The relationship between specific heat capacity and oxidation resistance of TiAl alloys

• Autorzy: Przeliorz R. , Goral M. , Moskal G. , Swadzba L.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The results of the measuring of the specific heat capacity of the TiAl-based alloys with the addition of Cr and Nb, in temperatures ranging from 150 to 1000 degrees centigrade. Design/methodology/approach: The measurements of the specific heat capacity have been conducted using differential scanning calorimetry method (DSC) on Setaram calorimeter. The samples, sized 15 x 9 x 1,1 mm, have been oxidized in varied thermal conditions, according to the following scheme: 2 min. of heating up to 950 degrees centigrade, 50 min. of annealing at the given temperature, 8 min. of cooling until room temperature (25 degrees centigrade) was reached. Findings: The heat resistance of the alloys under the conditions of cyclic oxidation in 950 degrees centigrade has been specified. Up to 800 degrees centigrade, the course of the cp curves agrees with Debaye model. Above 800 degrees centigrade, an anomaly, involving the fast increase of the cp value, can be noticed. Research limitations/imlications: Results of investigation can explain relationship between specific heat capacity and oxidation resistance of different TiAl alloy. Originality/value: The presence of the Nb2O5 phase in the scale has been proved to spur the increase of the oxidation process.

Słowa kluczowe

EN

corrosion; oxidation resistance; specific heat capacity; intermetallics; TiAl

PL

korozja; odporność na utlenianie; warunki termiczne; związki międzymetaliczne; Ti-Al

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2007
• Tom: Vol. 21, nr 1
• Strony: 47--50
• Opis fizyczny: Bibliogr. 17 poz., fot., rys., tab.

Twórcy

autor

Przeliorz R.

autor

Goral M.

autor

Moskal G.

autor

Swadzba L.

• Department of Materials Science, Silesian University of Technology, ul. Krasinskiego 8, 40-019 Katowice, Poland,

Bibliografia

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