Assessment of the surface state behaviour of Al71Cu10Fe9Cr10 and Al3Mg2 complex metallic alloys in sliding contacts |
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| Authors: | N. Diomidis, N. G kan, P. Ponthiaux, F. Wenger,J.-P. Celis |
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| Affiliation: | aKatholieke Universiteit Leuven, Dept. MTM, Kasteelpark Arenberg 44, B-3001 Leuven, Belgium;bÉcole Centrale Paris, Laboratoire de Génie des Procédés et Matériaux, Grande Voie des Vignes, F-92295 Châtenay-Malabry, France;cIstanbul Technical University, Institute of Science and Technology, Materials Science and Engineering, 34469 Istanbul, Turkey |
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| Abstract: | Electrochemical measurements and friction measurements during continuous and intermittent unidirectional sliding tests are used to monitor and to evaluate the surface characteristics of two types of metallic materials characterized by a huge unit cell, namely Al71Cu10Fe9Cr10 and Al3Mg2. The modification of the surface characteristics results from the periodic mechanical removal of a surface film during sliding, and the subsequent (electro)chemical re-growth of a surface film in-between successive sliding contacts. Al71Cu10Fe9Cr10 and Al3Mg2 materials were tested in a phosphate buffer solution pH 7 at 25 °C to compare their depassivation and subsequent repassivation behaviour. The Al3Mg2 material was also tested in a 0.1 M KOH solution pH 13 and 25 °C to reveal the role of constituting metallic elements on the surface film formation. The effect of film formation and removal on the coefficient of friction recorded during unidirectional sliding is discussed. |
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| Keywords: | A. Intermetallics, miscellaneous A. Ternary alloy systems B. Corrosion B. Tribological properties G. Environmental applications |
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