recently, there is increasing interest in superhydrophobic magnesium-based implants due to their superior corrosion resistance and specific anti-bacterial adhesion properties. However, the superhydrophobic surface hinders cell adhesion and proliferation, limiting the application of these implants. In this study, a superhydrophobic composite coating composed of hydroxyapatite, bismuth sulfide, and lauric acid was prepared on AZ31B Mg alloys. The composite coating exhibited a water contact angle of 156 degrees, providing excellent corrosion resistance and antibacterial properties. Additionally, the surface of the coating could be transformed from superhydrophobic to hydrophilic upon near-infrared light irradiation, offering effective protection for the Mg alloy substrate. The coated Mg alloy demonstrated high antibacterial efficiency against Staphylococcus aureus and Escherichia coli, and good biocompatibility with favorable cell viability and early cell growth and adhesion.
CERAMICS INTERNATIONAL
(2023)
Article
Pharmacology & Pharmacy
R. Manoj Kumar, Kanike Rajesh, Swati Haldar, Pallavi Gupta, K. Murali, Partha Roy, Debrupa Lahiri
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
(2019)
Article
Materials Science, Multidisciplinary
V Shankernath, Lakshun K. Naidu, Ghanashyam M. Krishna, K. A. Padmanabhan
MATERIALS RESEARCH EXPRESS
(2019)
Article
Materials Science, Multidisciplinary
Anshu Dubey, Satish Jaiswal, Swati Haldar, Partha Roy, Debrupa Lahiri
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2019)
Article
Materials Science, Multidisciplinary
Ankita Bisht, R. Manoj Kumar, Kinshuk Dasgupta, Debrupa Lahiri
MECHANICS OF MATERIALS
(2019)
Article
Engineering, Manufacturing
Ankita Bisht, Kinshuk Dasgupta, Debrupa Lahiri
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2019)
Article
Engineering, Multidisciplinary
Ankita Bisht, Vijayesh Kumar, Palash Chandra Maity, Indranil Lahiri, Debrupa Lahiri
COMPOSITES PART B-ENGINEERING
(2019)
Article
Materials Science, Biomaterials
Aniruddha Samanta, Soumik Podder, Murali Kumarasamy, Chandan Kumar Ghosh, Debrupa Lahiri, Partha Roy, Swarupananda Bhattacharjee, Jiten Ghosh, Anoop Kumar Mukhopadhyay
MATERIALS SCIENCE & ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
(2019)
Article
Materials Science, Biomaterials
R. Manoj Kumar, Swati Haldar, K. Rajesh, Souvik Ghosh, Debrupa Lahiri
MATERIALS SCIENCE AND ENGINEERING C-MATERIALS FOR BIOLOGICAL APPLICATIONS
(2019)
Article
Materials Science, Characterization & Testing
V Sangeetha, D. Gopinath, R. Prithivirajan, V. Girish Chandran, R. Manoj Kumar
Article
Pharmacology & Pharmacy
Kanike Rajesh, Souvik Ghosh, Aminul Islam, Manoj Kumar Rangaswamy, Swati Haldar, Partha Roy, Anup Kumar Keshri, Debrupa Lahiri
Summary: By using a multilayer HA coating with a gradient increase in porosity, the drug loading capacity was improved while maintaining the integrity of the coating. The fracture toughness of the coating was also enhanced, leading to improved tribological behavior, bioactivity, and osseointegration.
JOURNAL OF DRUG DELIVERY SCIENCE AND TECHNOLOGY
(2022)
Article
Nanoscience & Nanotechnology
Swati Haldar, Souvik Ghosh, Viney Kumar, Partha Roy, Debrupa Lahiri
ACS APPLIED BIO MATERIALS
(2019)
Article
Nanoscience & Nanotechnology
Kanike Rajesh, Manoj Kumar Rangaswamy, Cheng Zhang, Swati Haldar, Murali Kumarasamy, Arvind Agarwal, Partha Roy, Debrupa Lahiri
ACS APPLIED BIO MATERIALS
(2019)
Proceedings Paper
Materials Science, Multidisciplinary
V. Shankernath, K. Lakshun Naidu, M. Ghanashyam Krishna, K. A. Padmanabhan
PROF. DINESH VARSHNEY MEMORIAL NATIONAL CONFERENCE ON PHYSICS AND CHEMISTRY OF MATERIALS (NCPCM 2018)
(2019)