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.

Tribological behavior of AA7075-TiC composites by powder metallurgy

2018 ◽  
Vol 70 (6) ◽  
pp. 1066-1071 ◽  
Author(s):  
Saravanan C. ◽  
Subramanian K. ◽  
Anandakrishnan V. ◽  
Sathish S.
Keyword(s):  
Powder Metallurgy ◽  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Tribological Behavior ◽  
Wear Behavior ◽  
Process Condition ◽  
Wear Test ◽  
Matrix Composites ◽  
Content Type ◽  
Weight Percentage

Purpose Aluminium is the most preferred material in engineering structural components because of its excellent properties. Furthermore, the properties of aluminium may be enhanced through metal matrix composites and an in-depth investigation on the evolved properties is needed in view of metallurgical, mechanical and tribological aspects. The purpose of this study is to explore the effect of TiC addition on the tribological behavior of aluminium composites. Design/methodology/approach Aluminium metal matrix composites at different weight percentage of titanium carbide were produced through powder metallurgy. Produced composites were subjected to sliding wear test under dry condition through Taguchi’s L9 orthogonal design. Findings Optimal process condition to achieve the minimum wear rate was identified though the main effect plot. Sliding velocity was identified as the most dominating factor in the wear resistance. Practical implications The production of components with improved properties is promoted efficiently and economically by synthesizing the composite via powder metallurgy. Originality/value Though the investigations on the wear behavior of aluminium composites are analyzed, reinforcement types and the mode of fabrication have their significance in the metallurgical and mechanical properties. Thus, the produced component needs an in-detail study on the property evolution.

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.

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.

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