测控技术2012，Vol.31Issue(10)：124-127,132,5.
等离子喷涂涂层物理性能的超声检测
Ultrasonic Testing on Physical Property of Plasma Sprayed Coating
江毅 1王兴国1
作者信息
- 1. 景德镇陶瓷学院机电学院,江西景德镇 333400
- 折叠
摘要
Abstract
Acoustic characteristics of plasma sprayed coating are studied with the ultrasonic testing. Porosities of the coatings are tested by buoyancy method. The analytic equation of ultrasonic propagation in the coating based on spectrum analysis is deduced. A transfer function H(f) is established, which contains information on the acoustic properties of the coating. Not only the ultrasonic propagation velocity in the coating, but also reflection coefficient, attenuation coefficient, density of the coating can be acquired. It is found that these parameters mentioned above can characterize physical property of the coating. The relationships between porosity and reflection coefficient, sound velocity, attenuation coefficient are investigated respectively. The results show that reflection coefficient and attenuation coefficient increase with the increase of porosity of the coating. The sound velocity decreases with the increase of porosity. The method is suitable for the evaluation of the coating quality关键词
超声检测/孔隙率/声速/反射系数/衰减系数Key words
ultrasonic testing/ porosity/ sound velocity/ reflection coefficient/ attenuation coefficient分类
矿业与冶金引用本文复制引用
江毅,王兴国..等离子喷涂涂层物理性能的超声检测[J].测控技术,2012,31(10):124-127,132,5.
