公开(公告)号：US20170362691A1

公开(公告)日：2017-12-21

申请号：US15184699

申请日：2016-06-16

Applicant: GM Global Technology Operations LLC

Inventor： Zhe Li ,  Martin S. Kramer ,  Yucong Wang ,  Jianghuai Yang

IPC: C23C4/02 ,  F02F1/00

CPC classification number: C23C4/02 ,  F02F1/004

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.

公开(公告)号：US20170322183A1

公开(公告)日：2017-11-09

申请号：US15145418

申请日：2016-05-03

Applicant: GM Global Technology Operations LLC

Inventor： Jianghuai Yang ,  Martin S. Kramer ,  Qigui Wang ,  Yucong Wang ,  Zhe Li

IPC: G01N29/04 ,  F02F1/18 ,  C23C4/00 ,  F02F1/00

CPC classification number: G01N29/04 ,  C23C4/00 ,  C23C4/18 ,  F02F1/18 ,  F02F2001/008 ,  G01N29/14 ,  G01N2291/0289 ,  G01N2291/101 ,  G01N2291/106 ,  G01N2291/2636

Abstract: A system for inspecting thermal spray coated cylinder bores of aluminum alloy cylinder blocks, the system includes a failure detection apparatus, a heating apparatus, a cooling apparatus, and a control unit in electronic communication with each of the failure detection apparatus, the heating apparatus, and the cooling apparatus, and wherein the control unit includes a memory and a control logic sequence for operating the system.