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Item Thermal Stability of Hafnium Diboride Films, Obtained on Substrates of Steel 12X18H9T and Cutting Plate T15K6(Sumy State University, 2012) Agulov, A.V.; Goncharov, A.A.; Goncharova, S.A.; Bazhin, A.I.; Stupak, V.A.; Petukhov, V.V.Investigation results of the influence of high-temperature annealing in the air environment on the phase structure and structure of hafnium diboride films, received on substrates from steel 12Х18Н9Т and cutting plate Т15К6 are presented. It is shown that in the course of annealing on a surface of HfВ2 film the oxide layer of HfО2, with monoclinic structure is formed. Thus, annealing temperature increase from 600 to 1000 С leads to increase in thickness of an oxide layer from 100 to 600 nanometers and to formation of a multilayered covering of HfB2 - HfO2. On substrates of steel 12Х18Н9Т the coating is destructed at the temperature higher on 800 C than for Т15К6. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/34923Item Superhardness Effect of the Films of Transition Metals Diborides(Sumy State University, 2012) Goncharov, A.A.In this work the data of superhardness effect of thin film coatings based on diborides transition metals are presented. The results of substructural characteristics of the synthesized films are discussed. The structure, physicomechanical characteristics of the films are investigated. The formation mechanism sp2 and sp3 chemical bonds are described. The measurements of the hardness and the elasticity module of the coating are conducted. When you are citing the document, use the following link http://essuir.sumdu.edu.ua/handle/123456789/34906