Effect of Silicon Addition on High-Temperature Solid Particle Erosion-Wear Behaviour of Mullite-SiC Composite Refractories Prepared by Nitriding Reactive. (16th January 2014)

• Record Type: Journal Article
• Authors: Li, Xiaochao; Chen, Shusen; Huang, Zhaohui; Fang, Minghao; Liu, Yan'gai; Wu, Xiaowen; Huang, Juntong; Liu, Baolin
• Other Names: Ayatollahi Majid R. Academic Editor.
• Is Part Of: Advances in materials science and engineering. Volume 2014(2014)
• Publication Date: 2014-01-16
• Subjects: Materials science -- Periodicals; Materials science; Periodicals; 620.11
• DOI: 10.1155/2014/943542
• Languages: English
• ISSNs: 1687-8434

Abstract

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 form β -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.