Studies Of Influence on Multiwalled Carbon Nanotubes (MWCNT’s) Reinforced… 3.2 Hardness Test
ROCKWELL HARDNESS C SCALE (HRC)
100 90 80 70 60 50 40 HRC 30 20 10 0
73.66
75
80
87.66 81.66 83.66
90
91.66
58
Graph.1 : % age of MultiWalled Carbon NanoTube Graph-1 shows that as the percentage of multiwalled carbon tube increases, the hardness also increases. 3.3 Compression test The specimen was prepared according to the ASTM standard ASTM695. Each sample was a round solid cylinder with dimensions of length 40mm and diameter 15.5mm. The Load v/s Deflection and Stress v/s Strain graphs were obtained and hence Young’s Modulus was determined for each of the samples. The bar graph of Young’s moduli versus samples containing certain weight percentages of MWCNT’s is as shown below. Young’s modulus v\s MWCNT% 450 400 350 302.1
300 YOUNG’S MODULUS (E) MPa
250
222
320
336.6
351.66 360.5
390.68
399.8
248
200 150 100 50 0 EPOXY 0.25
0.5
0.75
1
1.25
1.5
1.75
2
Graph.2: Variation of Young’s modulus for different %age of MWCNT
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| Vol. 4 | Iss. 1 | Jan. 2014 |60|