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  • 1990-1994  (2)
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  • 1
    Electronic Resource
    Electronic Resource
    Stability of hydroxylapatite plasma-sprayed coated Ti−6AI−4V under cyclic bending in simulated physiological solutions (1994)
    Springer
    Journal of materials science 5 (1994), S. 457-462 
    Details
    ISSN: 1573-4838
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: The aim of this research was to study the stability of plasma-sprayed eoated metal systems and to evaluate their susceptibility to the occurrence of corrosion fatigue. Hydroxylapatite plasma-sprayed coated samples of Ti−6AI−4V were studied under cyclic bending. During fatigue testing samples were immersed in a simulated physiological solution and mechanical and electrochemical degradation were monitored. Applied loads were intended to crack the ceramic coating and not the metal substrate. Electrochemical impedance spectroscopy was used to further characterize the electrochemical behaviour. No increase in tendency to corrode was detected in open-circuit corrosion fatigue testing. It appears as if the coating cracking does not increase metal substrate corrosion susceptibility. The coating integrity has been seriously affected, with marked decrease in thickness, due to the synergistic effect of load and presence of simulated body fluids environment. Impedance results, however, show a general tendency to an increase in corrosion kinetics after corrosion fatigue testing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00058983
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  • 2
    Electronic Resource
    Electronic Resource
    Pretreatments of improve the adhesion of electrodeposits on aluminium (1991)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 17 (1991), S. 519-528 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Aluminium is generally regarded as a metal that is difficult to plate. By using a pretreatment sequence, which includes immersion in a zincate solution, it is possible to electroplate aluminium successfully, although adhesion levels are not always very high. Zincate solutions modified by the addition of various ions have been shown to promote adhesion. Using one such solution, an investigation has been carried out as to how, by modifying the pretreatment sequence, the adhesion on electrodeposits on aluminium can be improved. Such modifications included varying the etch procedures and using the so-called double dip technique. Some of the factors giving rise to the improved adhesion of electrodeposits have been investigated by SEM, AES, SIMS, ESCA, EPMA and AAS.
    Additional Material: 18 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/sia.740170720
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