Microstructure, thermal conductivity and simulation of elastic modulus of MAX-phase (Ti2AlC) gel-cast foams

Fey, Tobias; Stumpf, Martin; Chmielarz, Anna; Colombo, Paolo; Greil, Peter; Potoczek, Marek

doi:10.1016/j.jeurceramsoc.2018.04.012

Cited by 25 publications

(12 citation statements)

References 30 publications

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“…Reconstructions of the sonograms were done using the NReco Software (Client and Server, Version 1.7.2.4, Bruker, Koentgen, Belgium). A 3D visualization and pore network extraction were done using algorithms reported in our previous works, [14,27] and Amira 2019.3 (Thermo Fisher Scientific, Berlin, Germany). www.advancedsciencenews.com www.aem-journal.com Figure 2 shows the fractured surface of the sintered PZT samples with the different volume fraction of pores.…”

Section: Methodsmentioning

confidence: 99%

Temperature‐ and Stress‐Dependent Electromechanical Response of Porous Pb(Zr,Ti)O₃

et al. 2020

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The small‐signal direct piezoelectric coefficient and dielectric permittivity are characterized as a function of temperature from 25 to 450 °C and uniaxial compressive stress up to 80 MPa in porous Pb(Zr,Ti)O3 (PZT; 10, 20, 30, 40, and 50 vol% porosity). Results show retention of piezoelectric response throughout the temperature range with increasing porosity up to 30 vol%, above which a subsequent decrease is observed. Similarly, increasing porosity did not result in a significant change of the depolarization temperature, although a slight increase in the Curie point is observed with increasing porosity. Macroscopic experimental results are discussed together with microcomputed tomography, which shows the 3D pore structure. These results are important for sensing applications that operate at elevated temperatures and apply compressive stress to the electroactive element.

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Section: Methodsmentioning

confidence: 99%

Temperature‐ and Stress‐Dependent Electromechanical Response of Porous Pb(Zr,Ti)O₃

et al. 2020

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“…Elastic modulus and compressive strength at room temperature, as well as thermal conductivity [22], have been evaluated as a function of the porosity [15]. Reticulated MAX phase structures revealed a fully reversible and closed deformation hysteresis loops under subsequent cycles of compression [12].…”

Section: Introductionmentioning

confidence: 99%

High temperature compressive creep of dense and porous Cr2AlC in air

Araki

González‐Julián

Malzbender

2019

Journal of the European Ceramic Society

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The creep behaviours of the dense and porous Cr2AlC ceramics were investigated, being the first study on creep behaviour of not only Cr2AlC but also porous MAX phase. The creep rate of the porous Cr2AlC measured during cooling was significantly lower than the one during heating due to oxide and carbide scales formed during the creep tests at the high temperatures, whilst the dense Cr2AlC possesses consistent creep rates during heating and cooling. The formation of these scales led to the reinforcement of the porous ceramics and some healing of defects, which significantly improved the creep resistance. A comparison with other porous alloys and ceramics revealed that the oxidised porous Cr2AlC has a high potential as a refractory material, especially considering its machinability and lightweight .

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“…Gel casting of Ti 2 AlC has been reported to obtain foams with porosities higher than 90%. 234,235 Gel casting is based on the preparation of a suspension containing a gelling agent such as agarose (Figure 9). Foaming is carried out through agitation (or blowing air), followed by pouring the foamed suspension into a cold mold to form a strong and connected network.…”

Section: Direct Foamingmentioning

confidence: 99%

“…Gel casting of Ti 2 AlC has been reported to obtain foams with porosities higher than 90% 234,235 . Gel casting is based on the preparation of a suspension containing a gelling agent such as agarose (Figure 9).…”

Section: Structuresmentioning

confidence: 99%

Processing of MAX phases: From synthesis to applications

2020

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MAX phases are well-known and established due to their unique combination of properties and versatility, but this family of materials has experienced several ups and downs during its short history, including even being referred to with different names. Extensive work was carried out in the early 1960s in Vienna (Austria) by Wolfgang Jeitschko and Hans Nowotny, who discovered in more than 100 new carbides and nitrides. 1 Among them, they reported a new class of ternary systems, based on a transition metal (M), a metalloid (Me), and carbon (C), with a similar crystal structure to carbon-stabilized β-manganese phase, that is, Mo 3 Al 2 C. They were classified as "H-Phases" due to their hexagonal crystal structure, and some compositions

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Microstructure, thermal conductivity and simulation of elastic modulus of MAX-phase (Ti2AlC) gel-cast foams

Cited by 25 publications

References 30 publications

Temperature‐ and Stress‐Dependent Electromechanical Response of Porous Pb(Zr,Ti)O₃

Temperature‐ and Stress‐Dependent Electromechanical Response of Porous Pb(Zr,Ti)O₃

High temperature compressive creep of dense and porous Cr2AlC in air

Processing of MAX phases: From synthesis to applications

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Microstructure, thermal conductivity and simulation of elastic modulus of MAX-phase (Ti2AlC) gel-cast foams

Cited by 25 publications

References 30 publications

Temperature‐ and Stress‐Dependent Electromechanical Response of Porous Pb(Zr,Ti)O3

Temperature‐ and Stress‐Dependent Electromechanical Response of Porous Pb(Zr,Ti)O3

High temperature compressive creep of dense and porous Cr2AlC in air

Processing of MAX phases: From synthesis to applications

Contact Info

Product

Resources

About

Temperature‐ and Stress‐Dependent Electromechanical Response of Porous Pb(Zr,Ti)O₃

Temperature‐ and Stress‐Dependent Electromechanical Response of Porous Pb(Zr,Ti)O₃