A simple and economical method for the synthesis of steel-reinforced copper composite

2020 ◽  
pp. 002199832095639
Author(s):  
Feras Kafiah ◽  
Jafar Al-Haidary ◽  
Sami Masadeh ◽  
Emad Abdelsalam ◽  
Malek Alkasrawi
Keyword(s):  
Brinell Hardness ◽  
Copper Matrix ◽  
Stir Casting ◽  
Compressive Yield Strength ◽  
Micro Hardness ◽  
Particle Content ◽  
The Matrix ◽  
Copper Matrix Composite ◽  
Steel Particle ◽  
Copper Composite

The present study explores a new method of steel particle-reinforced copper matrix composite synthesis. Steel reinforced copper was prepared by stir casting processing method at variable percentages between 10 wt% and 50 wt%. Characterization and mechanical testing were performed on these composites using a variety of techniques. The results showed that the microstructure of the composites has a uniform distribution of steel particles in the matrix with good interfacial integrity. Brinell hardness, tensile and yield strengths, impact energy and compressive yield strength of the composites increased with increasing steel particle contents. Vickers micro-hardness increased markedly at the interface region between particle and matrix evident by the hardness maps. The friction coefficient increased proportionally with increasing steel particle content in the composite, but the contrary was noticed for accumulative wear amount. A slight decrease in deformability is expected by increasing particle content. A ductile fracture was noticed in fractographs of fracture surfaces. Cracks are propagated in the Cu matrix up to the point of fracture, i.e. not through the interfacial boundaries.

High-temperature mechanical behavior of Al-Cu matrix composites containing diboride particles

2014 ◽  
Vol 21 (1) ◽  
pp. 29-38
Author(s):  
Oscar Marcelo Suárez ◽  
Natalia Cortes-Urrego ◽  
Sujeily Soto-Medina ◽  
Deborah Marty-Flores
Keyword(s):  
High Temperature ◽  
Aluminum Matrix ◽  
Copper Matrix ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Compression Creep ◽  
The Matrix ◽  
Material Creep ◽  
Copper Matrix Composite ◽  
Composite Hardness

AbstractAn aluminum-copper matrix composite reinforced with aluminum diboride particles was studied at high temperature via thermomechanometry experiments. The matrix contained 2 wt% Cu, whereas the amount of boron forming AlB2 ranged from 0 to 4 wt%, i.e., 0 to 8.31 vol% of diboride particles. In the first segment of the research, we demonstrated that larger amounts of AlB2 particles raised the composite hardness even at 300°C. To assess the material creep behavior, another set of specimens were tested under 1 N compression at 400°C and 500°C for 12 h. Higher levels of AlB2 allowed the composites to withstand compression creep deformations at those temperatures. By using existing creep models developed for metal matrix composites we were able to determine that viscous slip deformation was the dominant deformation mechanism for the temperatures and stress levels used in our experiments. Additionally, the computed creep activation energy for these aluminum matrix composites were found comparable to the energies reported for other similar materials, for instance, Al/SiCp composites.

Preparation and Properties of Carbon Nanotubes Reinforced Cu Matrix Composites for Electronic Packaging Application

2013 ◽  
Vol 275-277 ◽  
pp. 1789-1793 ◽  
Author(s):  
Long Shan Xu ◽  
Xiao Hua Chen ◽  
Xing Jun Liu
Keyword(s):  
Carbon Nanotubes ◽  
Electronic Packaging ◽  
Pure Copper ◽  
Copper Matrix ◽  
Matrix Composites ◽  
Composite Powders ◽  
Multi Walled Carbon Nanotube ◽  
The Matrix ◽  
Copper Composite ◽  
Copper Nanocomposites

Multi-walled carbon nanotube (MWCNT) reinforced copper nanocomposites were prepared using a unique spherical MWCNT-implanted copper composite powders. The MWCNTs are homogenously ‘locked’ in the composite and tightly bonded to the matrix, which makes them play excellent reinforcement role on the microhardness compared with the unreinforced pure copper. Although the thermal conductivity is not enhanced for the thermal resistance between the carbon nanotubes and the copper matrix; it is still high enough to be used as electronic packaging materials even the concentration of MWCNTS in the composite is up to 5 wt%. Furthermore, the thermal expansion of the composites decreased apparently with the addition of the carbon nanotubes.

Influence of fly ash particles on tensile and impact behaviour of aluminium (Al/3Cu/8.5Si) metal matrix composites

2014 ◽  
Vol 21 (2) ◽  
pp. 181-189 ◽  
Author(s):  
Krishnan Ravi Kumar ◽  
Kothavady Mylsamy Mohanasundaram ◽  
Ramanathan Subramanian ◽  
Balasubramaniam Anandavel
Keyword(s):  
Fly Ash ◽  
Ductile Failure ◽  
Stir Casting ◽  
Aluminium Matrix ◽  
Matrix Composites ◽  
Particle Content ◽  
Impact Behaviour ◽  
Casting Technique ◽  
Unreinforced Material ◽  
The Matrix

AbstractThe present work aimed to study the tensile and impact behaviour of fly ash particle reinforced aluminium matrix composites. Fly ash particles reinforced aluminium (Al/3Cu/8.5Si) matrix composites were fabricated by the stir casting technique. Three different size ranges of fly ash particles (50–75, 75–103 and 103–150 μm) were used. The composites were subjected to tensile and impact tests. The tensile and impact fracture surfaces of the aluminium alloy and composites were investigated using a scanning electron microscope to characterise the fracture mechanism of the composites. The tensile strength of composites increased, while the ductility and impact strength of composites decreased with an increase in fly ash particle content. The fracture surface of the unreinforced material was characterised by uneven distribution of a large number of dimples resulting in ductile failure. In the case of composites, the presence of hard and brittle reinforcement particles in the ductile aluminium matrix places constraints on the plastic flow of the matrix leading to brittle failure with an increase in fly ash particles.

High Volume Fraction Carbide Reinforced Copper Matrix Composites for Sliding Contact Applications

2007 ◽  
Vol 561-565 ◽  
pp. 627-630
Author(s):  
Farid Akhtar
Keyword(s):  
Volume Fraction ◽  
High Volume ◽  
Copper Matrix ◽  
Sliding Contact ◽  
Interface Debonding ◽  
Matrix Composites ◽  
Copper Matrix Composites ◽  
The Matrix ◽  
Copper Matrix Composite ◽  
Composite Hardness

This study deals with the processing, microstructure and properties of the carbide reinforced copper matrix composites. Powder technology was used to successfully fabricate the composites. NbC particulates were used as reinforcements for copper matrix. The microstructure of the composite was characterized by scanning electron microscopy. The microstructural study revealed that the NbC particles were distributed uniformly in the matrix phase. No interface debonding and micro- cracks were observed in the composite. NbC particles were found in round shape in copper matrix composite. The composite hardness of 78 HRA was found with 60vol% NbC content. Electrical conductivity as high as 7%IACS was achieved. The wear performance and conductivity value predicts that NbC reinforced copper matrix composites can be used as sliding contact applications.

Properties and Spot Welding Performance of Copper Composite Reinforced with Recycled Tungsten Carbide

2010 ◽  
Vol 154-155 ◽  
pp. 1485-1488
Author(s):  
Zuhailawati Hussain ◽  
Indra Putra Almanar
Keyword(s):  
Electrical Conductivity ◽  
Tungsten Carbide ◽  
Spot Welding ◽  
Copper Matrix ◽  
Raw Material ◽  
Composite Electrodes ◽  
Welding Operation ◽  
Metal Metal ◽  
Copper Matrix Composite ◽  
Copper Composite

In this work, properties and spot welding performance of copper matrix composite electrode reinforced with 15 vol% tungsten carbide particulate from inexpensive raw material were investigated. Mixture of copper and recycled tungsten carbide was milled, compacted, sintered and powder forged at different pressures. Higher forging pressure resulted in higher density and electrical conductivity as it accelerates the flow of copper matrix leading to porosity elimination and improves metal-metal contact within the copper matrix by reducing porosity and oxide film. Welding operation showed that composite electrodes with higher density, electrical conductivity and hardness forms larger and stronger spot weld.

Mechanical Behavior of CNTs/SiCp/AZ91D Magnesium Matrix Composites

2011 ◽  
Vol 694 ◽  
pp. 635-639 ◽  
Author(s):  
Wei Xue Li ◽  
Yun Feng Nie ◽  
Dun Dong Wang
Keyword(s):  
Mechanical Properties ◽  
Casting Process ◽  
Matrix Alloy ◽  
Stir Casting ◽  
Matrix Composites ◽  
Micro Hardness ◽  
Magnesium Matrix ◽  
Magnesium Matrix Composites ◽  
Resistance To Deformation ◽  
The Matrix

AZ91D alloy composites reinforced by CNTs/SiCp were fabricated using stir casting process. The mechanical properties of the composites were tested, observed and analyzed the microstructure, the fractographs were observed and analyzed via scanning electron microscope. The results showed that CNTs/SiCp could not only refine the grains of the composites, but also bear the load of resistance to deformation. Compared with the matrix alloy, the tensile strength, the elastic modulus, the micro-hardness and the elongation rate of the composites had been enhanced significantly. But the mechanical properties would be fell down with the more addition of CNTs/SiCp.

Effect of Cooling Rate on Mechanical and Electrical Properties of Cu-TiB2 by Turbulent In-Situ Mixing Process

2007 ◽  
Vol 119 ◽  
pp. 135-138 ◽  
Author(s):  
J.S. Park ◽  
J.H Yun ◽  
Young Do Park ◽  
Yong Ho Park ◽  
Kyung Mok Cho ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Cooling Rate ◽  
Copper Matrix ◽  
Mixing Process ◽  
Transitional Layer ◽  
Mechanical And Electrical Properties ◽  
The Matrix ◽  
Copper Matrix Composite ◽  
Tib2 Particles

A copper matrix composite reinforced with in situ TiB2 nanoparticle was successfully fabricated by tubulent in-situ mixing process. The microstructure, mechanical and electrical properties of the in situ composite were investigated. The results showed that the in situ formed TiB2 particles, in which size varying from about 50nm to 200nm, exhibited a homogenous dispersion in the copper matrix. It is shown that the interface between the nanoscale particles and the matrix was clean without a transitional layer. Because of the reinforcement, the hardness and Young’s Modulus of the composite improved with increment of cooling rate. Moreover, the in situ Cu-TiB2 composite exhibited higher electrical conductivity with increasing of cooling rate.

Preparation and properties of copper matrix composite reinforced with SLM Fe alloy lattice

2019 ◽  
Vol 6 (5) ◽  
pp. 056530
Author(s):  
Huiyan Xu ◽  
Zhenhua Li ◽  
Baoren Teng ◽  
Bo Ren ◽  
Xin Li
Keyword(s):  
Matrix Composite ◽  
Copper Matrix ◽  
Copper Matrix Composite

scholarly journals Investigation of the microstructure evolution in TP347HFG austenitic steel at 700°C and its characterization method

2021 ◽  
Vol 40 (1) ◽  
pp. 12-22
Author(s):  
Yuetao Zhang ◽  
Tingbi Yuan ◽  
Yawei Shao ◽  
Xiao Wang
Keyword(s):  
Austenitic Steel ◽  
Aging Time ◽  
Microstructure Evolution ◽  
Precipitate Phase ◽  
Dispersion Strengthening ◽  
Micro Hardness ◽  
Dispersed Particles ◽  
Nonlinear Ultrasonic ◽  
The Matrix ◽  
Solution Strengthening

Abstract This article reports the microstructure evolution in TP347HFG austenitic steel during the aging process. The experiments were carried out at 700°C with different aging time from 500 to 3,650 h. The metallographic results show that the coherent twin and incoherent twin are existed in the original TP347HFG grains, while they gradually vanished with the increase of the aging time. After aging for 500 h, a lot of fine, dispersed particles precipitated from the matrix, but they disappeared after aging for 1,500 h. When the aging time extend to 3,650 h, the precipitates appeared apparently coarse in TP347HFG steel, which include the M23C6 and σ phase; besides, the micro-hardness of TP347HFG also changes during the aging, which was closely related to the effect of dispersion strengthening and solution strengthening. The results of the nonlinear ultrasonic measurement reveal that the β′ of TP347HFG steel was also changed with the aging time. It first increased at 0–500 h, then reduced later, and increased finally at 1,500–3,650 h. The variation of β′ in TP347HFG was influenced by a combined effect of the twin microstructure and the precipitate phase, which indicate that the nonlinear ultrasonic technique can be utilized to characterize the microstructure evolution in TP347HFG.

Mechanical characterization of LM25 alloy matrix composite reinforced with boron carbide

2021 ◽  
pp. 002199832110055
Author(s):  
Zeeshan Ahmad ◽  
Sabah Khan
Keyword(s):  
Tensile Strength ◽  
Boron Carbide ◽  
Mechanical Characterization ◽  
Stir Casting ◽  
Surface Mapping ◽  
Alloy Matrix ◽  
Casting Technique ◽  
The Matrix ◽  
Carbide Particles

Alumnium alloy LM 25 based composites reinforced with boron carbide at different weight fractions of 4%, 8%, and 12% were fabricated by stir casting technique. The microstructures and morphology of the fabricated composites were studied by scanning electron microscopy and energy dispersive spectroscopy. Elemental mapping of all fabricated composites were done to demonstrate the elements present in the matrix and fabricated composites. The results of microstructural analyses reveal homogenous dispersion of reinforcement particles in the matrix with some little amount of clustering found in composites reinforced with 12% wt. of boron carbide. The mechanical characterization is done for both alloy LM 25 and all fabricated composites based on hardness and tensile strength. The hardness increased from 13.6% to 21.31% and tensile strength 6.4% to 22.8% as reinforcement percentage of boron carbide particles increased from 0% to 12% wt. A fractured surface mapping was also done for all composites.

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