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Erosion Behavior of Gelcast Fused Silica Ceramic Composites

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Abstract

In this paper, the characteristics of solid particle erosion on fused silica ceramics are investigated. Gelcasting, a near net shape forming process, is adopted for the fabrication of ceramics. Three types of ceramics with a combination of pure fused silica, fused silica+5 wt% silicon nitride (Si3N4) + 1 wt% boron nitride (BN) and fused silica+5 wt% silicon nitride (Si3N4) +1 wt% alumina (Al2O3) are prepared at a constant 52 vol% solid loading, 10 wt% monomer content and 10:1 monomer ratio. Different impingement angles (30o, 45o, 60o and 90o) and three impact velocities (86 m/s, 101 m/s and 148 m/s) were chosen to examine the behavior of erosion on gelcasted ceramics using SiO2 particles as erodent. The maximum rate of erosion is obtained at normal impingement angle (90o), which shows the brittle nature of ceramics. The impact velocity and angle of impingement have an appreciable effect on erosion rate. Resistance to erosive wear is found to have improved with the inclusion of reinforcements in the fused silica ceramics. The erosion rates of different ceramics are compared. Ceramic composite with a combination fused silica+5 wt% Si3N4+ 1 wt% BN shows the highest resistance to wear. The surface roughness and morphology of the eroded surfaces have also been studied.

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Authors and Affiliations

  1. Department of Mechanical Engineering, National Institute of Technology, Warangal, India

    Gurabvaiah Punugupati, P. S. C. Bose, G. Raghavendra, C. S. P. Rao & S. Ojha

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  1. Gurabvaiah Punugupati
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  2. P. S. C. Bose
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  3. G. Raghavendra
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  4. C. S. P. Rao
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  5. S. Ojha
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Correspondence to G. Raghavendra.

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Punugupati, G., Bose, P.S.C., Raghavendra, G. et al. Erosion Behavior of Gelcast Fused Silica Ceramic Composites. Silicon 12, 903–911 (2020). https://doi.org/10.1007/s12633-019-00184-8

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  • DOI: https://doi.org/10.1007/s12633-019-00184-8

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