Czasopismo | INŻYNIERIA MATERIAŁOWA | Rocznik 2013 - zeszyt 4

Tribological behaviour of AISI 316L steel after deposition of Ti-Si-C/Ti-B coatings by dual beam IBAD method

nr katalogowy: 79739

Hard, wear-resistant coatings of good toughness, low friction coefficient and good adhesion to substrate are demanded for tribological application, but it is not an easy task to achieve all that properties in a single material. To meet the requirements, two types of coatings structures have been recently developed. Multiphase - composed of two or more phases: (nano-) crystalline and/or amorphous as well as layered - composed of two or more layers of properly selected materials, which sequence and parameters (phase composition, microstructure, thickness) are of vital importance for resulting properties of the whole coating-substrate system. The type and parameters of applied deposition process is crucial factor since it determines the microstructure of the coating, affects the adhesion strength to the substrate and implies the type and distribution of internal stresses built-in the coating [1÷3]. Titanium diboride TiB2 is a hard, high-temperature ceramic material of relatively low density, good electrical and thermal conductivity, good chemical and wear resistance, but brittle. Thin films and coatings of titanium diboride are easily deposited by different methods, but in general are characterized by high residual stress level and poor adhesion to metal substrates therefore, potential applications of single phase, monolayered TiB2 coatings are still strongly limited [4]. To enable the use of this attractive material in the form of a coating there are attempts to combine it with a softer, damage resistant material in multiphase or/and (bi-, multi-) layered structures [5]. A suitable candidate for such application is titanium-silicon carbide Ti3SiC2 . This compound, widely researched as a representant of a novel group of layered ternary carbides (and nitrides), known as MAX phases [6], is relatively soft as a ceramic and characterized by unique combination of properties [6, 7]. The most important features are resistance to thermal[...]

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