| PSZ, Al2O3, TiO2를 반응소결하여 제조한 쾌삭(快削) 세라믹스 |
| 박정현, 정동식, 이원재, 김일수 |
| 동의대학교 융합부품공학과 |
| Machinable Ceramics Made by the Reaction Sintering of PSZ, Al2O3 and TiO2 |
| Jeong Hyun Park, Dong Sik Jung, Won Jae Lee, Il Soo Kim |
| Department of Materials and Components Engineering, Dongeui University |
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| ABSTRACT |
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Machinability is important in engineering applications, especially in the current micro-electronics industry. Most ceramic components have complex shapes and hence require machining generally with diamond tools, which incurs a high production cost. Recently, h-BN-containing machinable ceramics have been developed, but these materials are very expensive due to the high raw materials and production costs. Therefore, the development of low-cost machinable ceramics is necessary. In this study, inexpensive $Al_2TiO_5$ was studied as a replacement for h-BN. $Al_2O_3$, $TiO_2$ and partially stabilized $ZrO_2$(PSZ) powders were mixed with various mole ratios and were sintered at $1500^{circ}C$ for 1 h. The density, hardness and strength were then measured. The phase analysis and microstructures were observed by XRD and SEM, respectively. The machinability of each specimen was tested by micro-hole machining. The results of this research showed that the produced composites could be used as low-cost machinable ceramics. |
| Key words:
PSZ, $Al_2TiO_5$, Machinable ceramics, Reaction sintering |
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