Oxidation Behavior of TiAl-Based Alloy Modified by Double-Glow Plasma Surface Alloying with Cr-Mo

Affiliation of Author(s):材料科学与技术学院

Journal:HIGH TEMPERATURE MATERIALS AND PROCESSES

Key Words:TiAl Cr-Mo double-glow plasma surface oxidation

Abstract:A Cr-Mo alloyed layer was prepared on a TiAl-based alloy using plasma surface alloying technique. The isothermal oxidation kinetics of the untreated and treated samples was examined at 850 degrees C. The microstructure and phase composition of the alloyed layer were analyzed by scanning electron microscope (SEM), energy dispersive spectrometer (EDS) and X-ray powder diffraction (XRD). The morphology and constituent of the oxide scales were also analyzed. The results indicated that the oxidation resistance of TiAl was improved significantly after the alloying treatment. The oxide scale eventually became a mixture of Al2O3, Cr2O3 and TiO2. The oxide scale was dense and integrated throughout the oxidation process. The improvement was mainly owing to the enhancing of scale adhesion and the preferential oxidation of aluminum brought by the alloying effect for TiAl-based alloy.

ISSN No.:0334-6455

Translation or Not:no

Date of Publication:2017-08-01

Co-author:Wei, Xiangfei,Wang, Qiong,Wei Dongbo,Chen, Xiaohu

Correspondence Author:Wei, Xiangfei,Zhang Pingze

Date of Publication:2017-08-01