کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1472177 | 990373 | 2007 | 12 صفحه PDF | دانلود رایگان |
Isothermal oxidation behavior of Al4SiC4 ceramics at the temperature range from 1200 °C to 1700 °C in air for 10–20 h was investigated. The results indicated that this material had an excellent oxidation resistance from 1200 °C to 1600 °C, and the kinetics of oxidation obeyed the parabolic law with an activation energy of 220 ± 20 kJ mol−1. The oxide scales consisted of an outer oxide layer with higher density, a middle oxide layer with a few of large size pores and a reaction layer which is near to the matrix with a number of small size pores over the temperature ranges. A number of pores exist in the middle oxide scale. The oxide surface and cross-sectional morphologies were observed by scanning electron microscope (SEM) technique and the formation mechanism of the oxidation layers was also analyzed.
Journal: Corrosion Science - Volume 49, Issue 5, May 2007, Pages 2059–2070