Fabrication of Pt modified aluminide diffusion coatings on Ti6Al4V alloy and their oxidation behaviors

被引：0
作者：
Ye, Liya [1 ,2 ]
Chen, Hongfei [1 ]
Yang, Guang [1 ]
Gao, Yanfeng [1 ]
机构：
[1] Shanghai Univ, Sch Mat Sci & Engn, 99 Shangda Rd, Shanghai 200444, Peoples R China
[2] Shanghai Space Appliance Co Ltd, 2891 Qilianshan South Rd, Shanghai 200331, Peoples R China
来源：
MATERIALS LETTERS | 2024年 / 370卷
基金：
中国国家自然科学基金;
关键词：
Chemical vapour deposition; Thick films; Oxidation; GAMMA; TITANIUM;
D O I：
10.1016/j.matlet.2024.136834
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
PtAl 2 + TiAl 3 , beta- (Ni,Pt)Al + TiAl 3 and beta- (Ni,Pt)Al + PtAl 2 + TiAl 3 coatings were prepared on Ti6Al4V alloy substrates by pre -depositing a Ni/Pt layer prior to aluminizing. It was found that a single pre -deposited Pt layer tended to form PtAl 2 phase and a Ni + Pt layer favored to form beta- (Ni,Pt)Al phase during aluminizing. After thermal cycling, the PtAl 2 + TiAl 3 coating formed a dense Al 2 O 3 scale and showed least weight gain and thickness increase. For the beta- type coatings, their oxidation product contained porous TiO 2 . The results indicate that the PtAl 2 + TiAl 3 coating could block the out -diffusion and oxidation of Ti.
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页数：4
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