Titanium diffusion coatings on austenitic steel obtained by the pack cementation method

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ID: 50413
2009
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Abstract
The surface of specimens made of 316L austenitic steel was modified by titanium diffusion. The diffusion coatings were obtained by packing in a powder mixture consisting of titanium powder, NH4Cl and Al2O3 powder. The procedure required high temperatures, over 900 °C, and long durations. Atomic titanium was formed in the muffle during the process. Titanium atoms from the metallic part surfaces diffuse towards the interior and a diffusion layer is formed as a function of the steel composition. Titanium diffusion into the surface of 316L austenitic steel determines the formation of a complex coating: a thin layer of TiN at the exterior and a layer consisting of compounds containing Ti, Ni and Fe in the interior of the coating. The obtained coatings were continuous, adherent and had a hardness higher than that of the substrate material. The diffusion coatings were investigated by optical and electron microscopy, X-ray diffraction and Vickers microhardness tests.
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Authors BRITCHI, MIRELA;ENE, NICULAE;OLTEANU, MIRCEA;RADOVICI, CONSTANTIN;
Journal journal of the serbian chemical society
Year 2009
DOI
DOI not found
URL
http://www.shd.org.rs/JSCS/Vol74/No2/11_4090_3823.pdf
Keywords
chemistry Materials of engineering and construction. Mechanics of materials Engineering (General). Civil engineering (General) Technology Science (General) Mechanical engineering and machinery Science

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