New bionic function surfaces inspired by the desert scorpion
Three elements, bump, groove-shape and curvature, were applied on the surface.
Test methods used
Using of Stereo Microscope, the micro-structures of the scorpion (Androctonus australis) were analysed. According to information, bionic samples were manufactured. Solid particle erosion behaviour is investigated using a blasting jet machine at particle impact angle (30°) and stress of air compressor is 0.5 MPa. The experimental results of bionic samples were compared with traditional smooth sample and each other, respectively. Results of erosion test and Scanning Electron Microscope (SEM) were selected as evaluation standard and explored anti-erosion mechanisms of these micro-structures which were on the bionic surface.
Superiour solid particle erosion resistance
The experimental results show that bionic samples have superiour solid particle erosion resistance than traditional smooth sample, owing to the micro-structures on the surface. Referring to the analysis, both the bump and curvature can improve the anti-erosion performance by changing the relative impact angle which is compared to the surface of sample.
The study is published in: Surface and Coatings Technology, Volume 313, 15 March 2017, Pages 143–150