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 Effect of T6 Heat Treatment on Microstructure and Hardness of Nanosized Al2O3 Reinforced 7075 Aluminum Matrix Composites

Metals ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 44 ◽  
Author(s):  
Peng-Xiang Zhang ◽  
Hong Yan ◽  
Wei Liu ◽  
Xiu-Liang Zou ◽  
Bin-Bing Tang
Keyword(s):  
Electron Microscopy ◽  
Heat Treatment ◽  
Solution Treatment ◽  
Aluminum Matrix ◽  
Aging Treatment ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
X Ray ◽  
T6 Heat Treatment ◽  
The Matrix

In this study, 7075 aluminum matrix composites reinforced with 1.5 wt.% nanosized Al2O3 were fabricated by ultrasonic vibration. The effect of T6 heat treatment on both microstructure and hardness of nanosized Al2O3 reinforced 7075 (Al2O3np/7075) composites were studied via scanning electron microscopy, energy dispersive X-ray spectrometry, X-ray diffraction, transmission electron microscopy, and hardness tests. The Mg(Zn,Cu,Al)2 phases gradually dissolved into the matrix under solution treatment at 480 °C for 5 h. However, the morphology and size of Al7Cu2Fe phases remained unchanged due to their high melting points. Furthermore, the slenderness strips MgZn2 phases precipitated under aging treatment at 120 °C for 24 h. Compared to as-cast composites, the hardness of the sample under T6 heat treatment was increased ~52%. The strengthening mechanisms underlying the achieved hardness of composites are revealed.

scholarly journals Drilling of Ceramic Reinforced Aluminum Matrix Composite under Dry Condition

2020 ◽  
Vol 9 (4) ◽  
pp. 3029-3033
Keyword(s):  
Surface Roughness ◽  
Matrix Composite ◽  
Cutting Speed ◽  
Aluminum Matrix ◽  
Cutting Parameters ◽  
Aluminium Matrix ◽  
Matrix Composites ◽  
Aluminium Matrix Composite ◽  
Aluminium Matrix Composites ◽  
Silicon Carbide Particulate

In this study an experimental investigation of effects of cutting parameters on surface roughness during drilling of silicon carbide particulate reinforced aluminium matrix composite material under dry condition was carried out. Cutting speed , feed rate and % SiC in aluminium matrix composites were chosen as cutting parameters. The experimental design adopted for this investigation was the central composite design of response surface methodology. Thirty one readings were taken on VMC machine for dry condition and the surface roughness measured using Mitutoyo surface tester. Surface roughness values for dry condition were lower with 30% SiC reinforced aluminium matrix composites when compared to 10 % and 20 % SiC reinforced aluminium matrix composites . As cutting speed increased Ra & Rz value also increased .% SiC was found most significant factor while drilling aluminium matrix composites.

Vacuum brazing of high volume fraction SiC particles reinforced aluminum matrix composites

2015 ◽  
Vol 29 (06n07) ◽  
pp. 1540002 ◽  
Author(s):  
Dongfeng Cheng ◽  
Jitai Niu ◽  
Zeng Gao ◽  
Peng Wang
Keyword(s):  
Electron Microscopy ◽  
Volume Fraction ◽  
Aluminum Matrix ◽  
High Volume ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Alloy Matrix ◽  
Vacuum Brazing ◽  
Sic Particles ◽  
A356 Aluminum

This experiment chooses A356 aluminum matrix composites containing 55% SiC particle reinforcing phase as the parent metal and Al – Si – Cu – Zn – Ni alloy metal as the filler metal. The brazing process is carried out in vacuum brazing furnace at the temperature of 550°C and 560°C for 3 min, respectively. The interfacial microstructures and fracture surfaces are investigated by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy spectrum analysis (EDS). The result shows that adequacy of element diffusion are superior when brazing at 560°C, because of higher activity and liquidity. Dislocations and twins are observed at the interface between filler and composite due to the different expansion coefficient of the aluminum alloy matrix and SiC particles. The fracture analysis shows that the brittle fracture mainly located at interface of filler and composites.

scholarly journals Silicon Nitride as a Reinforcement for Aluminium Metal Matrix Composites to Enhance Microstructural, Mechanical and Tribological Behavior

2020 ◽  
Vol 9 (3) ◽  
pp. 3366-3374 ◽  
Keyword(s):  
Silicon Nitride ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Tribological Behavior ◽  
Hybrid Composites ◽  
Aluminium Matrix ◽  
Scientific Development ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Aluminium Matrix Composites

In recent years, aluminium and its hybrid composites receiving more attention due to its excellent property combinations like improved mechanical properties, better wear and high corrosion resistance, ease to process and probably reduced production cost etc.. Composite is made of two phases one is matrix and another one is reinforcement. The performance of composite highly depends on some key factors that decide overall performance and they are properties of constituent phases, reinforcement size, reinforcement distribution in the matrix and their interfacial interaction. Particle reinforced metal matrix composites (particulate metal matrix composites- PMMCs) are becoming more popular due to their low cost, easy to process and compatible to conventional processing techniques. Also they give isotropic properties. The most commonly used reinforcements are carbides, oxides and nitrides. A lot of research has taken place including carbide and oxide as a reinforcement particles for aluminum matrix composites (AMCs) and hybrid aluminium matrix composites (HAMCs) while there is a bit research lag in use of nitride as a reinforcement for development of AMCs and HAMCs. Recent competitive market demands the material having better combination of properties, cost effectiveness and eco-friendly nature. Present article focused on to study the microstructural features, physical properties, mechanical and tribological behavior of aluminium matrix composites when reinforced with silicon nitride particles (Si3N4). Potential area of applications has also been suggested on the basis of literature data. In this review a comprehensive study has done for current scientific development carried out in Al based Si3N4 composites as well as its future scope has also been discussed

Aluminum Matrix Composites Strengthened with CuZrAgAl Amorphous Atomized Powder Particles

2015 ◽  
Vol 24 (6) ◽  
pp. 2266-2273 ◽  
Author(s):  
Jan Dutkiewicz ◽  
Łukasz Rogal ◽  
Wojciech Wajda ◽  
Agata Kukuła-Kurzyniec ◽  
Christian Coddet ◽  
...  
Keyword(s):  
Aluminum Matrix ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Powder Particles

The Wear Performance at High Temperatures of ZrO2-Reinforced Aluminum Matrix Composites Produced by Mechanochemical Reaction Method

2020 ◽  
Vol 142 (10) ◽  
Author(s):  
Dogan Sımsek ◽  
Dursun Ozyurek
Keyword(s):  
Aluminum Matrix ◽  
Mechanochemical Reaction ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Composite Powders ◽  
Aluminum Composite ◽  
Wear Performance ◽  
Reaction Method ◽  
The Matrix ◽  
Pin On Disc

Abstract In this study, high-temperature wear performance of A356+Gr-ZrO2 aluminum matrix composites (AMCs) produced by the mechanochemical reaction method was investigated. After the aluminum composite powders were cold-pressed (750 MPa), the green compacts were sintered under 10−6 mbar vacuum for an hour at 550 °C. Sintered AMCs have been characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), hardness and density measurements. Wear tests were conducted in two different loads (10 N and 30 N), five different temperatures, and three different sliding distances in the standard pin-on-disc type wear tester. Result showed that ZrO2 added to the matrix tends to cluster in grain boundaries. AMCs hardness and densities increased with the increasing amount of reinforcement, and the highest hardness and density value was obtained with 12% ZrO2-added AMCs. Weight loss increased with increasing load and temperature and decreased with increasing amount of reinforcement in the matrix at all loads and temperatures.

Experimental Investigations on Vibration Properties of Aluminium Matrix Composites Reinforced with Iron Oxide Particles

2019 ◽  
Vol 895 ◽  
pp. 122-126
Author(s):  
S.P. Shivakumar ◽  
A.S. Sharan ◽  
K. Sadashivappa
Keyword(s):  
Iron Oxide ◽  
Dynamic Properties ◽  
Aluminum Matrix ◽  
Aluminium Matrix ◽  
Experimental Investigations ◽  
Damping Capacity ◽  
Matrix Composites ◽  
Damping Properties ◽  
Iron Oxide Particles ◽  
Aluminium Matrix Composites

Aluminium matrix composites offer improved damping properties than other metals and its alloy. Generally pure metals and its alloys may have fairly good mechanical properties but falls short in damping properties. Aluminium matrix composites are becoming important in aerospace automobile and marine applications due to its god damping properties. The present investigation is concerned with the damping capacity of iron oxide (Fe2O3) reinforced aluminium matrix composite. The composites were fabricated with 2%, 4% and 6%, by weight of iron oxide with varied particle of size 40 μm and 500 nm in equal proportions using stir casting process. From the results obtained the 500 nm size with 4 wt% of iron oxide showed improved dynamic properties. The iron oxides reinforced with aluminum matrix are found to be new substitutes for the existing materials with low damping properties.

scholarly journals Microstructure and mechanical properties of aluminum matrix composites with different volume fractions of surface-oxidized nanodiamonds

2020 ◽  
Vol 29 ◽  
pp. 2633366X2097749
Author(s):  
Wei Yan ◽  
Mingchen Ma ◽  
Heyi Kang ◽  
Qian Li ◽  
Hongqun Tang ◽  
...  
Keyword(s):  
Volume Fraction ◽  
Testing Machine ◽  
Aluminum Matrix ◽  
Surface Oxidation ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Vacuum Sintering ◽  
The Matrix ◽  
Al Matrix Composites ◽  
Al Matrix

Nanodiamonds (NDs) have the characteristics of both diamonds and nanomaterials. However, it is difficult to disperse NDs, and this is why there is less research regarding NDs in the field of aluminum matrix composites. In the present work, NDs were modified via surface oxidation, and ND/Al matrix composites were successfully prepared via mechanical ball milling and vacuum sintering. The effects of different volume fraction of NDs (1%, 3%, 5%, 7%) after surface oxidation on the ND/Al matrix composite were analyzed using a metallographic microscope, scanning electron microscope, infrared spectrometer, X-ray diffractometer, microhardness tester, and universal testing machine. The results show that the optimal temperature of surface oxidation treatment is 673 K, which effectively purifies the surface of ND and introduces appropriate C=O functional groups. NDs are uniformly distributed in the aluminum matrix, and no harmful Al4C3 phase is formed. With an increase in the volume fraction of NDs, the grain size of the matrix first decreases and then increases, and the ultimate compressive strength first increases and then decreases. The volume fraction of ND with better comprehensive performance is 3% and the yield strength increased by 19%.

Sign in / Sign up

Export Citation Format

Share Document