scholarly journals Development, Testing and Characterization of Al NanoTiCp Composites through Powder Metallurgy Techniques

2021 ◽  
Vol 5 (8) ◽  
pp. 224
Author(s):  
Gaurav Bajpai ◽  
Anuradha Tiwari ◽  
Rajesh Purohit ◽  
Vijay Panchore ◽  
Rashmi Dwivedi ◽  
...  
Keyword(s):  
Powder Metallurgy ◽  
Matrix Composites ◽  
Micro Hardness ◽  
Compaction Process ◽  
Sem Images ◽  
Nano Composite ◽  
Industrial Sectors ◽  
Isostatic Compaction ◽  
Indirect Tensile

In the present scenario, weight diminution and strength enrichment are the main requirements for escalating the application of a nano composite material in different sectors. Several industrial sectors, such as automobile, defense and aerospace, are making various components of nano composites with the help of powder metallurgy processing. In this study, Al nanoTiCp composites (2, 4 and 6 wt %) were contrived through modified powder metallurgy (PM) techniques with the help of Cold Isostatic Compaction process (CIP). The mechanical properties such as density, porosity, micro-hardness, compressive strength and indirect tensile strength were increasing with the reinforcement of nanoTiCp particles up to 4 wt % in Al metal matrix composites. Nevertheless, clustering of nanoTiCp particles were found at 6 wt %, which is also observed in SEM images.

scholarly journals Design, Development and Characterization of Graphene Sand Nano-Composite for Water Filtration

2020 ◽  
Vol 63 (2) ◽  
pp. 118-122
Author(s):  
Shahid Hussain Abro ◽  
Alidad Chandio ◽  
Iftikhar A. Channa ◽  
Abdulaziz S. Alaboodi
Keyword(s):  
Design Development ◽  
Visible Spectroscopy ◽  
Sem Images ◽  
River Sand ◽  
Nano Composite ◽  
Ftir Characterization ◽  
Global Issue ◽  
Scientific Approach ◽  
Uv Visible

  Water purification and filtration is a global issue and many researchers are engaged to resolve this problem by adopting the scientific approach, graphene sand composite was prepared through bio- synthesized technique. River sand was used in this context to remove the impurities already present in the sand 0.1M nitric acid treated the sand and the product was powder black in colour, referred as GSC, graphene sand composite. SEM, XRD and FTIR characterization was used to analyze the results. SEM images showed nano sized layers or sheets of graphene extending outwards.The XRD peak represents the multi lagered graphene structure which is formed by the treatment of the composite with acid and application of the high temperature during experiment UV-visible spectroscopy results successfully reveals the filtration difference between mud water and filtered water.  

Preparation and Characterization of Chitosan/Silver Nano-composite and its Application on Nile Water as Antibacterial Materials

MRS Advances ◽  
2020 ◽  
Vol 5 (26) ◽  
pp. 1331-1338
Author(s):  
Heba Elfaig ◽  
Wala Elsayed ◽  
Hasabo Ahmed
Keyword(s):  
Silver Nanoparticles ◽  
Chitosan Nanoparticles ◽  
Water Disinfection ◽  
Coliform Bacteria ◽  
Sem Images ◽  
Nano Composite ◽  
Complete Inactivation ◽  
Nile Water ◽  
Antibacterial Material

Abstract:The prepared silver/chitosan nanocomposite and chitosan nanoparticles in this study may demonstrate the potential in optimizing the minimum amount required to achieve complete inactivation of various Coliform bacteria in Nile water. Chitosan nanoparticles were prepared based on the ionic gelation of the prepared chitosan and silver nanoparticles were reduced by Solenostemma Argel extract. Finally, chitosan silver-loaded nanoparticles were prepared by dispersing silver nanoparticles onto the chitosan nanoparticles. The SEM images exhibited a diameter range of 10 nm–30 nm for both of the fabricated silver nanoparticles and chitosan nanoparticles. The UV-Vis analysis confirmed the formation of Ag nanoparticles by the appearance of the characteristic peak at 410 nm. The antibacterial activity of chitosan nanoparticles and silver-loaded nanoparticles was evaluated against the Coliform bacteria. Results show an improvement in the inhibition of the growth of various bacteria tested when silver nanoparticles were introduced which was (0.03g/100ml). Consequently, chitosan silver-loaded nanoparticles could be recommended as an efficient antibacterial material for water disinfection.

scholarly journals Physical and Mechanical Characterization of Titica Vine (Heteropsis flexuosa) Incorporated Epoxy Matrix Composites

Polymers ◽  
2021 ◽  
Vol 13 (23) ◽  
pp. 4079
Author(s):  
Juliana dos Santos Carneiro da Cunha ◽  
Lucio Fabio Cassiano Nascimento ◽  
Fernanda Santos da Luz ◽  
Sergio Neves Monteiro ◽  
Maurício Ferrapontoff Lemos ◽  
...  
Keyword(s):  
Sodium Carbonate ◽  
Volume Fraction ◽  
Fracture Mechanisms ◽  
Matrix Composites ◽  
Sem Images ◽  
Chemical Treatments ◽  
Impact Tests ◽  
Izod Impact ◽  
First Time

Titica vine (Heteropsis flexuosa) is a typical plant of the Amazon region commonly used for making baskets, bags, brooms and furniture, owing to its stiff fibers. In spite of its interesting properties, there is so far no reported information regarding the use of titica vine fibers (TVFs) in engineering composite materials. In this work, the TVF and its epoxy composites were for the first time physically, thermally and mechanically characterized. Additionally, the effect of two kinds of chemical treatments, one with sodium carbonate and one with calcium lignosulfonate, as well as different volume fractions, 10, 20, 30 and 40 vol%, of TVF-reinforced composites were assessed for corresponding basic properties. The thermogravimetric results of the composites reveal enhanced thermal stability for higher TVF content. In addition, the composite incorporated with 40 vol% of TVFs treated with sodium carbonate absorbed 19% more water than the composites with untreated fibers. By contrast, the calcium lignosulfonate treatment decreased water absorption by 8%. The Charpy and Izod impact tests showed that the composites, incorporated with the highest investigated volume fraction (40 vol%) of TVF, significantly increased the absorbed energy by 18% and 28%, respectively, compared to neat epoxy. ANOVA and Tukey statistical analyses displayed no direct influence of the chemical treatments on the energy absorption of the composites for either impact tests. SEM images revealed the main fracture mechanisms responsible for the performance of TVF composites.

scholarly journals In Situ Formation of ZrB2 and Its Influence on Wear and Mechanical Properties of ADC12 Alloy Mixed Matrix Composites

Materials ◽  
2021 ◽  
Vol 14 (9) ◽  
pp. 2141
Author(s):  
Lalta Prasad ◽  
Niteesh Kumar ◽  
Anshul Yadav ◽  
Anil Kumar ◽  
Virendra Kumar ◽  
...  
Keyword(s):  
Xrd Analysis ◽  
Inorganic Salts ◽  
Dry Sliding ◽  
Matrix Composites ◽  
Mixed Matrix ◽  
Sem Images ◽  
Mechanical And Tribological Properties ◽  
In Situ Formation

In this work, aluminium alloy ADC12 reinforced with various amounts of ZrB2 (0 wt.%, 3 wt.%, 6 wt.%, 9 wt.%) were synthesized by an in-situ reaction of molten aluminium with inorganic salts K2ZrF6 & KBF4. XRD, EDAX, and SEM techniques are used for the characterization of the fabricated composite. XRD analysis revealed the successful in situ formation of ZrB2 in the composite. From the SEM images, it was concluded that the distribution of reinforcement was homogeneous in the composites. A study of mechanical and tribological properties under the dry sliding condition of ZrB2-reinforced ADC12 alloy has also been carried out. It is seen that there is an increase in tensile strength by 18.8%, hardness by 64.2%, and an increase in wear resistance of the material after reinforcement. The ductility of the material decreased considerably with an increase in the amount of reinforcement. The composite’s impact strength decreased by 27.7% because of the addition of hard ZrB2 particulates.

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.

Structural Characterization of Powder Metallurgy and Composite Materials

1973 ◽  
Vol 31 ◽  
pp. 180-181
Author(s):  
Alan Lawley
Keyword(s):  
Powder Metallurgy ◽  
Primary Objective ◽  
Matrix Composites ◽  
Structure Property ◽  
Quantitative Characterization ◽  
Rational Development ◽  
Structural Applications ◽  
Structure Property Relationship

Of the broad spectrum of new or advanced competitive engineering materials for structural applications, composites and high-density powder metallurgy (P/M) materials are perhaps of most interest. Rational development necessitates a thorough knowledge of the associated structure-property relationship; particular importance is vested in the role of microstructure on properties such as strength, creep resistance, ductility, toughness and fatigue resistance. Examination of structure in these materials presents a number of unique problems; however, intelligent application of the various techniques of optical and electron microscopy can provide a quantitative characterization. The primary objective here is to review these approaches and to illustrate observations by reference to metal-matrix composites and various P/M materials.

Characterization of mechanically alloyed Fe based and MoNiAl+Al2O3 reinforced composites

2021 ◽  
Vol 63 (4) ◽  
pp. 368-372
Author(s):  
S. Osman Yilmaz ◽  
Tanju Teker ◽  
Hüseyincan Eker
Keyword(s):  
High Volume ◽  
Matrix Composites ◽  
Reinforced Composites ◽  
Micro Hardness ◽  
X Ray Diffraction ◽  
Mechanically Alloyed ◽  
Surface Mapping ◽  
X Ray ◽  
Composite Samples

Abstract Fe-MoNiAl-Al2O3 powders were mechanically alloyed by a SPEX type attritor. The Fe based composite samples were reinforced with complex mechanically alloyed Fe-MoNiAl-Al2O3 particles in different ratios and Fe matrix composites were obtained. Scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD), elemental surface mapping and microhardness tests were used to analyze the microstructures of the composites. The sintered composites showed that thin Al2O3 particles were dispersed. High volume fractions of the reinforcement having nanometer dimensions were produced in metallic matrices. Additionally, as the content of Al2O3 increased, the micro-hardness increased, which indicates that fine Al2O3 particles had a reinforcing effect.

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