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THE REACTIVE SINTERING PROCESS


GEAMĂN VIRGIL, CRISTEA ION
"TRANSILVANIA" UNIVERSITY OF BRASOV, BACĂU UNIVERSITY

Issue:

MOCM, Number 4

Section:

Issue No. 4 (1998)

Abstract:

Reactive sintering has been utilized in this study to reduce open porosity and consequently improve corrosion properties of P/M stainless steel. Elemental Ni, Fe and Al powders have been added to standard 316L powder. Under carefully controlled conditions these powders react forming a transient liquid phase which fills pores. Microstructural analysis of the reactively sintered materials revealed no interconnected porosity with the pores which were still present being isolated and rounded. Differential thermal analysis shows that the reactive sintering process is initiated at the first Ni-Al eutectic which occurs at 640°C. Results indicate that reactive sintering is sensitive to process variables such as powder size, addition levels and mix homogeneity. This paper describes some of the mechanisms underlying the reactive sintering process.

Keywords:

[n/a]

Code [ID]:

MOCM199804V00S01A0019 [0000481]


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