Overview of thermal barrier coatings in diesel engines
| 详细信息 | 推荐本文 | |
- 作者：T. M. Yonushonis (1)
- 关键词：diesel engine experience ; failure behavior ; mullite coating ; thermal barrier coating
- 刊名：Journal of Thermal Spray Technology
- 出版时间：March 1997
- 出版年：1997
- 期刊代码：pc357_1059-9630
- 类别：ch
- 卷：6
- 期：1
- 页码：50-56
- 数据来源：sp
摘要
An understanding of delamination mechanisms in thermal barrier coatings (TBCs) has been developed for diesel engine applications through rig tests, structural analysis modeling, nondestructive evaluation, and engine evaluation of various TBCs. This knowledge has resulted in improved TBCs that survive se-vere cyclic fatigue tests in high-output diesel engines. Although much conflicting literature now exists regarding the impact of TBCs on engine performance and fuel consumption, changes in fuel consumption appear to be less than a few percent and can be nega-tive for state-of-the-art diesel engines. The ability of the TBC to improve fuel economy depends on a num-ber of factors, including the fuel injection system, combustion chamber design, and initial engine fuel economy. Limited investigations on state-of-the-art diesel engines have indicated that surface- connected porosity and coating surface roughness may influence engine fuel economy.