Formation of Needlelike Crystallites during Growth of Diamond Films by Chemical Vapor Depositionстатья
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Дата последнего поиска статьи во внешних источниках: 18 июля 2013 г.
Аннотация:Diamond polycrystalline films have been grown by chemical vapor deposition from a hydrogen-methane mixture. The phase composition and structure of the films were studied using Raman spectroscopy, electron microscopy, and thermogravimetry. It is found that, upon heating in air, the oxidation of the carbon material forming the films occurs at significantly different temperatures, depending on the degree of its order and the crystallite size. This difference is used for selective oxidation of the least ordered fine-grained component of the films. The material obtained by this selective oxidation of the films consists of diamond crystallites shaped like regular micrometer-sized tetragonal pyramids with a radius of tip curvature of several nanometers.