Effects of shock compression on powder mixtures of nickel and boron
T. Kurita., H. Matsumoto, K. Sakamoto, T. Shimada, T. Osada, K. Ojima, Hiroshi ABE
Department of Materials Science and Engineering, National Defense Academy, 1-10-20 Hashirimizu, Yokosuka 239-8686
Journal of Alloys and Compounds 396 (2005) 133.
Abstract
A shock recovery experiment for mixing nickel and boron powder was performed by a flyer plate impact technique. The flyer velocity was in the range of 0.7.1.4 km s.1, and the shock pressure was calculated to be 4.11 GPa by the impedance matching method. The shock-treated sample was characterized by X-ray diffraction analysis, optical microscopy and transmission electron microscopy. The shock wave induces a reaction between the nickel and boron powder particle. The amount of the shock-synthesized intermetallic compounds is increased with increasing shock pressure. At a shock pressure of 11 GPa, a bubble-like structure is formed by the interaction between the powder particles. Transmission electron microscopy analysis reveals the presence of nano-scale nickel particles in the recovered samples. The shock compression proved useful for the formation of unique microstructures. c 2004 Elsevier B.V. All rights reserved.
Keywords: Shock compression; Powder mixture; Powder gun; Nano particle; Strain
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