Defect structure of Fe-Al and Fe-Al-X (X = Ni; Cu; Cr) metallic powders obtained by the self-decomposition method

• Autorzy: Hanc A. , Frąckowiak J.
• Konferencja: Proceedings of the All-Polish Seminar on Mössbauer Spectroscopy OSSM'04
• Języki publikacji: EN

Abstrakty

EN

In the present work, the Fe-Al-X (X = Cu; Ni; Cr) metallic powders produced by the self-decomposition method of the Fe-Al doped alloys were examined by Mössbauer spectroscopy. The concentration of the Fe vacancies and the Fe atoms substituting Al (Fe-AS) was determined from the intensities of the sub-spectra in the Mössbauer analysis connected with distinct Fe environments. The results have shown that nickel and copper cause an increase of vacancy concentrations in comparison with the values found for Fe-Al metallic powders, whereas chromium decreases vacancy concentrations causing a significant increase of anti-site atoms Fe-AS concentration.

Słowa kluczowe

EN

iron aluminides; defects; points defects; Mössbauer spectroscopy; Fe-Al

• Wydawca: Institute of Nuclear Chemistry and Technology
• Czasopismo: Nukleonika
• Rocznik: 2004
• Tom: Vol. 49,suppl.3
• Strony: 7--11
• Opis fizyczny: Bibliogr. 12 poz., rys.

Twórcy

autor

Hanc A.

• Institute of Materials Science, University of Silesia, 12 Bankowa Str., 40-007 Katowice, Poland, Tel.: [phone], Fax: [phone]

autor

Frąckowiak J.

• Institute of Materials Science, University of Silesia, 12 Bankowa Str., 40-007 Katowice, Poland, Tel.: [phone], Fax: [phone]

Bibliografia

• 1. Baker I, Munroe PR (1990) High-temperature aluminides and intermetallics. In: Whang SH, Liu CT, Pope DP, Stiegler JD (eds) Proc of the Symp on High Temperature Aluminides and Intermetallics, 1−5 October 1989, Indianapolis, USA. The Materials Society, Warrendale, PA, pp 95−114
• 2. Binczyk F (1989) The factors which determine the structure of the Fe-Al-C alloys with high content of aluminium and the analysis of the phenomena leading to their self-decomposition. Inżynieria Materiałowa 4:51−57 (in Polish)
• 3. Bogner J, Steiner W, Reissner M et al. (1998) Magnetic order and defect structure of FexA1−x alloys around x = 0.5: An experimental and theoretical study. Phys Rev B 58;22:14922−14933
• 4. Gianella S, Brua RS, Deng W, Marino F, Spataru T, Principi G (2001) Defect structures in FeAl B2 alloys. J Alloys Compd 317/318:485−490
• 5. Hanc A, Dercz G, Frąckowiak JE, Pająk L, Binczyk F (2004) Structural studies on metallic powders from Fe-Al and FeAl-X (X = Cu; Ni; Cr) systems obtained by self-decomposition method. In: Morawiec H, Stróż D (eds) Proc of the XIX Conf on Applied Crystallography, 3−7 September 2003, Kraków, Poland, pp 312−316
• 6. Hillert M, Selleby M (2001) Point defects in B2 compounds. J Alloys Compd 329:208−213
• 7. Jordan JL, Deevi SC (2003) Vacancy formation and effects in FeAl. Intermetallics 11:507−528
• 8. Kogachi M, Haraguchi T, Kim SM (1998) Point defect behavior in high temperature region in the B2-type intermetallic compound FeAl. Intermetallics 6:499−510
• 9. McKamey CG (1996) Iron aluminides. In: Stoloff NS, Sikka VK (eds) Physical metallurgy and processing of intermetallic compounds. Chapman & Hall, New York, chapter 9, pp 351−392
• 10. Michalecki T, Deniszczyk J, Frąckowiak JE (2004) First principles study of the isomer shift in Fe44M6Al50 (M = Ti,V, Cr, Co, Ni, Cu) alloys with B2 structure. Nukleonika 49;S3:s3−s6
• 11. Ralston A (1975) A first course in numerical analysis. McGraw-Hill Book Co., London
• 12. Ren X, Otsuka K (2000) A unified model for point-defect formation in B2 intermetallic compounds. Philos Mag A 80:467−491