Effects of shock compression on powder mixtures of nickel and boron

2019-09-11 19:39:43

The shock powder nickel microscopy

责任者: Kurita, T.;Matsumoto, H.;Sakamoto, K.;Shimada, T.;Osada, T.;Ojima, K.;Abe, H. 单位: Department of Materials Science and Engineering, National Defence Academy, Yokosuka 239-8686, Japan 来源出处: Journal of Alloys and Compounds,2005,396(1-2):133-138 摘要: 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. © 2004 Elsevier B.V. All rights reserved. 关键词: Mixtures;Powder metals;Nickel;Boron;Impedance matching (electric);Intermetallics;Nanostructured materials;X ray diffraction analysis;Optical microscopy;Transmission electron microscopy;Shock compression;Powder mixtures;Powder guns;Flyer plate impact techniques