when a highly nonreactive (and expensive) metal that does not form an oxide layer is wrung together it welds. the question now is in a vacuum will it still need to be wrung? AVE's channel: https://www.youtube.com/user/arduinoversusevil recommended AVE viewing: Gauge blocks; https://www.youtube.com/watch?v=gbsd2OpPOMw&t=3s Cold welding of gold; https://www.youtube.com/watch?v=mHAhfX7iRjs vacuum welding device: https://www.youtube.com/watch?v=4za2nBPJo7s&t=1s Help me make videos by donating here: