I've read that iridium is used in the impact shielding of radioisotope
thermoelectric generators (RTG) on spacecraft because of its hardness, high
melting point, and extreme corrosion resistance. With stats like that, why
isn't it being used in more applications? I know it is expensive, but so
are many other exotic alloys and composites. It seems that it would be
perfect for numerous aggressive environment applications but is largely
ignored. Any thoughts on other uses/reasons for non-use?
Thanks!
Jim Painter
Materials Science and Engineering
Georgia Institue of Technology
- posted 16 years ago