Oxidation behaviors of TA15 titanium alloy and TiBw reinforced TA15 matrix composites prepared by spark plasma sintering

Dongjun Wang^1,2，Hao Li²，Wei Zheng³

1. National Key Laboratory for Precision Hot Processing of Metals, Harbin Institute of Technology2. School of Materials Science and Engineering, Harbin Institute of Technology3. Xi’an Space Engine Company Limited

摘 要：The purpose of this study is to investigate the oxidation behaviors of the TA15 titanium alloy and TiBw/TA15 composite with network microstructure in the temperature range of 873–1073 K. The results show that the oxidation kinetics of the TA15 titanium alloy and TiBw/TA15 composite follows different laws at various oxidation temperatures. Moreover, the effective activation energy Q for oxidation of the TA15 titanium alloy and TiBw/TA15 composite is determined to be 299 ± 19.9 kJ/mol and 339 ± 8.31 kJ/mol at the temperature of 973–1073 K, respectively. The experimental achievements of oxidation kinetics and oxide scales formed in the test temperatures indicate that the TiBw/TA15 composite exhibits a higher oxidation resistance than TA15 titanium alloy. A schematic diagram of oxidation mechanism is established to further reveal the oxidation process for TiBw/TA15 composite at elevated temperatures.

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