Effect of Silicon Addition on High-Temperature Solid Particle Erosion-Wear Behaviour of Mullite-SiC Composite Refractories Prepared by Nitriding Reactive

Author:

Li Xiaochao1,Chen Shusen1,Huang Zhaohui1,Fang Minghao1,Liu Yan’gai1,Wu Xiaowen1,Huang Juntong1,Liu Baolin2

Affiliation:

1. School of Materials Science and Technology, National Laboratory of Mineral Materials, China University of Geosciences (Beijing), Beijing 100083, China

2. Key Laboratory on Deep Geodrilling Technology of the Ministry of Land and Resources, China University of Geosciences (Beijing), Beijing 100083, China

Abstract

Solid particle erosion-wear experiments on as-prepared mullite-SiC composite refractories by nitriding reactive sintering were performed at elevated temperatures, using sharp black SiC abrasive particles at an impact speed of 50 m/s and the impact angle of 90° in the air atmosphere. The effects of silicon powder addition and erosion temperature on the erosion-wear resistance of mullite-SiC composite refractories were studied. The test results reveal that Si powders caused nitriding reaction to formβ-sialon whiskers in the matrix of mullite-SiC composite refractories. The erosion-wear resistance of mullite-SiC composite refractories was improved with the increase of silicon powder addition and erosion temperature, and the minimum volume erosion rate was under the condition of 12% silicon added and a temperature of 1400°C. The major erosion-wear mechanisms of mullite-SiC composite refractories were brittle erosion at the erosion temperature from room temperature to 1000°C and then plastic deformation from 1200°C to 1400°C.

Funder

National Natural Science Foundation of China

Publisher

Hindawi Limited

Subject

General Engineering,General Materials Science

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