Mechanical properties of CuNi films

Brückner W, Macionczyk F, Reiss G. Mechanical properties of CuNi films. Mat. Res. Soc. Symp. Proc. 1997;436:47

Young's modulus and tensile strength of CuNi(Mn) thin films on polyimide foils by tensile testing

Macionczyk F, Bruckner W, Pitschte W, Reiss G. Young's modulus and tensile strength of CuNi(Mn) thin films on polyimide foils by tensile testing. Journal of Materials Research. 1998;13(10):2852-2858.Force-strain curves were measured for 1.0 mu m and 1.5 mu m thick Cu0.57Ni0.42Mn0.01 films on 8 mu m thick polyimide foils by tensile testing. By separating the force working on the polyimide foil from that working on the metal-polyimide compound, stress-strain curves for the CuNi(Mn) films were obtained. Young's modulus and tensile strength were determined for as-deposited and annealed [350 degrees C, 1 h, N-2/H-2 (5 vol %) atmosphere] films by this method. Crack propagation starts at the end of the elastic region at 0.2 to 0.7% strain, depending on the film thickness and the thermal treatment. The cracking behavior is described by a steady-state approximation

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