GRANULES OF A BRITTLE MATERIAL FOR VACUUM GRANULE INJECTION AT ROOM TEMPERATURE, AND METHOD FOR FORMING A COATING FILM USING SAME

摘要

The present invention relates to granules of a brittle material for vacuum granule injection at room temperature, and to a method for forming a coating film using same. Particularly, particulates having a size of 0.1 to 6 µm are granulated and a coating film may be formed through vacuum granule injection at room temperature using the granules. The granules of the brittle material according to exemplary embodiments may be used through the vacuum granule injection at room temperature and a coating process may be continuously performed. Since the granules injected through a nozzle have a relatively large mass and thus have a large amount of kinetic energy, the coating film may be formed at a low gas-flow rate, and the forming rate of the coating film may be increased. Therefore, the granules may be useful for forming a ceramic coating film. In addition, a coating film having a porosity of 10% or less and having a uniform and fine structure that does have non-uniformities such as cracks, large pores, or a lamellar structure may be formed using the method for forming the coating film according to the exemplary embodiments.