Ceramic cutting tools

Other ceramic cutting-tool materials include alumina, Si-Al-0-N, alumina-carbide composites and, more recently, a composite of silicon nitride reinforced with silicon carbide whiskers. This last material can be produced by chemical-vapor infiltration (CVI) and has high strength and toughness as shown in Table 18.3.Cl 

Selected Properties of Commercial Ceramic Cutting Tools 

Kennmetal designation K060 NGK designation NTK-HC2 Greenleaf designation WG-300 GTE Valenite designation Quantum 6 

These ceramics are usually coated by CVD with an appreciable increase in performance as shown in Fig. 18.1. A major use of these coated ceramics is in the machining of hard materials such as cast iron and superalloys.1 1 

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When you write on a blackboard with chalk, you are not unduly inconvenienced if 3 pieces in 10 break while you are using it but if 1 in 2 broke, you might seek an alternative supplier. So the failure probability, Pf, of 0.3 is acceptable (just barely). If the component were a ceramic cutting tool, a failure probability of 1 in 100 (Pf= 10 ) might be acceptable, because a tool is easily replaced. But if it were the window of a vacuum system, the failure of which can cause injury, one might aim for a Pf of lO and for a ceramic protective tile on the re-entry vehicle of a space shuttle, when one failure in any one of 10,000 tiles could be fatal, you might calculate that a Pf of 10 was needed. 

CEMENTED TUNGSTEN CARBIDES by Go pal S. Upadhyaya CERAMIC CUTTING TOOLS edited by E. Dow Whitney... 

Wayne, S. F., andBuljan, S. T., The Role of Thermal Shock on Wear Resistance of Selected Ceramic Cutting Tool Materials, Ceram. Eng. Sci. Proc., 9(9-10) 1395-1408 (1988)... 

Germany Oxide-ceramic cutting tools (chisels). 

Miao H, Qi, L, Cui G (1995) Silicon Nitride Ceramic Cutting-Tools and their Applications. In Low IM, Li XS (eds) Advanced Ceramic Tools for Machining Application - II Key Engineering Materials 114, Trans Tech Publications Ltd, Switzerland, p 135... 

Brandt G (2001) Ceramic Cutting Tools. In Heinrich JG, Aldinger F (eds) Ceramic Materials and Components for Engines. Wiley-VCH, Weinheim, p 21... 

E. Dow Whitney, ed., Ceramic Cutting Tools, Noyes Publications, Park Ridge, N.J., 1994. 

In spite of its developing state, dynamic fracture must be dealt with in designing ceramic structural components, such as heat engine components, ceramic armor and ceramic cutting tools. Shattering, which is characteristic of a... 

Significant recent changes in the market shares of the different kinds of cutting ceramics shown in Table 1 should be noted. There has been an increase in the use of ceramic cutting tools, attributed to increasing use of silicon nitride tools. 

Table 3. Thermal conductivity of ceramic cutting tool materials.

G. Brandt, Development of ceramic cutting tools , Materiaux < Techniques, 85, 1997, 3-12. 

The ternary B-C-Ti system was intensively studied by Rudy et al. [99] and has been considered for the fabrication of ceramic cutting tools [100-103], The most recent critical assessment was published by Duschanek et al. [104, 105] who, in contrast to the previous authors, take the re-established Ti3B4 phase into account. No ternary phases have been discovered. The ternary solid solubility of the particular binary compounds except TiCogiBo n is generally less than 1 at.-%. TiB2 coexists with... 

Ceramic Cutting Tools, Fig. 3 Structure of (a) 100 % P-Sialon, (b) a/P Sialon, (c) 100 % a Sialon, and (d) Sialon with electrical conductivity (Sialon-SiC-TiN composite)... 

Ceramic Cutting Tools, Fig. 5 (a) Structure of alumina-TiCN composite, (b) schematic of crack deflection by a hard particle, and (c) crack deflection in alumina matrix by TiC particle (35)... 

Ceramic Cutting Tools, Fig. 9 Relative chemical resistance of various tool materials, mostly against Fe or Co based alloys... 

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