SELECTION OF TRIBOLOGICAL PLASMA SPRAYED COATINGS USING MULTI-CRITERIA DECISION-MAKING METHODS

  • 1 Pisarenko Institute for Problems of Strength, Nat. Ac. Sci. of Ukraine
  • 2 National Technical University of Ukraine “Igor Sikorsky Kiev Polytechnic Institute
  • 3 State Research Institute, Kiev, Ukraine

Abstract

Decision making methods have been examined within the context of conflicting criteria. Mechanical properties of a number of plasma sprayed coatings based on the modified alumina powder have been given for the purpose of comparative analysis. The modification has been performed by two different methods: 1) by cladding the alumina powder with Ti and Al metal sheaths where the PVD method has been employed; 2) by mechanochemical processing inside planetary ball mill with the titanium oxide nanopowder added. For coating selection, weighed characteristics technique has been used in conjunction with the digital logic and the proposed improved approach to the linear and non-linear data normalization. A conclusion has been made that the most effective, as far as the wear resistance parameter is concerned, are the coatings obtained as a result of the clad alumina powder spraying

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