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Preparation and Erosion Performance for Co-continuous Phase Composites of Si3N4/1Cr18Ni9Ti |
Qi DU1,2,Yong GAO1,Zhiheng REN1,3,Xiaoming CAO1,Chao WANG1,Jinsong ZHANG1( ) |
1. Institute of Metal Research, Chinese Academy of Science, Shenyang 110016, China 2. School of Materials Science and Engineering, University of Science and Technology of China, Shenyang 110016, China 3. Liaoning ZhuoYi New Materials Corporation, Yingkou 115004, China |
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Cite this article:
Qi DU,Yong GAO,Zhiheng REN,Xiaoming CAO,Chao WANG,Jinsong ZHANG. Preparation and Erosion Performance for Co-continuous Phase Composites of Si3N4/1Cr18Ni9Ti. Chinese Journal of Materials Research, 2019, 33(1): 34-42.
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Abstract Composites with co-continuous structure of Si3N4/1Cr18Ni9Ti were prepared via a two-step process, namely gel casting and pressure casting. The phase composition, macro- and micro-structure of the composites were characterized. The erosion rate in flow slurry composed of water and quartz sand, as a function of impingement angle, flow velocity, sand content and erosion time was assessed in comparison with the plain 1Cr18Ni9Ti. Results show that Si3N4/1Cr18Ni9Ti composites exhibited a perfect co-continuous phase structure with a good combination between Si3N4 and 1Cr18Ni9Ti; the fluctuation of erosion rate as a function of impingement angle of this composites is smaller than that of 1Cr18Ni9Ti; the erosion rate of composites has an exponent relationship with flow velocity (E∝V 0.67), while there is a linear relationship between the erosion rate and flow velocity for 1Cr18Ni9Ti; the erosion rate of this composites decreases gradually with the increasing erosion time and then stabilizes, while that of 1Cr18Ni9Ti is hardly changed; There is a linear relationship between the erosion rate and sand content in the slurry for the two materials. The composite with co-continuous structure of Si3N4/1Cr18Ni9Ti exhibits superior erosion resistance, in contrast with the plain 1Cr18Ni9Ti steel.
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Received: 26 April 2018
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Fund: National Key Research and Development Program of China(2017YFB0310405) |
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