Titanium diboride-based cermets

After the development of cemented borides with a Fe matrix by Funke et al. [316] and Funke and Yudkovskii [321], this cermet system was recently intensively studied again by Yuriditsky [115], Sigl and Schwetz[116,196], and Jiingling et al. [322,323], and, in connection with an enhanced European research activity, independently by Ottavi et al. [123,124], Ghetta et al. [117], Pastor et al. [324,325], and Sanchez et al. [326]. 

Commercial TiB2 powders are typically produced by the carbothermic reduction of Ti02 with B2O3 or B4C. Both reactions 

Powder Spec. Total O Total C Total N B4C Free C Ti02 B2O3 

TiBj Compatible Compatible Compatible Compatible Compatible 

generally make up the critical impurities in the TiB2 powder. More carbon is introduced to the powder blend when organic binders are added and it should be noted that the oxygen content increases significantly upon milling [118], 

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