Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7998953 | Journal of Alloys and Compounds | 2015 | 6 Pages |
Abstract
SiCp/Hastelloy composites were fabricated by pressureless Ti-activated infiltration process. The wetting and infiltration behaviors of Hastelloy on the SiC substrates and the interfacial reaction between the SiC particles and Hastelloy were investigated by real-time observation system, X-ray diffraction (XRD) and scanning electron microscopy (SEM) equipped with energy X-ray dispersive spectroscopy (EDS) system. The results demonstrated that the Hastelloy had a good wettability on SiC ceramic and could spontaneously infiltrate into the Ti-activated SiC preform. Moreover, intensive interfacial reaction similar to SiC/Ni system was found between the SiC particles and Hastelloy, which induced defects in the microstructure. In order to inhibit the interfacial reaction, Al2O3 coating on SiC particles was adopted as a diffusion barrier, which effectively reduced the extent of the interfacial reactions.
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
Qian Qi, Yan Liu, Hui Zhang, Yinsheng Li, Hanqin Liang, Zhengren Huang,