Coated article of martensitic steel and a method of forming a coated article of steel

US9115426B2 · kind B2 · utility

Assignee

• Picosun Oy · FI

Inventors

• Ivan Kolev · Broad Brook, US
• Paul Peeters · Eindhoven, NL
• Roland Tap · Koblenzer Straße, DE
• Bertram Haag · Höchstadt an der Aisch, DE
• Yashar Musayev · Nuremberg, DE
• Serge Kursawe · Uttenreuth, DE
• Tim Matthias Hosenfeldt · Nuremberg, DE
• Jurgen Gierl · Erlangen, DE
• Juhana Kostamo · Espoo, FI

Key dates

• Filing date: Dec 27, 2012
• Grant date: Aug 25, 2015
• Expiry date: May 24, 2033

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/265
• WIPO field: Surface technology, coating
• WIPO sector: Chemistry

Abstract

A coated article of steel having at least one layer having a high hardness and a high resistance to wear applied by a deposition (e.g., PVD, a CVD, or PECVD) process, at least one surface region of said article and at least one ALD layer comprising at least one layer of a material deposited by an ALD (atomic layer deposition) process on said at least one layer, wherein the steel of which the article is made is a martensitic grade of steel, wherein the at least one layer, is a DLC layer, a metal-DLC layer, or a CrAlN layer and has a thickness in the range from 0.5 microns to 4 microns and a hardness in the range from 20 GPa to 100 GPa, and wherein the ALD layer has a thickness in the range from 1 nm to 100 nm.