On the reactive sintering of Heusler Fe2VAl-based thermoelectric compounds

Rest, Camille van der; Dupont, Vedi; Erauw, Jean‐Pierre; Jacques, Pascal

doi:10.1016/j.intermet.2020.106890

Cited by 6 publications

(2 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Moreover, preliminary activated powders can be used not only for combustion synthesis, but also for reaction sintering, which is based on the idea of simultaneous synthesis and compaction of the material. This method produces a wide range of materials: composites [ 27 , 28 , 29 , 30 ], thermoelectrics [ 31 , 32 , 33 , 34 ], and ceramics [ 35 , 36 , 37 ], including high-entropy ones [ 38 , 39 , 40 , 41 ]. The implementation of this method is typically carried out on hot pressing (HP) and spark plasma sintering (SPS) devices and referred to as RHP and RSPS, respectively [ 42 ].…”

Section: Introductionmentioning

confidence: 99%

Combustion Synthesis and Reactive Spark Plasma Sintering of Non-Equiatomic CoAl-Based High Entropy Intermetallics

et al. 2023

View full text Add to dashboard Cite

The present work reports the direct production of a high-entropy (HE) intermetallic CoNi0.3Fe0.3Cr0.15Al material with a B2 structure from mechanically activated elemental powder mixtures. Fast and efficient combustion synthesis (CS), spark plasma sintering (SPS), and reactive SPS (RSPS) methods were used to synthesize the HE powders and bulks. The formation of the main B2 phase along with some amounts of secondary BCC and FCC phases are reported, and L12 intermetallic (CS scheme) and BCC based on Cr (CS + SPS and RSPS schemes at 1000 °C) were observed in all samples. The interaction between the components during heating to 1600 °C of the mechanically activated mixtures and CS powders has been studied. It has been shown that the formation of the CoNi0.3Fe0.3Cr0.15Al phase occurs at 1370 °C through the formation of intermediate intermetallic phases (Al9Me2, AlCo, AlNi3) and their solid solutions, which coincidences well with thermodynamic calculations and solubility diagrams. Compression tests at room and elevated temperatures showed that the alloy obtained by the RSPS method has enhanced mechanical properties (σp = 2.79 GPa, σ0.2 = 1.82 GPa, ε = 11.5% at 400 °C) that surpass many known alloys in this system. High mechanical properties at elevated temperatures are provided by the B2 ordered phase due to the presence of impurity atoms and defects in the lattice.

show abstract

Section: Introductionmentioning

confidence: 99%

Combustion Synthesis and Reactive Spark Plasma Sintering of Non-Equiatomic CoAl-Based High Entropy Intermetallics

et al. 2023

View full text Add to dashboard Cite

show abstract

“…welding, coating, sintering, aluminum casting with ferrous inserts, hotdip aluminizing, etc. [7][8][9][10]. Therefore, understanding the formation mechanism of the η-and θphases is crucial to avoid their undesirable formation during manufacturing processes.…”

mentioning

confidence: 99%