Study of Microstructure and Mechanical Properties of Sintered Aluminum Alloy Composite Reinforced with Al2O3 Nanoparticles

2013 ◽  
Vol 849 ◽  
pp. 62-68 ◽  
Author(s):  
R. Senthilkumar ◽  
N. Arunkumar ◽  
M. Manzoor Hussian ◽  
R. Vijayaraj
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Powder Metallurgy Method ◽  
Matrix Composites ◽  
X Ray Diffraction ◽  
Optimum Amount ◽  
X Ray ◽  
Sintered Aluminum ◽  
Superior Mechanical Properties ◽  
Composite Samples

In this research, aluminum alloy AA2014 matrix composites reinforced with micron (10% wt 5% wt) and nanoparticles (1% wt 5% wt) of Al2O3were fabricated through powder metallurgy method. Optimum amount of reinforcement were determined by evaluating mechanical properties like micro-hardness and compressive strength of composites. The composite samples were characterized by scanning electron microscopy (SEM) and X-ray diffraction (XRD). The results reveal that the composites containing 2% wt of nanoAl2O3and 8 % micro Al2O3reinforcement has homogenous microstructure as well as superior mechanical properties.

MICROSTRUCTURE AND MECHANICAL PROPERTIES OF HYPEREUTECTIC Al-Si/AlNp COMPOSITE

2009 ◽  
Vol 23 (06n07) ◽  
pp. 1377-1382 ◽  
Author(s):  
SEULKI PARK ◽  
JINMYUNG CHOI ◽  
BONGGYU PARK ◽  
IKMIN PARK ◽  
YONGHO PARK ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Energy Dispersive Spectrometer ◽  
Microstructural Characterization ◽  
Weight Fraction ◽  
Reinforcement Particle ◽  
Hot Press ◽  
X Ray Diffraction ◽  
X Ray ◽  
Superior Mechanical Properties ◽  
Phase Evaluation

Hypereutectic Al - Si alloys with fine and evenly distributed Si precipitates have superior mechanical properties In this study, hypereutectic Al - Si alloy powders which contained 15 and 20wt% Si were prepared by a gas atomization process. 1, 3 and 5wt% AlN particles were blended with the Al - Si alloy powders using turbular mixer. The mixture was consolidated by Hot Press at 550°C for 1h under 60MPa. Relative density of the sintered samples was about 98% of theoretical density. This study was investigated by two ways. One is the effect of reinforcement weight fraction and the other is the effect of Silicon contents on the mechanical properties of the composite. Microstructural characterization and phase evaluation were carried out using X-ray Diffraction, Scanning Electron Microscopy equipped with Energy Dispersive Spectrometer. The results showed that the smaller the reinforcement particle size was and the better its distribution was, the higher ultimate tensile strength and hardness were.

Biodegradable Nanocomposites of Poly(hydroxybutyrate-co-hydroxyvalerate): The Effect of Nanoparticles

2008 ◽  
Vol 8 (4) ◽  
pp. 1858-1866 ◽  
Author(s):  
Pralay Maiti ◽  
Jaya P. Prakash Yadav
Keyword(s):  
Mechanical Properties ◽  
Layered Silicate ◽  
Layered Silicates ◽  
Thermal And Mechanical Properties ◽  
X Ray Diffraction ◽  
X Ray ◽  
Silicate Nanocomposites ◽  
Transmission Electron ◽  
Superior Mechanical Properties ◽  
Biodegradable Nanocomposites

Copolymer of hydroxybutyrate and hydroxyvalerate, P(HB-HV)/layered silicate or hydroxyapatite nanocomposites were prepared via melt extrusion. The nanostructure, as observed from wide-angle X-ray diffraction and transmission electron microscopy, indicate intercalated hybrids for layered silicates. Hydroxyapatite of nanometer dimension is uniformly distributed in matrix copolymer. The nanohybrids show significant improvement in thermal and mechanical properties of the copolymer as compared to the neat copolymer. The layered silicate nanocomposites exhibit superior mechanical properties as compared to hydroxyapatite nanohybrid. The thermal expansion coefficient is significantly reduced in nanohybrids. The biodegradability of pure copolymer and its nanocomposites were studied at room temperatures under controlled conditions in compost media. The rate of biodegradation of copolymer is enhanced dramatically in the nanohybrids. Hydroxyapatite hybrid shows highest rate of biodegradation. The change in biodegradation is streamlined in terms of nature of nanoparticles used to prepare hybrids.

Influence of B4C on enhancing mechanical properties of AA2014 aluminum matrix composites

2021 ◽  
pp. 095440622110585
Author(s):  
Memduh Kara ◽  
Tolga Coskun ◽  
Alper Gunoz
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Wear Resistance ◽  
Aluminum Matrix ◽  
Good Method ◽  
Aluminum Matrix Composites ◽  
Phase Identification ◽  
Matrix Composites ◽  
X Ray Diffraction ◽  
X Ray

Aluminum is a material with advantageous properties such as lightness, good conductivity, high plastic deformation ability, and superior corrosion resistance. However, aluminum and many aluminum alloys have disadvantages in terms of mechanical properties such as hardness, tensile strength, and wear resistance. To overcome this disadvantage of aluminum, it is a good method to add ceramic particles to the matrix. For this purpose, in this study, B4C (boron carbide)-reinforced AA2014 aluminum matrix composites were fabricated at 3%, 5%, and 7% reinforcement ratios using the stir casting method. Tensile tests, wear tests, cutting force measurements, and microhardness measurements were performed to determine the fabricated composite materials’ mechanical properties. Scanning electron microscopy and optical microscopy were used to analyze the microstructure of composite. X-ray diffraction analysis was utilized to study the phase identification. As a result of the study, it was observed that with the increase in the B4C reinforcement ratio, the mechanical properties of the aluminum matrix composite material, such as wear resistance, cutting strength, and hardness, increased. On the other hand, the change in tensile strength did not occur in this way. Tensile strength first increased and then decreased. The highest value of tensile strength was achieved at 5% B4C reinforcement. X-ray diffraction results showed that AA2014 and B4C were the fundamental elements in composites and are free from intermetallics.

Research on the Microstructure and Mechanical Properties of Spray-Deposited 8009 Heat Resistant Aluminum Alloy

2014 ◽  
Vol 543-547 ◽  
pp. 3733-3736
Author(s):  
Rong Hua Zhang ◽  
Biao Wu ◽  
Xiao Ping Zheng
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Tensile Tests ◽  
Test Results ◽  
Secondary Phases ◽  
X Ray Diffraction ◽  
X Ray ◽  
Heat Resistant ◽  
Microstructure And Mechanical Properties ◽  
Transmission Electron

In this study, 8009 heat resistant aluminum alloy was synthesized by the spray atomization and deposition technique. The microstructure and mechanical properties of the alloy were studied using transmission electron microscopy, X-ray diffraction, and tensile tests. The secondary phases in the microstructure of the spray-deposited alloy were examined. The tensile test results indicate that the spray-deposited 8009 alloy both at room and elevated temperature displays superior tensile strength due to the presence of the thermally stable Al12(Fe,V)3Si particles.

Studies on Mechanical Properties and Microstructure of Al2O3 Reinforced AA5083 Matrix Composite 

2014 ◽  
Vol 592-594 ◽  
pp. 749-754 ◽  
Author(s):  
R. Senthilkumar ◽  
N. Arunkumar ◽  
M. Manzoor Hussian ◽  
R. Vijayaraj
Keyword(s):  
Mechanical Properties ◽  
X Ray Diffraction ◽  
Alloy Matrix ◽  
Aerospace Applications ◽  
Aa5083 Alloy ◽  
The Matrix ◽  
Superior Mechanical Properties ◽  
Frame Work ◽  
Work Aluminum Alloy ◽  
Composite Samples

The expectations over novel composite materials have been increased especially in automotive and aerospace applications due to its superior weight to strength ratio and tailored mechanical properties. In this frame work, aluminum alloy AA5083 alloy matrix reinforced with micron (10% wt – 5% wt) and nanoparticles (1% wt – 5% wt) of Al2O3.The composite samples were fabricated through powder metallurgy route. Optimum amount of reinforcement were determined by evaluating mechanical properties like micro-hardness and compressive strength of composites. The characterizations were probed by Scanning Electron Microscope (SEM) and X-ray Diffraction (XRD) methods. The results reveal that the composites containing 2% wt of nanoAl2O3and 8 % micro Al2O3reinforcement witnessed superior mechanical properties due to its combined effect of concentration and particulate scale and the great isotropic behavior was achieved by homogenous dispersion of reinforcement in the matrix phase.

scholarly journals Silk/Natural Rubber (NR) and 3,4-Dihydroxyphenylalanine (DOPA)-Modified Silk/NR Composites: Synthesis, Secondary Structure, and Mechanical Properties

Molecules ◽  
2020 ◽  
Vol 25 (1) ◽  
pp. 235
Author(s):  
Hiromitsu Sogawa ◽  
Treratanakulwongs Korawit ◽  
Hiroyasu Masunaga ◽  
Keiji Numata
Keyword(s):  
Mechanical Properties ◽  
Secondary Structure ◽  
Natural Rubber ◽  
Chemical Structure ◽  
Attenuated Total Reflection ◽  
X Ray Diffraction ◽  
X Ray ◽  
Superior Mechanical Properties ◽  
Effective Reinforcement ◽  
Β Sheet

Silk composites with natural rubber (NR) were prepared by mixing degummed silk and NR latex solutions. A significant enhancement of the mechanical properties was confirmed for silk/NR composites compared to a NR-only product, indicating that silk can be applied as an effective reinforcement for rubber materials. Attenuated total reflection Fourier transform infrared (ATR-FTIR) and wide-angle X-ray diffraction (WAXD) analysis revealed that a β-sheet structure was formed in the NR matrix by increasing the silk content above 20 wt%. Then, 3,4-dihydroxyphenylalanine (DOPA)-modified silk was also blended with NR to give a DOPA-silk/NR composite, which showed superior mechanical properties to those of the unmodified silk-based composite. Not only the chemical structure but also the dominant secondary structure of silk in the composite was changed after DOPA modification. It was concluded that both the efficient adhesion property of DOPA residue and the secondary structure change improved the compatibility of silk and NR, resulting in the enhanced mechanical properties of the formed composite. The knowledge obtained herein should contribute to the development of the fabrication of novel silk-based elastic materials.

Preparation and Properties of Ti5Si3 Matrix Composites Reinforced by Carbon Nanotube

2010 ◽  
Vol 105-106 ◽  
pp. 195-198
Author(s):  
Xin Fang Cui ◽  
Shuang Quan Fang ◽  
Ying Jie Qiao ◽  
Qi Jia
Keyword(s):  
Mechanical Properties ◽  
Carbon Nanotubes ◽  
Bending Strength ◽  
Matrix Composites ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron Microcopy ◽  
Main Fracture ◽  
Hot Pressing Sintering ◽  
Properties Of Composites

Ti5Si3 matrix composites reinforced by carbon nanotubes were fabricated by vacuum hot pressing sintering. X-ray diffraction and scanning electron microcopy were carried out to analyze the phase and microstructure of the composites. The effects of carbon nanotubes on mechanical properties were investigated. Experimental results showed that the nanotubes partly reacted with Ti and Si powders to obtain Ti5Si3 and Ti3SiC2, TiSi2 when the sintering temperature is about 1380oC. The mechanical properties of composites can be affected by carbon nanotubes. Meanwhile, the maximal increments of Vickers hardness, bending strength and fracture toughness of the composites, compared with the Ti5Si3 matrix, were 62.9%, 160.9% and 159.3%, respectively. Both of transgranular and intergranular fracture in the composites were the main fracture mode. The fracture manners of composites mainly include “bridging” of CNTs, “deflection” of minor phases and the evolution of grain.

Characterization of mechanically alloyed Fe based and MoNiAl+Al2O3 reinforced composites

2021 ◽  
Vol 63 (4) ◽  
pp. 368-372
Author(s):  
S. Osman Yilmaz ◽  
Tanju Teker ◽  
Hüseyincan Eker
Keyword(s):  
High Volume ◽  
Matrix Composites ◽  
Reinforced Composites ◽  
Micro Hardness ◽  
X Ray Diffraction ◽  
Mechanically Alloyed ◽  
Surface Mapping ◽  
X Ray ◽  
Composite Samples

Abstract Fe-MoNiAl-Al2O3 powders were mechanically alloyed by a SPEX type attritor. The Fe based composite samples were reinforced with complex mechanically alloyed Fe-MoNiAl-Al2O3 particles in different ratios and Fe matrix composites were obtained. Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), elemental surface mapping and microhardness tests were used to analyze the microstructures of the composites. The sintered composites showed that thin Al2O3 particles were dispersed. High volume fractions of the reinforcement having nanometer dimensions were produced in metallic matrices. Additionally, as the content of Al2O3 increased, the micro-hardness increased, which indicates that fine Al2O3 particles had a reinforcing effect.

Effects of Zr Contents on the Microstructure, Mechanical Properties and Biocompatibility of Ta-Zr Alloys

2018 ◽  
Vol 914 ◽  
pp. 37-44 ◽  
Author(s):  
Lin Chang ◽  
Jue Liu ◽  
Hai Lin Yang ◽  
Jian Ming Ruan ◽  
Shou Xun Ji
Keyword(s):  
Mechanical Properties ◽  
Second Phase ◽  
Powder Metallurgy Method ◽  
Sintering Process ◽  
X Ray Diffraction ◽  
Hard Tissue ◽  
Vacuum Sintering ◽  
X Ray ◽  
Surface Morphologies ◽  
Zr Alloys

Ta-xZr (x = 90, 80, 70, 60 at.%) alloys with good mechanical properties and high density were prepared by powder metallurgy method and vacuum sintering technology. The surface morphologies and mechanical properties were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray energy dispersive spectroscopy (EDS). The results showed that lamellar Ta was observed with no second phase during the sintering process. The tensile strength and the Young's modulus increased with the Ta contents firstly and then decreased, and varied with the Ta contents in the range of 60.5 ± 5.03~163.0 ± 10.11 MPa and 4.5 ± 0.47~11.8 ± 1.16 GPa, respectively. In conclusion, The Ta-70Zr alloy is potentially useful in the hard tissue implants for its mechanical properties and biocompatibility.

Microstructure Evolution and Mechanical Properties of 7A09 Aluminum Alloy during Rapid Solidifications

2009 ◽  
Vol 79-82 ◽  
pp. 1791-1794 ◽  
Author(s):  
Wei Wei Wang ◽  
Bin Bin Jia ◽  
Jing Bo Yu
Keyword(s):  
Mechanical Properties ◽  
Aluminum Alloy ◽  
Aluminum Alloys ◽  
Rapid Solidification ◽  
Microstructure Evolution ◽  
Hardness Measurement ◽  
X Ray Diffraction ◽  
X Ray ◽  
Microstructure Characteristics ◽  
Key Factor

Microstructure evolution and mechanical properties of 7A09 aluminum alloy ribbon prepared by rapid cooling solidification are studied. Single roller is applied to produce rapid solidification ribbon of 7A09 aluminum alloys. Microstructure characteristics and mechanical properties of the rapid solidified ribbon of 7A09 aluminum alloys are studied by means of X-ray diffraction (XRD), scan electron microscopy (SEM) and hardness measurement. The results show that the rotate speed of the roller is the key factor affecting the ability of the forming ribbon. At a roller rotate speed of 1500rpm, the ribbon with a good quality can be obtained. Microstructure features of the rapid solidification ribbon are refined with the increase of the cooling rate, all of the crystals translate into nanocrystalline. All the hardness of the rapid solidification ribbon of 7A09 aluminum alloys is higher than that of the original alloys and increases with the rotate speed of the rotor.

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