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Ballistic Testing of Small 3D‐Printed Alumina Disks with the Energy Method

2017; Wiley; Linguagem: Inglês

10.1002/9781119321682.ch4

1940-6339

E.P. Carton, Jaap Weerheijm,

Ion-surface interactions and analysis

This chapter examines a confinement for alumina based ceramic tiles with a diameter of 30 mm using the energy method. The energy-method is based on measurement of (kinetic) energy of the core of an AP-projectile before and after interaction with the target. This requires the mass and velocity of the core to be known before and after its interaction. The velocities are generally measured in a ballistic range, while the residual core mass is measured after being caught using a soft recovery system. The difference in kinetic energy provides the energy loss of the AP-core. The 3D-printed Alumina samples had the same shape and dimensions as the disk shaped samples of the commercially available alumina. This allows a direct comparison between the two alumina types. Stereolithography is based on a chemical reaction, specifically a polymerization reaction initiated by absorption of photons of appropriated wavelength, typically in the UV range. Each photon absorbed creates a radical active center. The energy method has been applied to a commercially available armor grade alumina and a new alumina material that was produced by sintering a 3D-printed green form. The armor grade alumina (Corbit 98) was tested both as a large bare tile and as a small tapered disk. The energy method shows a small variation between shots. Combined these techniques enable the ballistic evaluation of new ceramic samples when only available in small sizes and small numbers.