公开(公告)号：US20180142338A1

公开(公告)日：2018-05-24

申请号：US15568445

申请日：2016-03-23

Applicant: TOCALO CO., LTD.

Inventor： Hiroki YOKOTA ,  Daisuke KAWAI ,  Tatsuo SUIDZU

IPC: C23C4/02 ,  B23K26/352 ,  C23C4/134

CPC classification number: C23C4/02 ,  B23K26/00 ,  B23K26/352 ,  C23C4/134 ,  C23C8/02 ,  C23C8/10 ,  C23C8/80 ,  C23C28/04

Abstract: A ceramic substrate is irradiated in an atmospheric air with a laser having a power density of 1.0×107-1.0×109 W/cm2 for an action time on an irradiation area of 1.0×10−7-1.0×10−5 s to roughen a surface of the ceramic substrate, as well as to form an oxide layer on a roughened surface. A thermal sprayed coating formed on the ceramic substrate sufficiently adheres to the ceramic substrate via the oxide layer.

公开(公告)号：US20220281033A1

公开(公告)日：2022-09-08

申请号：US17637790

申请日：2020-08-20

Applicant: TOCALO CO., LTD.

Inventor： Hiroki YOKOTA ,  Daisuke KAWAI

IPC: B23K26/352 ,  B23K26/0622 ,  C23C4/18

Abstract: A surface treatment method is for processing a surface of a substrate. The method includes irradiating a surface having unevenness with a laser beam satisfying all of the three following requirements: a power density in a range with a radius of 25 μm from a center of a laser beam spot is 1.0×103 to 1.0×105 kW/cm2; a power density of an entire laser beam spot is 0.08 to 0.12 times the power density in the range with the radius of 25 μm from the center of the laser beam spot; and an action time in the range with the radius of 25 μm from the center of the laser beam spot is 1.7×10-6 to 1.0×10-5 seconds. The method leaves a certain roughness on the surface of the substrate while removing fine and sharp protrusions on the surface.