Method for producing carbon allotrope

DETAILED DESCRIPTION To accomplish this object, the method for the production of carbon allotrope contemplated by this invention comprises continuously supplying fine carbon powder onto a substrate, irradiating the fine carbon powder with a laser beam of a high output level thereby inducing sublimation of the fine carbon powder, and quenching the sublimated fine carbon powder to cause deposition of the product of the quenching on the substrate.
Thus, in the present invention, the fine carbon powder is instantaneously sublimated by exposure to the laser beam of a high output level and the sublimated fine carbon powder is deposited in the form of carbon allotrope on the substrate when the irradiation of the fine carbon powder with the laser beam is discontinued and the fine carbon powder is consequently quenched.
The method of this invention permits the deposited allotrope to form a coating film of a relatively large thickness on the order of 100 .
mu.
m when the amount of the fine carbon powder supplied and the duration of the exposure of the fine carbon powder to the laser beam are properly adjusted.
This coating film exhibits fast adhesiveness to the substrate.
The other objects and characteristic features of this invention will become apparent from the detailed description to be made below with reference to the annexed drawings.