Abstract
Abstract The paper presents the results of tests on the geometric structure of the surface, hardness and tribological tests of coatings produced by the method of physical vapor deposition (PVD) on the Ti13Nb13Zr alloy. Hardness was determined using MCT3 from Anton Paar, by instrumental indentation. A diamond indenter with Berkovich geometry was used for the measurement.Model tribological tests were carried out in reciprocating motion under conditions of technically dry friction, friction with lubrication of synovial fluid and Ringer’s solution. The counter-sample in the tested friction nodes was a ball of Al2O3 with a diameter of 6 mm. Nanometer hardness measurements showed that as a result of the diamond-like carbon coating (DLC), the hardness increased by an 7-fold. The lowest friction coefficients among all tested friction nodes were obtained for the material combination Ti13Nb13Zr a-C:H - Al2O3 regardless of the conditions of testing. In the case of technically dry friction, the coefficient of friction decreased by 80%, synovial fluid by 70%, and in the case of Ringer’s solution by 88% compared to the results obtained for Ti13Nb13Zr.
Highlights
In recent years there was a significant progress both in the testing and application subject regarding the amorphous carbon
The paper presents the results of tests on the geometric structure of the surface, hardness and tribological tests of coatings produced by the method of physical vapor deposition (PVD) on the Ti13Nb13Zr alloy
The results of nano-hardness measurements showed that as a result of diamond-like coating deposition there was an 80% increase in hardness
Summary
In recent years there was a significant progress both in the testing and application subject regarding the amorphous carbon. The amorphous carbon might be the mixture of the Due to their characteristics, diamond-like coatings are becoming increasingly important in today’s industry. Very good mechanical properties such as high elastic modulus, fracture resistance, chemical stability and low friction coefficient enable their use in various branches of industry. These coatings are used in automotive, aviation, chemical and medical industries [3,4,5,6,7]. The deposited layers are characterized by increasing hardness and resistance to frictional wear. The selection of a anti-wear coating for a specific application requires detailed knowledge of its mechanical and tribological properties. In order to determine the hardness, elastic modulus and adhesion of the coating to the substrate, inden-
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