«Фараби Әлемі» атты студенттер мен жас ғалымдардың халықаралық конференциясы
жүктеу/скачать 0,93 Mb. Pdf көрінісі
|
| DIAMOND LIKE CARBON COATINGS
Samatkyzy D. Scientific adviser: d.ch.sc., professor Mun G.A. Kazakh National University Al-Farabi dina_95s@list.ru In several different phases carbon manifests itself such asgraphite, nanotubes, fullerenes,diamond and diamond-like carbon etc. Due to its ability to hybridize in several forms such aslinear coordinations (sp 1 ), trigonal (sp 2 )and tetrahedral (sp 3 ). Diamond-like carbon (DLC) is an important form of amorphous carbon consisting of a mixture of both sp 3 and sp 2 coordinated carbon. Diamond-like carbon (DLC) has been subjected intense research effort over the last three decades. This material was successfully fabricated using ion beam deposition. Owing to the presence of high fraction of sp 3 bondings, DLC exhibits numerous attractive properties that closely resemble those of diamond, such as high mechanical hardness, stiffness, wear resistance, chemical inertness and optical transparency, and low coefficient of friction. This moment we know three main methods for modifying amorphous carbon coatings: – process parameter variations during coating, – additional elements in the coating (doping), – coating architecture, variation of properties in layered coating stacks. The methods described to modify the coating properties: ion implantation,thermal annealing andphysicochemical active post treatment can also be controlled andcombined to tailor the coating properties. Nowadays tribological and mechanical properties of DLC coatings are of outstanding interest for industrial applications. As a result of these properties they could be used in metallurgical, biomedical and aeronautical applications.Some specific applications include protective coatings for heart valves, inject printer cartridges, prostheses, magnetic discs and other tribological related applications. жүктеу/скачать 0,93 Mb. Достарыңызбен бөлісу:
|