Physico-Mechanical Properties of Sintered Iron-Silica Sand Nanoparticle Composites: A Preliminary Study

2012 ◽  
Vol 332 ◽  
pp. 7-16 ◽  
Author(s):  
Tahir Ahmad ◽  
Othman Mamat ◽  
Rafiq Ahmad
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Sintering Temperature ◽  
Milling Process ◽  
Silica Sand ◽  
Matrix Composites ◽  
Sintered Iron ◽  
Preliminary Study ◽  
Iron Based ◽  
Nanoparticle Composites

The present study aims to develop silica sand nanoparticles using the ball-milling process and to utilize these nanoparticles as reinforcement for iron-based metal matrix composites. Iron-based metal-matrix composites with 5, 10, 15 and 20wt.% of the processed silica sand nanoparticles were developed using powder metallurgy technique and sintered at 900°C, 1000°C and 1100°C. The results showed that the addition of silica sand nanoparticles to iron as reinforcement decreased the green density, albeit with an improvement in sintered densities. It was also observed that the increase in the sintering temperature results in an improvement of microstructure and microhardness of the composites. The maximum hardness of 168HV in iron-based composites was found with the addition of 20wt.% of silica sand nanoparticles at a 1100°C sintering temperature. It is proposed that the mechanism for the occurrence of this observed increment in microhardness is due to diffusion of silica sand nanoparticles into porous sites of the composites, resulting in the formation of FeSi phase.

Studying the Formation of Fe2SiO4 and Pearlite Phasesin Iron-Silica Sand Nanoparticle Composites

2013 ◽  
Vol 337-338 ◽  
pp. 39-47
Author(s):  
Tahir Ahmad ◽  
Othman Mamat ◽  
Rafiq Ahmad ◽  
Amir N. Malik
Keyword(s):  
Metal Matrix ◽  
Liquid Phase Sintering ◽  
Silica Sand ◽  
Matrix Composites ◽  
Powder Metallurgy Technique ◽  
X Ray Diffraction ◽  
X Ray ◽  
Iron Based ◽  
Nanoparticle Composites ◽  
Scanning Electron

Metal matrix composites have grown rapidly with their usefulness in many applications for industries. The present research aims to study the formation of Fe2SiO4 and pearlite phases, the reaction product of iron-silica sand nanoparticles composites. In this study iron based silica sand nanoparticles composite with 5, 10, 15 and 20wt.% of silica sand nanoparticles were developed using powder metallurgy technique being sintered at 1100°C. It was observed during the X-Ray Diffraction (XRD) and XPS analysis that the reaction between iron and silica sand nanoparticles forms the Fe2SiO4 phase. Field Emission Scanning Electron Microscopy (FESEM) analysis at higher magnification also reveals the formation of pearlite phase. The presence of liquid phase sintering is also observed with frozen liquid spots at microstructure of iron-silica sand nanoparticles reaction.

scholarly journals On the Microstructure, Strength, Fracture, and Tribological Properties of Iron-Based MMCs with Addition of Mixed Carbide Nanoparticulates

Materials ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 2892 ◽  
Author(s):  
Grzegorz Królczyk ◽  
Eugene Feldshtein ◽  
Larisa Dyachkova ◽  
Mariusz Michalski ◽  
Tomasz Baranowski ◽  
...  
Keyword(s):  
Metal Matrix Composites ◽  
Tribological Properties ◽  
Metal Matrix ◽  
Design Method ◽  
Matrix Composites ◽  
Wear Process ◽  
Lattice Design ◽  
Friction Temperature ◽  
Iron Based ◽  
Fracture Features

In this paper, the features of the strength, fractures, and tribological behavior of metal-matrix composites based on the FeGr1 material are discussed. To improve the material properties, a mixture of SiC, Al2O3 and C nanoparticulates have been added to an iron-based matrix. The simplex lattice design method and hardness, compression, and bending tests were used to determine the mechanical properties. Scanning electron microscopy was applied for fracture features analysis. Different fracture types, mainly trans-crystalline quasi-brittle and brittle fracture or inter-granular fracture and microcracks were registered for the composites tested. Depending on the type and amount of ceramic additives, significant changes in strength, as well as in the fracture features of the metal-matrix composites (MMCs), were observed. Based on tribological tests, changes in the momentary coefficients of friction, temperature of the friction surface, and wear rate of the composites with nanoparticulates were described. An analysis of the worn surface morphology revealed changes in the wear process depending on the MMC composition. It was shown that the use of hybrid mixed additives based on hard ceramic nanoparticulates improved both strength and tribological properties of composites.

Characterization and Properties of Iron/Silica-Sand-Nanoparticle Composites

2011 ◽  
Vol 316-317 ◽  
pp. 97-106 ◽  
Author(s):  
Tahir Ahmad ◽  
Othman Mamat
Keyword(s):  
Mechanical Properties ◽  
Electrical Conductivity ◽  
Powder Metallurgy ◽  
Metal Matrix ◽  
Silica Sand ◽  
Particulate Composites ◽  
Powder Metallurgy Technique ◽  
Superior Mechanical Properties ◽  
Iron Based ◽  
Nanoparticle Composites

Metal matrix-particulate composites fabricated by using powder metallurgy possess a higher dislocation density, a small sub-grain size and limited segregation of particles, which, when combined, result in superior mechanical properties. The present study aims to develop iron based silica sand nanoparticles composites with improved mechanical properties. An iron based silica sand nanoparticles composite with 5, 10, 15 and 20 wt.% of nanoparticles silica sand were developed through powder metallurgy technique. It was observed that by addition of silica sand nanoparticles with 20 wt.% increased the hardness up to 95HRB and tensile strength up to 690MPa. Sintered densities and electrical conductivity of the composites were improved with an optimum value of 15 wt.% silica sand nanoparticles. Proposed mechanism is due to diffusion of silica sand nanoparticles into porous sites of the composites.

Self-Lubricating Iron-Based Metal Matrix Composites

2021 ◽  
pp. 41-51
Author(s):  
Shuhaib Mushtaq ◽  
M.F. Wani ◽  
Carsten Gachot ◽  
Mohd Nadeem Bhat
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Matrix Composites ◽  
Iron Based

Development of titanium metal matrix composites reinforced with coated powders

2019 ◽  
Vol 34 (01n03) ◽  
pp. 2040049 ◽  
Author(s):  
Harshpreet Singh ◽  
Tianyi Yu ◽  
Muhammad Hayat ◽  
Syeda Wishal Bokhari ◽  
Zhen He ◽  
...  
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Sintering Temperature ◽  
Matrix Composites ◽  
Titanium Metal ◽  
Coating Technology ◽  
Mechanical And Tribological Properties ◽  
Conventional Press ◽  
Composite Samples

This paper evaluates the feasibility of using SiC and TiC as reinforcement particulates for titanium metal matrix composites (Ti-MMC). The SiC and TiC particles were coated with titanium using a chemical coating technology in order to achieve a homogeneous mixing when they were mixed with pristine Ti. The Ti-MMC with these specially prepared reinforcements were fabricated by a conventional press and sinter route. The effects of sintering temperature in Ti matrix were investigated with respect to phase constituents, microstructure and tribology properties. No in situ phases were observed during sintering and the reinforcement and matrix show sufficient bonding, which acts as a major parameter to enhance hardness and wear resistance compared to pure Ti. All the composite samples had a high sintered density. The hardness of the composites increased with an increase in the sintering temperature. It was also noticed that with the increase in the temperature ranging from [Formula: see text]C to [Formula: see text]C, improvement in the mechanical and tribological properties of the developed titanium matrix composites could be observed. The highest hardness value [Formula: see text] was recorded for Ti-2 wt.% Ti-coated SiC composite when sintered at [Formula: see text]C for 3 h.

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