scholarly journals CHARACTERIZATION OF AL-GRAPHITE COMPOSITE DEVELOPED BY POWDER METALLURGY TECHNIQUE

2015 ◽  
Vol 04 (10) ◽  
pp. 119-121
Author(s):  
Aravind Appanna K E .
Keyword(s):  
Powder Metallurgy ◽  
Powder Metallurgy Technique ◽  
Graphite Composite

Fabrication and Characterization of Different Ca Content in Mg-Ca Composite Using Powder Metallurgy Technique

2015 ◽  
Vol 819 ◽  
pp. 309-313 ◽  
Author(s):  
M.S. Syaza Nabilla ◽  
C.D. Zuraidawani ◽  
M.N. Derman
Keyword(s):  
Powder Metallurgy ◽  
Morphological Analysis ◽  
Calcium Content ◽  
Optical Microscope ◽  
Powder Metallurgy Technique ◽  
Weight Percentage ◽  
Fabrication And Characterization ◽  
Strength Improvement ◽  
Xrd Method

Magnesium (Mg) has a great potential to be used in various field of work since it is lightweight and has low density properties. However, its application is limited due to its poor properties for Mg has a relatively low strength. Improvement is made by mixing Mg with calcium (Ca) as composite element for it is lightweight and non-toxic. In this research, Mg is prepared with different weight percentage (0, 0.5, 1, 1.5, 2 wt. %) of Ca with pure Mg as reference prepared by powder metallurgy (PM) method to study the mechanical properties. Morphological analysis carried out by optical microscope shows increase grain refinement with the increase of calcium content in Mg-Ca composites. The phase transition upon addition of Ca is determined using XRD method detects formation of Mg2Ca. Range from 1.78 g/cm3to 1.83 g/cm3, the density of each sample composite increase. While porosity profiles show inverse characteristics upon addition of Ca. Microhardness strengths also intensifies up to 193.20 MPa as more Ca content added in.

Characterization of Mg/MgO Nanocomposites Synthesized Using Powder Metallurgy Technique

Materials ◽  
2005 ◽  
Author(s):  
C. S. Goh ◽  
J. Wei ◽  
M. Gupta
Keyword(s):  
Mechanical Properties ◽  
Powder Metallurgy ◽  
Volume Fraction ◽  
Physical And Mechanical Properties ◽  
Thermomechanical Analysis ◽  
Powder Metallurgy Technique ◽  
Magnesium Matrix ◽  
Individual Particles ◽  
Threshold Amount

Magnesium nanocomposites with 0.1, 0.2, 0.3 and 0.4 volume percentages of MgO were synthesized using the powder metallurgy technique. The nanocomposite billets obtained were subsequently hot extruded at a temperature of 350 °C with an extrusion ratio of 20.25:1. The extruded nanocomposites were characterized for their microstructural, physical and mechanical properties. The microstructures of the nanocomposites showed individual particles of MgO uniformly distributed in the magnesium matrix. The thermomechanical analysis results revealed that a more thermally stable magnesium nanocomposite could be obtained with a threshold amount of MgO. The tensile properties results indicated that the yield strength peaks at 0.3 vol.% of reinforcement incorporated, with an improvement of approximately 17%. An attempt is made to correlate the volume fraction of the MgO with the resultant physical and mechanical properties of the magnesium nanocomposites.

scholarly journals Mechanical and physical characterization of hydroxyapatite/alumina biocomposites produced by the powder metallurgy route for biomedical applications

2021 ◽  
Vol 26 (4) ◽  
Author(s):  
Mayara Ribeiro Masseli ◽  
Bruna Horta Bastos Kuffner ◽  
Lucas Victor Benjamim Vasconcelos ◽  
Gilbert Silva ◽  
Daniela Sachs
Keyword(s):  
Mechanical Properties ◽  
Powder Metallurgy ◽  
Mechanical Strength ◽  
Ball Mill ◽  
Biomedical Applications ◽  
Bone Repair ◽  
Powder Metallurgy Technique ◽  
Precursor Powders ◽  
Powder Metallurgy Route

ABSTRACT The hydroxyapatite calcium phosphate based ceramic (Hap) is widely used for bone repair, as it is a biocompatible biomaterial and because it has osteoconductive and osteoinductive properties. However, the low mechanical strength of Hap may limit its applicability. Thus, the present work aims to improve the mechanical properties of Hap, associating it with alumina (Al2O3), using the powder metallurgy technique, which consists in the milling of the precursor powders in a planetary ball mill, uniaxial pressing and sintering. The microstructure and mechanical strength of the sintered samples were evaluated using density, microhardness, compressive strength and wettability tests. It was concluded that the use of Al2O3 in the composite improves the mechanical properties of Hap, while decreases its hydrophilic potential. Thus, the composition with 40% Hap / 60% Al2O3 was considered the best for biomedical applications.

scholarly journals Fabrication of Copper-Graphite MMCs Using Powder Metallurgy Technique

2018 ◽  
Vol 24 (10) ◽  
pp. 49 ◽  
Author(s):  
Mohamed Khazal Hussein ◽  
Walaa W. Jameel ◽  
Noor Fadhil Athraa Sabah
Keyword(s):  
Powder Metallurgy ◽  
Wear Test ◽  
Copper Matrix ◽  
Processing Parameters ◽  
Inert Atmosphere ◽  
Powder Metallurgy Technique ◽  
Graphite Composite ◽  
The Matrix ◽  
Bearing Materials ◽  
Pure Cu

Copper, and its, alloys and composites (being the matrix), are broadly used in the electronic as well as bearing materials due to the excellent thermal and electrical conductivities it has. In this study, powder metallurgy technique was used for the production of copper graphite composite with three volume perc ent of graphite.  Processing parameters selected is (900) °C sintering temperature and (90) minutes holding time for samples that were heated in an inert atmosphere (argon gas). Wear test results showed a pronounced improvement in wear resistance as the percent of graphite increased which acts as solid lubricant (where wear rate was decreased by about 88% as compared with pure Cu). Microhardness and compressive strength increased (about 8% and 16%, for each of them) and reached to the maximum values at 1% graphite percentage as compared with pure Cu, then it decreased after that critical graphite concentration. Microstructure test indicated that the dark region in the copper matrix was increased as the percent of graphite increased and the reinforcement particles were homogeneously distributed which means that the powder metallurgy technique is suitable for such task.  

Development and Characterization of AZ31B Mg Alloy Using Powder Metallurgy Technique Followed by Hot Extrusion

2014 ◽  
Vol 984-985 ◽  
pp. 124-128 ◽  
Author(s):  
R. Anish ◽  
M.S. Pragash ◽  
G. Robert Singh
Keyword(s):  
Powder Metallurgy ◽  
Hot Extrusion ◽  
Sem Analysis ◽  
Mg Alloy ◽  
Powder Metallurgy Technique ◽  
Micro Hardness ◽  
X Ray Diffraction ◽  
X Ray ◽  
Powder Metallurgy Route

In this study AZ31B Mg alloy is developed by powder metallurgy route followed by hot extrusion. The extruded materials were characterized for microstructure, X-ray diffraction (XRD), density, porosity and mechanical properties such as tensile, compression, impact and micro hardness. The SEM analysis of fractured surface of AZ31B Mg alloy showed quasi-cleavage fracture mode.

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