Structure and Properties of Steels and Non-ferrous Metals

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Development (fabrication characterization) of
new Cu nanostructured nanoceramic-Cu
composites.     Heider Yasser Thamir
PhD student Supervised
by Dr. M. J. Kadhim Dr. A.
SH. Jabur    
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SUMMARY AIM OF RESEARCH
During recent years, nanomaterials have received
increasing attention in advanced technology due
to their outstanding mechanical, physical
chemical properties compare with their
corresponding bulk counterparts.
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. These properties are affected by many
parameters such as size, surface area, shape,
chemical composition, morphology structure.
Therefore, detailed studies should be taken place
to investigate new nanostructured
materials. Because of their high electrical
thermal conductivity, copper its alloys have
found widespread applications, such as resistance
welding electrodes, high voltage switches, motor
commutators, continuous casting moulds others.
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The required properties of these products are the
high mechanical properties high electric
thermal conductivity. Also, its often required
that properties remain stable in different
operating conditions, often also that they are
resistant to variant force, current thermal
loads. Some compromise in this regard can be
achieved using precipitation hardened alloys.
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However, a serious drawback of these materials is
instability of their mechanical properties
electric thermal conductivity at elevated high
temperature, resulting from temperature
instability of their microstructure. Therefore, a
rising trend to use new copper-based functional
materials, such as materials dispersion-hardened,
usually by the particles of oxides, carbides
others, obtained by powder metallurgy techniques..
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Within this group of materials particular
attention is being drawn to those of nanometric
size copper matrix grains ceramic particles
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  The aims of this study 1- production
characterization of nanosize copper powders. 2-
study the effect of powder technology parameters
on a- powder technology nanograins copper
products. b- the effect of nanosize ceramic
powder-cu composites by powder technology.
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  Plan of research The study includes 1-
production characterization of nanosize copper
powders. 2- study the ability of controlling the
nanosize copper powders' properties like particle
size, particle size distribution, shape,
morphology, etc. through controlling the
parameters of synthesis method(s).
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3- fabrication characterization of powder
technology products based on nanosize copper
powders. 4- fabrication characterization of
powder technology nanosized ceramic powder-cu
composites.
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The synthesis techniques include 1- chemical
vapor deposition 2- physical vapor deposition 3-
cryogenic ball milling 4- flame spray reactor 5-
hydrolysis 6- two phase approach (reduction
reaction inside block copolymer micelles) 7-
solvothermal, or hydrothermal
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  The characterization includes 1- mechanical
properties such as hardness compression
strength. 2- electrical thermal
conductivity. 3- Structural studies using
optical, scanning transmission microscopes, DTA
DSC. 4- compositional changes using EDS WDS.
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5- Phase analysis using X-ray diffraction X-ray
step scanning.
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The End
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Thank you for your attention