Tools coated with diamond film (diamond-coated tools) are used for difficult-to-machine materials such as CFRP. In the manufacture of diamond-coated tools, a pretreatment is required to remove cobalt from the tool using a liquid in order to achieve a uniform diamond film surface. However, there are concerns about the environmental impact of liquid waste from liquid pretreatment (wet processing), and there is a need to develop a process that does not use liquids (dry processing).
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Source: Phys.org