`Diamond-coated asphalt tool development`

Tom passes around two physical samples — one with a silicon carbide tip brazed to a steel shank, one with a sintered diamond tip. Used to introduce the productivity-vs-replacement-market argument and to set up the Ashby plot. Production cost of sintered diamond couldn't be justified because silicon carbide gives adequate one-shift performance.

Someone asked me something yesterday at the end of class about diamond, and I was talking about structural materials last time. This is a product. The product goes together like this and there's another half I have in my office. Anybody know what this tool is?