Abstract
It has been revealed that replacing a rough copper powder with a nanopowder increases the acoustic emission (AE) upon sintering the pressings of the W + 20% Cu structure. Hydrogen sintering of the W + 20% Ag structure is accompanied by an elevated level of acoustic emission when compared to vacuum. At the same time, the frequency spectra of hydrogen and vacuum processes are similar. For the binary powder systems with an infusible base, the AE after the crystallization of a fusible component has been explained by the relaxation of the internal mechanical stresses which emerge in the material upon cooling.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
O. V. Gusev, Acoustic Emission on Deformation of Single Crystals of Refractory Metals (Nauka, Moscow, 1982) [in Russian].
V. L. Greshnikov and Yu. B. Drobot, Acoustic Emission: Application for Testing Materials and Products (Izd. Standartov, Moscow, 1976) [in Russian].
V. A. Zelenskii, A. B. Ankudinov, A. G. Penkin, A. I. Chernov, and M. I. Alymov, “Acoustic Emission in the Process of Liquid-Phase Sintering of Binary System W + 20% Cu Nanopowder,” Fiz. Khim. Obrab. Mater., No. 3, 79–83 (2010).
O. N. Leont’eva, M. I. Alymov, and O. A. Teplov, “Heterophase Synthesis of Ultradisperse Iron-Copper Powders,” Fiz. Khim. Obrab. Mater., No. 5, 105–109 (1996).
V. A. Zelenskii, M. I. Alymov, A. B. Ankudinov, and I. V. Tregubova, “Low-Temperature Hydrogen Reduction of Copper Powders,” Perspekt. Mater., No. 6, 83–87 (2009).
S. S. Gorelik, Yu. A. Skakov, and L. N. Rastorguev, X-Ray Diffraction and Electron-Optical Analysis (Moscow Institute of Steel and Alloys, Moscow, 1994) [in Russian].
N. P. Lyakishev and M. I. Alymov, Preparation and Physical-Mechanical Properties of Bulk Materials (ELIZ, Moscow, 2007) [in Russian].
N. P. Lyakishev, B. A. Kalin, and M. I. Alymov, Physical Materials Science: Module 3. Amorphous and Nanocrystalline Alloys. Stabilization of the Structural Phase State (Moscow Engineering Physics Institute, Moscow, 2006) [in Russian].
Author information
Authors and Affiliations
Corresponding author
Additional information
Original Russian Text © V.A. Zelenskii, A.B. Ankudinov, A.G. Penkin, M.I. Alymov, 2011, published in Rossiiskie Nanotekhnologii, 2011, Vol. 6, Nos. 7–8.
Rights and permissions
About this article
Cite this article
Zelenskii, V.A., Ankudinov, A.B., Penkin, A.G. et al. Effect that powder dispersity and sintering medium have on acoustic-emission activity. Nanotechnol Russia 6, 483 (2011). https://doi.org/10.1134/S1995078011040161
Received:
Accepted:
Published:
DOI: https://doi.org/10.1134/S1995078011040161