Invention Grant
- Patent Title: Surface texture providing improved thermal spray adhesion
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Application No.: US15184699Application Date: 2016-06-16
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Publication No.: US10106878B2Publication Date: 2018-10-23
- Inventor: Zhe Li , Martin S. Kramer , Yucong Wang , Jianghuai Yang
- Applicant: GM Global Technology Operations LLC
- Applicant Address: US MI Detroit
- Assignee: GM GLOBAL TECHNOLOGIES OPERATIONS LLC
- Current Assignee: GM GLOBAL TECHNOLOGIES OPERATIONS LLC
- Current Assignee Address: US MI Detroit
- Main IPC: C23C4/02
- IPC: C23C4/02 ; F02F1/00

Abstract:
An improved substrate surface texture i.e., roughness, significantly improves the adhesion of thermal spray coatings. The surface texture is defined by two metrology parameters and the invention comprehends a range of average roughness (Sa) between 9 and 15 μm and developed interfacial area ratio (Sdr) of greater than 100%. This surface texture is achieved by methods such as water jet erosion, mechanical roughening, laser texturing, chemical etching and plasma etching. The surface texture is especially beneficial for walls of cylinders of internal combustion engines, hydraulic cylinders and similar components to which a thermal spray coating is adhered and which are exposed to sliding or frictional wear.
Public/Granted literature
- US20170362691A1 SURFACE TEXTURE PROVIDING IMPROVED THERMAL SPRAY ADHESION Public/Granted day:2017-12-21
Information query
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