Effect of upgraded field assisted sintering technology on microstructure of NiAl/CrB2 composites

• Autorzy: Szlezynger Maciej , Maj Łukasz , Pomorska Małgorzata , Morgiel Jerzy , Jach Katarzyna , Rosinski Marcin
• Języki publikacji: EN

Abstrakty

EN

The method of fabricating metal matrix composites plays a crucial role in obtaining dense materials characterized by high wear resistance. The present work describes an attempt to produce NiAl/CrB2 composites using the next generation spark plasma sintering (SPS) method, i.e. upgraded field assisted sintering technology (U-FAST) technique. Microstructure characterization was performed by means of scanning (SEM) and transmission (TEM) electron microscopy. The SEM microstructure investigations of the NiAl model material proved practically full densification of the material sintered at 1200°C and 1300°C, even if remnants of surplus nickel were observed at the boundaries of rounded NiAl grains. The NiAl/CrB2 composites, besides fused NiAl and CrB2 grains, showed the presence of a raised level of nickel also at the grain boundaries. The TEM microstructure observations helped to establish that even if the grain boundaries were pinned by nickel-rich precipitates, some increase in grain growth took place, as evidenced by the fact that strings of smaller precipitates were also visible outside the matrix grain boundaries. All these microstructure investigations indicate that the newly elaborated U-FAST technique is evidently capable of producing compacts free of porosity at lower temperatures and during a shorter time than solid hot pressing or vacuum sintering in a semiliquid state.

Słowa kluczowe

EN

metal matrix composites; SPS; microstructure; electron microscopy

• Wydawca: Polskie Towarzystwo Materiałów Kompozytowych
• Czasopismo: Composites Theory and Practice
• Rocznik: 2020
• Tom: R. 20, nr 1
• Strony: 7--10
• Opis fizyczny: Bibliogr. 6 poz., rys., tab.

Twórcy

autor

Szlezynger Maciej

• Institute of Metallurgy and Materials Science, Polish Academy of Sciences,ul. W. Reymonta 25, 30-059 Krakow, Poland

autor

Maj Łukasz

• Institute of Metallurgy and Materials Science, Polish Academy of Sciences,ul. W. Reymonta 25, 30-059 Krakow, Poland

autor

Pomorska Małgorzata

• Institute of Metallurgy and Materials Science, Polish Academy of Sciences,ul. W. Reymonta 25, 30-059 Krakow, Poland

autor

Morgiel Jerzy

• Institute of Metallurgy and Materials Science, Polish Academy of Sciences,ul. W. Reymonta 25, 30-059 Krakow, Poland

autor

Jach Katarzyna

• GeniCore, ul. Wólczyńska 133, 01-919 Warsaw, Poland

autor

Rosinski Marcin

• GeniCore, ul. Wólczyńska 133, 01-919 Warsaw, Poland

Bibliografia

• [1] Umansky P., Poliarus O., Ukrainets M., Martsenyuk I., Effect of ZrB2, CrB2 and TiB2 additives on the tribological characteristics of NiAl-Based gas-thermal coatings, Key Engineering Materials 2014, 604, 20-23.
• [2] Umanskyi P., Brodnikovskyi M.P., Ukrainets M.S., Poliarus O., Stelmakh O.U., Brodnikovskyi D.M., Effect of chromium diboride additives on strength properties of NiAl-CrB2 composites in a wide temperature range, Powder Metallurgy and Metal Ceramics 2018, 56, 681-687.
• [3] Poliarus O., Morgiel J., Umanskyi O., Szlezynger M., Pomorska M., Bobrowski P., M. Szczerba, Microstructure and phase composition of NiAl-CrB2 composite powders used for plasma spraying, Composites: Theory and Practice 2018, 18, 121-124.
• [4] Hebda M., Spark Plasma Sintering - Nowa technologia konsolidacji materiałów proszkowych (in Polish), Mechanika/Mechanics 2012, 109, 47-55.
• [5] Jach K., Rosiński M., Translucent aluminium oxide ceramics manufactured in U-FAST technology, Ceramic Materials 2018, 70, 4, 293-300.
• [6] Schembri J., Kaur S., Oskouei R.H., Rosinski M., Ghomashchi R., Rumian R., Understanding the potential of U-FAST sintering process an overview, Aspects in Mining and Mineral Science 2019, 3, 367-372.

Uwagi

Opracowanie rekordu ze środków MNiSW, umowa Nr 461252 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2020).