The role of Re in improving the oxidation-resistance of a Re modified PtAl coating on Mo-rich single crystal superalloy

2020 ◽  
Vol 58 ◽  
pp. 63-72 ◽  
Author(s):  
Jingchen Li ◽  
Liangliang Wei ◽  
Jian He ◽  
Hao Chen ◽  
Hongbo Guo
Keyword(s):  
Single Crystal ◽  
Oxidation Resistance ◽  
Single Crystal Superalloy

Effect of Hf Content on Oxidation Resistance of Single Crystal Superalloy at 1000°C

2014 ◽  
Vol 915-916 ◽  
pp. 562-566 ◽  
Author(s):  
Z.X. Shi ◽  
Shi Zhong Liu ◽  
M. Han ◽  
J.R. Li
Keyword(s):  
Grain Size ◽  
Single Crystal ◽  
Oxide Scale ◽  
Oxide Layer ◽  
Oxidation Resistance ◽  
Isothermal Oxidation ◽  
Single Crystal Superalloy ◽  
Ambient Atmosphere ◽  
Directionally Solidified ◽  
Better Than

The specimens of single crystal superalloy DD6 with 0.10% Hf and 0.47% Hf were prepared in the directionally solidified furnace. The effect of Hf content on the isothermal oxidation resistance of the second generation single crystal superalloy DD6 was studied at 1000°Cin ambient atmosphere. Morphology of oxides was examined by SEM, and their composition was analyzed by XRD and EDS. The experimental results show that the oxidation resistance of DD6 alloy with 0.47% Hf is better than that of the alloy with 0.10% Hf. The alloy with different Hf content all obeys parabolic rate law during oxidation for 100h at 1000°C. The increase of Hf content can promote the Al2O3 formation and decreases the proportion of NiO. The oxide grain size and the thickness of the oxide layer all reduce with increasing of Hf content. The oxide scale of the alloy with different Hf content is made up of an outer NiO layer with a small amount of Co3O4, inner Al2O3 and Cr2O3 layer with a small amount of TaO2.

Oxidation Resistance Improvement of Ni-Base Single-Crystal Superalloy Melted in a CaO Crucible

2019 ◽  
Vol 50 (8) ◽  
pp. 3903-3911 ◽  
Author(s):  
Takuya Sugiyama ◽  
Satoshi Utada ◽  
Tadaharu Yokokawa ◽  
Makoto Osawa ◽  
Kyoko Kawagishi ◽  
...  
Keyword(s):  
Single Crystal ◽  
Oxidation Resistance ◽  
Single Crystal Superalloy ◽  
Resistance Improvement

Role of tantalum in the hot corrosion of a Ni-base single crystal superalloy

2015 ◽  
Vol 98 ◽  
pp. 585-591 ◽  
Author(s):  
J.X. Chang ◽  
D. Wang ◽  
T. Liu ◽  
G. Zhang ◽  
L.H. Lou ◽  
...  
Keyword(s):  
Single Crystal ◽  
Hot Corrosion ◽  
Single Crystal Superalloy

Role of Ru in a new phase formation in an Ni-base single crystal superalloy with high Cr content

2015 ◽  
Vol 641 ◽  
pp. 228-233 ◽  
Author(s):  
T.Z. Xin ◽  
S. Tang ◽  
F. Ji ◽  
L.K. Ning ◽  
Z. Zheng
Keyword(s):  
Single Crystal ◽  
Phase Formation ◽  
Single Crystal Superalloy ◽  
Cr Content ◽  
New Phase
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