Effect of heating rate on the synthesis of nickel aluminides by reactive sintering.

• Autorzy: Gialanella, S. , Pieczonka, T. , Molinari, A. , Kazior, J.
• Konferencja: AMT'98 XVth Physical Metallurgy and Materials Science Conference 'Advanced materials & technologies' 17-21 May, 1998, Kraków-Krynica, Poland.
• Języki publikacji: EN

Abstrakty

EN

Dimensional changes occuring during reactive sintering of three different elemental nickel - aluminium powder mixtures were investigated. Sintering process of powder compacts was curried out under vacuum in a horizontal dilatometer at a various heating rates. The synthesis reaction proceeded with a sudden release of heat and sudden dimensional changes, corresponding to the appearance of liquid phase in the system. Heating rate is a crucial parameter affecting the dominant sintering mechanisms: both extensive shrinkage as well as extensive swelling were observed for each investigated mixture composition depending on the actual heating rate. At slower heating rate the synthesis reactions were initiated and developed between solid powders of nickel and aluminium. In these cases, owing to the limited amount of liquid phase which developed, a swelling of compacts was observed. However, at the higher heating rate solid state reactions were limited and after transient swelling also shrinkage was observed.

Słowa kluczowe

PL

wypraska proszkowa; nikiel; aluminium; spiekanie; mieszanina; dylatometr; synteza

EN

powder compact; nickel; aluminium; sintering; mixture; dilatometer; synthesis

• Czasopismo: Inżynieria Materiałowa
• Rocznik: 1998
• Tom: R. XIX, nr 4
• Strony: 909-912
• Opis fizyczny: Bibliogr. 7 poz., tab., rys.

Twórcy

autor

Gialanella, S.

• University of Trento, Department of Materials Engineering, Trento, Italy

autor

Pieczonka, T.

• University of Mining and Metallurgy, Department of Metallurgy and Materials Engineering, Krakow, Poland

autor

Molinari, A.

• University of Trento, Department of Materials Engineering, Trento, Italy

autor

Kazior, J.

• Cracow University of Technology, Institute of Material Science and Technology, Krakow, Poland

• University of Trento, Departament of Materials Engineering

Bibliografia

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