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The extrusionExtrusion of delicate products, such as aluminum power bonding wires or bioresorbable stents made of magnesium, places challenging demands on the properties of the extrusionExtrusion dies. Very low tolerances in dimensional accuracy and surface quality necessitate suppression of die wear and adhesion effects. In the present study, the effect of Hot Filament Chemical Vapor Deposition diamond coatings on the friction and adhesion was investigated by means of a high temperatureHigh temperature, high speed friction test for extrusionExtrusion. Several diamond coatings were deposited by Hot Filament Chemical Vapor Deposition on a WC–Co alloy containing 6% cobaltCobalt. Using specimen made of aluminum alloy EN-AW1080A and magnesium alloy ZME211, friction and adhesion tests were performed at multiple temperaturesTemperature and normal pressuresNormal pressure typical for the extrusionExtrusion process. The evaluation of the test data obtained indicates that the diamond coating has only a very minor influence on the frictional behavior of the alloys tested. Likewise, no systematic effect on the adhesion behavior was found.

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Influence of HFCVD Diamond Coatings on the Friction and Adhesion in Aluminum and Magnesium Extrusion

  • 会议论文

  • 发表日期：

    2025年

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  • Stefan Lechner,
  • Sören Müller

摘要

The extrusionExtrusion of delicate products, such as aluminum power bonding wires or bioresorbable stents made of magnesium, places challenging demands on the properties of the extrusionExtrusion dies. Very low tolerances in dimensional accuracy and surface quality necessitate suppression of die wear and adhesion effects. In the present study, the effect of Hot Filament Chemical Vapor Deposition diamond coatings on the friction and adhesion was investigated by means of a high temperatureHigh temperature, high speed friction test for extrusionExtrusion. Several diamond coatings were deposited by Hot Filament Chemical Vapor Deposition on a WC–Co alloy containing 6% cobaltCobalt. Using specimen made of aluminum alloy EN-AW1080A and magnesium alloy ZME211, friction and adhesion tests were performed at multiple temperaturesTemperature and normal pressuresNormal pressure typical for the extrusionExtrusion process. The evaluation of the test data obtained indicates that the diamond coating has only a very minor influence on the frictional behavior of the alloys tested. Likewise, no systematic effect on the adhesion behavior was found.