Kinetics and mechanism of hot corrosion of gamma-Y(2)Si(2)O(7) in thin-film Na(2)SO(4) molten salt
文献类型：期刊论文
| 作者 | Z. Sun ; M. Li ; Y. Zhou |
| 刊名 | Journal of the American Ceramic Society
 |
| 出版日期 | 2008 |
| 卷号 | 91期号:7页码:2236-2242 |
| 关键词 | silicon-nitride ceramics solubility sulfate si3n4 |
| ISSN号 | 0002-7820 |
| 中文摘要 | gamma-Y(2)Si(2)O(7) is a promising candidate material both for high-temperature structural applications and as an environmental/thermal barrier coating material due to its unique properties such as high melting point, machinability, thermal stability, low linear thermal expansion coefficient (3.9 x 10(-6)/K, 200 degrees-1300 degrees C), and low thermal conductivity (< 3.0 W/m.K above 300 degrees C). The hot corrosion behavior of gamma-Y(2)Si(2)O(7) in thin-film molten Na(2)SO(4) at 850 degrees-1000 degrees C for 20 h in flowing air was investigated using a thermogravimetric analyzer (TGA) and a mass spectrometer (MS). gamma-Y(2)Si(2)O(7) exhibited good resistance against Na(2)SO(4) molten salt. The kinetic curves were well fitted by a paralinear equation: the linear part was caused by the evaporation of Na(2)SO(4) and the parabolic part came from gas products evolved from the hotcorrosion reaction. A thin silica film formed under the corrosion scale was the key factor for retarding the hot corrosion. The apparent activation energy for the corrosion of gamma-Y(2)Si(2)O(7) in Na(2)SO(4) molten salt with flowing air was evaluated to be 255 kJ/mol. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/33091]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | Z. Sun,M. Li,Y. Zhou. Kinetics and mechanism of hot corrosion of gamma-Y(2)Si(2)O(7) in thin-film Na(2)SO(4) molten salt[J]. Journal of the American Ceramic Society,2008,91(7):2236-2242. |
| APA | Z. Sun,M. Li,&Y. Zhou.(2008).Kinetics and mechanism of hot corrosion of gamma-Y(2)Si(2)O(7) in thin-film Na(2)SO(4) molten salt.Journal of the American Ceramic Society,91(7),2236-2242. |
| MLA | Z. Sun,et al."Kinetics and mechanism of hot corrosion of gamma-Y(2)Si(2)O(7) in thin-film Na(2)SO(4) molten salt".Journal of the American Ceramic Society 91.7(2008):2236-2242. |
入库方式： OAI收割
来源：金属研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。