Method for producing a high adhesion thin film of diamond on a F

Details Method for producing a high adhesion thin film of diamond on a F Method for producing a high adhesion thin film of diamond on a F

1995-09-14

1998-06-02

King, Roy V.

Coating processes

Coating by vapor, gas, or smoke

Carbon or carbide coating

427535, 427560, 427318, 427327, C23C 1626, B05D 300

Patent

active

057596239

ABSTRACT:
A method for depositing a thin film of diamond on the surface of a Fe-based substrate comprises the step of pre-treating the surface of the Fe-based substrate prior to the deposition consisting of nucleating carbon atoms on the Fe-based substrate to grow the thin film of diamond. The pre-treatment consists of supersaturating the surface of the Fe-based substrate with carbon atoms and heating it to form a diffusion barrier layer. During the pre-treatment, at least a portion of the carbon atoms are diffused into the Fe-based substrate. During the deposition process, carbon atoms are prevented by the diffusion barrier layer previously formed to diffuse into the Fe-based substrate whereby these carbon atoms remain available for the nucleation and growth of the thin film of diamond. A portion of the carbon atoms diffused into the Fe-based substrate during the pre-treatment are nucleated during the deposition process and act as anchors to provide a high adhesion between the thin film of diamond and the surface of the Fe-based substrate.

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