ABSTRACT
The oxidation behavior of NbTi matrix composite reinforced by ZrB2 particles at 800°C-1200°C were investigated. The oxidation kinetic curves of five specimens with different ZrB2 contents (0–60 wt. %) were obtained, and the phase and morphology of oxidized specimens were analyzed by XRD, SEM and EDS. The result showed that both temperature and ZrB2 content have great influence on oxidation resistance of the NbTi-matrix composites. The main oxide was TiNb2O7 when ZrB2 content was 15% and 30%. As the ZrB2 content increased, Nb2Zr6O17 was the predominant oxide. At 800°C and 1000°C, oxide rate reduced due to the formation of Nb2Zr6O17. When temperature reached 1200°C, the volatilization of B2O3 caused many cracks and holes and weakened the protective effect of Nb2Zr6O17.
Disclosure statement
No potential conflict of interest was reported by the authors.