Instytut Podstawowych Problemów Techniki
Polskiej Akademii Nauk


A Malinowska

Ostatnie publikacje
1.  Strojny-Nędza A., Pietrzak K. Z., Jóźwik I., Bucholc B., Wyszkowska E., Kurpaska Ł., Grabias A., Malinowska A., Chmielewski M., Effect of Nitrogen Atmosphere Annealing of Alloyed Powders on the Microstructure and Properties of ODS Ferritic Steels, Materials, ISSN: 1996-1944, DOI: 10.3390/ma17081743, Vol.17, No.8, pp.1-19, 2024

Oxide Dispersion Strengthened (ODS) ferritic steels are promising materials for the nuclear power sector. This paper presents the results of a study on the sintering process using the Spark Plasma Sintering (SPS) technique, focusing on ODS ferritic steel powders with different contents (0.3 and 0.6 vol.%) of Y2O3. The novelty lies in the analysis of the effect of pre-annealing treatment on powders previously prepared by mechanical alloying on the microstructure, mechanical, and thermal properties of the sinters. Using the SPS method, it was possible to obtain well-densified sinters with a relative density above 98%. Pre-annealing the powders resulted in an increase in the relative density of the sinters and a slight increase in their thermal conductivity. The use of low electron energies during SEM analysis allowed for a fairly good visualization of the reinforcing oxides uniformly dispersed in the matrix. Analysis of the Mössbauer spectroscopy results revealed that pre-annealing induces local atomic rearrangements within the solid solution. In addition, there was an additional spectral component, indicating the formation of a Cr-based paramagnetic phase. The ODS material with a higher Y2O3 content showed increased Vickers hardness values, as well as increased Young’s modulus and nanohardness, as determined by nanoindentation tests.

Słowa kluczowe:
spark plasma sintering, ODS ferritic steel, mechanical alloying, Mössbauer spectroscopy, nanoindentation

Afiliacje autorów:
Strojny-Nędza A. - Institute of Electronic Materials Technology (PL)
Pietrzak K. Z. - IPPT PAN
Jóźwik I. - Institute of Electronic Materials Technology (PL)
Bucholc B. - IPPT PAN
Wyszkowska E. - National Centre for Nuclear Research (PL)
Kurpaska Ł. - National Centre for Nuclear Research (PL)
Grabias A. - Lukasiewicz Institute of Microelectronics and Photonics (PL)
Malinowska A. - inna afiliacja
Chmielewski M. - Institute of Electronic Materials Technology (PL)

Kategoria A Plus


logo ippt            ul. Pawińskiego 5B, 02-106 Warszawa
  +48 22 826 12 81 (centrala)
  +48 22 826 98 15

Znajdź nas

© Instytut Podstawowych Problemów Techniki Polskiej Akademii Nauk 2024