392
J. Sundaram et al.
Fig. 2 Microstructure of
AA2014/TiB 2 /Al 2 O 3
Table 1 Various densities of sample-I and II
Sample
Green density
g/cc
Sintered density
g/cc
Theoretical
density g/cc
Theoretical
density %
Porosity %
Sample-I
2.731
2.774
2.816
98.5
1.4
Sample-II
2.722
2.735
2.907
94.1
5.9
3.2 Studies on Density
Table 1 reveals the sample-I has a 98.5% higher sintered density compared to the
potential density. Effect of pressure, powder particles are forced together, resulting
in surface defects interlocking and cold welding between the layers [8]. Sample-II
showed a theoretical density of 94.1% sintered relative to sample-I. During sintering,
due to the gas trap, porosity may occur in aluminium alloys. The percentage of
porosity indicates that ceramics with aluminium alloys are properly wetted in both
samples. From the table, sample-I displays 50% porosity of the average porosity; it
is also compliant with the lower volume fraction of the reinforcements having less
porosity than the sample-II.
3.3 Studies on Wear Analysis
Pin-on-disc of load 20 N, sliding distance 1000 m and sliding speed 1.5 m/s analyzed
wear and coefficient of friction properties. It has been inferred from previous research
that the wear rate increases at the sliding distance [9].
J. Sundaram et al.
Fig. 2 Microstructure of
AA2014/TiB 2 /Al 2 O 3
Table 1 Various densities of sample-I and II
Sample
Green density
g/cc
Sintered density
g/cc
Theoretical
density g/cc
Theoretical
density %
Porosity %
Sample-I
2.731
2.774
2.816
98.5
1.4
Sample-II
2.722
2.735
2.907
94.1
5.9
3.2 Studies on Density
Table 1 reveals the sample-I has a 98.5% higher sintered density compared to the
potential density. Effect of pressure, powder particles are forced together, resulting
in surface defects interlocking and cold welding between the layers [8]. Sample-II
showed a theoretical density of 94.1% sintered relative to sample-I. During sintering,
due to the gas trap, porosity may occur in aluminium alloys. The percentage of
porosity indicates that ceramics with aluminium alloys are properly wetted in both
samples. From the table, sample-I displays 50% porosity of the average porosity; it
is also compliant with the lower volume fraction of the reinforcements having less
porosity than the sample-II.
3.3 Studies on Wear Analysis
Pin-on-disc of load 20 N, sliding distance 1000 m and sliding speed 1.5 m/s analyzed
wear and coefficient of friction properties. It has been inferred from previous research
that the wear rate increases at the sliding distance [9].