摘要
采用爆炸喷涂在Ti2 2Al2 6Nb基体上制备了富Al的NiAl合金涂层。XRD分析表明 ,退火后涂层为富含Al的 β-NiAl相以及少量的Al3 Ti和Al3 Nb .在空气中 80 0℃下的循环氧化实验表明 ,这种富含Al的NiAl涂层抗氧化性能很好 .循环氧化过程中没发现涂层剥落 ,氧化动力学曲线为抛物线型 .
Al rich NiAl coatings were prepared on an orthorhombic alloy Ti22Al26Nb(atomic fraction,%)by Detonation gun spraying(DS).After annealing,the Ni-Al coatings have a good adherence with the substrate,and XRD shows that the coatings mainly composed of β-NiAl and minor of Al 3Ti and Al 3Nb.The cycled thermal cyclic oxidation test in static air at 800℃ shows that the Al rich coatings improve the high temperature resistance greatly.The reasons of the improved high temperature resistance are given.
出处
《腐蚀科学与防护技术》
CAS
CSCD
北大核心
2005年第1期24-26,共3页
Corrosion Science and Protection Technology
基金
中国自然科学基金项目 (KGCX2 -2 12 -0 2)
