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Advanced Materials Research QiR 12 by Bondan Tiara Sofyan

By Bondan Tiara Sofyan

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Table 2: The Ballistic testing with NIJ type of calibre. 62 Velocity [m/s] 265 ± 15 380 ± 15 715 ± 15 Distance [m] 5 5 15 Bondan Tiara Sofyan 29 Results and Discussion The Interface Condition. Alloying of the matrix was conducted to improve its mechanical properties and the quality of the cast metal. The increase of Cu content strengthened and hardened the aluminium alloy although this process decreased its castability. Adding Mg content improved and increased wettability on the interface area between the matrix and the steel wire [15].

1a,b. 1. The SiC particles coated was rough topography and differences of morphology as indicated that metal oxide layer on SiC surface was formed. This phenomenon is illustrated by thin and light spheres in Fig. 1c. This thin layer of metal oxide on SiC surface was containing of SiO2 and MgAl2O4 analysed by XRD as shown in Fig. 2 for all Mg content. (a) (b) (c) Figure 1 : Morfology of SiC particles (a,b) as received and (c) SiC coated It is possible that particle size of SiC coated are different from SiC as received, but it is not significant due to formation of metal oxide layer on SiC surface is very thin.

Elsadig, Ballistic Performance of Coconut Shell Powder/Twaron Fabric Against Non-Armor Piercing Projectiles, Defense Science Journal, vol. 58, no. 2, pp. 248-263, (2008). [7] W. Paul, I. Jan and V. Ignaas, Natural Fibers: Can They Replace Glass in Fiber Reinforced Plastics? Composite Science and Technology, vol. 63, pp. 1259-1264, (2003). M. M. S. R. Arora, Tensile and Flexural Strengths of Coconut Spathe-Fiber Reinforced Epoxy Composite, Journal of Tropical Agriculture, vol. 43, no. 1-2, pp 63-65, (2005).

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