Fabrication of Aluminum Nanocomposite by Ultrasonic Spray Deposited Sheet Bonding

2014 ◽  
Author(s):  
Mina Bastwros ◽  
Gap-Yong Kim ◽  
Jie Wang
Keyword(s):  
Laminate Composite ◽  
Spray Deposition ◽  
Matrix Material ◽  
Reference Sample ◽  
Nano Particles ◽  
Ultrasonic Spray ◽  
The Matrix ◽  
Three Point Bend Test ◽  
Point Bend ◽  
Semi Solid

Reinforcement with nano-sized particles offers a promising potential to significantly enhance the mechanical, electrical, and thermal properties of a metal matrix composite (MMC). One of the challenges of synthesizing nanocomposites, however, has been the dispersion and control of the nano-reinforcement materials. In this study, a laminate nanocomposite has been synthesized by incorporating ultrasonic spray deposition technique. An ultrasonic spray deposition system was used to deposit nano-particles on substrate foils, which were consolidated to synthesize a laminate composite. Aluminum 6061 (Al6061) alloy foils were used as the matrix material. Nano-silicon carbide (SiC) particles were used as the reinforcement phase (deposited layer). The sprayed foils were stacked together to form the composite. The composite was then consolidated by hot compaction in the semi-solid regime of the Al6061. A three point bend test was carried out to evaluate the mechanical properties. In addition, the suspension and spraying parameters that control the deposited microstructure was studied to help control the final properties of the deposited structure. The yield and ultimate flexural strength of the SiC sprayed Al6061 laminate composite showed an increase (32% and 15%, respectively) compared with that of the unsprayed sample (reference sample) processed at the same condition.

Fabrication of Metal Laminate Composites with Interface Reinforcement by Semi-Solid Sintering

2016 ◽  
Vol 256 ◽  
pp. 205-215
Author(s):  
Mina M.H. Bastwros ◽  
Gap Yong Kim
Keyword(s):  
Spray Deposition ◽  
Matrix Material ◽  
Reference Sample ◽  
Az31 Alloy ◽  
Laminate Composites ◽  
Nanoparticle Layer ◽  
The Matrix ◽  
Magnesium Az31 ◽  
Three Point Bend Test ◽  
Semi Solid

Semi-solid sintering technique has been introduced to alter the interfaces of a metal laminate composite material. A thin layer of reinforcement nanoparticles was applied on substrate metallic sheets using an ultrasonic spray deposition method. The sheets were then stacked, pressed, and sintered in the semi-solid regime of the metallic sheet. The liquid phase present in the matrix material penetrates and diffuses into the nanoparticle layer during consolidation and helps to form a gradual, nanostructured interface. Aluminum (Al6061) and magnesium (AZ31) alloy foils were used as the matrix sheets while various species of reinforcement particles were investigated, including silicon carbide (SiC), silicon (Si), and a mix of Si+SiC. Multilayered metal composites with nanostructured interfaces were successfully consolidated and were evaluated by performing a three-point bend test. AZ31 composites reinforced with SiC nanoparticle interface showed an improvement of 49% in flexural yield strength when compared with a reference sample without such interfaces.

Fabrication of Custom Pattern Reinforced AZ31 Multilayer Composite Using Ultrasonic Spray Deposition

2016 ◽  
Author(s):  
Mina Bastwros ◽  
Gap-Yong Kim
Keyword(s):  
Spray Deposition ◽  
Matrix Material ◽  
Multilayer Composite ◽  
Nano Structure ◽  
Nanoscale Structures ◽  
Punch Test ◽  
Ultrasonic Spray ◽  
The Matrix ◽  
Multiscale Structures ◽  
Micro Patterns

Mimicking the unique hierarchical, multiscale structures of natural biological materials is a promising approach to create novel materials with outstanding properties. One of the challenges, however, is the lack of scalable fabrication methods capable of making such complex structures. In this study, a multilayer nanocomposite has been synthesized by incorporating an ultrasonic spray deposition technique. The spray deposition system was used to deposit nanoparticles on substrate foils, which were consolidated to synthesize the multilayer composite. A patterned mask was used to create micro-patterns with nanoscale structures. A magnesium alloy, AZ31, foils were used as the matrix material. A mixture of nano-silicon carbide (nano-SiC) and aluminum alloy, Al6061, particles was used as the reinforcement phase in the deposited patterns. A three point bend test and a small punch test were carried out to evaluate the mechanical properties. A multilayer composite consisting of circular micro-patterns with SiC nano-structure was successfully created. The patterned composite showed an enhancement in the flexural yield strength and the flexural ultimate strength of 43% and 30% respectively, compared with the uniform multilayer composite without the patterns.

Fabrication of Aluminum–SiC Laminate Nanocomposite by Ultrasonic Spray Deposited Sheet Bonding1

2015 ◽  
Vol 3 (3) ◽  
Author(s):  
Mina Bastwros ◽  
Gap-Yong Kim
Keyword(s):  
Laminate Composite ◽  
Metal Composite ◽  
Metal Composites ◽  
Sic Nanoparticles ◽  
Suspension Parameters ◽  
Ultrasonic Spray ◽  
Spraying Parameters ◽  
Hot Compaction ◽  
Three Point Bend Test ◽  
Point Bend

One of the challenges in making layered metal composites reinforced at interfaces has been controlling the dispersion and microstructure of the reinforcement particles. The reinforcement elements are typically applied at the interface by manual spreading using brush or by immersing the substrate in a suspension. In this study, an ultrasonic spraying technique has been used to deposit silicon carbide (SiC) nanoparticles on aluminum 6061 (Al6061) substrate foils to fabricate a laminate metal composite to control the deposited structure. The suspension parameters and the spraying parameters were investigated, and their influence on the deposited microstructure was analyzed. The laminate composite was consolidated using hot compaction, and a three-point bend test was performed to evaluate the mechanical properties. The yield and ultimate flexural strengths of the laminate composite reinforced with SiC nanoparticles increased by 32% and 15%, respectively, compared with those of the unreinforced sample prepared at the same condition.

Preparation and Characterization of Hybrid Aluminum Matrix Composites Reinforced with MWCNT Using Powder Metallurgy Process

2015 ◽  
Vol 813-814 ◽  
pp. 620-624
Author(s):  
S. Dhandapani ◽  
T. Rajmohan ◽  
K. Palanikumar ◽  
Charan Mugunthan
Keyword(s):  
Mechanical Properties ◽  
Powder Metallurgy ◽  
Metal Matrix ◽  
Matrix Material ◽  
Aluminum Matrix ◽  
Nano Particles ◽  
Aluminum Matrix Composites ◽  
The Matrix ◽  
Carbon Nano Tubes

Metal Matrix Nano Composites (MMNC) consist of a metal matrix reinforced with nano-particles featuring physical and mechanical properties very different from those of the matrix. Especially carbon Nano tubes (CNT) can improve the matrix material in terms of wear resistance, damping properties and mechanical strength. The present investigation deals with the synthesis and characterization of aluminium matrix reinforced with micro B4C particles, and Multi Wall Carbon nano Tubes (MWCNT) were prepared by powder metallurgy route. Powder mixture containing fixed weight (%) of B4C and different wt% of MWCNT as reinforcement constituents that are uniaxial cold pressed and later green compacts are sintered in continues electric furnace. Microstructure and Mechanical properties such as micro hardness and density are examined. Micro structure of samples has been investigated using scanning electron microscope (SEM) .The results indicated that the increase in wt % of MWCNT improves the bonding and mechanical properties.

FEM Modelling Techniques for Three Point Bend Test of Rubber Composites

2018 ◽  
Vol 919 ◽  
pp. 257-265 ◽  
Author(s):  
Jan Kledrowetz ◽  
Jakub Javořík ◽  
Rohitha Keerthiwansa ◽  
Pavel Nekoksa
Keyword(s):  
Test Sample ◽  
Bend Test ◽  
Rubber Matrix ◽  
Vertical Force ◽  
The Matrix ◽  
Composite Models ◽  
Modelling Techniques ◽  
Point Bend Test ◽  
Three Point Bend Test ◽  
Point Bend

This paper studies different modelling methodologies for a calculation of the three point bend test. Test samples are composed of a rubber matrix and either steel or textile cords reinforcement. Prior to the bending tests, all of the used materials including the matrix and the reinforcement were measured to find out their mechanical properties. Rubber materials were described using hyperelastic models. FEM software MSC Marc/Mentat is employed as a calculation tool and its various functionalities are utilized for a description of the test composite models. The main observed outcome is a dependence of the vertical force causing the test sample deformation on the amount of the deformation. Calculated results are compared to each other and to measurements. Then, all the modelling techniques are evaluated.

Semi-Solid Processing of Nano-SiCP/ Al-Si Composites and Mechanical Properties with Rheo-Casting

2019 ◽  
Vol 285 ◽  
pp. 33-38
Author(s):  
Shu Sen Wu ◽  
Du Yuan ◽  
Qiang Chen ◽  
Shu Lin Lü ◽  
Zhi Wei Huang
Keyword(s):  
A356 Alloy ◽  
Average Diameter ◽  
Sem Analysis ◽  
Nano Particles ◽  
Mechanical Stirring ◽  
Sic Particles ◽  
New Process ◽  
The Matrix ◽  
A356 Aluminum ◽  
Semi Solid

Generally nano-SiC particles are difficult to be added into molten aluminum metals because of poor wettability. Nano-SiC particles reinforced A356 aluminum alloy composites were prepared by a new process, i.e., a molten-metal process combined with mechanical stirring at semi-solid state and ultrasonic vibration method. The nano particles were β-SiCp with an average diameter of 40 nm, and pre-oxidized at about 850°C to form an oxide layer with thickness of approximately 3.6 nm. The SEM analysis results show that nano-SiC particles are dispersed well in the matrix and no serious agglomeration is observed. The tensile strength and elongation of the 2wt.% nano-SiCp/A356 composite in as-cast state are 259 MPa and 5.3%, and they are improved by 20% and 15% respectively compared with those of the A356 alloy.

Polishing process effect on the image of dispersed precipitates

1984 ◽  
Vol 42 ◽  
pp. 534-535
Author(s):  
C.T. Hu ◽  
C.W. Allen
Keyword(s):  
Matrix Material ◽  
Specimen Preparation ◽  
Second Phase ◽  
Precipitate Particle ◽  
Polishing Process ◽  
Second Phase Particles ◽  
The Matrix ◽  
Surface Profiles ◽  
Thinning Process

One important problem in determination of precipitate particle size is the effect of preferential thinning during TEM specimen preparation. Figure 1a schematically represents the original polydispersed Ni3Al precipitates in the Ni rich matrix. The three possible type surface profiles of TEM specimens, which result after electrolytic thinning process are illustrated in Figure 1b. c. & d. These various surface profiles could be produced by using different polishing electrolytes and conditions (i.e. temperature and electric current). The matrix-preferential-etching process causes the matrix material to be attacked much more rapidly than the second phase particles. Figure 1b indicated the result. The nonpreferential and precipitate-preferential-etching results are shown in Figures 1c and 1d respectively.

Application of cross correlation to HREM images of surfaces

1987 ◽  
Vol 45 ◽  
pp. 754-755
Author(s):  
D. E. Luzzi ◽  
L. D. Marks ◽  
M. I. Buckett
Keyword(s):  
Cross Correlation ◽  
A Priori ◽  
Matrix Material ◽  
Correlation Method ◽  
Accurate Knowledge ◽  
Complex Image ◽  
Fourier Filtering ◽  
The Matrix ◽  
Low Pass ◽  
Data Reduction Technique

As the HREM becomes increasingly used for the study of dynamic localized phenomena, the development of techniques to recover the desired information from a real image is important. Often, the important features are not strongly scattering in comparison to the matrix material in addition to being masked by statistical and amorphous noise. The desired information will usually involve the accurate knowledge of the position and intensity of the contrast. In order to decipher the desired information from a complex image, cross-correlation (xcf) techniques can be utilized. Unlike other image processing methods which rely on data massaging (e.g. high/low pass filtering or Fourier filtering), the cross-correlation method is a rigorous data reduction technique with no a priori assumptions.We have examined basic cross-correlation procedures using images of discrete gaussian peaks and have developed an iterative procedure to greatly enhance the capabilities of these techniques when the contrast from the peaks overlap.

Impact Strength, Flexural Modulus and Wear Rate of PMMA Composites Reinforced by Eggshell Powders

2020 ◽  
Vol 38 (7A) ◽  
pp. 960-966
Author(s):  
Aseel M. Abdullah ◽  
Hussein Jaber ◽  
Hanaa A. Al-Kaisy
Keyword(s):  
Impact Strength ◽  
Wear Rate ◽  
Flexural Modulus ◽  
Matrix Material ◽  
Weight Fraction ◽  
Pure Pmma ◽  
Calcination Process ◽  
The Matrix ◽  
The Impact ◽  
Interface Bond

In the present study, the impact strength, flexural modulus, and wear rate of poly methyl methacrylate (PMMA) with eggshell powder (ESP) composites have been investigated. The PMMA used as a matrix material reinforced with ESP at two different states (including untreated eggshell powder (UTESP) and treated eggshell powder (TESP)). Both UTESP and TESP were mixed with PMMA at different weight fractions ranged from (1-5) wt.%. The results revealed that the mechanical properties of the PMMA/ESP composites were enhanced steadily with increasing eggshell contents. The samples with 5 wt.% of UTESP and TESP additions give the maximum values of impact strength, about twice the value of the pure PMMA sample. The calcination process of eggshells powders gives better properties of the PMMA samples compared with the UTESP at the same weight fraction due to improvements in the interface bond between the matrix and particles. The wear characteristics of the PMMA composites decrease by about 57% with increases the weight fraction of TESP up to 5 wt.%. The flexural modulus values are slightly enhanced by increasing of the ESP contents in the PMMA composites.

scholarly journals Self-Reinforced Nylon 6 Composite for Smart Vibration Damping

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1235
Author(s):  
Bidita Salahuddin ◽  
Rahim Mutlu ◽  
Tajwar A. Baigh ◽  
Mohammed N. Alghamdi ◽  
Shazed Aziz
Keyword(s):  
Matrix Material ◽  
Nylon 6 ◽  
Vibration Damping ◽  
Vibration Energy ◽  
Damping Factor ◽  
Passive Vibration Control ◽  
Reinforced Composite ◽  
Coiled Structure ◽  
The Matrix ◽  
3D Printed

Passive vibration control using polymer composites has been extensively investigated by the engineering community. In this paper, a new kind of vibration dampening polymer composite was developed where oriented nylon 6 fibres were used as the reinforcement, and 3D printed unoriented nylon 6 was used as the matrix material. The shape of the reinforcing fibres was modified to a coiled structure which transformed the fibres into a smart thermoresponsive actuator. This novel self-reinforced composite was of high mechanical robustness and its efficacy was demonstrated as an active dampening system for oscillatory vibration of a heated vibrating system. The blocking force generated within the reinforcing coiled actuator was responsible for dissipating vibration energy and increase the magnitude of the damping factor compared to samples made of non-reinforced nylon 6. Further study shows that the appropriate annealing of coiled actuators provides an enhanced dampening capability to the composite structure. The extent of crystallinity of the reinforcing actuators is found to directly influence the vibration dampening capacity.

Sign in / Sign up

Export Citation Format

Share Document