This invention relates to a CVD-modified
coating, its preparation method, and its application, belonging to the field of
coating technology. The preparation method includes the following steps: obtaining a CVD
coating using
chemical vapor deposition; subjecting the CVD coating to freeze-
drying to obtain a first CVD coating; subjecting the first CVD coating to
magnetic field heat treatment to obtain a second CVD coating; and sequentially alternatingly
processing the second CVD coating with the freeze-
drying and
magnetic field heat treatments to obtain the CVD-modified coating. Based on existing CVD coating preparation methods, this invention utilizes a combined
magnetic field heat treatment and freeze-
drying process for synergistic modification, optimizing the
microstructure of the CVD coating. When applied to a
substrate surface, it can improve its
hardness and
wear resistance, thereby extending the service life of devices such as
cutting tools, molds, and
machine parts, and has a wide range of applications.