Measurement of density

Twelve
numbers of samples have been prepared for measurement of density. The
parameters required to measure the density parameters are diameter (d) and
length (l) that have been measured three times in each of the twelve samples by
digital Vernier caliper. Mean diameter (D_m) and mean length L_m
of each sample are measured in order to obtain more accurate data. The volume of each sample is also calculated
from mean diameter (D_m) and mean length (L_m). Composite
samples are weighted by digital weighing machine and mean mass (M_m)
is calculated by mass (m). Value has been taken for three times for each sample
of twelve different composites. Densities
(β) of each sample under individual composite have been calculated by volume
(V) and mean mass (Mm) of every sample.Formulae that have been used in this
present investigation are given below:

D_m = (d₁+d₂+d₃)/3
(mm)

Lm = (l₁+l₂+l₃)/3 (mm)

V = [л/4d_m²X l_m] (mm³)

M_m = [m₁+m₂+m₃]/3
gm

Density
of sample β = M_m/V gm/mm³

The
green density and sintered densities have been measured by using the above
formulae and discussed in this section. The theoretical density of the samples
was calculated. The theoretical density (ρ_th) of graphite /Al composite was determined
by using the following equation: