scholarly journals Effect of Sintering Mechanism on the Properties of ZrO2 Reinforced Fe Metal Matrix Nanocomposite

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Pushkar Jha ◽  
Pallav Gupta ◽  
Devendra Kumar ◽  
Om Parkash
Keyword(s):  
Metal Matrix ◽  
Xrd Analysis ◽  
X Ray Diffraction ◽  
High Purity Grade ◽  
Metal Matrix Nanocomposites ◽  
Dense Microstructure ◽  
Metal Matrix Nanocomposite ◽  
Matrix Nanocomposites ◽  
O Phase ◽  
Matrix Nanocomposite

The present paper reports phase, microstructure, and compressive strength of ZrO2 reinforced Fe Metal Matrix Nanocomposites (MMNCs) synthesized by powder metallurgy (P/M) technique. High purity grade iron metal powder was mixed with varying percentage of zirconium dioxide (5–30 wt%), compacted, and sintered in argon atmosphere in the temperature range of 900–1100°C for 1 to 3 hours. X-ray diffraction (XRD) analysis of specimens was done in order to study the phases present and scanning electron microscopy was carried out to determine the morphology and grain size of the various constituents. XRD result shows the presence of Fe, ZrO2, and Zr6Fe3O phase. Zr6Fe3O phase forms due to reactive sintering and is not reported earlier by researchers throughout the globe. SEM results showed the presence of dense microstructure with the presence of Fe, ZrO2, and some nanosize Zr6Fe3O phases.

Electroplated Si3N4 Reinforced Metal Matrix Nanocomposites

2003 ◽  
Author(s):  
Xiaochun Li ◽  
Zhiwei Li
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Metal Matrix ◽  
Volume Fraction ◽  
Energy Dispersive Spectrometer ◽  
Copper Substrate ◽  
Metal Matrix Nanocomposites ◽  
Matrix Nanocomposites ◽  
Matrix Nanocomposite ◽  
Scanning Electron

Permalloy NiFe matrix nanocomposite layers were electroplated on a copper substrate. The volume fraction of nano-sized Si3N4 particles in NiFe matrix was controlled by the addition of various percentages of Si3N4 particles in the NiFe electrolyte. The nanocomposite layers were analyzed by a scanning electron microscopy (SEM). Microhardness test was performed. With nano-sized Si3N4 particles in the NiFe matrix, the microhardness of NiFe was improved. The samples were then annealed at 800 °C for about 20 hours. The microhardness declined more with more Si3N4 particles in the NiFe matrix. The analysis result from Energy Dispersive Spectrometer (EDS) in the SEM showed that the hardness declination could be caused by the segregation of Si3N4 in the NiFe matrix. Finally this paper presents nanocomposite micromolds fabricated by electroplating onto polymer molds that were fabricated by micro-stereolithgraphy.

Study on Mechanical Properties of Al Metal Matrix Nanocomposites Processed Using Ultrasonic Vibration

2009 ◽  
Author(s):  
F. He ◽  
Q. Han ◽  
Y. C. Chen ◽  
C. Xu ◽  
L. Shao
Keyword(s):  
Mechanical Properties ◽  
Ultrasonic Vibration ◽  
Metal Matrix ◽  
Solidification Process ◽  
Nano Particles ◽  
Metal Matrix Nanocomposites ◽  
Weight Percentage ◽  
Sic Particles ◽  
Metal Matrix Nanocomposite ◽  
Matrix Nanocomposites

High intensity ultrasonic vibration was applied to disperse SiC nano-particles into molten A354 during solidification process to fabricate metal matrix nanocomposite (MMNCs). MMNCs: A354/SiC/1p was obtained by dispersing 1% SiC particles into the molten A354. The distribution of the nano-SiC particles in this material was investigated using scanning electron microscope. The mechanical properties of this nano composite were tested. A354/SiC/1p-T6 samples were also fabricated and tested. Mechanical properties of A354/SiC with different weight percentage of SiC particles were also investigated to find out the optimized content of particles. The results suggest that A354/SiC/0.5p-T6 with extra 15 minutes ultrasonic treatment has shown the highest mechanical properties.

Improvement of Tensile Behaviour of Tin Babbitt by Reinforcing with Nano Ilmenite and its Optimisation by using Response Surface Methodology

2017 ◽  
Vol 7 (1) ◽  
pp. 37-51
Author(s):  
M. Vijaya Sekhar Babu ◽  
A. Rama Krishna ◽  
K.N.S. Suman
Keyword(s):  
Tensile Strength ◽  
Response Surface Methodology ◽  
Response Surface ◽  
Metal Matrix ◽  
Processing Parameters ◽  
Tensile Behaviour ◽  
Metal Matrix Nanocomposites ◽  
Casting Technique ◽  
Metal Matrix Nanocomposite ◽  
Matrix Nanocomposite

Metal Matrix Nanocomposites are made from conventional materials and alloys as matrix materials and had become prominent in improving the mechanical behaviour. In this paper, the authors have fabricated a Tin Babbitt particulate metal matrix nanocomposite reinforced with Ilmenite (FeTiO3). For systematic understanding or effect of processing parameters on the tensile behaviour, the central composite design of response surface methodology was used. Metal matrix nanocomposite was fabricated by using ultrasonic assisted stir casting technique. Stirring time, ultrasonic processing time, Wt.% of nanoparticles were taken as processing parameters. The objective of the work is to improve the tensile behaviour of Tin Babbitt and understand the effect of processing parameters on the tensile strength of the Tin Babbitt metal matrix nanocomposite and then optimise it for maximum tensile strength. It was found that tensile strength was improved due to the nano reinforcement.

A REVIEW ON THE FABRICATION TECHNIQUES OF ALUMINIUM MATRIX NANOCOMPOSITES

2015 ◽  
Vol 74 (10) ◽  
Author(s):  
C. D. Marini ◽  
N. Fatchurrohman
Keyword(s):  
Mechanical Properties ◽  
Mass Production ◽  
Metal Matrix ◽  
Aluminium Matrix ◽  
Matrix Composites ◽  
Casting Method ◽  
Metal Matrix Nanocomposites ◽  
Advantages And Disadvantages ◽  
Matrix Nanocomposites ◽  
Matrix Nanocomposite

In recent years, metal matrix composites have been considered as materials that offer better mechanical properties compared to conventional alloys. Recently, the developments of metal matrix nanocomposites (MMNCs) have become more attractive in various applications. However, the synthesis of MMNCs by conventional casting method has shown a limitation due to low wettability of the reinforcement phase by the molten metal. This paper is aimed at reviewing the best result techniques to fabricate the aluminium matrix nanocomposite (AlMNCs). However, each of these techniques has their own advantages and disadvantages. This review concludes powder metallurgy (PM) as the best technique for mass production and cost effectiveness.

Synthesis, mechanical and corrosion behaviour of iron–silicon carbide metal matrix nanocomposites

2017 ◽  
Vol 52 (1) ◽  
pp. 91-107 ◽  
Author(s):  
Piyush Khosla ◽  
Himanshu K Singh ◽  
Vishal Katoch ◽  
Anmol Dubey ◽  
Neera Singh ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Temperature Interval ◽  
Metal Matrix ◽  
Sintering Temperature ◽  
Iron Silicate ◽  
X Ray Diffraction ◽  
Metal Matrix Nanocomposites ◽  
X Ray ◽  
Wear And Corrosion ◽  
Matrix Nanocomposites

The present paper reports the effect of sintering temperature on the properties of Fe–SiC metal matrix nanocomposites (5 wt% SiC; 95 wt% Fe) prepared by powder metallurgy technique. Samples were synthesized by ball milling followed by compaction and then sintering in the temperature interval of 900 – 1100℃ for 3 h, respectively. X-ray diffraction, microstructure, density, hardness, wear and corrosion of prepared samples have been investigated. X-ray diffraction studies show the presence of iron (Fe) and silicon carbide (SiC) along with the presence of iron silicate (Fe3Si) phase. Iron silicate is formed as a result of reactive sintering between iron and silicon carbide particles. Scanning electron microscopy of the samples shows the dispersion of SiC in the whole Fe matrix. Density, hardness, wear and corrosion characteristics of the samples were investigated which varies for different sintering temperature interval. It is expected that the results of this paper will be helpful in developing metal matrix nanocomposites for various industrial applications.

SYNTHESIS OF Cu–Al2O3 METAL MATRIX NANOCOMPOSITE POWDER FROM CuO AND Al POWDERS BY USING HIGH ENERGY PLANETARY FAST MILLING

2009 ◽  
Vol 08 (03) ◽  
pp. 261-266 ◽  
Author(s):  
ASHKAN MOTAMAN ◽  
ESMAEIL SALAHI
Keyword(s):  
Solid Solution ◽  
Metal Matrix ◽  
Xrd Analysis ◽  
Copper Matrix ◽  
High Energy ◽  
Nanocomposite Powder ◽  
Metal Matrix Nanocomposite ◽  
Alumina Particles ◽  
Pure Cu ◽  
Matrix Nanocomposite

Cu–Al2O3 metal matrix nanocomposite powder has been synthesized from CuO and Al powders using high energy planetary fast milling. Mechanical alloying was used to produce 20% Vol. Alumina as a reinforcement phase in copper matrix. Reactive milling between Cu ( Al ) solid solution and CuO powders lead to formation of Cu–Al2O3 metal matrix composite. To obtain Cu ( Al ) solid solution, Cu and Al powders with Cu:Al atomic ratio of six were mechanically alloyed for 50 h. XRD analysis showed that during the reaction of Cu ( Al ) solid solution and CuO , Al solute is extracted from Cu ( Al ) solid solution and reacted with oxygen of CuO to form alumina particles while copper turning back to pure Cu . Presence of alumina particles with sizes smaller than 50 nm was observed in TEM micrographs.

scholarly journals Fabrication and Characterization of the Modified EV31-Based Metal Matrix Nanocomposites

Metals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 125
Author(s):  
Seyed Kiomars Moheimani ◽  
Mehran Dadkhah ◽  
Mohammad Hossein Mosallanejad ◽  
Abdollah Saboori
Keyword(s):  
Thermal Expansion ◽  
Mechanical Strength ◽  
Metal Matrix ◽  
Coefficient Of Thermal Expansion ◽  
Structural Effect ◽  
Metal Matrix Nanocomposites ◽  
Mechanical Stirring ◽  
Specific Strength ◽  
The Matrix ◽  
Matrix Nanocomposites

Metal matrix nanocomposites (MMNCs) with high specific strength have been of interest for numerous researchers. In the current study, Mg matrix nanocomposites reinforced with AlN nanoparticles were produced using the mechanical stirring-assisted casting method. Microstructure, hardness, physical, thermal and electrical properties of the produced composites were characterized in this work. According to the microstructural evaluations, the ceramic nanoparticles were uniformly dispersed within the matrix by applying a mechanical stirring. At higher AlN contents, however, some agglomerates were observed as a consequence of a particle-pushing mechanism during the solidification. Microhardness results showed a slight improvement in the mechanical strength of the nanocomposites following the addition of AlN nanoparticles. Interestingly, nanocomposite samples were featured with higher electrical and thermal conductivities, which can be attributed to the structural effect of nanoparticles within the matrix. Moreover, thermal expansion analysis of the nanocomposites indicated that the presence of nanoparticles lowered the Coefficient of Thermal Expansion (CTE) in the case of nanocomposites. All in all, this combination of properties, including high mechanical strength, thermal and electrical conductivity, together with low CTE, make these new nanocomposites very promising materials for electro packaging applications.

scholarly journals Wettability in Metal Matrix Composites

Metals ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1034
Author(s):  
Massoud Malaki ◽  
Alireza Fadaei Tehrani ◽  
Behzad Niroumand ◽  
Manoj Gupta
Keyword(s):  
Metal Matrix Composites ◽  
Metal Matrix ◽  
Aluminum Matrix ◽  
Interfacial Strength ◽  
High Strength ◽  
Aluminum Matrix Composites ◽  
Matrix Composites ◽  
Metal Matrix Nanocomposites ◽  
Aerospace Applications ◽  
Matrix Nanocomposites

Metal matrix composites (MMCs) have been developed in response to the enormous demand for special industrial materials and structures for automotive and aerospace applications, wherein both high-strength and light weight are simultaneously required. The most common, inexpensive route to fabricate MMCs or metal matrix nanocomposites (MMNCs) is based on casting, wherein reinforcements like nanoceramics, -carbides, -nitrides, elements or carbon allotropes are added to molten metal matrices; however, most of the mentioned reinforcements, especially those with nanosized reinforcing particles, have usually poor wettability with serious drawbacks like particle agglomerations and therefore diminished mechanical strength is almost always expected. Many research efforts have been made to enhance the affinity between the mating surfaces. The aim in this paper is to critically review and comprehensively discuss those approaches/routes commonly employed to boost wetting conditions at reinforcement-matrix interfaces. Particular attention is paid to aluminum matrix composites owing to the interest in lightweight materials and the need to enhance the mechanical properties like strength, wear, or creep resistance. It is believed that effective treatment(s) may enormously affect the wetting and interfacial strength.

Sign in / Sign up

Export Citation Format

Share Document