I have never sharpened a carbide knife blade but have sharpened/modified plenty of carbide cutting tools. For ceramic knives when stones chip the edge I use diamond loaded strops. It seems to me that for such “chippy” blades you need to reduce the point pressure on the apex, and the only way to do this is with a softer “bond”. This is the only way I could avoid chipping with a black Kyocera knife I have, all other stones would leave micro chipping no matter what I did. I then tried leather with diamonds and no chipping at all looking at the apex with a microscope.
