• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied Surface Science >In situ deposition behavior of silica-based layers and its effect on thermal degradation of IN713 turbine blades during operation of a micro-gas turbine
【24h】

In situ deposition behavior of silica-based layers and its effect on thermal degradation of IN713 turbine blades during operation of a micro-gas turbine

机译：二氧化硅基层的原位沉积行为及其对微型燃气轮机运行期间IN713涡轮叶片的热降解的影响

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This study examined the in situ deposition behavior of silica-based layers on IN713 turbine blades during the operation of a 13 kgf-class gas turbine at a rotation speed of 20,000/min as well as its effect on the degradation of the metallic substrate. Tetraethylorthosilicate (TEOS) was mixed with the fuel (liquid petroleum gas, LPG) and burned to generate silica-based coating precursors for deposition from the flame. Two deposition conditions were adopted. For condition 1 (C1), the silicon-to-carbon ratio in the mixed fuel was set at 0.1 mol% for the first 5 min and at zero mol% for the final 95 min in a 100-min operation. For condition 2 (C2), the ratio was set at 0.005 mol% during the entire 100 min operation. The total TEOS feed was the same under both conditions. C1 resulted in a rather uniform and thicker (5-10 μm on the pressure side) porous silica-based coating on the blade than C2. The in situ deposited layer of C1 was well preserved on the blade and protected the underlying metallic substrate from oxidation during the entire 100 min operation. The layer on the C2 blades was ~5 μm thick at the region near to root, but was too thin in the other areas on the blade to be protective. The early build-up of a porous layer to an effective thickness on the blades produced a thermal barrier toward the substrate as well as a diffusion barrier toward the oxidizing elements during operation.
机译：这项研究研究了在13 kgf级燃气轮机以20,000 / min的转速运行期间，IN713涡轮机叶片上的二氧化硅基层的原位沉积行为及其对金属基材降解的影响。将原硅酸四乙酯（TEOS）与燃料（液化石油气（LPG））混合并燃烧以生成二氧化硅基涂料前体，以从火焰中沉积。采用两种沉积条件。对于条件1（C1），在100分钟的运行中，混合燃料中的硅碳比在开始的5分钟内设置为0.1 mol％，在最后的95分钟内设置为0 mol％。对于条件2（C2），在整个100分钟的操作过程中，该比率设置为0.005 mol％。在两种情况下，总TEOS进料相同。与C2相比，C1在叶片上产生了相当均匀且较厚（在压力侧为5-10μm）的多孔二氧化硅基涂层。在整个100分钟的操作过程中，C1的原位沉积层可以很好地保留在叶片上，并保护下面的金属基材免受氧化。 C2叶片上的根部附近根部区域的厚度约为5μm，但在叶片的其他区域太薄，无法起到保护作用。在操作过程中，将多孔层尽早堆积到叶片上的有效厚度会产生朝向基材的隔热层以及朝向氧化元素的扩散隔热层。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号