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ACTIVATED
DIFFUSITION SATURATION IN VACUUM

The technologies and equipment for depositing multi-functional sheetings on basis of silicides, borides, carbides, nitrides and oxides of various metals, and also combined protective layers are developed in NSC KIPT. The coatings can be applied toon products from refractory metals and alloys, graphite and carbon - carbon composite materials, alloyed and notalloyed steels, cast irons and heat resisting alloys.

The method is characterized by opportunity of coatings reception for various
PURPOSES:
  • anticorrosive, proof for aggressive gases (oxygen, water steam, products of burning etc.);
  • chemically proof (in alkaline and acid environments);
  • resisting for metal melting (for example Al, Cu);
  • heat-resisting (up to 2000oC);
  • strengthening (the hardness of the tool raises 2-10 time);
  • antifrictional (coefficient of friction: 0,02... 0,07);
  • antireflecting;
  • antiemissive etc.
ADVANTAGES OF THE METHOD

Introduction of dosed quantity of activators (on a basis galogeneds of metals) and (or) liquid phase of environments) in a vacuum working zone is the difference of the method from widely known diffusitive methods. This provides the method with the following advantages:
  • opportunity of reception of clean surfaces;
  • high speed of formation of coatings - 10... 100 mcm/hour;
  • temperature of saturation can be reduced for 300oó in comparison with the not-activated saturation (800oC...1300oC);
  • opportunity of reception of coatings by thickness up to 1000 microns;
  • high uniformity of coating thickness on difficult configuration products, including on the products having a groove or latent cavities;
  • high diffusitive durability of adhesion of coatings with a substrate (at a level of the basic metal durability);
  • ecological cleanliness and wasteless manufacture.
The following works can be executed by the NSC KIPT experts:

  • drawing coatings on skilled and serial sets of products with the sizes corresponding to cilinders with diameter 330 mm and length 600 mm;
  • development of technology, designing and manufacturing of the technological equipment with start it at the enterprise of the customer and training of the personnel;
  • warranty service and repair of the equipment.
Created by Inna Zalivadna