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Erosion Performance for Co-continuous Phase Composite of SiC Foam Ceramic/Ductile Iron |
WAN Wei1,2, CAO Xiaoming1, ZHANG Jinsong1( ) |
1.Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China 2.School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China |
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Cite this article:
WAN Wei, CAO Xiaoming, ZHANG Jinsong. Erosion Performance for Co-continuous Phase Composite of SiC Foam Ceramic/Ductile Iron. Chinese Journal of Materials Research, 2020, 34(5): 361-367.
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Abstract Co-continuous phase composite of SiC foam ceramic/ductile iron (DI) (SiCfoam/DI) was prepared by extrusion casting with the oxidized SiC foam ceramic as reinforcer, while the bare DI and composite of SiCparticles/ID were taken as comparison. The gas-solid two-phase flow induced erosion behavior of the three materials was assessed via a home-made gas-solid two-phase flow erosion tester, so that to reveal the effect of the erosion time (t), particle velocity (ν) and erosion angle (α), as well as the relevant erosion mechanisms. The results show that with the increasing erosion time, the erosion rate of the three materials decreased gradually and then down to a stable level. With the increase of particle impact velocity the erosion rate of DI increased gradually, and the erosion rate is proportional to ν2.95. While composites of SiCParticles/DI and SiCfoam/DI had similar erosion rates when the impact velocity was less than 87.5 m/s. When the impact velocity was greater than 87.5 m/s, the erosion rate of SiCParticles/DI was significantly higher than that of SiCfoam/DI. With the increase of erosion angle, DI exhibited erosion characteristics of brittle material, but SiCParticles/DI and SiCfoam/DI composites exhibited typical erosion characteristics of plastic material. The maximum erosion rate corresponded to the erosion angle 45°. The erosion mechanism of DI was micro-cutting at low angle, while erosion pitting and micro-cracking at high angle. For high-speed particle impact, SiCfoam/DI composite had better erosion- and wear-resistance than that of SiCParticles/DI composite and DI due to the overall reinforcement and shadow protection of SiC foam ceramics.
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Received: 22 March 2019
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Fund: National High Technology Research and Development Program of China(2012AA03A508) |
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