Machinability of Ceramic Materials

The pronounced connection between the fracture toughness of the material to be machined and the attainable material removal rate can be explained by the described mechanisms of material removal and the related surface formation. Materials with a low resistance to cracks are characterized by the 

Material removal rate and shape-generating counterpart wear in relation to fracture toughness of the ceramic to be machined. (From Konig, W., Vortragsband zur VDI-Fachtagung Neue Werkstoffe erfordern neue Bearbeitungsverfahren, Diisseldorf, Germany, 1988.) 

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Kirchner, H.P. and Conway, J.C., 1985, Mechanisms of material removal and damage penetration during single point grinding of ceramics. Machining of Ceramic Materials and Components, ASME, New York, Vol. 17, pp. 53-61. 

Spur, G., Stark, C., and Tio, T.H., 1985, Grinding of non-oxide ceramics using diamond grinding wheels. Machining of Ceramic Materials and Components, Sub-ramanian, K. and Komanduri, R., Eds., PED-Vol. 17, ASME, p. 33. 

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... 

A number of applications of power ultrasound are to be found in heavy industry both in metalworking and processing [17]. The machining of modem materials requires tools that can deal with unusual properties, complex shapes of work-pieces, and accuracy in working. Basic ultrasonic machining processes become of importance when dealing with carbides, stainless steels, ceramics and glass. Four main types of application are of industrial relevance ... 

C. Tsutsumi, K. Okano, T. Suto High quality machining of ceramics. Journal of Materials Processing Technology 37 (1993), p. 639. 

Machining of CSI materials using both Si3N4-based ceramic and CBN tools is optimal in terms of energy consumption, especially for medium and rough machining operations. 

Boettger, J.M., Ker, M.K., Shore, P., and Stephenson, D.J., Influence of ductile mode grinding on the strength of silicon based ceramics. Proceedings of the International Conference on Machining of Advanced Materials, NIST Special Publication 847,1993, pp. 353-358. 

Suzuki, K., Uematsu, T., Yanase, T., and Nakagawa, T., "On-Machine Electrodischarge Truing for Metal Bond Diamond Grinding Wheels for Ceramics," Proceedings of the International Conference on Machining of Advanced Materials, NIST 847, July 1993, pp. 83-88. 

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