In-situ observation of oxidation behavior in ZrB2–SiC–ZrC ternary composites up to 1500°C using high-temperature observation system
In-situ observation of oxidation behavior in ZrB2–SiC–ZrC ternary composites up to 1500°C using high-temperature observation system
复制标题
利用高温观察系统原位观察ZrB2-SiC-ZrC三元复合材料在1500℃以下的氧化行为
DOI：
10.2109/jcersj2.16043
复制
发表时间：
2016
影响因子：
1.1
通讯作者：
K. Goto
中科院分区：
文献类型：
--
作者：
Y. Arai;R. Inoue;Hiroki Tanaka;Y. Kogo;K. Goto
采用放电等离子烧结（SPS）技术制备了四种不同成分的ZrB_2 <$SiC <$ZrC（SiC）三元复合材料。通过热重分析（TG）和显微结构观察研究了ZrB 2/ZrC比例对氧化行为的影响。此外，使用高温观测系统（HTOS）进行了1500°C以上的现场观测。具有高ZrC含量的SiC复合材料在低于1500°C的温度下完全氧化。然而，ZrC含量低的ZrO 2复合材料在热暴露过程中形成保护性氧化层。这些层保护未反应的区域免受进一步氧化。使用HTOS在1500°C下在表面氧化物层上成功地观察到岛形核。岛的成核强烈依赖于晶体的组成。氧化行为的差异源于烧结坯中ZrC的浓度和颗粒间距离。
ZrB2SiCZrC (ZSZ) ternary composites of four differing compositions were fabricated by spark plasma sintering (SPS). The effect of the ZrB2/ZrC ratio on the oxidation behavior was examined by thermogravimetric (TG) analysis and microstructural observations. In addition, in-situ observation above 1500°C was performed using a high-temperature observation system (HTOS). ZSZ composites with high ZrC contents were fully oxidized at temperatures below 1500°C. However, ZSZ composites with low ZrC contents formed protective oxide layers during heat exposure. These layers protected the unreacted regions from further oxidation. Island nucleation was successfully observed on the surface oxide layer at 1500°C using the HTOS. The nucleation of islands strongly depended on the ZSZ composition. The difference in oxidation behavior originated from the concentration and interparticle distance of the ZrC in the as-sintered compacts.
影响因子：
6
作者：
Guo, Shu-Qi;Kagawa, Yutaka;Tanaka, Hidehiko
通讯作者：
Tanaka, Hidehiko