Abstract
The machinable ceramics are used for mechanical and electronic parts. These ceramics consisting of fluor-phlogopite can be machined with tight tolerance using conventional metal cutting equipment and tools. The mechanical properties of these ceramics drops at high temperature. The purpose of this paper is to develop compound machinable ceramics of high strength at higher temperature than the transition temperature of glass and to observe machinability of these ceramics. The sintering of compound machinable ceramics have been carried out on the powder mixture of machinable ceramics and ZrSiO4.The main results obtained were as follows : (1) The compound machinable ceramics showed good mechanical properties at high temperature. (2) The addition of ZrSiO4 powder in the ceramics increased high temperature strength. (3) The higher machinability by turning test was obtained for ceramics with ZrSiO4 amounts ranging from 0 wt% to 40 wt% . (4) The tool life showed a maximum at the cutting speed of 50 m/min.
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