National Research Council of Canada. Security and Disruptive Technologies
National Research Council of Canada. National Institute for Nanotechnology
National Research Council of Canada. Aerospace
Text, Book Chapter
39th International Conference on Advanced Ceramics and Composites, January 25–30, 2015, Daytona Beach, Florida
multi-walled carbon nanotube; alumina fiber reinforcement; electron microscopy; alumina composite
Alumina has been widely used for personal armour plate due to its relatively low cost, acceptable hardness and fracture toughness. With the increasing threat level, a much improved ceramic material with better ballistic performance and lighter weight is required. This paper is presents a research work, where alumina reinforced with 2D and 3D alumina fiber mats has been successfully developed for evaluation. The 2D alumina fiber reinforced alumina composite consists of an alumina matrix reinforced with 18 vol% of alumina fiber mats. And the 3D fiber reinforced alumina composite is made with alumina matrix with a 2D alumina fiber mats along with multi-walled carbon nanotubes vertically grown onto the fiber mats. In this study, a detailed examination on fracture surfaces of both 2D and 3D reinforced composites is conducted with scanning electron microscopy to elucidate the contribution of multi-walled carbon nanotubes and alumina fibers in enhancing the fracture toughness of the alumina matrix. Transmission electron microscopy investigation is also conducted on the composite with the 3D reinforcement to provide information on the morphological features at the fiber/matrix regions.
Advances in Ceramic Armor XI: A Collection of Papers Presented at the 39th International Conference on Advanced Ceramics and Composites: 137–145.