High-temperature Behaviour of New Fe-Al-Si Alloy Produced by Powder Metallurgy

Novák, Pavel; Nová, Kateřina; Vanka, Tomáš; Průša, Filip

doi:10.21062/ujep/95.2018/a/1213-2489/mt/18/2/299

Cited by 6 publications

(1 citation statement)

References 9 publications

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“…Recently, the group of Fe-Al-Si intermetallic alloys prepared by powder metallurgy, especially by mechanical alloying, was investigated from different points of view -the effect of silicon on the structure, mechanical properties or, high-temperature behaviour was tested [10][11][12]. Further research [13,14] reports a significant effect of silicon on the oxidation resistance of Fe-Al based alloys by improving the protective effect of the oxide layer on the surface of the material and the formation of other oxidation-resistant silicon-rich phases below this layer.…”

Section: Introductionmentioning

confidence: 99%

The Influence of Cr Addition and Heat Treatment on Dilatometric Characteristics of Cast Fe-Al-Si Intermetallic Alloys

Vodičková¹,

Prokopčáková²,

Švec³

et al. 2022

Manufacturing Technology

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The cast Fe-Al-Si type intermetallic alloys (with or without chromium content) were investigated with the aim to obtain the values of thermal expansion coefficient and describe the dilatometric behavior of alloys. The effect of chromium addition, as well as the influence of heat treatment on the structure and dilatometric characteristics (thermal expansion coefficient, CTE), were described. It has been shown that the presence of chromium does not significantly influence the values of thermal expansion coefficient of as-cast alloys so that chromium addition can be substituted by higher silicon content. The annealing used for phase stabilization slightly decreases the CTE values for chromium doped alloys, nevertheless only in the higher temperature range. In comparison, CTE values of the alloy without chromium are slightly increased by the annealing used in the whole temperature interval. But, the differences are not significant from the point of view of technical practice.Fe 3 Al-type iron aluminides silicon and chromium addition thermal expansion coefficient heat-treatment

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Section: Introductionmentioning

confidence: 99%

The Influence of Cr Addition and Heat Treatment on Dilatometric Characteristics of Cast Fe-Al-Si Intermetallic Alloys

Vodičková¹,

Prokopčáková²,

Švec³

et al. 2022

Manufacturing Technology

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How to Determine Possible Interactions of Silicide and Aluminide in Preparation of Composites

Novak,

Mestek,

Michalcová

et al. 2024

Manufacturing Technology

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Silicide -aluminide composites could be considered as potential tool materials, because of high wear resistance and thermal stability. Recently, the alloys based on iron aluminide and silicide were tested, but they found to be very brittle due to the occurrence of brittle Fe-Al-Si ternary phases. On the other hand, in TiAl-Ti5Si3 composite, no ternary phase was formed during sintering, even though it can be expected based on thermodynamics. Therefore, this paper aims on finding the way how to test potential interaction between silicide and aluminide phase during preparation of these composites on the example of the FeSi -NiAl composite. The approach, proposed in this work, deals with the pre-sintered iron silicide, which was surrounded by aluminide powder in the sintering die and spark plasma sintered again. After that this model sample was annealed under various conditions and the FeSi -NiAl interface was observed. The experiments proved that no chemical reaction between FeSi and NiAl phase occurs during sintering and thermal exposure at 1000 °C. The visible interfacial layer is just a result of mutual diffusion.

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