scholarly journals Characterisation of Copper-Chrome-Reduced Graphene Oxide Electrical Contact Materials Using Powder Metallurgy Technique

2020 ◽  
Vol 987 ◽  
pp. 012029
Author(s):  
Aseel S. Hamza ◽  
Abdul Raheem K. Abid Ali ◽  
Saad Hameed Al Shafaie
Keyword(s):  
Graphene Oxide ◽  
Powder Metallurgy ◽  
Reduced Graphene Oxide ◽  
Electrical Contact ◽  
Powder Metallurgy Technique ◽  
Contact Materials ◽  
Reduced Graphene ◽  
Electrical Contact Materials

Copper-Based Electronic Materials Prepared by SPS and their Properties

2010 ◽  
Vol 97-101 ◽  
pp. 1730-1735
Author(s):  
Zhong Quan Guo ◽  
Hao Ran Geng ◽  
Bao Chuan Sun
Keyword(s):  
Powder Metallurgy ◽  
Electronic Materials ◽  
Electrical Contact ◽  
Compression Force ◽  
Contact Materials ◽  
Comprehensive Properties ◽  
Sintering Time ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Electrical Contact Materials

Copper-based electrical contact materials were prepared by Spark Plasma Sintering (SPS) method and powder metallurgy with the addition of different proportions of rare earth (RE) element. It is found that SPS method greatly enhances the density, hardness and conductivity of the composite materials, thus improving their comprehensive properties. Compared with powder metallurgy, SPS boasts a shorter sintering time, smaller compression force and higher efficiency. RE has considerable influence on the comprehensive properties of copper-based electrical contact materials. When the content of RE lower than 0.1%, the comprehensive properties can be improved by increasing RE.

scholarly journals Reduced graphene oxide as reinforcement in aluminium nanocomposites prepared by powder metallurgy

2021 ◽  
pp. 47594-47598
Keyword(s):  
Mechanical Properties ◽  
Graphene Oxide ◽  
Elastic Modulus ◽  
Powder Metallurgy ◽  
Reduced Graphene Oxide ◽  
Effective Interaction ◽  
Strength Increase ◽  
Chemical Route ◽  
Reduced Graphene ◽  
Matrix Nanocomposites

This study investigated the use of reduced graphene oxide (rGO) obtained by chemical route as a reinforcement phase in aluminium matrix nanocomposites (AMNCs) fabricated by powder metallurgy. Mechanical milling of a mixture of aluminium and rGO powders was able to form homogeneous and highly densified composites, allowing an effective interaction between matrix and reinforcement to establish. The effect of rGO content (ranging for 0.01 to 1.0 wt%) on the mechanical properties of rGO-AMNCs was investigated. Microhardness, elastic modulus and yield strength increase gradually up to 0.5 wt% with respective gains of 308%, 61% and 86%.

scholarly journals Parameter Characterization in Processing of Silver – Aluminum Based Electrical Contact Materials

2017 ◽  
Vol 62 (3) ◽  
pp. 1895-1901 ◽  
Author(s):  
S. Praveen Kumar ◽  
R. Parameshwaran ◽  
A. Ananthi ◽  
J. Jenil Jaba Sam
Keyword(s):  
Powder Metallurgy ◽  
Tin Oxide ◽  
Electrical Contact ◽  
Cadmium Oxide ◽  
Aluminum Matrix ◽  
Stir Casting ◽  
Vital Role ◽  
Contact Materials ◽  
Potential Applications ◽  
Electrical Contact Materials

AbstractAn electrical contractor is one which plays significant role in day todays life in industries as well as in home appliances. In current scenario the materials for conducting purpose has an overwhelming research capability. Now a day the silver based electrical contact composite material have provided the potential applications in aerospace and automobile industries. Among silver based contact material the silver cadmium oxide and silver tin oxide plays a vital role in fabrication of electrical contactors. In this research an attempt has been made to study the influence of adding Aluminum with silver based electrical contact composite materials by two different processing routes namely stir-casting and powder metallurgy. Silver and aluminum matrix plays a virtual role in composite world owing to their highest conductivity. Optimum parameters were identified for attaining the maximum properties such as conductivity, hardness, density, and porosity of composition. By this better conducting property and mechanical property of the electrical contact can be improved by this system. Thus a screening test has be conducted with addition of Al with silver tin oxide compositions hence this paper aims to process the aluminum - silver based electrical contact materials by stir casting processing and powder metallurgy route and compare the results obtained.

Determination of melamine in food contact materials using an electrode modified with gold nanoparticles and reduced graphene oxide

2015 ◽  
Vol 182 (11-12) ◽  
pp. 1967-1975 ◽  
Author(s):  
Ningning Chen ◽  
Yuxiao Cheng ◽  
Chen Li ◽  
Cuiling Zhang ◽  
Kai Zhao ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Contact Materials ◽  
Food Contact Materials ◽  
Food Contact ◽  
Reduced Graphene

scholarly journals High Oxidation Resistance of CVD Graphene-Reinforced Copper Matrix Composites

Nanomaterials ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 498 ◽  
Author(s):  
Mingliang Wu ◽  
Baosen Hou ◽  
Shengcheng Shu ◽  
Ao Li ◽  
Qi Geng ◽  
...  
Keyword(s):  
Powder Metallurgy ◽  
Oxidation Resistance ◽  
Electrical Contact ◽  
Chemical Vapor ◽  
Surface Oxidation ◽  
Copper Matrix ◽  
Contact Materials ◽  
Graphene Layers ◽  
Electrical Contact Materials ◽  
Pure Cu

Copper-based materials are common industrial products which have been broadly applied to the fields of powder metallurgy, electrical contact, and heat exchangers, etc. However, the ease of surface oxidation limits the durability and effectiveness of copper-based components. Here, we have developed a powder metallurgy process to fabricate graphene/copper composites using copper powders which were first deposited with graphene layers by thermal chemical vapor deposition (CVD). The graphene/copper composites embedded with an interconnected graphene network was then able to be obtained by vacuum hot-pressing. After thermal oxidation (up to 220 °C) in humid air for several hours, we found that the degree of surface oxidation of our samples was much less than that of their pure Cu counterpart and our samples produced a much smaller increase of interfacial contact resistance when used as electrical contact materials. As a result, our graphene/copper composites showed a significant enhancement of oxidation resistance ability (≈5.6 times) compared to their pure Cu counterpart, thus offering potential applications as novel electrical contact materials.

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