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The Improvement of Tribological Property with Diamond-like Carbon Film on the Artificial Joint
Author: ShiZhiFeng
Tutor: HuangZuo
School: Southwest Jiaotong University
Course: Materials Physics and Chemistry
Keywords: DLC multilayers The magnetic filtration vacuum arc deposition Artificial joints Tribological properties
CLC: O484
Type: Master's thesis
Year: 2008
Downloads: 59
Quote: 1
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Abstract
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Research DLC film preparation process based on adjusting the mix of hard and soft amorphous carbon films, alternating deposition synthesis of a series of different structure and properties of DLC films. Explore the effect of the improvement of the structure and performance of different DLC films on the surface of the artificial joint performance basic theoretical research in the application of the artificial joint surface, DLC films. Scratch the bonding strength of the film and the substrate of synthetic multilayer diamond-like carbon film; microhardness of the films, nano-hardness and elastic modulus were measured. The structure of the films were characterized by Raman spectroscopy (Raman) and X-ray photoelectron spectroscopy (XPS) analysis of the impact of the different structure of the performance. The pin disc tribometer test the friction and wear properties of DLC multilayers in the atmospheric environment; DLC multilayers of the different structure of the surface of the artificial joint simulation of deposition, in simulated body fluid, fetal bovine serum tribological properties of the artificial joint surface patch samples were evaluated, to explore the effect of the DLC films on the the articular surface properties of the modified. The results indicate that the soft and hard film in the multilayer film with the way, the mechanical properties of the structure of the films, modulus of elasticity, microhardness obvious impact. The thin film prepared in a relatively low coefficient of friction, and can also have a high elasticity while having a high hardness. Prepared in this study a film thickness of from 0.3μm to 1.2μm, the surface quality of the film with the increase in the thickness variation, the flaking and black particles increased. After the preparation of the surface of the artificial joint material multilayered DLC films, the hardness and elastic modulus of the material is greatly improved. With the change of the film composition in the film, the hardness and elastic modulus of the film is also a wide range changes. Adjust multilayer diamond-like carbon film in the film, the elastic modulus of the multilayers highest microhardness can reach the 398GPa above, the highest in the 60GPa, mechanical properties and plating system DLC films DC0v/DC80v mix the most excellent in the denseness of the film is good. The buffer layer of titanium metal is introduced in the present study, significantly improve the binding force of the multilayer film and the substrate. Multilayer film has very excellent wear resistance, and SiC ball mill in the atmosphere under the stable friction coefficient of 0.08, the FBS buffer multilayer diamond film and the ultra high molecular weight polyethylene wear in film surface intact after 20 million cycles. After the artificial joint surface deposition of diamond-like carbon film with ultra-high molecular weight polyethylene material grinding, the amount of wear of the polyethylene material was significantly lower than grinding wear with a cobalt-chromium alloy, and the friction and wear thin film remained intact. Comprehensive studies have shown that magnetic synthesized filtered vacuum arc deposition method has good film-based binding force of high hardness, high elastic modulus, excellent wear resistance DLC multilayer films. The multilayer film is expected to improve the application of artificial joint tribological properties.
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CLC: > Mathematical sciences and chemical > Physics > Solid State Physics > Thin Film Physics
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