In
order to meet the demands of the aerospace, automotive and military industries,
the necessity of lightweight and high performance structural materials has provided
the necessary momentum for the development and emergence of Metal-Matrix
Composites (MMCs)
(R.Rosmamuhamadani et al , 2016) .In this century , there
are numerous situations in which chemical intermediates are synthesized
in situ in various processes. This may be done due to the
species is unstable, and cannot be isolated, or simply out of convenience .
This technique will give advantages in form of increasing the matter properties
with the implementation of reinforcement in the matrix . 

 

In-situ fabrication of MMCs is a process, in
which dispersed (reinforcing) phase is formed in the matrix as a result of
precipitation from the melt during its cooling and solidification. In-situ
processes involve the synthesis of composites such that desirable reinforcement,
matrices and interfaces are formed during processing. The successful synthesis
of in-situ composites involves a good understanding of thermodynamics and
reaction kinetics in order to obtain the desirable end product. In situ
techniques have been developed to fabricate Al-based MMCs, which can lead to
better adhesion at the interface and hence better mechanical properties (R.Rosmamuhamadani
et al , 2015)

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Moreover
, the in-situ techniques provides more homogeneous distribution of the
dispersed phase particles and bonding (adhesion) between the particles of
in-situ formed dispersed phase and the matrix is better than in ex-situ MMCs.
Besides, In-situ synthesized particles and fibers are finer reinforcement
particle size, clear interface in comparison the conventional ex-situ
processes.

 

Most
of the demand materials used in industries nowadays are iron , followed by
aluminum due to their characterization needed in conventional application .
Aluminum alloy based discontinuously reinforced metal matrix composites have
emerged as an important class of materials over the past decade, and have seen
significant industrial applications in the aircraft and the automotive industry
(Ganguly et al ,
2001).
Aluminum has low density down to 2.7 g/cc , super malleability , good corrosion
resistances , good thermal conductivity (237 W/mK) , 2.62 x 10-8 ?m
electrical conductivity and good formability . Its young modulus possessed up
to 70 GPa . However , pure Al is demanding but its alloys having a much higher
strength .

In
this research, Al-Cu alloys is selected as a matrix and ZrBr2 as
reinforcement will be use. These alloys will reinforce with in-situ ZrBr2 particles
are synthesized by using salt reaction route. ZrBr2 is introduced
into the alloy by the reaction of the molten alloy with halide salts which
is  K2ZrF6 and KBF4
at 800 °C for 60 minutes. In-situ composites of Al-Cu alloy reinforced
with 1-6 wt.% ZrBr2 are fabricated by salt route. Accordingly, the
present study have been given attention more on mechanical such as tensile and
wear behavior of in-situ Al-Cu/ZrBr2 composite.