George, Thats a good suggestion. Unlike the stainless or nickel or tungsten cathodes, the SiC looked like rather than having been corroded or burned away, it was sort of spalled or broken apart. So once mechanical stability is assured, (as with a mill or drill that is hex-SiC coated) some really good performance might be noted.
During the TC sheath runs, the plateau temperature given about 100 watts, and the mass of the couple, ended up between 400 and 450C typically. (Averaged out over LOTS of noise) Very jumpy. Toward the end of the D2O run, I cranked the voltage up to about 75V and as the plasma went to pinkish white, I saw some sporadic momentary jumps up past 850C. I'm sure the actual temperature at the plasma interface was phantastically higher, but the temp as read by the nested couple buried in MgO within the stainless sheath was attenuated. NR --- George Holz <[EMAIL PROTECTED]> wrote: > Hi Nick, > > Perhaps you might find small solid carbide end mills > > or carbide drill bits useful as electrodes. They > need to > have high mechanical strength and appear to have a > very dense > fine crystal structure compared to abrasive cutters. > The drill bits are available in very small > diameters. > > How high a temperature do you read on the enclosed > thermocouple cathodes? > > Regards, > George Holz > Varitronics Systems > > > __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com
