Disruption of an Alumina Layer During Sintering of Aluminium in Nitrogen

• Autorzy: Pieczonka T.

Identyfikatory

DOI

10.1515/amm-2017-0139

• Języki publikacji: EN

Abstrakty

EN

Aluminium oxide layer on aluminium particles cannot be avoided. However, to make the metal-metal contacts possible, this sintering barrier has to be overcome in some way, necessarily to form sintering necks and their development. It is postulated that the disruption of alumina layer under sintering conditions may originate physically and chemically. Additionally, to sinter successfully non alloyed aluminium powder in nitrogen, the operation of both types mechanism is required. It is to be noted that metallic aluminium surface has to be available to initiate reactions between aluminium and the sintering atmosphere, i.e. mechanical disruption of alumina film precedes the chemical reactions, and only then chemically induced mechanisms may develop. Dilatometry, gravimetric and differential thermal analyses, and microstructure investigations were used to study the sintering response of aluminium at 620°C in nitrogen, which is the only sintering atmosphere producing shrinkage.

Słowa kluczowe

EN

aluminium; sintering; alumina layers; nitrogen atmosphere

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2017
• Tom: Vol. 62, iss. 2B
• Strony: 987--992
• Opis fizyczny: Bibliogr. 38 poz., rys., tab.

Twórcy

autor

Pieczonka T.

• AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Kraków, Poland

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).