Structure of boundaries in composite materials obtained using explosive loading
We have presented the results of studying the fine structure of interphase boundaries for a number of composite materials obtained by methods of explosive welding and explosive compacting of powder mixtures. Joints of different metals (titanium-low-carbon steel, copper-tantalum) and metals with refractory carbides (chromium carbide-titanium) have been investigated. Under welding, pairs differed from each other by the type of interaction. It has been found that, in these composites, interphase boundaries exhibit a final thickness on the order of 200 nm, throughout which the composition of the material changes gradually from a composition that corresponds to one of the components of the composite to a composition that corresponds to the second component. It has been shown that the structure of interphase boundaries is complex. With the limited solubility of components along boundaries, two fairly thick crystalline interlayers are detected, the total thickness of which is equal to the total thickness of the boundary; between the interlayers, there is a thin (to 5–7 nm in thickness) interlayer with a crystalline or amorphous structure.
Keywordsexplosive welding formation of joint transition zone interphase boundary
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- 1.V. I. Lysak and S. V. Kuz’min, Explosive Welding (Mashinostroenie-1, Moscow, 2005) [in Russian].Google Scholar
- 3.A. V. Krokhalev, V. O. Kharlamov, S. V. Kuz’min, and V. I. Lysak, “Regularities of formation of solid alloys from mixtures of chromium carbide powders with titanium with use of energy of explosion,” Izv. Vuzov. Ser. Poroshk. Metall.Funkts. Pokryt, No. 1, 32–37 (2012).Google Scholar
- 5.Interfaces in Metal Matrix Composites, Ed. by A. G. Metcalfe (Academic, New York, 1974; Mir, Moscow, 1978).Google Scholar
- 6.A. I. Gusev, Nanomaterials, Nanostructures, Nanotechnologies (Fizmatlit, Moscow, 2005) [in Russian].Google Scholar
- 7.V. A. Shabashov, V. V. Ovchinnikov, P. P. Mulyukov, et al., “Determination of the ‘grain-boundary phase’ in submicrocrystalline iron by Mössbauer spectroscopy,” Phys. Met. Metallogr. 85, 327–331 (1998).Google Scholar
- 9.D. V. Shtanskii, “Transparent electron microscopy of high resolution in nanotechnological studies,” Ross. Khim. Zh. (Zh. Ross. Khim. Ob-va im. D. I. Mendeleeva) 46(5), 81–89 (2002).Google Scholar
- 10.B. S. Murty, M. K. Datta, and S. K. Pabi, “Structure and thermal stability of nanocrystalline materials,” Sādhanā. 28, 23–45 (2003).Google Scholar
- 11.P. Keblinski, S. R. Phillpot, D. Wolf, and H. Gleiter, “On the thermodynamic stability of amorphous intergranular films in covalent materials,” J. Eur. Ceram. Soc. 80, 717–732 (1997).Google Scholar
- 16.E. A. Ushanova, E. V. Nesterova, S. N. Petrov, et al., “Development of electron-microscopy specimen preparation for investigations of nanostructured bond zones in dissimilar joints by ion milling,” Vopr. Materialoved. 65(1), 110–117 (2011).Google Scholar