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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 Abstract:
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. Keywords:
spark plasma sintering, ODS ferritic steel, mechanical alloying, Mössbauer spectroscopy, nanoindentation Affiliations:
| 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. | - | other affiliation | | Chmielewski M. | - | Institute of Electronic Materials Technology (PL) |
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| 2. |
Kaszyca K.♦, Marcin C.♦, Bucholc B., Błyskun P.♦, Nisar F., Rojek J., Zybała R.♦, Using the Spark Plasma Sintering System for Fabrication of Advanced Semiconductor Materials,
Materials, ISSN: 1996-1944, DOI: 10.3390/ma17061422, Vol.17, No.1422, pp.1-15, 2024Abstract:
The interest in the Spark Plasma Sintering (SPS) technique has continuously increased over the last few years. This article shows the possibility of the development of an SPS device used for material processing and synthesis in both scientific and industrial applications and aims to present manufacturing methods and the versatility of an SPS device, presenting examples of processing Arc-Melted- (half-Heusler, cobalt triantimonide) and Self-propagating High-temperature Synthesis (SHS)-synthesized semiconductor (bismuth telluride) materials. The SPS system functionality development is presented, the purpose of which was to broaden the knowledge of the nature of SPS processes. This approach enabled the precise design of material sintering processes and also contributed to increasing the repeatability and accuracy of sintering conditions. Keywords:
spark plasma sintering, arc melting, semiconductor materials, half-Heusler, bismuth telluride, cobalt triantimonide, SHS, SPS Affiliations:
| Kaszyca K. | - | Lukasiewicz Institute of Microelectronics and Photonics (PL) | | Marcin C. | - | other affiliation | | Bucholc B. | - | IPPT PAN | | Błyskun P. | - | other affiliation | | Nisar F. | - | IPPT PAN | | Rojek J. | - | IPPT PAN | | Zybała R. | - | Warsaw University of Technology (PL) |
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