High temperature oxidation resistance of TiAl alloys by plasma based ion implantation

2003 ◽  
Author(s):  
T. Ishii ◽  
K. Murakami ◽  
K. Fujita ◽  
Y. Hibino
Keyword(s):  
High Temperature ◽  
Ion Implantation ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Temperature Oxidation ◽  
Tial Alloys

Comparison of Fluorination Treatments to Improve the High Temperature Oxidation Resistance of TiAl Alloys in SO2 Containing Environments

2010 ◽  
Vol 638-642 ◽  
pp. 1374-1378 ◽  
Author(s):  
Patrick J. Masset ◽  
Rossen Yankov ◽  
Andreas Kolitsch ◽  
Michael Schütze
Keyword(s):  
High Temperature ◽  
Sulfur Dioxide ◽  
Ion Implantation ◽  
Oxide Scale ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Titanium Aluminides ◽  
Temperature Oxidation ◽  
Tial Alloys ◽  
Plasma Immersion Ion Implantation

Surfaces of titanium aluminides were treated by fluorine either physically using Plasma Immersion Ion Implantation (PI³) or chemically with a F-based polymer. By controlling the fluorination parameters, both treatments improve the oxidation resistance even in the presence of sulfur dioxide (0.1 vol%). No sulfur was detected in the oxide scale although thermodynamic calculations predict the formation of sulfides. The inward diffusion of oxygen and nitrogen in the alloy was found to be reduced in the presence of SO2.

AlN formation and enhancement of high-temperature oxidation resistance by plasma-based ion implantation

2003 ◽  
Vol 169-170 ◽  
pp. 359-362 ◽  
Author(s):  
Yoshihito Hara ◽  
Tetsuji Yamanishi ◽  
Kingo Azuma ◽  
Hitoshi Uchida ◽  
Mitsuyasu Yatsuzuka
Keyword(s):  
High Temperature ◽  
Ion Implantation ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Temperature Oxidation

scholarly journals AlN Formation and Improvement of High-Temperature Oxidation Resistance by Plasma-Based Ion Implantation

2000 ◽  
Vol 120 (12) ◽  
pp. 1121-1122
Author(s):  
Yoshihito Hara ◽  
Tetsuji Yamanishi ◽  
Kingo Azuma ◽  
Etsuo Fujiwara ◽  
Hitoshi Uchida ◽  
...  
Keyword(s):  
High Temperature ◽  
Ion Implantation ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Temperature Oxidation

Optimization of the Fluorine Effect for Improving the Oxidation Resistance of Tial-Alloys

2012 ◽  
Vol 706-709 ◽  
pp. 1061-1065 ◽  
Author(s):  
Alexander Donchev ◽  
Michael Schütze ◽  
Andreas Kolitsch ◽  
Rossen Yankov
Keyword(s):  
High Temperature ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Inorganic Compounds ◽  
Oxidation Mechanism ◽  
Surface Region ◽  
Alumina Scale ◽  
Temperature Oxidation ◽  
Bulk Properties ◽  
Tial Alloys

The oxidation resistance of TiAl-alloys can be improved drastically by treating the surface of the components with small amounts of fluorine. The oxidation mechanism is changed. Hence, the formation of a fast growing mixed oxide scale on untreated alloys is suppressed. Instead a thin protective alumina scale is formed on samples after fluorine treatment. The different methods only influence the surface region of the components so that the bulk properties are not affected. Recent results achieved with F-containing inorganic compounds showed that the fluorine effect can be improved even further. TiAl-specimens were treated only with fluorine and with F-containing compounds in several ways and their performance during high temperature oxidation tests in air was investigated. Results of isothermal and thermocyclic oxidation tests are presented. The results are discussed in terms of a later use of the fluorine effect for technical applications.

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