Not really. Knives receive constant wear and abrasion. Coatings will rub off.
There are hard coatings used on some outdoor knives, like Cerakote and similar products.
The "ceramics" put on cars preserve the finish by blocking UV and keeping environmental chemicals off the paint. This keeps the shine longer. They are a liquid polymer with silicon dioxide in it. SiO2 is what glass or sand are composed of.
I get a kick out of the new buzz word - ceramics - it is used on hair products, skin creams, car washes, wood finishes, etc. It evokes the hard fused clay products we grew up with that were very durable. It is not tat type of material.
Clay based ceramics have been around for millennia. It made dishes and pots of the best quality.
About 1900, they started grinding powders from various minerals and other materials and fusing them under high heat and pressure. This started the "new" type of ceramics. We all recognize this type in a spark plug insulator. Then, they started mixing metals in the non-metal base and fusing them and we had a type of material (and knives) called ceramic. It was very hard and wear resistant, but also brittle. This was used in everything from rare earth magnets, to carbide tools to the space shuttle's heat shield. There was a fad knife blade called a "ceramic Knife". It would supposedly out-cut every steel knife. It was also very brittle and chipped easily. That fad wore out pretty fast.
Now they are basically putting a micrometer thin layer of SiO2 on things and calling it "ceramics".
I saw the sales pitch on a "ceramics" product that said i creates "a surface harder than steel". That is true ... Every window in your house, and all the beaches on earth are harder than steel. But at 1 or 2 microns thick, that window breaks pretty easily.
