高发射率MoSi2-SiC-Al2O3涂层在刚性绝缘上,具有增强的热保护性能
Xukun Yang1,2, Yange Wan3, Jiancun Li4
1Key Lab of Advanced Ceramics and Machining Technology of Ministry of Education, School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China.
Materials (Basel, Switzerland)
|January 11, 2024
概括
这项研究引入了一种新型的高排放性涂层,使用盐作为粘合剂,与传统的盐涂层相比,显示出优越的绝热和排放性. 新的涂层为高温应用提供了更好的耐用性和性能.
科学领域:
- 材料科学 材料科学 材料科学
- 表面工程是什么?表面工程是什么?
- 热涂料 热涂料 热涂料
背景情况:
- 高排放性涂层对于热管理和能源效率至关重要.
- 盐一直是这种涂料的主要粘合剂,限制了性能.
- 需要新的粘合剂来改善涂层特性,如排放性和耐久性.
研究的目的:
- 开发和描述一种新的高排放性涂层,使用盐作为粘合剂.
- 评估涂层在高温下结构,组成和光谱发射率的演变.
- 评估新型涂层的绝热性能.
主要方法:
- 使用合金索尔粘合剂制备MoSi2-SiC-Al2O3涂层在多石绝缘上.
- 从1000-1400°C进行结构和组成变化的分析.
- 测量光谱发射率 (200nm至25μm) 和隔热性能.
主要成果:
- 基于基的涂层表现出更好的结构均性和表面粗性.
- 在较低的温度下形成的mullite胡须,增强了涂层的完整性.
- 总发射率达到0.922 (200-2500纳米) 和0.897 (2.5-25微米).
- 由于氧化而导致的发射率降低明显较低 (-10.2%),相比于二氧化涂层 (-18.6%).
- 涂层基板显示冷表面温度下降215°C.
结论:
- 粉是高排放性涂料的可行和有效的粘合剂.
- 该MoSi2-SiC-Al2O3涂层表现出优异的绝热和高排放性.
- 这种新型涂层为高温应用提供了更好的性能和耐用性.
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