Block guage and method of marking ceramic material
AssigneeMitutoyo Corporation
InventorsTetsuo Kosuda, Yoshirou Kamata, Kinji Takizawa
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Abstract
A method of making a ceramic material by radiating a laser beam onto the portion of said ceramic material to be marked in a low oxygen atmosphere and a block gauge marked by this marking method. This marking method enables a ceramic material to have a distinct mark. A block gauge composed of a ceramic material has excellent properties such as corrosion resistance.
Claims14
A block gauge comprising a ceramic material of uniform color composed of sintered zirconium oxide as a main ingredient, 3 to 7 wt % of yttrium oxide and 0 to 20 wt % of aluminum oxide, said ceramic material being irradiated by a laser in a low oxygen atmosphere having less oxygen than ambient atmosphere to produce recessed marks on at least one surface of the ceramic material, the recessed marks having a uniform color contrasting with the color of the ceramic material.
A method of marking a ceramic material of uniform color composed of sintered zirconium oxide as a main ingredient, 3 to 7 wt % of yttrium oxide and 0 to 20 wt % of aluminum oxide, comprising the steps of:
- supplying low oxygen atmosphere having less oxygen than ambient atmosphere to a surface of the ceramic material to be marked;
- radiating a laser beam in said low oxygen atmosphere on a portion of said surface to be marked, said laser beam producing a recessed mark having a uniform color contrasting said uniform color of said ceramic material.
Dependencies are inferred from the claim text.