摘要
探索了一种采用sol-gel热压法一次性制备厚陶瓷涂层的新技术。在样品表面涂覆sol-gel与纳米、微米氧化物粉组成的混合料浆层,在加压加热条件下使其固化,然后在高温下烧结,可以在试样表面获得一层连续的、厚的Al2O3-Y2O3陶瓷涂层。扫描电子显微镜(SEM)、X射线衍射(XRD)结果分析表明,该陶瓷涂层与基体结合紧密,厚度大于10μm。900℃氧化的实验结果表明,用此方法制备的陶瓷涂层具有优异的抗高温氧化性能。
A novel technique for preparing thick ceramic coatings has been explored using sol-gel thermal pressure process. Continuous and thick Al2O3-Y2O3 ceramic coatings can be obtained by supplying mixture slurry on the surface of specimen, which is composed of sol-gel, nano-and micro-sized oxide particles, solidifying the mixture slurry under the condition of elevated temperature and high pressure, and then sintering it at higher temperature. The analysis results of SEM and XRD reveal that the ceramic coating of over 10 μm thick has a tight adhesion to the substrate. The oxidation test results at 900°C show that as-achieved Al2O3-Y2O3 ceramic coating possesses an excellent oxidation resistance at high temperature.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2005年第6期101-104,共4页
Transactions of Materials and Heat Treatment
基金
国家自然科学基金项目(50271010)
