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Publikācija: Consolidation of Metallic Hollow Spheres by Electric Sintering

Publication Type Full-text conference paper published in conference proceedings indexed in SCOPUS or WOS database
Funding for basic activity Unknown
Defending: ,
Publication language English (en)
Title in original language Consolidation of Metallic Hollow Spheres by Electric Sintering
Field of research 1. Natural sciences
Sub-field of research 1.3 Physical sciences
Research platform None
Authors Viktors Mironovs
Aleksejs Tatarinovs
Vjačeslavs Lapkovskis
Keywords metallic hollow spheres, electric sintering
Abstract This paper considers peculiarities of the technology of production of structures from metallic hollow spheres (MHS) using magnetic fields and electric sintering. In these studies, the raw material was MHS obtained by burning of polystyrene balls coated by carbon steel. MHS had an outer diameter of 3-5 mm and a steel wall thickness of 70-120 microns. Pulsed current generators were used for electric sintering of MHS to obtain different spatial structures. Since MHS have small strength, the compressive pressure during sintering should be minimal. To improve the adhesion strength and reduce the required energy for sintering, hollow spheres were coated with copper by ion-plasma sputtering in vacuum. The coating thickness was 10-15 microns. The ferromagnetic properties of MHS allowed using of magnet fields for orientation of the spheres in the structures, as well as using of perforated tapes acting as orienting magnetic cores. Ultrasonic testing of MHS structures has been tried using through propagation of ultrasound in low kilohertz frequency range. Sensitivity of the propagation parameters to water filling of inter-spheres space and sintering temperature was demonstrated.
DOI: 10.1088/1757-899X/218/1/012009
Hyperlink: https://iopscience.iop.org/article/10.1088/1757-899X/218/1/012009/meta 
Reference Mironovs, V., Tatarinovs, A., Lapkovskis, V. Consolidation of Metallic Hollow Spheres by Electric Sintering. In: IOP Conference Series: Materials Science and Engineering, Russia, Moscow, 28-31 August, 2016. UK: IOP Publishing, 2017, pp.012009-012009. ISSN 1757-8981. e-ISSN 1757-899X. Available from: doi:10.1088/1757-899X/218/1/012009
Additional information Citation count:
ID 26210