Heat treatment effects on self-assembling process of supersaturated thermal vacancies in B2-type FeAl and NiAl

Masafumi Tsunekane; Kyosuke Yoshimi; Kouichi Maruyama

Heat treatment effects on self-assembling process of supersaturated thermal vacancies in B2-type FeAl and NiAl

Masafumi Tsunekane, Kyosuke Yoshimi, Kouichi Maruyama

ENG - Materials Science

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

A large number of thermal vacancies are frozen into B2-type aluminides in supersaturation by rapid cooling. In this paper, the self-assembling behavior of supersaturated thermal vacancies in FeAl and NiAl was investigated using single crystals by different scanning calorimetry (DSC) and transmission electron microscopy (TEM). Two irreversible exothermic peaks were observed in the DSC curve of FeAl single crystals quenched from high temperature. The density and arrangement of dislocations formed inside the FeAl single crystals varied widely in the temperature range corresponding to the larger exothermic reaction, and the size of pores formed near surfaces increased with increasing temperature. An irreversible exothermic peak was also observed in the DSC curve of NiAl single crystal. The density and arrangement of dislocations formed inside the NiAl single crystals hardly varied in the temperature range corresponding to the exothermic reaction, but the size of pores formed near surfaces increased with increasing temperature.

Original language	English
Title of host publication	Proceedings of the 17th IFHTSE Congress
Publisher	The Japan Society for Heat Treatment (JSHT)
Pages	292-295
Number of pages	4
ISBN (Electronic)	9780000000002
Publication status	Published - 2009 Jan 1
Event	17th International Federation for Heat Treatment and Surface Engineering Congress 2008, IFHTSE 2008 - Kobe, Japan Duration: 2008 Oct 26 → 2008 Oct 28

Publication series

Name	Proceedings of the 17th IFHTSE Congress
Volume	1

Other

Other	17th International Federation for Heat Treatment and Surface Engineering Congress 2008, IFHTSE 2008
Country	Japan
City	Kobe
Period	08/10/26 → 08/10/28

Keywords

B2-type aluminides
Differential scanning calorimetry (DSC)
Point defects
Transmission electron microscopy (TEM)
Vacancies

ASJC Scopus subject areas

Surfaces, Coatings and Films
Condensed Matter Physics
Mechanics of Materials

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Heat treatment effects on self-assembling process of supersaturated thermal vacancies in B2-type FeAl and NiAl. / Tsunekane, Masafumi; Yoshimi, Kyosuke; Maruyama, Kouichi.

Proceedings of the 17th IFHTSE Congress. The Japan Society for Heat Treatment (JSHT), 2009. p. 292-295 (Proceedings of the 17th IFHTSE Congress; Vol. 1).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Tsunekane, M, Yoshimi, K & Maruyama, K 2009, Heat treatment effects on self-assembling process of supersaturated thermal vacancies in B2-type FeAl and NiAl. in Proceedings of the 17th IFHTSE Congress. Proceedings of the 17th IFHTSE Congress, vol. 1, The Japan Society for Heat Treatment (JSHT), pp. 292-295, 17th International Federation for Heat Treatment and Surface Engineering Congress 2008, IFHTSE 2008, Kobe, Japan, 08/10/26.

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title = "Heat treatment effects on self-assembling process of supersaturated thermal vacancies in B2-type FeAl and NiAl",

abstract = "A large number of thermal vacancies are frozen into B2-type aluminides in supersaturation by rapid cooling. In this paper, the self-assembling behavior of supersaturated thermal vacancies in FeAl and NiAl was investigated using single crystals by different scanning calorimetry (DSC) and transmission electron microscopy (TEM). Two irreversible exothermic peaks were observed in the DSC curve of FeAl single crystals quenched from high temperature. The density and arrangement of dislocations formed inside the FeAl single crystals varied widely in the temperature range corresponding to the larger exothermic reaction, and the size of pores formed near surfaces increased with increasing temperature. An irreversible exothermic peak was also observed in the DSC curve of NiAl single crystal. The density and arrangement of dislocations formed inside the NiAl single crystals hardly varied in the temperature range corresponding to the exothermic reaction, but the size of pores formed near surfaces increased with increasing temperature.",

keywords = "B2-type aluminides, Differential scanning calorimetry (DSC), Point defects, Transmission electron microscopy (TEM), Vacancies",

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AU - Tsunekane, Masafumi

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N2 - A large number of thermal vacancies are frozen into B2-type aluminides in supersaturation by rapid cooling. In this paper, the self-assembling behavior of supersaturated thermal vacancies in FeAl and NiAl was investigated using single crystals by different scanning calorimetry (DSC) and transmission electron microscopy (TEM). Two irreversible exothermic peaks were observed in the DSC curve of FeAl single crystals quenched from high temperature. The density and arrangement of dislocations formed inside the FeAl single crystals varied widely in the temperature range corresponding to the larger exothermic reaction, and the size of pores formed near surfaces increased with increasing temperature. An irreversible exothermic peak was also observed in the DSC curve of NiAl single crystal. The density and arrangement of dislocations formed inside the NiAl single crystals hardly varied in the temperature range corresponding to the exothermic reaction, but the size of pores formed near surfaces increased with increasing temperature.

AB - A large number of thermal vacancies are frozen into B2-type aluminides in supersaturation by rapid cooling. In this paper, the self-assembling behavior of supersaturated thermal vacancies in FeAl and NiAl was investigated using single crystals by different scanning calorimetry (DSC) and transmission electron microscopy (TEM). Two irreversible exothermic peaks were observed in the DSC curve of FeAl single crystals quenched from high temperature. The density and arrangement of dislocations formed inside the FeAl single crystals varied widely in the temperature range corresponding to the larger exothermic reaction, and the size of pores formed near surfaces increased with increasing temperature. An irreversible exothermic peak was also observed in the DSC curve of NiAl single crystal. The density and arrangement of dislocations formed inside the NiAl single crystals hardly varied in the temperature range corresponding to the exothermic reaction, but the size of pores formed near surfaces increased with increasing temperature.

KW - B2-type aluminides

KW - Differential scanning calorimetry (DSC)

KW - Point defects

KW - Transmission electron microscopy (TEM)

KW - Vacancies

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