Friction of Dichalcogenides Tested in a Steam Atmosphere

Material Change in friction when tested in steam 

The other major difference between the various synthetic dichalcogenides lies in their electrical conductivities, as shown in Table 14.1. These figures should be considered relative rather than absolute, since values quoted by different investigators have differed by factors of over two hundred . Overall the lowest resistivity is that of niobium diselenide, and this has led to many investigations of its potential for use in situations, such as high vacuum, where graphite cannot be used. In brush compositions, however, molybdenum disulphide has generally been more successful, and this subject has been considered in more detail in Chapter 12. 

The poor film-forming properties of some of the synthetic dichalcogenides can of course be overcome by incorporation in bonded films, but apart from tungsten 

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Table 14-8 Change in Friction of Dichalcogenides Tested in a Steam Atmosphere (Data from Ref.21)...

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