CAJ | 학술논문

研究了未经/经常温腐蚀的DZ125镍基合金表面Al-Si涂层的高温氧化行为.结果表明,经腐蚀的涂层等温氧化行为发生变化.在初始阶段,经腐蚀的试样增重大于未经腐蚀的试样,而且经腐蚀的试样的耐高温性能明显下降.氧化皮中主要是Al2O3及少量的TiO2.
연구료미경/경상온부식적DZ125얼기합금표면Al-Si도층적고온양화행위.결과표명,경부식적도층등온양화행위발생변화.재초시계단,경부식적시양증중대우미경부식적시양,이차경부식적시양적내고온성능명현하강.양화피중주요시Al2O3급소량적TiO2.
The high-temperature oxidation behavior of Al-Si coatings on the Ni-base superalloy DZ125, with and without the ambient-temperature corrosion test, was investigated. The results show that the isothermal oxidation behavior of the corroded coating changes, which has the higher mass gain than that of the original coating during the initial oxidation stage. Moreover, the cyclic oxidation resistance of the corroded coating decreases severely. The oxide scale was primarily composed of Al2O3, contaminated with TiO2 that was due to the increase of Ti content after the room-temperature corrosion test.