Erosion resistance of bionic functional surfaces inspired from desert scorpions.

In this paper, a bionic method is presented to improve the erosion resistance of machine components. Desert scorpion (Androctonus australis) is a typical animal living in sandy deserts, and may face erosive action of blowing sand at a high speed. Based on the idea of bionics and biologic experimental techniques, the mechanisms of the sand erosion resistance of desert scorpion were investigated. Results showed that the desert scorpions used special microtextures such as bumps and grooves to construct the functional surfaces to achieve the erosion resistance. In order to understand the erosion resistance mechanisms of such functional surfaces, the combination of computational and experimental research were carried out in this paper. The Computational Fluid Dynamics (CFD) method was applied to predict the erosion performance of the bionic functional surfaces. The result demonstrated that the microtextured surfaces exhibited better erosion resistance than the smooth surfaces. The further erosion tests indicated that the groove surfaces exhibited better erosion performance at 30° injection angle. In order to determine the effect of the groove dimensions on the erosion resistance, regression analysis of orthogonal multinomials was also performed under a certain erosion condition, and the regression equation between the erosion rate and groove distance, width, and height was established.

[1]  A. Satapathy,et al.  Erosion Wear Analysis of SiC Filled Glass-Epoxy Composites using Taguchi Technique , 2010 .

[2]  M. Balazinski,et al.  Design of hard coating architecture for the optimization of erosion resistance , 2008 .

[3]  M. Bonnet.  Toxicology of Androctonus scorpion , 1997, British Homeopathic Journal.

[4]  M. Ghosh,et al.  Solid-particle erosion behavior of high-performance thermoplastic polymers , 2008 .

[5]  G. Polis,et al.  Life in sandy deserts: the scorpion model , 1998 .

[6]  Y. Xiaofeng,et al.  Two Species of the Genus Heterometrus Ehrenberg,1828 (Scorpionidae) from South Vietnamsold in Pet Shops in China , 2007 .

[7]  M. Ferraris,et al.  Erosion protective coatings for low density, highly porous carbon/carbon composites , 2009 .

[8]  J. Guilemany,et al.  Corrosion behaviour of thermal sprayed nitinol coatings , 2009 .

[9]  Jianzhong Lin,et al.  The effect of coherent vortex structure in the particulate two-phase boundary layer on erosion , 2000 .

[10]  W. Tabakoff.  Investigation of coatings at high temperature for use in turbomachinery , 1989 .

[11]  Bharat Bhushan,et al.  Green tribology: principles, research areas and challenges , 2010, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences.

[12]  Widen Tabakoff,et al.  Erosion and Deposition in Turbomachinery , 2006 .

[13]  Kun Luo,et al.  Large Eddy Simulation of the Anti-Erosion Characteristics of the Ribbed-Bend in Gas-Solid Flows , 2004 .

[14]  B. Bhushan,et al.  Multiscale effects and capillary interactions in functional biomimetic surfaces for energy conversion and green engineering , 2009, Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences.

[15]  J. Bitter,et al.  A study of erosion phenomena , 1963 .

[16]  E. Volschenk.  A NEW TECHNIQUE FOR EXAMINING SURFACE MORPHOSCULPTURE OF SCORPIONS , 2005 .

[17]  Bharat Bhushan,et al.  Multiscale friction mechanisms and hierarchical surfaces in nano- and bio-tribology , 2007 .

[18]  Luquan Ren,et al.  Biological couplings: Classification and characteristic rules , 2009 .

[19]  Yunhai Ma,et al.  Measuring method for abrasive volume of biomimetic embossed surfaces using reverse engineering , 2008 .

[20]  S. Jain,et al.  Erosion wear behavior of laser clad surfaces of low carbon austenitic steel , 2009 .

[21]  Keyvan Raeissi,et al.  Corrosion performance of HVOF and APS thermally sprayed NiTi intermetallic coatings in 3.5% NaCl solution , 2010 .