Article
Materials Science, Coatings & Films
Daihua He, Xuexian Zhang, Ping Liu, Xinkuan Liu, Xiaohong Chen, Fengcang Ma, Wei Li, Ke Zhang, Honglei Zhou
Summary: The hydrothermal treatment improved the properties of electrochemically prepared hydroxyapatite coatings on titanium alloy, healing cracks and increasing density. At 180 degrees C, the coating achieved maximum crystallinity and a bonding strength of about 23 MPa. The coatings obtained through electrochemical method and hydrothermal treatment showed good bioactivity.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Physical
Narayanan Ramaswamy, Venkatachalam Gopalan, Tae Yub Kwon
Summary: Nano-crystalline hydroxyapatite (HA) coatings were electrochemically deposited on Ti6Al4V substrates, and cathodic HA coatings were obtained by stirring the electrolyte using ultrasonic vibration. The coating obtained at a current density of 50 mA/cm(2) showed good corrosion resistance.
Article
Materials Science, Coatings & Films
Radka Gorejova, Renata Orinakova, Zuzana Orsagova Kralova, Tibor Sopcak, Ivana Sisolakova, Marek Schnitzer, Miroslav Kohan, Radovan Hudak
Summary: Successful acceptance of biomaterials relies on the interaction between their surface and the biological components of the host environment. Surface treatment, such as electrochemical deposition of ceramic coatings, can enhance the integration of orthopedic scaffolds. This study focuses on depositing HAp coatings on additively manufactured titanium specimens with a porous structure.
SURFACE & COATINGS TECHNOLOGY
(2023)
Article
Materials Science, Multidisciplinary
Hayriye Ertek Emre, Sennur Arslan
Summary: The study found that increasing the laser welding speed and reducing the heat input positively affected the bioactivity and biocorrosion features of Ti6Al4V laser welded joints, exhibiting better biocorrosion behavior with higher welding speeds and lower heat inputs.
METALS AND MATERIALS INTERNATIONAL
(2022)
Article
Materials Science, Coatings & Films
A. A. Burkov, S. Nikolenko, P. G. Chigrin, M. A. Kulik, V. O. Krutikova, A. A. Karpenko
Summary: Hydrothermal deposition of MoS2 on TiAl coatings reduces friction coefficient to 0.29 and wear rate by 5.4 times, while Cu-plating and etching on TiAl coatings can reduce them to 0.17, with a 61 times longer lubricant working lifetime.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Physical
Piotr Prochor, Zaneta Anna Mierzejewska
Summary: Scientists have identified two main paths for orthopedic implant fabrication, either searching for new materials with properties closest to natural bone or creating individually adapted geometry with Rapid Prototyping methods. PEEK GRF30 and Ti6Al4V SLM are materials of interest, but further research is needed to fully understand their bioactivity. The study found that both materials exhibited bioactivity comparable to Ti6Al4V, showing promising potential for orthopedic implants.
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
Materials Science, Coatings & Films
Gozde Celebi Efe, Elif Yenilmez, Ibrahim Altinsoy, Serbulent Turk, Cuma Bindal
Summary: The present study successfully coated a UHMWPE-HAp composite film on the surface of Ti6Al4V alloy, achieving surface modification of the material. Various analyses were conducted on the composite coating, demonstrating strong adhesion, good wear resistance, and potential application in artificial hip joint replacements.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Materials Science, Multidisciplinary
Pham Trung Kien, Tran Ngo Quan, Le Huynh Tuyet Anh
Summary: The study focuses on fabricating hydroxyapatite-coated titanium through three-step reactions and investigates the effect of different phosphate solutions and hydrothermal treatment time on the characteristics of the coating using various analytical methods. The resulting HA-coated titanium samples show promising multifunctional properties with fiber HA covering the substrate with diameters ranging from 0.1 to 0.3 μm after immersion in Na2HPO4 2 M at 180 degrees C for 48 hours.
Article
Chemistry, Physical
Ahmad Saadati, Behnam Nourmohammadi Khiarak, Ayda Asaadi Zahraei, Aida Nourbakhsh, Hurieh Mohammadzadeh
Summary: In this study, magnesium alloys were coated with hydroxyapatite/chitosan using electrophoretic deposition method with different graphene oxide content. It was found that adding 1% graphene oxide and applying 150V potential significantly improved the corrosion resistance of the magnesium alloys. The microstructure of the coatings showed a significant relationship with their corrosion resistance, potentially due to the formation of well dispersed, low porosity, and relatively dense composite coatings.
SURFACES AND INTERFACES
(2021)
Article
Biochemistry & Molecular Biology
Maria Nikolova, Maria Ormanova, Veselina Nikolova, Margarita D. Apostolova
Summary: Vacuum cathodic arc TiN coatings with overlaying TiO2 film were deposited on Ti6Al4V alloy surfaces polished and surface roughened by electron beam modification (EBM). EBM transformed the alloy structure and the coatings exhibited similar surface chemistry but different topographies. Despite lower nanohardness, the hybrid surface treatment improved adhesive loads, coefficient of friction, and wear-resistance. The coatings also showed good corrosion protection and enhanced cell attachment, viability, and bone mineralization activity when cultured with human osteoblast-like cells. The results suggest a synergistic effect between the sub-micron structure and composition of the coatings and the microarchitecture obtained by EBM.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
(2021)
Article
Chemistry, Physical
YaChao Wang, Kang Yu, JiangPing Zhao, A. Xin
Summary: Hydrothermally pretreated gibbsite can enhance flame resistance and optimize intumescent flame-retardant coatings. The doped gibbsite/boehmite improves flame retardancy due to enhanced crosslinking and formation of compact charring.
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2022)
Article
Materials Science, Coatings & Films
Gozde Celebi Efe, Elif Yenilmez
Summary: In this study, UHMWPE/Hap composite film coatings were produced on Ti6Al4V alloy using dip coating method. The composite coatings exhibited excellent wear resistance and biocompatibility, and showed promise for use in hip joint prostheses.
SURFACE ENGINEERING
(2022)
Article
Geochemistry & Geophysics
G. U. Ryu, Hammad R. Khalid, Namkon Lee, Zhen Wang, H. K. Lee
Summary: The study investigated the effect of NaOH concentration on the assemblage, crystallinity, and dimension of crystalline phases in hydroxyapatite-zeolite composites made with blast furnace slag. The composite samples using a 3 M NaOH solution showed the formations of Na-P1 and Faujasite (FAU) zeolites along with hydroxyapatite, which led to the highest adsorption capacity for cesium (44.90 mg/g).
Article
Materials Science, Coatings & Films
Sandeep Singh, Gurpreet Singh, Niraj Bala
Summary: The study fabricated a composite coating of CS-HA-BG-Fe3O4 with bioactivity, high corrosion resistance, and excellent cell proliferation, suitable for biomedical applications.
SURFACE & COATINGS TECHNOLOGY
(2021)
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)