Graphene/chitosan/Ag+- doped hydroxyapatite triple composite fiber coatings on new generation hybrid titanium composite by electrospinning

2021 ◽  
pp. 002199832110075
Author(s):  
Tuğba Mutuk ◽  
Mevlüt Gürbüz
Keyword(s):  
Hybrid Composites ◽  
Graphene Nanosheets ◽  
Pure Titanium ◽  
Composite Fiber ◽  
Mass Change ◽  
Coated Materials ◽  
Nano Fiber ◽  
Hybrid Nanofiber ◽  
New Generation ◽  
Fiber Coatings

In this work, The hybrid hydroxyapatite (HaP), chitosan (CH) and graphene nanosheets (GNS) mixtures were applied by electrospinning on the surface of GNS and Si3N4 (SN) binary powder reinforced hybrid titanium (Ti) metal composites surface to improve composite biosurface functionallity. The surfaces of coated materials were characterized and antibacterial tests were carried on for their suitability in the industry by performing artificial body fluid tests. The hybrid nano fiber coatings formed a homogeneous structure on the composite. According to bioactivity tests and microstructure analysis, it was seen that HaP, which has the best results in the change of pH (pH= 11.80) values. The lowest mass change (0.0005 g) was observed on the 10th day of pure titanium. The highest mass change (0.0210 g) was obtained as on the HaP coated hybrid titanium composite. According to the antibacterial test result the hybrid nanofiber containing silver (Ag+) doped HaP on Ti composites showed the best antibacterial property aganist the E.coli. The fabricated electrospin coated hybrid composites can be a potantial candidate for dental, orthopedic implant applications and tissue engineering.

A review on the intensification of metal matrix composites and its nonconventional machining

2018 ◽  
Vol 25 (2) ◽  
pp. 213-228 ◽  
Author(s):  
Ashish Kumar Srivastava ◽  
Amit Rai Dixit ◽  
Sandeep Tiwari
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Hybrid Composites ◽  
Advanced Materials ◽  
Matrix Composites ◽  
Suitable Material ◽  
Specific Strength ◽  
Wear And Corrosion ◽  
New Generation ◽  
Conventional Machining

AbstractMetal matrix composites (MMCs) are the new-generation advanced materials that have excellent mechanical properties, such as high specific strength, strong hardness, and strong resistance to wear and corrosion. All these qualities make MMCs suitable material in the manufacture of automobiles and aircraft. The machining of these materials is still difficult due to the abrasive nature of the reinforced particles and hardness of MMCs. The conventional machining of MMCs results in high tool wear and slow removal of materials, thereby increasing the overall machining cost. The nonconventional machining of these materials, on the contrary, ensures much better performance. This paper reviews various research works on the development of MMCs and the subsequent hybrid composites and evaluates their performances. Further, it discusses the influence of the process parameters of conventional and nonconventional machining on the performance of MMCs. At the end, it identifies the research gaps and future scopes for further investigations in this field.

scholarly journals New 2D graphene hybrid composites as an effective base element of optical nanodevices

2018 ◽  
Vol 9 ◽  
pp. 1321-1327 ◽  
Author(s):  
Olga E Glukhova ◽  
Igor S Nefedov ◽  
Alexander S Shalin ◽  
Мichael М Slepchenkov
Keyword(s):  
Absorption Coefficient ◽  
Hybrid Composites ◽  
Angle Of Incidence ◽  
Hybrid Nanocomposite ◽  
Base Element ◽  
Different Diameters ◽  
New Generation ◽  
Semiconductor Nanotubes ◽  
First Time ◽  
Topological Models

For the first time, we estimated perspectives for using a new 2D carbon nanotube (CNT)–graphene hybrid nanocomposite as a base element of a new generation o optical nanodevices. The 2D CNT–graphene hybrid nanocomposite was modelled by two graphene monolayers between which single-walled CNTs with different diameters were regularly arranged at different distances from each other. Spectra of the real and imaginary parts of the diagonal elements of the surface conductivity tensor for four topological models of the hybrid nanocomposite have been obtained. The absorption coefficient for p-polarized and s-polarized radiation was calculated for different topological models of the hybrid nanocomposite. It was found that the characteristic peaks with high intensity appear in the UV region at wavelengths from 150 to 350 nm (related to graphene) and in the optical range from 380 to 740 nm irrespective of the diameter of the tubes and the distance between them. For waves corresponding to the most intense peaks, the absorption coefficient as a function of the angle of incidence was calculated. It was shown that the optical properties of the hybrid nanocomposite were approximately equal for both metallic and semiconductor nanotubes.

Wood-Based Composites

2014 ◽  
pp. 1-45 ◽  
Author(s):  
Marius C. Barbu ◽  
Roman Reh ◽  
Mark Irle
Keyword(s):  
High Performance ◽  
Hybrid Composites ◽  
Plastic Foams ◽  
Laminated Veneer Lumber ◽  
Wood Floor ◽  
Element Size ◽  
Higher Dimensional ◽  
Panel Products ◽  
Resin Binder ◽  
New Generation

Wood composites are made from various wood or ligno-cellulosic non-wood materials (shape and origin) that are bonded together using either natural bonding or synthetic resin (e.g. thermoplastic or duroplastic polymers), or organic- (e.g. plastics)/inorganic-binder (e.g. cement). This product mix ranges from panel products (e.g., plywood, particleboard, strandboard, or fiberboard) to engineered timber substitutes (e.g., laminated veneer lumber or structural composite lumber). These composites are used for a number of structural and nonstructural applications in product lines ranging from interior to exterior applications (e.g. furniture and architectural trim in buildings). Wood composite materials can be engineered to meet a range of specific properties. When wood materials and processing variables are properly selected, the result can provide high performance and reliable service. Laminated composites consist of wood veneers bonded with a resin-binder and fabricated with either parallel- (e.g. Laminated Veneer Lumber with higher performance properties parallel to grain) or cross-banded veneers (e.g. plywood, homogenous and with higher dimensional stability). Particle-, strand-, or fiberboard composites are normally classified by density (high, medium, low) and element size. Each is made with a dry woody element, except for fiberboard, which can be made by either dry or wet processes. Hybrid composites based on wood wool, particles, and floor mixed with cement or gypsum are used in construction proving high weathering and fire resistance in construction. The mixture with plastics (PP or PE) and wood floor open a new generation of injected or molded Wood Plastic Composites (WPC), which are able to substitute plastics for some utilizations. In addition, sandwich panels with light core made from plastic foams or honeycomb papers are used in the furniture industry.

Mechanical and Tribological Properties of A7050 Hybrid Composite Reinforced with Nano Al2O3/Micro ZrO2 Particles by Stir Casting Method

2019 ◽  
Vol 969 ◽  
pp. 576-581
Author(s):  
K. Sekar ◽  
Rahul Singh
Keyword(s):  
Hybrid Composites ◽  
Base Alloy ◽  
Charpy Impact ◽  
Stir Casting ◽  
Ceramic Particle ◽  
Wear Loss ◽  
Casting Method ◽  
Mechanical And Tribological Properties ◽  
New Generation ◽  
Charpy Impact Strength

The composite plays an important role in the new generation of engineering material with better tribological and mechanical properties. In this paper, the hybrid composites of A7050/Al2O3/ZrO2 with different wt. % of reinforcement materials (0.5, 1, 1.5wt. % ZrO2, and 1wt. % Al2O3 constant for all composites) were fabricated by stir casting method. From the results, it was observed that the good texture in microstructure without defect with an addition of constant 1wt% Al2O3 and varying 0.5, 1and 1.5 wt% ZrO2. The Hardness of hybrid composites is increased by 27% with addition of 1wt % of Al2O3 and 1.5 wt% ZrO2 compare to base alloy. Charpy impact strength decreased with the addition of Al2O3 and ZrO2 ceramic particle in all the composites. From the dry wear studies, the composite with 1wt% Al2O3 and 1wt% ZrO2 was observed with minimum wear loss and low coefficient of friction.

Mode II Interlaminar Fracture Toughness of CNF-CFRP Hybrid Composite

2006 ◽  
Author(s):  
Masahiro Arai ◽  
Koh-Ichi Sugimoto ◽  
Morinobu Endo
Keyword(s):  
Fracture Toughness ◽  
Carbon Fiber ◽  
Hybrid Composites ◽  
Beam Theory ◽  
Mode Ii ◽  
Interlaminar Fracture Toughness ◽  
Interlaminar Fracture ◽  
Cfrp Laminates ◽  
Nano Fiber ◽  
Hybrid Laminates

Interlaminar fracture toughness for mode II deformation were investigated for carbon fiber (CF)/epoxy laminates toughened by carbon-nano-fiber/epoxy interlayer. Vapor grown carbon fiber (VGCF) and vapor grown carbon ‘nano’ fiber (VGNF) were chosen as the stiffeners for the interlayer. In order to illustrate the effect of the interlayer on the model II fracture toughness of the laminates, several types of CFRP/CNF hybrid laminates were fabricated, which are composed of unidirectional prepregs and carbon nano fiber varying the thickness of the interlayer. Mode II interlaminar fracture toughnesses of the hybrid composites were evaluated by end notched flexure (ENF) test using short-type beam specimens. The fracture toughnesses were calculated by traditional beam theory using the energy release rate of the crack. From the experimental results, it is confirmed that the mode II interlaminar fracture toughnesses for hybrid laminates are from 2.0 to 3.0 times higher than that of original CFRP laminates, and the optimal thickness (area density) of the CNF interlayer exists. The difference in the effect of the interlayer fracture properties under mode II deformation was discussed on the bases of fractographic observations derived from scanning electric microscope.

scholarly journals Comparative Tribological Study of NiTi Diffusion Coated Titanium with Pure Titanium

2021 ◽  
Author(s):  
G. Khosravi ◽  
M. Heydarzadeh Sohi ◽  
HM. Ghasemi ◽  
N. Jalalian Karazmoudeh
Keyword(s):  
Electron Microscope ◽  
Room Temperature ◽  
Intermetallic Layer ◽  
Pure Titanium ◽  
Wear Rates ◽  
Coated Materials ◽  
Pin On Disk ◽  
Titanium Diffusion ◽  
Wear Tests ◽  
Scanning Electron

Abstract Dry tribological behaviors of commercial pure (Cp) titanium and Cp titanium diffusion coated with equiatomic NiTi intermetallic layer were studied and compared at room temperature. Wear tests were performed by a pin on disk tribometer using 52100 steel pins, under various normal loads of 10, 20, and 40 N. worn surfaces were examined by scanning electron microscope, equipped with EDS analyzer. The wear rates of the coated materials were lower than those of the Cp titanium at all loads. This was mainly attributed to the higher hardness of the NiTi intermetallic layer compared to that of the untreated titanium. Furthermore, under an applying load of 10 N, a tribological layer was formed which could protect the surface from severe wear. The results also demonstrated a lower coefficient of friction in the treated specimens compared to those of the Cp materials.

scholarly journals Electrospinning preparation and near-infrared absorption properties of a silica/cesium tungsten bronze micro–nano fiber membrane

RSC Advances ◽  
2021 ◽  
Vol 11 (49) ◽  
pp. 31084-31089
Author(s):  
Yilong Song ◽  
Fang Zhao ◽  
Zhizun Li ◽  
Zhaogang Cheng ◽  
Hongjing Wan
Keyword(s):  
Infrared Absorption ◽  
Near Infrared ◽  
Heat Insulation ◽  
Tungsten Bronze ◽  
Composite Fiber ◽  
Fiber Membrane ◽  
Absorption Properties ◽  
Solar Heat ◽  
Electrostatic Spinning ◽  
Nano Fiber

A silica/cesium tungsten bronze composite fiber membrane with good near-infrared shielding performance is prepared by electrostatic spinning, and can be used for solar heat insulation.

Study on the Physical and Chemical Properties of Lueyang’s Basalt Fiber

2011 ◽  
Vol 239-242 ◽  
pp. 1376-1381 ◽  
Author(s):  
Jian Jun Li ◽  
Ying Meng ◽  
Yan Chun Liu
Keyword(s):  
Basalt Fiber ◽  
Chemical Properties ◽  
Melting Process ◽  
Composite Fiber ◽  
Chemical Components ◽  
Physical And Chemical Properties ◽  
Fiber Materials ◽  
New Generation ◽  
Physical And Chemical ◽  
And Chemical Properties

By deeply analyzing and studying the physical and chemical properties of Lueyang’s basalt fiber, its characteristics such as the chemical components, the crystallization’s upper limit temperature and lower limit temperature during the melting process, and the the viscosity and temperature change during melting process are verified to provide theoretical bases for the industrial production of a new type composite materials, and meanwhile to offer grounds for the development of a new generation of composite fiber materials.

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