Initial Stages of ZrB2–30 vol% SiC Oxidation at 1500°C
Initial Stages of ZrB2–30 vol% SiC Oxidation at 1500°C
复制标题
DOI：
10.1111/jace.12843
复制
发表时间：
2014-05
影响因子：
3.9
通讯作者：
Kathleen N. Shugart;W. Jennings;E. Opila
中科院分区：
文献类型：
--
作者：
Kathleen N. Shugart;W. Jennings;E. Opila
分析了ZrB2-30 vol% SiC的初始氧化行为，目的是了解长时间观察到的可变氧化性能之间的关系。用箱式炉在1500℃的空气中氧化样品，时间短至10秒，最长可达100分钟。采用质量变化、扫描电镜、能谱、x射线衍射和x射线光电子能谱等方法对样品进行了表征。硼硅酸盐玻璃和ZrO2的存在早在10 s时就在表面观察到。硼硅玻璃在氧化30s后形成气泡，这是由于玻璃的不均匀分布造成的。表面粗糙度对氧化的影响也进行了探讨，发现在超过30秒的时间内可以忽略不计。
The initial oxidation behavior of ZrB2–30 vol% SiC was analyzed with the goal of understanding any relationship to the variable oxidation performance observed at longer times. A box furnace was used to oxidize samples for times as short as 10 s and up to 100 min at 1500°C in air. The samples were characterized using mass change, scanning electron microscopy, energy dispersive spectroscopy, X-ray diffraction, and X-ray photoelectron spectroscopy to explore the oxidation behavior. The presence of borosilicate glass and ZrO2 was observed on the surface at times as early as 10 s. Bubble formation in the borosilicate glass was observed after 30 s of oxidation and is attributed to uneven distribution of the glass. The impact of surface roughness on oxidation was also explored and found to be negligible for times greater than 30 s.