Sorry, just saw your post. The contact point to the part under test is part of a longer, pivoting bar of stainless steel. It's all one piece from the fulcrum to the tip, connected to the other end is some 316L 22AWG wire. Where the "bar" or probe connects to the wire and the contact point to...
The Ag coating looks promising but time will tell. I used an extra probe and sanded back the scale. Then I applied some Ag paste (which I'll likely need to thin out with additional solvent) to two points. After firing there is no significant resistance between the two Ag coated areas but I am...
It's funny you mention that. I've used some TIG electrodes as contacts before for a different test, that was in a 400º tube furnace and under nitrogen. As it stands right now I'm looking for a quick and inexpensive solution. I'm certain I could use Au or Pt wire along the probe and make...
Cleaning the contacts after each cycle would be ideal but given the location in the chamber it would be very difficult and may also lead to someone breaking some of the smaller pieces of alumina. This test is also intended to be used by a broad group of people as a QC check and, given some of...
Is there type of fairly inexpensive and durable material that could be used that would hold up these conditions? As a last resort the tip of the contact could be ground down and capped w/ Pt. Thanks again.
I'm seeking some advice since this is completely out of my realm of experience. Here's a quick background and then I'll get right to the problem. Working on a test fixture for measuring materials from RT to 700ºC. The fixture inside a small furnace is made from 316L and alumina, the alumina...
