摘要
本文研究了一种镍基高温合金K38G的微晶涂层上保护性氧化膜的修复性。结果表明,溅射微晶涂层上的氧化膜有优良的修复性,氧化膜剥落后,涂层仍具有优良的抗高温氧化性能。氧化膜局部小范围剥落后,表面仍能生成单一的Al_2O_3,氧化膜。氧化膜大面积剥落后,虽然生成由(Al、Cr)_2O_3与TiO_2组成的复合外氧化膜,但它具有优良的防护性和粘附性。
The healing performances of the protective oxide scales on mierocrystalline coatings of Ni-base superalloy K38G has been studied. The results indicated that the oxide scales on the mierocrystalline coatings may be healed when the original scales are destroyed, and the coatings still have excellent resistances against high temperature oxidation. When the original Al_2O_3 oxide scales are spalled on a small zone, external scales of Al_2O_3 can be formed on the surface. However, when the oxide scales are destroyed on a great zone, mixed oxide scales of (Al,Cr)_2O_3 and TiO_2 can be formed on the surface. The mixed scales are very protective and adherent.
出处
《腐蚀科学与防护技术》
CAS
CSCD
1993年第3期203-208,共6页
Corrosion Science and Protection Technology
基金
国家自然科学基金
关键词
微晶涂层
氧化膜
修复
耐热合金
microcrystalline coating
oxidation
superalloy
healing of oxide scales
