Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Other

Holger Ziegele

Hans-Joachim Scheibe

Berndt Brenner

Steffen Bonss

Carl-Friedrich Meyer

Bernd Schultrich

The invention relates to a method and a device for coating substrates in a vacuum, in which a plasma is generated from a target using a laser beam and ionized particles of the plasma are deposited on the substrate in the form of a layer, inert reactive gas or a gas mixture being supplied. The solution according to the invention is intended to provide a possible way of supplying gases or gas mixtures in a locally and temporally defined manner. According to the invention, this object is achieved by the fact that the gas or gas mixture is supplied to the plasma from and/or through a porous target, the intention being that the target is to have a temporary storage function on account of its porosity.

Method and device for coating substrates in a vacuum

The invention relates to a wear-resistant, highly stressed and low-friction boundary coating construction for titanium or the alloys thereof which can be advantageously used in order to protect human implants. According to the inventive boundary coating construction the boundary coating is comprised of a 200 to 400 nm thick DLC coating ( ), a 5 to 50 nm thick intermediate coating ( ) and a 0.3 to 2.0 mm thick gas alloyed coating ( ), said gas alloyed coating having a hardness between 600 HV and 1,400 HV . The inventive boundary coating construction is produced by firstly melting the surface of the member which is to be protected. The surface is then gas alloyed and cleaned in an N /Ar atmosphere. Subsequently, the intermediate coating is first deposited followed by a depositing of the hard amorphous carbon coating by means of the laser-induced, pulsed vacuum arc (laser-arc) method.

Wear-resistant, mechanically highly stressed and low-friction boundary coating construction for titanium or the alloys thereof and a method for producing the same

Wear-resistant edge layer for titanium and its alloys which can be subjected to high loads and has a low coefficient of friction. The wear-resistant edge layer includes a hard amorphous carbon layer, an intermediate layer, and a laser gas alloyed layer. The wear-resistant edge layer may include a 200 to 400 nm thick hard amorphous carbon layer, a 50 to 200 nm thick intermediate layer, and a 0.3 to 2.0 mm thick laser gas alloyed layer. The laser gas alloyed layer may include precipitated titanium nitride needles and have a hardness between 600 HV0.1 and 1400 HV0.1. Process for producing a wear resistant edge layer on a substrate. The process includes forming a laser gas alloyed layer by melting a surface of a substrate, applying an intermediate layer by Laser-Arc, and depositing a hard amorphous carbon layer on the intermediate layer by Laser-Arc.

Wear-resistance edge layer structure for titanium or its alloys which can be subjected to a high mechanical load and has a low coefficient of friction, and method of producing the same

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Lorch, Germany

Holger Ziegele