Investigation of an innovative method for the production of diamond reinforced coatings by HVOF and Warm Spraying for highly wear loaded surfaces (re-submission)

金刚石晶粒尺寸小的金刚石金属复合层可用作工具和结构部件（堆焊）的超级耐磨保护层。尤其是在石材加工领域中的高研磨、侵蚀和冲击载荷，例如在深钻孔期间，导致增加的工具磨损，这超出了传统磨损的能力-本研究项目的目的是详细了解高速氧燃料喷涂金属涂层金刚石和金刚石金属粉末的热喷涂过程和机理，HVOF）和温喷涂（WS）。由于高动能和中等热能的组合以及宽的可调参数，该方法提供了用于生产金刚石浸渍金属基质复合材料层的突出特征。在真实磨损条件下的模型试验中，对超音速火焰喷涂（HVOF）和超音速火焰喷涂（WS）制备金刚石-金属复合涂层的潜力进行了初步研究。为此目的，磨料，侵蚀和冲击磨损条件被认为是广泛的。目的是阐明金刚石孕镶金属基复合涂层的磨损和失效机制，并确定热喷涂参数的影响。由于对涂层工艺和磨损机制的全面了解，将有可能制定出作为所有参数函数的最佳解决方案（涂层）。

Diamond metal composite layers with small diamond grain sizes can be used as super wear-resistant protective layers for tools and structural components (hardfacing). Especially the high abrasive, erosive and impact loads in the field of stone processing, for example during deep drilling, lead to increased tool wear, which is beyond the capabilities of conventional wear-resistant coatings.The aim of this research project is to develop a detailed understanding of the processes and mechanisms during the thermal spraying of metallic coated diamonds as well as diamond metal powders by High Velocity Oxygen Fuel Spraying (HVOF) and Warm Spraying (WS). The methods offer, due to the combination of high kinetic and moderate thermal energy as well as the wide adjustable parameters, outstanding features for the production of diamond impregnated metal matrix composite layers. The potential of diamond metal composite layers sprayed by HVOF and WS is investigated fundamentally in model tests under realistic wear conditions. For this purpose, abrasive, erosive and impact wear conditions are considered extensive. The aim is to elucidate the wear and failure mechanisms of diamond impregnated metal matrix composite layers and to identify the influence of thermal spraying parameters. Due to the comprehensive understanding of the coating process and the wear mechanisms, it will be possible to formulate an optimal solution (coating) as a function of all parameters.