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5350 |
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Wednesday, June 07, 2017, Hall Y 4:00 PM Session Young Professionals |
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Thermal spraying of thin metallic coatings |
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Fabian Trenkle / obz innovation gmbh, Germany Max Winkelmann / obz innovation gmbh, Germany R. Köhler*/ obz innovation gmbh, Germany Sven Hartmann/ obz innovation gmbh, Germany J. Luth/ obz innovation gmbh, Germany |
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Thin film coatings are widely used in different kind of applications. For a thickness of <5 µm, there are efficient and economic technologies like PVD or galvanic processes. Above 50 µm conventional thermal spray processes can be used. But especially in between, for a coating thickness of about 5 50 µm the processes are often not clearly defined because of technological, economical or quality issues. Therefore, obz addresses this coating thickness gap between thin film and thermal spray technologies. In this publication the main focus is set on silver coatings within the mentioned thickness range. Such coatings can be used instead of galvanic ones, which are more and more uneconomical with increasing coating thickness >5 µm, since coating thickness directly correlates with the time a part has to be in an electrolytic bath. Applications for such thin metallic coatings can be found in various fields. In case of silver, applications that need a low electric resistance on the surface can be interesting. An example for this are parts that need a low contact resistance, e.g. since they are clamped together and electric current has to flow through it. Thus, the silver coating provides a low electric contact resistance between the parts with additionally good thermal conductivity at the same time. |