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The XPS method has been used to study the chemical composition of the surface of sand forms based on magnesium oxide. The original and modified forms were investigated. Modification of the form was carried out by plasma deposition of a titanium coating on the inner surface. The surface of the initial form consists of the initial oxides and intermetallic compounds based on the elements of the form. In the surface layers of the modified form, TiO2 is the main titanium-containing compound, silicon titanates and intermetallic compounds based on the elements of the form and titanium are present.

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