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Title
Abstract
Introduction
Materials and Methods
Materials
Nanocomposite Characterisation Methods
Pla Ni/Y 2 O 3 Composite Characterisation Methods
Results and Discussion
Pla NI/Y2O3 Composite Characterisation Methods
Conclusions
References
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Engineering
Materials Science

Study of Ni/Y2O3/Polylactic Acid Composite

Profile image of Matej ZadravecMatej Zadravec

Materials

https://doi.org/10.3390/MA16145162
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Abstract

This study demonstrates the successful synthesis of Ni/Y2O3 nanocomposite particles through the application of ultrasound-assisted precipitation using the ultrasonic spray pyrolysis technique. They were collected in a water suspension with polyvinylpyrrolidone (PVP) as the stabiliser. The presence of the Y2O3 core and Ni shell was confirmed with transmission electron microscopy (TEM) and with electron diffraction. The TEM observations revealed the formation of round particles with an average diameter of 466 nm, while the lattice parameter on the Ni particle’s surface was measured to be 0.343 nm. The Ni/Y2O3 nanocomposite particle suspensions were lyophilized, to obtain a dried material that was suitable for embedding into a polylactic acid (PLA) matrix. The resulting PLA/Ni/Y2O3 composite material was extruded, and the injection was moulded successfully. Flexural testing of PLA/Ni/Y2O3 showed a slight average decrease (8.55%) in flexural strength and a small decrease from 3.7 to 3.3...

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Alok Chaudhari

ChemistrySelect, 2020

Metal matrix composites with yttria as reinforcement are mostly produced because of it's improved mechanical properties while thermal stability, electrochemical and magnetic properties of the yttria based composites are rarely considered. In the present study, the feasibility of incorporating yttria nanoparticles into nickel matrix from ethylene glycol bath by electro-codeposition method is demonstrated. The particle content of the coatings was strongly influenced by current density i. e. the rate of metal deposition. Particle content, surface morphology and microstructural changes of the deposits were investigated by scanning electron microscope (SEM) equipped with energy dispersed X-ray analyzer (EDAX). A dense, compact and smoother composite surface with lower particle content was obtained at higher current densities. Crystallographic structure, texture and lattice strain have been evaluated using X-ray diffraction (XRD). Incorporation of yttria particles inhibits the grain growth and causes grain refinement of the nickel matrix. Annealed nanocomposite deposits revealed thermal stability up to 700°C. The comparative electrochemical corrosion behavior of the electrodeposited coatings in 3.5 % NaCl solution and their deposition potential were evaluated. Magnetic studies showed nearly complete absence of hysteresis i. e. soft magnetic nature of the coatings.

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Preparation and Characterization of Nanocomposite Ni-Al<sub>2</sub>O<sub>3</sub> Thin Films by Ultrasonic-Electrodeposition Technology
Reihaneh Zolfaghari, Homayoun Moaddel

Applied Mechanics and Materials, 2011

The entire world's challenge is to find out the renewable energy sources due to rapid depletion of fossil fuels because of their high consumption. Solid oxide fuel cells (SOFCs) are believed to be the best alternative source, which converts chemical energy into electricity without combustion. Nanostructure study is required to develop highly ionic conductive electrolytes for SOFCs. In this work, the calcium doped ceria ͑Ce 0.8 Ca 0.2 O 1.9 ͒ coated with 20% molar ratio of two alkali carbonates (CDC-M: MCO 3 , where M ϭ Na and K) electrolyte was prepared by coprecipitation method. Ni based electrode was used to fabricate the cell by dry pressing technique. The crystal structure and surface morphology were characterized by an X-ray diffractometer, scanning electron microscopy (SEM), and high resolution transmission electron microscopy (TEM). The particle size was calculated in the range 10-20 nm by Scherer's formula and compared with SEM and TEM results. The ionic conductivity was measured by using ac electrochemical impedance spectroscopy method. The activation energy was also evaluated. The performance of the cell was measured 0.567 W / cm 2 at temperature 550°C with hydrogen as a fuel.

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Effect of Nano (Y2O3 ) on the Mechanical Properties of the (PS:NR:PMMA) Polymer Blend Composite
Waleed Bdaiwi

Diyala Journal for Pure Science, 2017

Study of the mechanical properties of polymer blend composite to the preparation of matrix Unsaturated Polyester resin (UPS) with natural rubber (NR) and polymethyl methacrylate (UPS:NR:PMMA) material and study influence Nano Yttrium Oxide (Y2O3) on the composite. The first group is the preparation of samples of the mixture of polyester matrix with natural rubber material in ratio certain, It was examined the mechanical properties: tensile, flexure at break, young modules, hardness and compression decreases with increases the natural Rubber ratio but Elongation test increases when increases Rubber ratio. The second group is the samples preparation of the mixture of polyester with PMMA material, test mechanical properties decreases with increases the PMMA ratio. Third group was prepared from a mixture of polymer blend composite, which consists of fixed ratios of polyester, natural rubber and PMMA. Addition of Nano material Y2O3 at ratio (0.25-1.5) wt% .result test mechanical properties increases with increases the Y2O3 ratio.

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Electrodeposition and characterization of Ni–Y2O3 composite
Włodzimierz Tylus

Applied Surface Science, 2011

Metal composite coatings with nano or micron size particles have many industrial applications. Electrodeposited nickel composite coatings are used for corrosion protection, wear resistance, high temperature oxidation and to improve micro-hardness 1. It is well known that the physical and mechanical properties of the Ni composite depend on the uniformity and the amount of particles incorporated in the metal 2. Although Ni can be deposited from aqueous media, it is difficult to incorporate hydrophilic particle due to the hydration layer at their interface 3,4. Such hydrophilic particles can however be codeposited from non-aqueous electrolytes 5 .

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