摘要
研究了近片层组织的γ-Ti Al合金在700℃高温状态下0~7 000 h过程中的氧化形貌变化。研究发现:经历了700℃、长达7 000 h氧化样品,氧化层的构成主要为Ti O2和Al2O3混合结构,而且成分的分布并不均匀,在Ti O2层中不连续地分布着富Al2O3相。氧化层形貌主要影响因素为Ti、Al、O的迁移速率以及扩散距离。
In this study,the surface oxidation microstructure of a high strength γ-Ti Al based near lamellar alloy has been studied with air exposure at 700 ℃ for 7 000 hours. The results show that the oxide scales of oxidized samples were mainly composed of Ti O2 and Al2 O3 which exposed to 700 ℃ for up to 7 000 h while the oxidation layer is heterogeneous in distribution. There is Al-enrichment zone in the oxide scales which discontinuous distributed among the TiO2 layer. The morphology of the oxide layer is mainly controlled by the migration rate and diffusion distance of Ti,Al and O elements.
作者
孙才
罗虓
冯玮
曹婷婷
易义凤
SUN Cai;LUO Xiao;FENG Wei;CAO Ting-ting;YI Yi-feng(AECC Shenyang Liming Aero-engine Co.,Ltd.,Shenyang 110043,China)
出处
《湖南有色金属》
CAS
2018年第6期46-48,63,共4页
Hunan Nonferrous Metals
关键词
热处理
Γ-TIAL合金
显微组织
氧化
heat treatment
gamma titanium aluminides
microstructure
oxidation