If I attempt melt ybco powder in order to make a circuit at what temperature will it begin to chemically break-down? is this feasible?

But at what temperature does it chemically break down? You obviously can't melt diamonds, you just end up with carbon powder, so if I try to melt it is it going to do the same?, perhaps only partially each time, like plastic?

thanks for the help, I'll get the furnace ready.