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5247 |
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Coating of vulcanized fibre - pre-treatment |
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Alexander Brinkhoff* / University of Dortmund, Germany Wolfgang Tillmann / Institute of Materials Engeneering, Germany Ingor Baumann/ Institute of Materials Engeneering, Germany Kevin Schmidt/ Institute of Materials Engeneering, Germany Reiner Zielke/ Institut für Forschung und Transfer (RIF e.V.), Germany |
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In light weight constructions, researches focus more and more on ecological aspects of materials. In this way vulcanized fibre relive a renaissance because it is produced from renewable raw materials. Vulcanized fibre is a composite material, which was approximately discovered in 1855. It is manufactured by parchmentizing of pulp with the use of a zinc chloride solution. This material is well known for its good strength to weight relationship, but it is susceptible for contact with fluid and shows low wear resistance. Therefore, a functionalisation of the surface is needed. The functionalization can be realized by thermal spray processes to increase the potential of vulcanized fibre. Especially the pretreatment of the specimen is one of the key topics of this paper. Vulcanized fibre is a thermal sensitive material. The impact of hot splats can cause reactions (e.g. degradation) on the interface of the specimen. To reduce this interaction, twin wire arc spraying and low-pressure cold gas spraying processes were used to coat low-melting materials (copper, zinc) on the specimen. The influence of the coating to the interface was investigated afterwards. Furthermore, non-destructive testing methods were evaluated to gain information about the vulcanized fibre. |