RESEARCH ACTIVITIES AT THE UNIVERSITÉ DE MONTRÉAL

RESEARCH FIELD

Diamond films synthesis by Micro-Wave assisted Chemical Vapor Deposition  (MWCVD) and  Hot Filament (HFCVD). Development of new surface modification methods for improving adhesion of diamond films to different materials. Development and management of a project for improving surface wear resistance of prosthesis and optic systems.

CHOICE OF DIAMOND

Owing to thermodynamic conditions, diamond usually produced by subjecting graphite to high pressures and temperatures (HPHT). Synthetic diamond resembles natural diamond in most fundamental properties, retaining the extreme hardness, broad transparency, high thermal conductivity, and high electrical resistivity for which diamond is highly prized. Most synthetic diamond is produced as grit or small crystals that are used to provide hard coatings for industrial equipment such as grinding wheels, machine tools, wire-drawing dies, quarrying saws, and mining drills. In addition, diamond films can be grown on various materials by subjecting carbon-containing gas to extreme heat; these layers can be used in cutting tools, windows for optical devices, or substrates for semiconductors.

Figure 1 : Photomicrograph, obtained by Scanning Electron Microscopy (SEM) from the surface of a thin diamond film deposited on pretreated WC-Co substrate, showing the size and orientation of diamond crystals.

Figure 2 : Raman spectra obtained from a diaomnd film deposited on a pretreated WC-Co substrate. .

SOME EQUIPEMENTS

DC glow discharge reactor for material surface modifications and also for deposition.

Micro-wave reactor used for diamond films deposition.

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