PVD-Beschichtung bei niedrigen Temperaturen und neue Schichtsysteme. Karbidische Schichten mit ARC-IONPLATING-Technik mit Praezisionsteilen

Published in F95B840Available from TIB Hannover / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekSIGLEBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman

Karbidische Schichten mit ARC-IONPLATING-Technik auf Praezisionsteilen

Within the presented project investigations of carbid coatings on precision parts for textile needles, plotter tops and car chain parts are reported. The carbid coatings are developed on basis of the arc-ionplating pvd-process. The coatings are deposited either in one thermodynamical phase or heterogenous two phase system. The nanodispers high carbon-metal carbid resulted as an effective coating system against wear: on the car chain system best fitted hardness of the layer is below 2000 HVO.01 and the hardness of the plotter tops must be higher than 3000 HVO.01 to guarantee an effective resistance against abrasion wear. (orig.)SIGLEAvailable from TIB Hannover: F94B0216+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Forschung und Technologie (BMFT), Bonn (Germany)DEGerman

PVD-Beschichtungen von Metalloberflaechen zur Verschleissminderung von Polyaethylen im kuenstlichen Kniegelenk Abschlussbericht

A significant clinical problem in the use of joint prostheses with polyethylene and metal components is the polyethylene wearout. Modifications of surfaces of titanium alloys with bio-compatible hard material coatings like (Ti, Nb)N, (Ti, Nb)ON, (Ti, Ta)N TaON and Ta_2O_5 are tested as a wear protection for the polyethylene component. A special hard coating design can be achieved by a reactive arc physical vapor deposition technique, using partitioned targets. The coatings were physically characterized by SNMS, EDX, SEM, XRD, scratch-tests, corrosion resistance and contact angle measurements. Biological tests included investigations concerning zyto-toxic behavior, vitality of cells and the Northern-ELISA method. Especially (Ti, Nb)ON and Ta_2O_5 films qualified for the coating of joint prostheses because of their high corrosion resistance, their high adhesion to the substrates and the ability of reproducible industrial production. (orig.)SIGLEAvailable from TIB Hannover: F99B901+a / FIZ - Fachinformationszzentrum Karlsruhe / TIB - Technische InformationsbibliothekBundesministerium fuer Bildung, Wissenschaft, Forschung und Technologie, Bonn (Germany)DEGerman