Laser barrier material and method of laser drilling
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United States of America Patent
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-
Sep 17, 1991
Grant Date -
N/A
app pub date -
Sep 14, 1990
filing date -
Sep 16, 1989
priority date (Note) -
Expired
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Abstract
PTFE-loaded wax is used in the laser drilling of holes in hollow turbine blades to prevent strike-through of the beam to an opposite wall of a cavity in the blade. The PTFE-loaded wax is poured or injected in molten form into the cavity prior to laser-drilling, and is subsequently removed by steaming.
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