Mechanical and magnetic properties of semi-Heusler/light-metal composites consolidated by spark plasma sintering

Koller, Martin; Chráska, Tomáš; Cinert, Jakub; Heczko, Oleg; Kopeček, Jaromı́r; Landa, Michal; Mušálek, Radek; Rameš, Michal; Seiner, Hanuš; Stráský, Josef; Janeček, Miloš

doi:10.1016/j.matdes.2017.04.028

Cited by 10 publications

(9 citation statements)

References 27 publications

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“…Unfortunately, the dependence of the thickness of these interface layers on sintering time cannot be unambiguously determined from the SEM imaging. On the other hand, indirect magnetization measurements indicate a reduced magnetization for samples sintered for longer times 20 . This suggests that the volume fraction (and therefore also the thickness) of non-magnetic interface layers increases with increasing sintering time.…”

Section: Results and Data Evaluationmentioning

confidence: 97%

“…On the contrary, SANS is sensitive solely to C9 precipitates. As a consequence, the thickness of C9 phase layer on the CoNiAl-Ti interface is expected to increase with increasing sintering time 20 , while fine C9 precipitates near the interfacial layer between Ti and CoNiAl grains tend to disappear.…”

Section: Results and Data Evaluationmentioning

confidence: 99%

“…Recently, Koller et al . 20 explored the possibility of combining a light metal with a ferromagnetic semi-Heusler alloy, in order to obtain a light-weight metal composite with locally ferromagnetic behaviour. In such composite, the structural damage could be identified by Barkhausen noise detection or it might be usable for light-weight magnetic shielding applications.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, considering that CoNiAl is a ferromagnetic material and titanium is well known as a biocompatible metal, the composite made of these two material may find its use in novel medical applications, such as cancer treatment by so-called magnetic hyperthermia 21 , 22 . The authors reported on mechanical properties and selected functional properties of this composite, particularly ferromagnetism and ferroelasticity, noticing the existence of non-magnetic layers at the semi-Heusler/light metal interface 20 . In this study, we present a detailed analysis of the crystal structure and chemical composition of the same composite, i.e.…”

Section: Introductionmentioning

confidence: 99%

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Structural characterization of semi-heusler/light metal composites prepared by spark plasma sintering

Kopeček

Bartha

Mušálek

et al. 2018

Sci Rep

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A composite of powders of semi-Heusler ferromagnetic shape memory and pure titanium was successfully prepared by spark plasma sintering at the temperature of 950 °C. Sintering resulted in the formation of small precipitates and intermetallic phases at the heterogeneous interfaces. Various complementary experimental methods were used to fully characterize the microstructure. Imaging methods including transmission and scanning electron microscopy with energy dispersive X-ray spectroscopy revealed a position and chemical composition of individual intermetallic phases and precipitates. The crystalline structure of the phases was examined by a joint refinement of X-ray and neutron diffraction patterns. It was found that Co38Ni33Al29 decomposes into the B2-(Co,Ni)Al matrix and A1-(Co,Ni,Al) particles during sintering, while Al, Co and Ni diffuse into Ti forming an eutectic two phase structure with C9-Ti2(Co,Ni) precipitates. Complicated interface intermetallic structure containing C9-Ti2(Co,Ni), B2-(Co,Ni)Ti and L21-(Co,Ni)(Al,Ti) was completely revealed. In addition, C9-Ti2(Co,Ni) and A1-(Co,Ni,Al) precipitates were investigated by an advanced method of small angle neutron scattering. This study proves that powder metallurgy followed by spark plasma sintering is an appropriate technique to prepare bulk composites from very dissimilar materials.

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Section: Results and Data Evaluationmentioning

confidence: 97%

Section: Results and Data Evaluationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Structural characterization of semi-heusler/light metal composites prepared by spark plasma sintering

Kopeček

Bartha

Mušálek

et al. 2018

Sci Rep

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“…SPS is a method for powder processing which is characterized by application of pulsed direct electric current and uniaxial pressure during sintering enabling a high-speed compaction [21]. It is highly efficient and applicable in the production of nano-materials, composites, dense solid materials, electronic materials, and biomaterials [22][23][24][25]. The SPS method has several advantages that distinguish it from the traditional sintering methods such as hot pressing and sintering of pre-compacted Tab.ts.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and phase composition of steatite ceramics sintered by traditional and spark plasma sintering

et al. 2018

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The influence of the sintering method on the mineral phase transformations and development of the crystalline microstructure of steatite ceramics was investigated. The steatite samples were fabricated from talc and bentonite as low-cost raw materials. Feldspar and barium carbonate, as fluxing agents, were altered in the steatite composition. Dilatometric analysis was applied in the monitoring of the dimensional changes and thereby densification of steatite during the traditional sintering (TS) procedure up to 1200 °C. Spark plasma sintering (SPS) method was used under the following sintering conditions: 100 °C/min heating rate, uniaxial pressure of 50 MPa; sintering temperature 800 °C/1 min or 1000 °C/2 min. Crystallinity changes and mineral phase transition during sintering were observed by X-ray diffraction technique. Microstructural visualization of the samples and the spatial arrangements of individual chemical elements were achieved via scanning electron microscopy equipped with the EDS mapping. It was found that SPS sintering facilitated all microstructural changes during high temperature treatment and shifted them to lower temperatures. SPS treatment conducted at 1000 °C resulted in maximum densification of the steatite powder compacts and the formation stabilized protoenstatite structure.

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On the relation between microstructure and elastic constants of tungsten/steel composites fabricated by spark plasma sintering

Koller

Kruisová

Mušálek

et al. 2018

Fusion Engineering and Design

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Mechanical and magnetic properties of semi-Heusler/light-metal composites consolidated by spark plasma sintering

Cited by 10 publications

References 27 publications

Structural characterization of semi-heusler/light metal composites prepared by spark plasma sintering

Structural characterization of semi-heusler/light metal composites prepared by spark plasma sintering

Microstructure and phase composition of steatite ceramics sintered by traditional and spark plasma sintering

On the relation between microstructure and elastic constants of tungsten/steel composites fabricated by spark plasma sintering

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