For economic and environmental reasons, dry forming is of increasing interest due to the shortening of process chains, cost savings and reduction of environmental pollution. The aim of these investigations is to examine to what extent chemical vapor deposited (CVD) diamond coatings are suitable for dry forming of aluminum and to identify the surface topology requirements for a low friction coefficient and low wear. Nine different surface topologies of CVD diamond coatings were tested in an oscillating ball-on-plate tribometer test against aluminum balls with a Hertzian contact stress of 759 MPa and 99,900 cycles. It could be concluded that the peak material volume (Vmp) of the diamond coating is the most important factor for achieving a low abrasion of aluminum as well as a low friction coefficient against aluminum. The Vmp should be smaller than 0.04 ml/m 2 . Microcrystalline CVD diamond with a post-treated surface has great potential for dry forming of aluminum.

中文翻译：

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多晶 CVD 金刚石涂层的峰值材料体积对铝干摩擦的影响

出于经济和环境原因，干法成型由于缩短了工艺链、节省了成本和减少了环境污染而受到越来越多的关注。这些研究的目的是检查化学气相沉积 (CVD) 金刚石涂层在多大程度上适用于铝的干法成型，并确定低摩擦系数和低磨损的表面拓扑要求。在 759 MPa 的赫兹接触应力和 99,900 次循环的情况下，针对铝球，在摆动式球盘摩擦计测试中测试了九种不同的 CVD 金刚石涂层表面拓扑结构。可以得出结论，金刚石涂层的峰值材料体积 (Vmp) 是实现铝的低磨损以及对铝的低摩擦系数的最重要因素。Vmp 应小于0.04 ml/m 2 。表面经过后处理的微晶 CVD 金刚石对于铝的干成型具有巨大的潜力。