GENERAL PROPERTIES OF INTERSTITIAL NITRIDES

This chapter is a review of the properties and general characteristics of the interstitial nitrides formed by the metals of Group IV (titanium, zirconium, and hafiiium) and Group V (vanadiiun, niobium, and tantalum). As mentioned in Ch. 10, these six nitrides are the only refiactory transition-metal nitrides. Th have similar properties and characteristics and, of the six, titanium nitride has the greatest importance from an application standpoint. 

These nitrides are produced mostly in the form of coatings or powders. The febrication processes and the applications for each nitride are summarized in Secs. 6-11 and reviewed in more detail in Chs. 14,15, and 16. 

In this section and the next three, the properties of the interstitial nitrides of Group IV and V arc examined and compared with those of the 

The properties of interstitial nitrides have not been studied as extensively as those of the interstitial carbides and many gaps remain, particularly in determining the effects of composition and impurities, the thermodynamic functions, and the mechanical properties. 

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