ENGINEERING THE SURFACE WITH BORON BASED MATERIALS
Authors: Dearnley, P. A.; Bell, T.
Source: Surface Engineering, Volume 1, Number 3, 1985 , pp. 203-217(15)
Publisher: Maney Publishing
Abstract:Boron, boron carbide, boron nitride, and transition metal borides have many attractive properties, including high melting point and hardness, good wear and corrosion resistance, excellent electrical conductivity, and resistance to attack by molten metals. There therefore appears to be significant scope for enhancing surface properties of metals and ceramics by applying coatings constituted from these materials. Currently, the only commercial coating processes practised have been the thermochemical diffusion techniques termed boronizing or boriding, whereby boron is diffused into, and combines with, the substrate material forming a single or double phase metal boride layer at, and adjacent to, the surface. This review not only describes the various media used for such treatments and their limitations, but attention is also given to the lesser known processes, not yet commercially practised, which provide for the deposition of a wide variety of boron based materials. Such processes, like PVD and CVD, appear to hold great potential for the future. The wear, corrosion, and oxidation properties of boron based coatings are described and specific applications are cited.
Document Type: Research Article
Publication date: 1985-01-01
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