陶瓷颗粒表面沉积层性能的研究

采用化学气相沉积技术对氧化铝颗粒表面进行沉积层处理, 研究了沉积层的高温抗氧化性, 沉积层的结合强度以及沉积层对氧化铝颗粒与金属基体界面结合强度的影响。结果表明: N i 沉积层的氧化产物有助于提高界面湿润性、改善界面结构; 沉积层的膜基分离结合强度较高; 沉积层可明显提高氧化铝陶瓷与金属基体间的界面结合强度, 且有沉积层时的界面结合强度是无沉积层时的6 倍多, 界面无缝隙存在。 

STUDY OF THE PROPERTIES OF DEPOSITING LAYER ON THE SURFACE OF CERAMIC PARTICLES

The technology of chemical vapor deposition has been used for the depositing layer treatment on the surface of alumina particle, and their properties were also studied, including the oxidation resistant under high temp., the adhesion strength of depositing film, and the influence on the interface adhesion strength between particles and metal matrix. The results show that the interface wettability has been increased and the interface construction has been improved because of the Ni depositing layer oxided; the adhesion strength of depositing film is high; the interface adhesion strength between alumina particles and metal matrix is remarkably increased, 6 times higher than that of undepositing's, and interface of the composite is crackless.