X-ray microanalysis and properties of multicomponent plasma-borided layers on steels
Krzysztof Sikorski , Slawomir T Wierzchon , P. Bieliński
AbstractThe structure and chemical composition of composite and multicomponent borided layers obtained by a new method that combines the chemical electroless and plasma boriding techniques are described. Quantitative X-ray microanalysis examinations show that on the surface of nickel–phosphorus coated steel borided at 923 K three boride phases of the type (Ni x Fe1 − x )4B3, (Ni x Fe1 − x )2B and (Fe x Ni1 − x )B formed, whereas in the samples borided at 1123 K only two borides (Fe1 − x Ni x )B and (Fe1 − x Ni x )2B are present. The shape and the distribution of the phases depends on the thickness of the Ni–P layer deposited on the steel substrate before boriding. The thicknesses of boride zones obtained on nickel coated steels are much greater than those obtained on the same steel without nickel coating. Also the diffusion zone between the Ni–P layer and the steel increases during boriding, which improves the adhesion of the layer to the substrate. The composite layers obtained show a high wear resistance, with their resistance to corrosion being markedly greater than that of uncoated and only borided steel.
|Journal series||Journal of Materials Science, ISSN 0022-2461, 1573-4803|
|Keywords in English||Characterization and Evaluation Materials, Industrial Chemistry/Chemical Engineering, Mechanics, Polymer Sciences|
|Citation count*||27 (2015-04-29)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.