Biomedical Engineering Reference
In-Depth Information
Table 6.3 Physical and mechanical properties of MMNCs compared with
monolithic metal
Properties of MMNCs compared to
monolithic metal matrix
Forming method
Reference
Disintegrated melt
deposition + hot
extrusion
UTS and work of fracture of MMNCs
increased by 17% and 156% respectively
Hardness decreased by 17%
Paramsothy
et al
.
(2011a, 2011b)
Ball mill + hot
pressing
Elastic modulus of MMNCs increased by
8.5%
Nouri
et al
. (2012)
Ball mill + plasma
spray forming
Elastic modulus increased by 78%
Laha
et al
. (2009)
Electroless copper
deposition +
spark plasma
sintering
Yield strength higher
Young's modulus two times higher
Daoush
et al
.
(2009)
In-situ
produced
particle + cold
pressing
Improved compression strength,
hardness and wear resistance
Fathy
et al
. (2011)
Disintegrated melt
deposition + hot
extrusion
Improved hardness, yield strength, UTS,
elastic modulus, and ductility
Hassan
et al
.
(2008)
Mechanical
milling + hot
pressing
Improved hardness and wear resistance Hosseini
et al
.
(2010)
Mechanical
mixing + hot
pressing + hot
extrusion
1 vol.%Si
3
N
4
/Al has comparable tensile
strength to that of the 15 vol.%SiCp/Al
composite, and higher yield strength and
ductility
Ma et al. (1996)
Ultrasonic-aided
casting
Yield strength increased by 51%, UTS
increased by 14%, ductility decreased by
18%
Cao et al. (2008a)
Ball milling + BP-
ECAP (back
pressure, equal-
channel angular
pressing)
Compressive yield strength increased
from 50 MPa to 260 MPa with adding
5% C
Goussous
et al
.
(2009)
Co-deposition +
hot pressing
Microhardness increased from 86 to 89.9
HV. Electricity conductivity increased
from 86.5% IACS to 134.6% IACS
He
et al
. (2008)
are inferior to predicted values. The major reason for this is that, although
nanosized reinforcement is predicted to greatly improve the properties of
MMNCs, controlling other process parameters can be very challenging, yet
extremely important. For instance, the porosity ratio is an important factor
that affects the properties of the final product. Also, the porosity ratio is
affected by the consolidation approach. Hot isostatic pressing, hot
extrusion, equal channel angular pressing, or laser sintering will make a
difference to the density of bulk material, which eventually affects the
mechanical properties of MMNCs. The dislocation is strongly influenced by
