Plasma texturing and coating method for frictional and thermal management
OwnerJingzeng Zhang, Yining Nie +1inventors
InventorsJingzeng Zhang, Yining Nie, Xueyuan Nie
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Abstract
This invention involves a method of making a crater-like texture or a ceramic coating on a surface by electrolytic plasma discharging which occurs in fashion of micro-sized arcs distributing on the surface. The high temperature of plasma and high pressure of vapour bubbles of an electrolyte at the local discharging spots during the plasma activities cause micro-sized craters on the surface. Alternatively, using another selected electrolyte, the surface can also form a ceramic coating with a crater-like texture as its top layer. The surface can be polished, ground or honed afterward, and the surface shows improvements in friction, wear resistance, and heat transfer behavior.
Claims20
A method of making a crater-like textural surface, comprising
- (i) preparing an aqueous electrolyte,
- (ii) applying said electrolyte onto a surface of a metallic component,
- (iii) applying the metallic component with a negative electrical voltage,
- (iv) generating plasma discharging on said surface,
- (v) forming a crater-like texture on said surface, and
- (vi) post-grinding or post-honing the textured surface.
A method of making a crater-like ceramic coating surface, comprising
- (i) preparing an aqueous electrolyte,
- (ii) applying said electrolyte onto a surface of a metallic component,
- (iii) applying the surface with a positive electrical voltage,
- (iv) generating plasma discharging on said surface,
- (v) forming a ceramic coating with crater-like texture on said surface, and
- (vi) post-grinding or post-honing the textured coating surface when the component is used for friction applications.
Dependencies are inferred from the claim text.