Phase behavior analysis of MgO-C refractory at high temperature: Influence of Si powder additives

被引：16
作者：
Liu, Haitao [1 ]
Meng, Fanrong [2 ,3 ]
Li, Qing [2 ,3 ]
Huang, Zhaohui [1 ]
Fang, Minghao [1 ]
Liu, Yan-gai [1 ]
Wu, Xiaowen [1 ]
机构：
[1] China Univ Geosci, Natl Lab Mineral Mat, Beijing Key Lab Mat Utilizat Nonmetall Minerals &, Sch Mat Sci & Technol, Beijing 100083, Peoples R China
[2] Aviat Gen Hosp, Dept Stomatol, Beijing 100012, Peoples R China
[3] Chinese Acad Sci, Beijing Inst Life Sci, Beijing 100101, Peoples R China
来源：
CERAMICS INTERNATIONAL | 2015年 / 41卷 / 03期
基金：
中国国家自然科学基金; 高等学校博士学科点专项科研基金;
关键词：
MgO-C refractory; Phase transformation; beta-SiC; Nanowires; Vapor-solid process; THERMAL EVAPORATION; OXIDATION BEHAVIOR; NANOWIRES; BRICKS; CARBON; MECHANISM; COMPOSITES; SLAG; AL; ANTIOXIDANTS;
D O I：
10.1016/j.ceramint.2014.12.029
中图分类号：
TQ174 [陶瓷工业]; TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
Phase changes of Si powder in the MgO-C refractory were investigated in a reducing atmosphere system at 1500 degrees C. The phase compositions, morphology and microstructures of the products were determined using X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (FIRTEM) and energy dispersive spectroscopy (EDS). beta-SiC nanowires were synthesized in the pores of MgO-C bricks without the assistance of catalysis. The synthesized nanowires were typically a few hundred nanometers to several micrometers in length. The formation process was governed by VS mechanism. The formed beta-SiC nanowires may help to reinforce the mechanical properties and enhance the antioxidation properties of MgO-C bricks. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
引用
收藏
页码：5186 / 5190
页数：5
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