Cemented carbonitrides

Garbonitrides. Use of carbonitrides in metal cutting tools, both Ti(C,N) coatings (18) and Ni—Mo cemented carbonitrides (19), is expected to increase in the 1990s. 

Chen, L.M., Lengauer, W., Ettmayer, P., Dreyer, K., Daub, H.W., Kassel, D., (2000a), Fundamentals of liquid phase sintering for modem cermets and functionally graded cemented carbonitrides (FGCC) , Int. J. Refract. Met. Hard Mat., 18(6), 307-322. 

Figure 26. Microstructure (SEM image) of a cemented carbonitride (WIDIA TTI 25) showing round hard particles with core-rim type structure.

Figure 31. Microstructures of functional-gradient cemented carbonitrides based on the system (Ti, W)(C, N)-Co which are surface modified by applying a reactive gas phase during sintering in a one step fabrication process [146].

Zirconium carbide, 4 649t, 686 cemented carbides, 4 656 as industrial hard carbide, 4 674 physical properties of, 4 684t preparation, 4 675, 676 stoichiometry, 4 651 Zirconium carbide nitride, 26 627 Zirconium carbonitride... 

Examples of products made by the SHS process include borides, carbides, chalcogenides, hydrides, intermelallic compounds, nitrides, silicides, carbonitrides, sulfides, cemented carbides (cermets), and various heterogeneous mixtures (microcomposiles). 

Carbides and nitrides based on the transition metals of Groups 4 through 6 of the Periodic Table have a number of special physical and mechanical properties that make them attractive for use in engineering applications. This paper discusses these properties and how they are exploited in cemented carbides and carbonitrides used in metalcutting and nonmetalcutting applications. 

Sintered cutting tips or inserts containing c-BN can be brazed to a cemented carbide or other substrates. Brazing bond strength is increased by interlayers of various carbides, nitrides, or carbonitrides [268],... 

Nitrides and carbonitrides in form of powders play some role in hardmetals (cemented carbides). The reader is referred to the article on Carbides of this Encyclopedia (see Carbides Transition Metal Solid-state Chemistry). There, also nitrided hardmetals to form functionally graded hardmetals (FGHM) are discussed. 

Most of the developments in cemented borides aim at the high wear resistance due to the superior hardness compared to carbide-based hard metals. One of the most important applications are, therefore, the cutting tools where cemented boride have to compete with tungsten carbide, titanium carbonitride, and ceramic materials as well. 

Carbonitriding Ferritic nitrocarburizing Diffusion (pyk cementation) chromizing Diffusion (pack cementation) aluminizing Diffusion (pack cementation) siliconizing Boronizing (bonding)... 

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