Chemical Vapor Deposition of Tin on Iron or Carburized Iron

Abstract

An experimental investigation of the chemical vapor deposition of tin on iron and carburized iron substrates is presented, using stannous chloride vapor as the source of tin, in an inert or reducing atmosphere. At temperatures between 450° and 750°C, the mechanism of vapor coating is the displacement reaction in an inert or reducing atmosphere, but in a reducing atmosphere, reduction reactions also occur. The coating consists of iron‐tin compounds or iron‐tin carbides, the structure of which is obtained by diffusion and thus influenced by the time and temperature of deposition. The relations between nuclei formed at the beginning of the deposition and the substrate show that these nuclei may have an epitaxial growth. Epitaxial relationships between the nuclei and the iron substrate are given.