This week I got to do a really fun job at work. Fun at work for me is a relative thing. Whatever it is it needs to be challenging and new and hopefully a little bit weird. The repair job I did for a materials researcher fits the bill to a teacup.
Platinum crucible. The body is drawn from a single piece of platinum and ended up approx .030 (.75mm) thick. The circular disc that will make up the bottom is a little thicker at around a 1mm. The two coils of wire are the filler rod for welding the two together. Our materials group has the ability to recycle the material and make it into whatever form we require. Sheet, plate, rod and wire. Huge presses and wire drawing stands are right at their fingertips for just this kind of work.
The back story on the crucible is that it had been used to melt and fuse special glass compounds for research into energy efficient windows. The compounds being melted are hot enough to cause hot shorting in the platinum and failure in the original joint. Our materials department rolled a special higher temp alloy to use for the bottom of the crucible in the hope it will work better for this hot glass melting application.