scholarly journals Reinforcement of Aluminium-Matrix Composites with Glass Fibre by Metallurgical Synthesis

Materials ◽  
2020 ◽  
Vol 13 (23) ◽  
pp. 5441
Author(s):  
Małgorzata Zasadzińska ◽  
Paweł Strzępek ◽  
Andrzej Mamala ◽  
Piotr Noga
Keyword(s):  
Reference Material ◽  
Glass Fibre ◽  
Volume Fraction ◽  
Physical And Mechanical Properties ◽  
Extrusion Process ◽  
Aluminium Matrix ◽  
Additional Material ◽  
Aluminium Powder ◽  
Method Of Production ◽  
Microstructure Density

Continuous pressure put on researchers all over the world these days to design materials of improved properties create opportunities to study new methods of production in conjunction with entirely new and innovative materials such as alloys or composites. The authors in the current research manufactured aluminium reinforced with glass fibre (GF) using metallurgical synthesis, which is an unconventional and not sufficiently studied method of production. The composites with 1, 2 and 5 wt.% of glass fibre were produced with additional material obtained using consolidation of aluminium powder in extrusion process as reference material with 5 wt.% of glass fibre. All the materials were subjected to series of tests in order to determine their microstructure, density, electrical properties, hardness and susceptibility to plastic working in the compression test. It was found that glass fibre during metallurgical synthesis of aluminium composite partially melted and thus did not reinforce the material as well as during extrusion, which has been observed not only in the scanning electron microscope (SEM) and energy-dispersive X-ray (EDX) analysis but also in the analysis of macroscopic physical and mechanical properties. Based on the analysed samples, it may be stated that electrical conductivity of the samples obtained via metallurgical synthesis is higher than might be estimated on the basis of the rule of mixtures and glass fibre content and concerning the sample with 5 wt.% of GF is higher (32.1 MS/m) than of the reference material obtained in extrusion process (30.6 MS/m). Similar situation has been observed in terms of hardness of the tested samples where a minor increase in hardness was noticeable as the amount of glass fibre increased in the composites obtained by metallurgical synthesis. It is believed to be related to the melting of glass fibre, which reduced the volume fraction of GF containing mainly silicon oxides and their diffusion into the aluminium matrix, thus causing solid solution strengthening.

scholarly journals Production of Aluminum AA6061 Hybrid Nanocomposite from Waste Metal Using Hot Extrusion Process: Strength Performance and Prediction by RSM and Random Forest

Materials ◽  
2021 ◽  
Vol 14 (20) ◽  
pp. 6102
Author(s):  
Muntadher Sabah Msebawi ◽  
Zulkiflle Leman ◽  
Shazarel Shamsudin ◽  
Suraya Mohd Tahir ◽  
Che Nor Aiza Jaafar ◽  
...  
Keyword(s):  
Response Surface Methodology ◽  
Random Forest ◽  
Response Surface ◽  
Volume Fraction ◽  
Model Performance ◽  
Physical And Mechanical Properties ◽  
Hot Extrusion ◽  
Extrusion Process ◽  
Strength Performance ◽  
Pareto Analysis

To date, various studies have analysed the effects of reinforced ceramic on the properties of AA6061 recycled aluminum alloy chips, such as the tensile strength and fractography. However, a comprehensive analysis of the properties of hybrid composite with the addition of nano-silica oxide and nano-copper oxide reinforcements is still very limited. Therefore, this study aimed to optimise the factors comprising the preheating temperature (PHT), preheating time (PHti), and volume fraction (VF) of reinforcements then determine their impacts on the physical and mechanical properties of the recycled solid-state extruded composite aluminum chips. A total of 45 specimens were fabricated through the hot extrusion technique. The response surface methodology (RSM) was employed to study the optimisation at a PHT range of 450–550 °C with PHti of 1–3 h and VF of 1–3 vol% for both reinforcements (SiO2 and CuO). Moreover, a random forest (RF) model was developed to optimize the model based on a metaheuristic method to improve the model performance. Based on the experimental results the RF model achieve better results than response surface methodology (RSM). The functional quadratic regression is curvature and the tested variable shows stable close data of the mean 0 and α2. Based on the Pareto analysis, the PHT and VF were key variables that significantly affected the UTS, microhardness, and density of the product. The maximum properties were achieved at an optimum PHT, PHti, and VF of 541 °C, 2.25 h, 1 vol% SiO2 and 2.13 vol% CuO, respectively. Furthermore, the morphological results of the tensile fractured surface revealed the homogenous distribution of nano-reinforced CuO and SiO2 particles in the specimens’ structure.

scholarly journals METHOD OF SAMPLE MANUFACTURING FROM MULTILAYER COMPOSITE MATERIALS FOR STUDYING THEIR MECHANICAL PROPERTIES

2018 ◽  
pp. 16-23
Author(s):  
Alsaid Mazen ◽  
Ali Salamekh
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Polymer Composite ◽  
Testing Machine ◽  
Physical And Mechanical Properties ◽  
Polymer Composite Materials ◽  
Technological Parameters ◽  
Cutting Out ◽  
Method Of Production ◽  
Economic Considerations

In the last decades there is increasing the need to apply polymer composite materials in different industries, particularly in shipbuilding. There are developing single structures made from polymer composite materials to be used on board ships. The article focuses on technology of manufacturing slabs from polymer composite materials to carry out mechanical testing in the laboratory special standard units. Mechanical properties of polymer composite materials depend on molding technologies. There has been described a technology of sample manufacturing from polymer composite materials reinforced with glass fiber mat with fiberglass plastics. The technique of testing the specified samples for tensile strength has been considered. The sizes and shapes of the samples as well as the technological parameters of the manufacturing process have been validated, depending on the standard requirements and the technological features of the testing machine. The physical and mechanical properties of the components that make up the composite materials are considered. The sequence of stacking layers for preparation of plates from composite materials is indicated. The dimensions of the plates for cutting out finished samples are determined, depending on the method of production. The way of laying plates from composite materials has been chosen on the base of economic considerations and conditions of accessibility. The obtained results of mechanical properties can be used in solving problems of application of polymer composite materials in shipbuilding, for example, in manufacturing superstructures of some dry cargo vessels.

Microstructure Analysis and Preparation of Graphene Reinforced Aluminum Matrix Composites

2019 ◽  
Vol 814 ◽  
pp. 102-106
Author(s):  
He Ping Liu ◽  
Feng Er Sun ◽  
Shao Lei Cheng ◽  
Lang Lang Liu ◽  
Yi Bo Gao
Keyword(s):  
Electron Microscopy ◽  
Aluminum Matrix ◽  
Aluminium Matrix ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Vacuum Sintering ◽  
Composite Powders ◽  
Aluminium Matrix Composites ◽  
Aluminium Powder ◽  
Powder Particles

Although many problems in aluminium matrix composites have been solved, there are still many difficulties and challenges that need to be solved. In this work, graphene reinforced aluminum matrix composites are prepared by hot isostatic pressing and vacuum sintering. The microstructures of composite powders and composites were studied by means of scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The effects of different ball milling parameters on the microstructures of composite powders were analyzed. The particle size of graphene coated aluminium composite powder increases with the increase of ball-to-material ratio. With the increase of milling time, graphene was gradually dispersed and coated on the aluminium powder particles, and the aluminium powder particles could be completely coated. with the increase of the speed, the large particles are extruded, sheared and the particles become smaller. The internal micro-deformation characteristics of graphene reinforced aluminium matrix composites were analyzed in detail.

scholarly journals Permeability and compaction behaviour of air-texturised glass fibre rovings: A characterisation study

2020 ◽  
Vol 54 (27) ◽  
pp. 4241-4252 ◽  
Author(s):  
Michael Sandberg ◽  
Ayyoub Kabachi ◽  
Maximilian Volk ◽  
Filip Bo Salling ◽  
Paolo Ermanni ◽  
...  
Keyword(s):  
Glass Fibre ◽  
Volume Fraction ◽  
Compaction Pressure ◽  
Single Step ◽  
Elastic Response ◽  
Fibre Direction ◽  
Degree Of Anisotropy ◽  
Compaction Behaviour

Air-texturisation is a process that adds bulkiness to bundles of fibres. In this study, the permeability and compaction behaviour of air-texturised glass fibre rovings are experimentally characterised and compared to conventional unidirectional rovings. Based on radial impregnation experiments and single-step compaction/decompaction tests, the following main findings are highlighted: Compared to conventional unidirectional-rovings, the normalised permeability of the air-texturised rovings was approximately three times higher along the fibre direction and 40 times higher transverse to the fibre direction. Accordingly, the degree of anisotropy was approximately one magnitude lower. At a compaction pressure of 1 and 5 bar, the air-texturised rovings were compacted to a volume fraction of [Formula: see text] and 0.43, respectively, which was approximately 30% lower than the volume fraction achieved for the conventional unidirectional-rovings. Finally, it was observed that the decompaction of air-texturised rovings exhibits a more distinct elastic response when unloaded.

Effect of Titanium Nitride on Properties of Hydroxyapatite-Based Composites for Biomedical Applications

2015 ◽  
Vol 804 ◽  
pp. 139-142
Author(s):  
Komsanti Chokethawai ◽  
Gobwut Rujijanagul ◽  
Tawee Tunkasiri
Keyword(s):  
Titanium Nitride ◽  
Biomedical Applications ◽  
Volume Fraction ◽  
Physical And Mechanical Properties ◽  
Thermal Processes ◽  
Bovine Bone ◽  
Artificial Bone ◽  
Maximum Hardness ◽  
X Ray ◽  
The Aesthetic

Hydroxyapatite (HA) is widely used in biomedical applications as an artificial bone due to its excellent biocompatibility. In this work, the high purity HA powders were synthesized from natural bovine bone by a sequence of thermal processes. Then, the HA-based composites containing titanium nitride (TiN) at various compositions were fabricated by a solid-state reaction mixed oxide method. The green compacts were subsequently pressed and then sintered at 1200-1250°C for 2 hours. Surface morphology, compositions and phases of the as-prepared HA-based composites were analyzed by means of scanning electron microscopy (SEM) utilizing energy dispersive X-ray spectroscopy (EDS) and X-ray diffractometry (XRD), respectively. The results showed that the physical and mechanical properties and also the aesthetic performance of HA-TiN composites were substantially varied through the changes in the microstructure and volume fraction of the reinforcing particulates. The maximum hardness value of 3.5 GPa was obtained for HA-2wt%TiN ceramic sintered at 1250°C.

scholarly journals Hybrid and Nonhybrid Laminate Composites of Sugar Palm and Glass Fibre-Reinforced Polypropylene: Effect of Alkali and Sodium Bicarbonate Treatments

2019 ◽  
Vol 2019 ◽  
pp. 1-12
Author(s):  
Isma’ila Mukhtar ◽  
Zulkiflle Leman ◽  
Edi Syams Zainudin ◽  
Mohamad Ridzwan Ishak
Keyword(s):  
Sodium Bicarbonate ◽  
Glass Fibre ◽  
Hybrid Composites ◽  
Alkali Treatment ◽  
Physical And Mechanical Properties ◽  
Alkaline Treatment ◽  
Morphological Examination ◽  
Compression Process ◽  
Laminate Composites ◽  
Glass Fibre Reinforced

In recent years, the hybrid composites of cellulosic and synthetic fibres are tailored to yield materials with reduced cost and weight. Prior to the fabrication of the hybrid composite, in most case, the cellulosic fibre needs surface modification for proper bonding. Therefore, this study investigates the effect of sodium bicarbonate treatment on the physical and mechanical properties of the hybrid and nonhybrid laminate composites of sugar palm and glass fibre-reinforced polypropylene. The findings will be compared with the conventional alkali treatment. The laminate composites were fabricated using the film stacking technique and hot compression process. Prior to the fabrication process, the sugar palm fibre in it which is naturally woven mat was treated with 4 wt% and 10 wt% alkali and sodium bicarbonate, respectively. All the laminate composites were investigated by tensile, flexural, and impact test, water absorption, and morphological examination. The tensile strength increased with both alkaline and sodium bicarbonate treatments for the hybrid and nonhybrid composites. The increase was more pronounced with the alkaline-treated SPF composite (L03) which displayed the highest value of 61.75 MPa, while that of the sodium bicarbonate-treated SPF composite (L04) recorded 58.76 MPa against 53.01 MPa for the untreated SPF composite (L02). The same trend was observed for the flexural strength. In overall, the alkaline treatment yielded better performance in comparison with sodium bicarbonate treatment.

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