scholarly journals Improvement of Oxidation Resistance for TiAl by Surface Treatment under a Low Partial Pressure Oxygen Atmosphere and Aluminum Diffusion Coating.

1991 ◽  
Vol 31 (10) ◽  
pp. 1201-1206 ◽  
Author(s):  
Michiko Yoshihara ◽  
Tetsuya Suzuki ◽  
Ryohei Tanaka
Keyword(s):  
Partial Pressure ◽  
Surface Treatment ◽  
Oxidation Resistance ◽  
Diffusion Coating ◽  
Oxygen Atmosphere ◽  
Pressure Oxygen

Development of Surface Treatment Techniques to Improve Oxidation Resistance of Titanium Aluminide

1990 ◽  
Vol 213 ◽  
Author(s):  
Michiko Yoshihara ◽  
Ryohei Tanaka ◽  
Tetuya Suzuki ◽  
Masayuki Shimizu
Keyword(s):  
Heat Treatment ◽  
Partial Pressure ◽  
Surface Treatment ◽  
Oxidation Resistance ◽  
Titanium Aluminide ◽  
Combined Treatment ◽  
Diffusion Coating ◽  
Oxygen Atmosphere ◽  
Preferential Formation ◽  
Pressure Oxygen

ABSTRACTThe oxidation resistance of intermetallic compound TiAl was greatly improved in cyclic heating at 900°C by means of a new type of surface treatment, which is the heat treatment under a low partial pressure oxygen atmosphere. The treatment becomes more effective with increasing aluminum content in the specimen. It was presumed that the excellent oxidation resistance resulting from this method is due to preferential formation of a thin and tighit Al2 O3 surface layer, which is formed during the surface treatment at a temperature vicinity of 1000°C and air pressure of about 10−3 Pa. The oxidation resistance of Al2O3 film formed, however, was found to be insufficient at 950°C. A combined treatment consisting of the heat treatment under a low partial pressure oxygen atmosphere followed by a diffusion coating with aluminum showed an excellent resistance to cyclic oxidation even at 950°C.

Effect of Surface Treatment on the Formation of Oxygen Enriched Brittle Layer in A Ti3A1-Nb Alloy

1994 ◽  
Vol 364 ◽  
Author(s):  
B. Zhang ◽  
X. Wan ◽  
D. Li ◽  
J. Wang ◽  
H. Wang ◽  
...  
Keyword(s):  
Titanium Nitride ◽  
Partial Pressure ◽  
Surface Treatment ◽  
Thermal Exposure ◽  
Nitride Layer ◽  
Oxygen Atmosphere ◽  
Pressure Oxygen ◽  
Brittle Layer ◽  
Vapor Deposit ◽  
Effect Of Surface

AbstractEffect of surface treatment on the formation of oxygen enriched brittle layer in a Ti3Al-Nb alloy was investigated. The results show that a mixed Ti2N and TiN layer was formed at the surface by the titanium nitride vapor deposit treatment, and this titanium nitride layer makes it possible to suppress the formation of the oxygen enriched brittle layer during thermal exposure. An Al2O3 film was formed at the surface of the alloy, when the surface treatment was conducted under a low partial pressure oxygen atmosphere. However, such surface treatment is not able to depress the formation of the oxygen enriched brittle layer during thermal exposure, due to the higher affinity of α2 phase for oxygen as well as the higher diffusivity of titanium in Al2O3.

RA 600

Alloy Digest ◽  
1967 ◽  
Vol 16 (1) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Oxidation Resistance ◽  
Heat Treating ◽  
Chromium Alloy ◽  
Good Resistance ◽  
Good Oxidation Resistance ◽  
Nickel Base

Abstract RA-600 is a nickel-base chromium alloy having good oxidation resistance to 2150 F, and good resistance to carburizing and nitriding atmospheres. It is recommended for furnace construction and equipment. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties as well as creep. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-120. Producer or source: Rolled Alloys Inc..

Structure and oxidation resistance of a slurry-diffusion coating on niobium

1981 ◽  
Vol 20 (11) ◽  
pp. 801-804
Author(s):  
M. S. Tsirlin ◽  
G. M. Anurova ◽  
A. D. Aliev
Keyword(s):  
Oxidation Resistance ◽  
Diffusion Coating
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