Ligand-Excess Yttrium Complex with a Promiscuous Ligand as a Precursor for Surface Yttrium-Alloying of Parts from Heat-Resistant Alloys

Abstract

It is proposed that the potassium salt of nitrilo-tris-methylenephosphonate coordination complex with yttrium K₈[YH{N(CH₂PO₃)₃}₂] · 15H₂O be used as a precursor of Y-containing adsorbed layers for yttrium surface alloying via thermal or other energy impacts on a surface layer. The complex contains two crystallographically and functionally inequivalent ligand molecules. Due to the structure of the complex, the free donor centers of one of the ligand molecules are able to bond nonselectively with the metal surface and form a uniform adsorption layer even on the phase-inhomogeneous surface.