scholarly journals Preparation and Mechanical Properties of Layered Cu/Gr Composite Film

Coatings ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 502
Author(s):  
Qifeng Li ◽  
Zhenbo Qin ◽  
Jingyun Chen ◽  
Da-Hai Xia ◽  
Yida Deng ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Composite Film ◽  
High Strength ◽  
Layered Composite ◽  
Dynamics Simulation ◽  
Matrix Composites ◽  
Electrodeposition Time ◽  
Cu Film ◽  
Layer Stacking ◽  
Pure Cu

Graphene (Gr) has proved its significant role as a reinforcement material in improving the strength of metal matrix composites due to its excellent mechanical properties. In this paper, Gr/Cu composite film with a layered structure was prepared by layering electrodeposition. The directional distribution of Gr in the Cu film was insured by this method, which gives play to its ultra-high-strength in a two-dimensional plane. In the meantime, the effect of electrodeposition time on the distribution structure of the Gr layer was studied. The structure analysis and mechanical properties test show that the strength of the layered Gr/Cu composite film is greatly improved compared to the pure Cu film. Furthermore, the strength of the composite film increases at the beginning and then decreases with the electrodeposition time of the Gr layer increasing, while the coverage and the degree for the layer stacking of Gr gradually increase in this process. In conclusion, the influence of different Gr distributions on the mechanical properties of the composite film has been studied by combining the experimental results with molecular dynamics simulation, which lays an effective foundation for further optimizing the structure of Gr in the layered composite film and improving the mechanical properties.

Mechanical Properties of Densified Untwisted Carbon Nanotube Yarn / Epoxy Composites

2015 ◽  
Author(s):  
Risa Yoshizaki ◽  
Kim Tae Sung ◽  
Atsushi Hosoi ◽  
Hiroyuki Kawada
Keyword(s):  
Mechanical Properties ◽  
Volume Fraction ◽  
Polymer Matrix Composites ◽  
High Strength ◽  
Matrix Composites ◽  
Specific Strength ◽  
The Matrix ◽  
Cnt Arrays ◽  
Strength And Stiffness ◽  
Long Fibers

Carbon nanotubes (CNTs) have very high specific strength and stiffness. The excellent properties make it possible to enhance the mechanical properties of polymer matrix composites. However, it is difficult to use CNTs as the reinforcement of long fibers because of the limitation of CNT growth. In recent years, a method to spin yarns from CNT forests has developed. We have succeeded in manufacturing the unidirectional composites reinforced with the densified untwisted CNT yarns. The untwisted CNT yarns have been manufactured by drawing CNTs through a die from vertically aligned CNT arrays. In this study, the densified untwisted CNT yarns with a polymer treatment were fabricated. The tensile strength and the elastic modulus of the yarns were improved significantly by the treatment, and they were 1.9 GPa and 140 GPa, respectively. Moreover, the polymer treatment prevented the CNT yarns from swelling due to impregnation of the matrix resin. Finally, the high strength CNT yarn composites which have higher volume fraction than a conventional method were successfully fabricated.

Evaluation of Mechanical Properties and Comprehensive Modeling of CMC with Stiff and Weak Matrices

2006 ◽  
Vol 45 ◽  
pp. 1435-1443 ◽  
Author(s):  
Dietmar Koch ◽  
Kamen Tushtev ◽  
Jürgen Horvath ◽  
Ralf Knoche ◽  
Georg Grathwohl
Keyword(s):  
Mechanical Properties ◽  
Mechanical Response ◽  
Ceramic Matrix Composites ◽  
High Strength ◽  
Shear Mode ◽  
Matrix Composites ◽  
Matrix Interface ◽  
Strain Behavior ◽  
Fiber Matrix Interface ◽  
Fiber Matrix

The mechanical properties of ceramic matrix composites (CMC) depend on the individual properties of fibers and matrix, the fiber-matrix interface, the microstructure and the orientation of the fibers. The fiber-matrix interface of ceramics with stiff matrices (e.g. CVI-derived SiC/SiC) must be weak enough to allow crack deflection and debonding in order to achieve excellent strength and strain to failure (weak interface composites WIC). This micromechanical behavior has been intensively investigated during the last 20 years. With the development of CMC with weak matrices (weak matrix composites WMC) as e.g. oxide/oxide composites or polymer derived CMC the mechanical response can not be explained anymore by these models as other microstructural mechanisms occur. If the fibers are oriented in loading direction in a tensile test the WMC behave almost linear elastic up to failure and show a high strength. Under shear mode or if the fibers are oriented off axis a significant quasiplastic stress-strain behavior occurs with high strain to failure and low strength. This complex mechanical behavior of WMC will be explained using a finite element (FE) approach. The micromechanical as well as the FE models will be validated and attributed to the different manufacturing routes.

scholarly journals Experimental Evalutionof Tensile Strenght of Cryogenically Solidified Aluminium Based Metal Matrix Composites (MMC)

2021 ◽  
Vol 12 (2) ◽  
pp. 2053-2059
Author(s):  
Kuwarmausam, Et. al.
Keyword(s):  
Mechanical Properties ◽  
Boron Carbide ◽  
Metal Matrix ◽  
High Strength ◽  
Elastic Stiffness ◽  
Good Mechanical Property ◽  
Matrix Composites ◽  
Weight Percentage ◽  
Light Material ◽  
Paper Author

Present technology demanded high strength lightweight material which offers good mechanical property and light in weight. Metal matrix composite is one popular type of such material. In this research authors, aluminum is reinforced to increase its properties like hardness, strength, elastic stiffness to suits the needs to design. Aluminum of grade LM13, which is light material reinforced with boron carbide to improves mechanical properties like strength hardness and elastic properties. In this paper author experimentally evaluate the mechanical properties of Aluminium LM13. The weight percentage of boron carbide by varying with a range of 5%, 10%, 15%, and 20%. An improved property of MMC makes them useful in different areas like aerospace and automotive industries. The microstructure of developed material has been reported in this paper.

scholarly journals Fabrication, Tensile Properties, and Photodecomposition of Basalt Fiber-Reinforced Cellulose Acetate Matrix Composites

Polymers ◽  
2021 ◽  
Vol 13 (22) ◽  
pp. 3944
Author(s):  
Yuxi Shen ◽  
Alia Gallet-Pandellé ◽  
Hiroki Kurita ◽  
Fumio Narita
Keyword(s):  
Mechanical Properties ◽  
Surface Treatment ◽  
Cellulose Acetate ◽  
Surface Active Agent ◽  
Active Agent ◽  
Basalt Fiber ◽  
High Strength ◽  
Tensile Tests ◽  
Matrix Composites ◽  
Vertical Orientation

Cellulose acetate (CA) is widely used as an alternative to conventional plastics because of the minor environmental impact of its decomposition cycle. This study synthesized five-layer environmentally friendly composites from CA bioplastic and basalt fibers (BFs) to produce a high-strength marine-biodegradable polymer. Maleic anhydride-grafted polypropylene (PP-g-MAH) was mixed with CA as a surface-active agent (SAA) to understand the effect of surface treatment on the mechanical properties of the composite. Tensile tests and scanning electron microscopy were conducted to observe the fracture surfaces. The ultimate tensile strength (UTS) of the BF/CA composite increased by approximately a factor of 4 after adding 11 vol.% unidirectional BF. When the SAA was added, the UTS of the composite with 11 vol.% BF was multiplied by a factor of about 7, which indicates that the surface treatment has a significant positive effect on the mechanical properties. However, the improvement is not apparent when the added BFs are in a plain weave with a vertical orientation. A photodecomposition experiment was then conducted by adding TiO2. Observing the UTS changes of the CA and BF/CA composites, the effect of the photocatalyst on the decomposition of the materials was explored.

scholarly journals Aluminum Based Metal Matrix Composites Behavioral Studies with Different Reinforcements- A Review

2021 ◽  
Vol 9 (10) ◽  
pp. 1816-1822
Author(s):  
Paramjit Singh
Keyword(s):  
Mechanical Properties ◽  
Metal Matrix ◽  
Density Ratio ◽  
High Strength ◽  
Stir Casting ◽  
Matrix Composites ◽  
Wear Properties ◽  
Mechanical And Tribological Properties ◽  
Behavioral Studies ◽  
Transportation Applications

Abstract: Aluminum alloy’s widely employed in transportation applications like: aerospace, aviation, marine and automobile sector due to their good mechanical properties, wear properties, corrosion behavior and high strength to density ratio. The current review article mainly highlights the effects of various reinforcements on mechanical and tribological properties of aluminum based metal matrix composite materials and focuses on the types of different reinforcements. Review revealed that, there is significant improvement in mechanical properties of AMMC’s with different reinforcements as compared to traditional base alloys. The reinforcements may be SiC, TiO2 , Al2O3 , fly ash, B4C, fiber, Zircon are incorporated in the stir casting or other methods. Keywords: AMMC, Reinforcements, Mechanical properties, Stir casting etc.

Development of Ti-MMCs by the Use of Different Reinforcements via Conventional Hot-Pressing

2016 ◽  
Vol 704 ◽  
pp. 400-405 ◽  
Author(s):  
Cristina Arévalo ◽  
Michael Kitzmantel ◽  
Erich Neubauer ◽  
Isabel Montealegre-Meléndez
Keyword(s):  
Mechanical Properties ◽  
Hot Pressing ◽  
Metal Matrix ◽  
High Strength ◽  
Strengthening Effect ◽  
Light Weight ◽  
Matrix Composites ◽  
Amorphous Boron ◽  
Hardness Tests ◽  
History Of

Titanium and its alloys have evolved faster than any structural material in the history of metallurgy. The increasing employment of titanium in many different applications is mainly due to its light weight, high strength and structural efficiency. The titanium metal matrix composites (Ti-MMCs) have helped to achieve these objectives. The aim of this work is the development and study of Ti-MMCs manufactured via hot pressing at 900 °C reinforced by sub-micron and micron boron carbide (B4C), amorphous boron and sub-micron and micron titanium diboride (TiB2) particles in order to improve its mechanical properties. Full dense composites were obtained with this consolidation technique. The influence of the different reinforcements has been analyzed. Moreover, the strengthening effect of sub-micron reinforcements is compared to the effect of the material with the same chemical composition in a micro-scaled phase. Comparison has been established studying the microstructure (grain size and density) and mechanical properties through tensile and hardness tests.

Mechanical Properties of Al2O3 Reinforced Cast and Hot Extruded Al Based Metal Matrix Composites

2015 ◽  
Vol 813-814 ◽  
pp. 208-212
Author(s):  
S. Ghanaraja ◽  
K.L. Vinuth Kumar ◽  
K.S. Ravikumar ◽  
B.M. Madhusudan
Keyword(s):  
Mechanical Properties ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Base Alloy ◽  
High Strength ◽  
Matrix Composites ◽  
Specific Strength ◽  
Good Corrosion Resistance ◽  
High Specific Strength ◽  
Low Weight

The Synthesis of aluminium matrix composites is receiving considerable emphasis in meeting the requirements of various industries. Due to the desired properties such as low weight, high specific strength, good corrosion resistance and excellent wear resistance, they have received a great interest in the recent years. Metal-matrix composites (MMCs) based on aluminium and magnesium has emerged as an important class of materials and Al2O3can be considered as ideal reinforcements, due to their high strength, high aspect ratio and thermo-mechanical properties. The objective of this work is to reinforce Al 1100-Mg alloy with different wt% of Al2O3(0, 3, 6, 9 and 12) was added by melt stirring method and Extrusion is carried out (extrusion ratio of 12.25) for the same alloy and composites. Mechanical property like hardness and tensile properties have been investigated for cast and extruded of base alloy and composites.

Studies on Mechanical Properties of Kevlar Fiber Reinforced Iron (III) Oxide Nanoparticles Filled Up/Epoxy Nanocomposites

2013 ◽  
Vol 747 ◽  
pp. 409-412
Author(s):  
S. Julyes Jaisingh ◽  
V. Selvam ◽  
M. Suresh Chandra Kumar ◽  
K. Thyagarajan
Keyword(s):  
Mechanical Properties ◽  
Polymer Matrix Composites ◽  
High Strength ◽  
Fiber Reinforced Polymer ◽  
Oxide Nanoparticles ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Kevlar Fiber ◽  
Reinforced Polymer ◽  
The Matrix

Fiber reinforced polymer matrix composites have extensively been used in various fields such as aerospace industries, automobiles, marine, and defense industries because of their high strength/weight ratios. In this paper, effect of silane modified iron (III) oxide nanoparticles on the mechanical properties of Kevlar fiber reinforced epoxy composites has been investigated. Composites samples were prepared, each using eight layers of Kevlar fiber reinforced epoxy filled with silane modified iron (III) oxide nanoparticles. The fractured surfaces of fibre reinforced composites were characterized by SEM. Tensile and flexural strength was studied as per the ASTM standards. Based upon the results it is clear that the miscibility of the silane modified iron (III) oxide nanoparticles in the matrix system is of the prime importance with regard to performance.

Mechanical Properties of Cu-Based Amorphous Alloy Matrix Composites Consolidated by Spark Plasma Sintering

2008 ◽  
Author(s):  
Duk-Hyun Nam ◽  
Chang-Young Son ◽  
Chang Kyu Kim ◽  
Sunghak Lee
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Amorphous Alloy ◽  
Plastic Strain ◽  
Spark Plasma Sintering ◽  
Matrix Composites ◽  
Alloy Matrix ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Pure Cu

In this study, microstructure and mechanical properties of Cu-based amorphous alloy matrix composites consolidated by spark plasma sintering (SPS) equipment were investigated. Amorphous alloy powders were mixed with 10∼40 vol.% of pure Cu powders, and were consolidated at 460°C for 1/2 minute under 300 or 700 MPa. The consolidated composites contained Cu particles homogeneously distributed in the amorphous matrix, and showed a considerable plastic strain, whereas their compressive strength was lower than that of the monolithic amorphous alloys. The compressive strength and plastic strain of the composites consolidated under 700 MPa showed 10∼20% and two times increases, respectively, over those of the composites consolidated under 300 MPa. The increase in consolidation pressure could play a role in sufficiently bonding between prior amorphous powders, in preventing micropores, and in suppressing the crystallization, thereby leading to the successful consolidation of the high-quality composites. Microfracture mechanisms were investigated by directly observing microfracture processes using an in situ loading stage. Cu particles present in the composites acted as blocking sites of crack propagation, and provided the stable crack growth. These findings suggested that the composites consolidated by the SPS presented new possibilities of application to structural materials or parts requiring excellent mechanical properties and large sizes.

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