The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 03, 2015
Filed:
Feb. 09, 2012
Paulo Jose Da Rocha Mordente, Viala Progresso, BR;
Paulo Jose Da Rocha Mordente, Viala Progresso, BR;
Mahle International GmbH, , DE;
Mahle Metal Leve S/A, , BR;
Abstract
The present invention has the objective of solving the problems encountered in coating engine components (engine blocks or sleeves, either fixed or movable) having at least one cylindrical cavity and composed mainly by iron or aluminum, providing them with a coating () that is subdivided into three different layers, which are deposited onto the metallic substrate (), which are first sub-layer () comprising at least 80% silicon deposited onto the substrate () with the function of providing interface with good adhesion between the substrate () and the subsequent sub-layers, which contain hydrogenated amorphous carbon, second sub-layer () of transition comprising a percentage of silicon and of hydrogenated amorphous carbon (a-C:H:Si) and, finally, on the working surface, third sub-layer () having a pure composition of hydrogenated amorphous carbon (a-C:H), wherein such coating () is generated by the hollow cathode effect (HCE) by plasma-enhanced chemical vapor deposition (PECVD).