| Autor: |
Brik, V., Kadyrov, V., Larikov, L., Khairutdinov, A. |
| Zdroj: |
Soviet Powder Metallurgy & Metal Ceramics; 1987, Vol. 26 Issue 10, p829-833, 5p |
| Abstrakt: |
The results of x-ray diffraction analysis indicate a complex multiphase composition of the areas adjoining the zone of contact of the coating with the base related to occurrence of the α → γ and γ → α-structural transformations. Mutual mixing of the materials of the coating and base in the liquid phase leads to alloying and stabilization of the high temperature modification of iron (γ-Fe) and cobalt (Β-Co). The structural transformation (γ → α-Fe) has a significant influence on the processes of formation of detonation coatings of powders of pure metals (Co-Ni) applied on iron and leads to a reduction in the level of mechanical properties of the joint. In the coating itself significant mixing of the sprayed metals occurs including different mechanisms of mass transfer such as mass transfer in the liquid and solid phases [1] with a depth of penetration of more than 10 Μm. On the boundary of the joint of the coating with the iron base relatively weak diffusion interaction of the contacting metals is observed. The width of this zone (5-10 Μm) is significantly less than that in spraying of a Co-Ni coating on an aluminum base [1]. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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