Al/Al2O3+Gr Hybrid Composite Compacting Behavior

2015 ◽  
Vol 1114 ◽  
pp. 86-91 ◽  
Author(s):  
Mihaița Adrian Matara ◽  
Ioana Csáki ◽  
Mariana Lucaci ◽  
Magdalena Lungu ◽  
Gabriela Popescu ◽  
...  
Keyword(s):  
Composite Materials ◽  
Powder Metallurgy ◽  
Hybrid Composite ◽  
Metal Matrix ◽  
High Strength ◽  
Matrix Composites ◽  
Powder Density ◽  
Reinforcing Material ◽  
Powder Metallurgy Route ◽  
Lubricating Properties

The researches have been focused on composite materials area, especially hybrid metal matrix composites. A hybrid composite has two or more reinforcing elements and improved properties according to the reinforcing elements used.This paper aims to discuss the Al/Al2O3+Grp behavior at different pressing forces. The composite was processed by a powder metallurgy route. Alumina used as reinforcing material provides a high strength and hardness and graphite provides lubricating properties. The results show that the compressed un-granulated powder has a higher tendency to fracture than the granulated powder. The compressed powder density was almost constant after a pressing force of 600 MPa.

A Review on Composite Materials with Ferrous, CNT and Powder Metallurgy

2015 ◽  
Vol 813-814 ◽  
pp. 9-13 ◽  
Author(s):  
Chakravarthi Parswajinan ◽  
B. Vijaya Ramnath ◽  
M. Vetrivel ◽  
P. Ramanarayanan ◽  
S. Bharath ◽  
...  
Keyword(s):  
Powder Metallurgy ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
High Strength ◽  
Considerable Change ◽  
Matrix Composites ◽  
Mechanical And Electrical Properties ◽  
Powder Metallurgy Process ◽  
High Elongation ◽  
Iron Manganese

Carbon nanotubes are the latest trends in the study of powder metallurgy and nanocomposites. This is due to the exceptional properties like superior mechanical and electrical properties, high Young’s modulus, high tensile strength, smaller diameters, high elongation and high chemical stability. CNT’s is an attractive reinforcement for metal matrix composites. CNT are now reinforced with many metal matrix composites like aluminium, iron, manganese, copper etc. with considerable change in density of the material. Due to high aspect ratio that facilitates their tubular structure and high strength the CNT’s are reinforced with ferrous powder by implying powder metallurgy process and the results have been recorded. Such recordings of the effects of CNT on Ferrous powders are reviewed in this paper.

scholarly journals The effect of process parameters in Aluminum Metal Matrix Composites with Powder Metallurgy

2018 ◽  
Vol 5 ◽  
pp. 7 ◽  
Author(s):  
Vemula Vijaya Vani ◽  
Sanjay Kumar Chak
Keyword(s):  
Powder Metallurgy ◽  
Metal Matrix Composites ◽  
Process Parameters ◽  
Metal Matrix ◽  
Weight Ratio ◽  
High Strength ◽  
Matrix Composites ◽  
Homogeneous Microstructure ◽  
Aluminum Metal ◽  
Aluminum Metal Matrix Composites

Metal Matrix Composites are developed in recent years as an alternative over conventional engineering materials due to their improved properties. Among all, Aluminium Matrix Composites (AMCs) are increasing their demand due to low density, high strength-to-weight ratio, high toughness, corrosion resistance, higher stiffness, improved wear resistance, increased creep resistance, low co-efficient of thermal expansion, improved high temperature properties. Major applications of these materials have been in aerospace, automobile, military. There are different processing techniques for the fabrication of AMCs. Powder metallurgy is a one of the most promising and versatile routes for fabrication of particle reinforced AMCs as compared to other manufacturing methods. This method ensures the good wettability between matrix and reinforcement, homogeneous microstructure of the fabricated MMC, and prevents the formation of any undesirable phases. This article addresses mainly on the effect of process parameters like sintering time, temperature and particle size on the microstructure of aluminum metal matrix composites.

scholarly journals Effect of Sintering Temperature on the Properties of Aluminium-Aluminium Oxide Composite Materials

2016 ◽  
Vol 1 (2) ◽  
pp. 59-64 ◽  
Author(s):  
Dewan Muhammad Nuruzzaman ◽  
Farah Fazira Kamaruzaman ◽  
Nasrah Mohd Azmi
Keyword(s):  
Composite Materials ◽  
Powder Metallurgy ◽  
Metal Matrix ◽  
Sintering Temperature ◽  
Aluminium Oxide ◽  
Weight Fraction ◽  
Matrix Composites ◽  
Sintering Process ◽  
Weight Percentage ◽  
Different Temperatures

In this study, aluminium-aluminium oxide (Al-Al2O3) metal matrix composites of different weight percentage reinforcements of aluminium oxide were processed at different sintering temperatures. In order to prepare these composite specimens, conventional powder metallurgy (PM) method was used. Three types specimens of different compositions such as 95%Al+5%Al2O3, 90%Al+10%Al2O3 and 85%Al+15%Al2O3 were prepared under 20 Ton compaction load. Then, all the specimens were sintered in a furnace at two different temperatures 550oC and 580oC. In each sintering process, two different heating cycles were used. After the sintering process, it was observed that undistorted flat specimens were successfully prepared for all the compositions. The effects of sintering temperature and weight fraction of aluminium oxide particulates on the density, hardness and microstructure of Al-Al2O3 composites were observed. It was found that density and hardness of the composite specimens were significantly influenced by sintering temperature and percentage aluminium oxide reinforcement. Furthermore, optical microscopy revealed that almost uniform distribution of aluminium oxide reinforcement within the aluminium matrix was achieved.

scholarly journals Aerospace Industry and Aluminum Metal Matrix Composites

2021 ◽  
Vol vm02 (is02) ◽  
pp. 73-81
Author(s):  
Sevim Yolcular Karaoglu ◽  
Serdar Karaoglu ◽  
Imgesu Unal
Keyword(s):  
Composite Materials ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Aerospace Industry ◽  
High Strength ◽  
Mechanical And Thermal Properties ◽  
Matrix Composites ◽  
Aluminum Metal ◽  
Strength And Stiffness ◽  
Aluminum Metal Matrix Composites

Researchers have turned to search for new materials that will meet all the aerospace industry requirements. When it is almost impossible to achieve this with a single material, composite materials have been studied, and there have been great developments in this field. Many elements are used in aircraft construction, but aluminum is the most preferred due to its low density, good castability, high strength, corrosion resistance, and good fatigue strength. However, its strength and stiffness limit its usability. To solve this problem, aluminum is combined with various elements. Aluminum metal matrix composites are an example of this. Aluminum metal matrix composites are preferred in aircraft applications due to their high specific modulus and good mechanical and thermal properties. This review provides information on the use of aluminum metal matrix composite materials in the aerospace industry.

Characteristics of Fe-Yttria Composites Fabricated by Powder Metallurgy Method

2012 ◽  
Vol 626 ◽  
pp. 738-742
Author(s):  
M. Marina ◽  
K. Alir ◽  
W. Rahman ◽  
Z. Nooraizedfiza ◽  
Mohd Asri Selamat ◽  
...  
Keyword(s):  
Powder Metallurgy ◽  
Bulk Density ◽  
Metal Matrix ◽  
Powder Metallurgy Method ◽  
Matrix Composites ◽  
Micro Hardness ◽  
Weight Percentage ◽  
Homogenous Distribution ◽  
Hardness Values ◽  
Powder Metallurgy Route

This study is focused on fabricating and characterizing iron (Fe) composites prepared by powder metallurgy route reinforced with varying weight of Yttria (Y2O3). Composites were prepared based on 5 wt. % to 15 wt. % of reinforcement powder with particle size ranging from 1-10µm. Pure Fe matrix composites were also prepared for comparison purpose. This paper will report the microstructure, bulk density and micro hardness values of the composites. Powder characterization and microstructures of the composites were examined using Scanning Electron Microscope (SEM) which indicated homogenous distribution of reinforcement particles in the metal matrix. Bulk density of the composites was calculated using standard Archimedean method showing decreasing values as the weight percentage of Y2O3 increases. Micro-hardness was measured using micro-Vickers hardness instrument. The data obtained shows that the Fe-Y2O3 composites samples possessed superior hardness value with the increasing quantity of reinforcement compared to the unreinforced Fe composite.

Sign in / Sign up

Export Citation Format

Share Document