Drilling characteristics of stabilized zirconia ceramics by pulsed Nd:YAG laser beams are experimentally discussed, whose power density is about 5×103 W/mm2. Effects of blowing gases of nitrogen, oxygen and air on drilling capability are also discussed. A hole deeper than 15 mm is easily drilled. Aspect ratio of the hole is 17. In this process, blackening of the material around the drilled hole is observed except for the drilling with the oxygen gas. The blackening disappears when the laser beam is bombarded on the blackened area with the oxygen gas. The cause is discussed on the basis of decrease and increase in oxygen content in zirconia.

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© 1995 Laser Institute of America.
1995
Laser Institute of America
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