Dense and highly textured coatings obtained by aerosol deposition method from Ti3SiC2 powder: Comparison to a dense material sintered by Spark Plasma Sintering

Henon, Joseph; Piechowiak, Malgorzata Anna; Durand-Panteix, Olivier; Etchegoyen, G.; Masson, Olivier; Dublanche-Tixier, Christelle; Marchet, Pascal; Lucas, Bruno; Rossignol, Fabrice

doi:10.1016/j.jeurceramsoc.2014.10.012

Cited by 16 publications

(10 citation statements)

References 88 publications

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“…However, due to the mainly brittle character of the MAX-phase material, attained deposition efficiencies are rather low (\ 20%), and respective coatings show high amounts of internal, mainly lamellar cracks. In an alternative approach, still applying a kinetic spray technique, thin, low-porosity coatings of Ti 3 SiC 2 were processed by aerosol deposition (AD) ( Ref 26,27). A comparison of kinetically sprayed coatings of different MAX-phase materials applying the same spray technique and similar parameter sets is so far still missing.…”

Section: Introductionmentioning

confidence: 99%

Influence of MAX-Phase Deformability on Coating Formation by Cold Spraying

et al. 2020

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As solid-state deposition technique avoiding oxidation, cold gas spraying is capable of retaining feedstock material properties in the coatings, but typically fails to build up coatings of brittle materials. Ceramic MAX phases show partial deformability in particular lattice directions and may thus successfully deposit in cold spraying. However, deformation mechanisms under high strain rate, as necessary for cohesion and adhesion, are not fully clear yet. A MAX-phase deposit only builds up, if the specific mechanical properties of the MAX phase allow for, and if suitable spray parameter sets get realized. To investigate the influence of material properties and deposition conditions on coating microstructure and quality, three MAX phases, Ti3SiC2, Ti2AlC and Cr2AlC, were selected. Up to ten passes under different spray parameters yielded Ti2AlC and Cr2AlC coatings with thicknesses of about 200-500 µm. In contrast, Ti3SiC2 only forms a monolayer, exhibiting brittle laminar failure of the impacting particles. In all cases, the crystallographic structure of the MAX-phase powders was retained in the coatings. Thicker coatings show rather low porosities (< 2%), but some laminar cracks. The deposition behavior is correlated with individual mechanical properties of the different MAX-phase compositions and is discussed regarding the particular, highly anisotropic deformation mechanisms.

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Section: Introductionmentioning

confidence: 99%

Influence of MAX-Phase Deformability on Coating Formation by Cold Spraying

et al. 2020

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“…The AD is based on room temperature impact consolidation (RTIC) of ceramic powders and uses a pressure gradient to accelerate an aerosol of submicron particles through a nozzle to the substrate [39,40]. As the particles impact on the substrate, a dense layer forms by fracture and plastic deformation of the particles on the surface of the substrate [41,42,43,44]. Using this method, thin CuFeO 2 and dense layers were prepared to study the oxygen partial pressure dependence on the thermoelectric properties, to compare aerosol deposited CuFeO 2 with conventionally solid-state prepared CuFeO 2 , and to deepen the understanding of their electrical conduction mechanism.…”

Section: Introductionmentioning

confidence: 99%

Influence of Oxygen Partial Pressure during Processing on the Thermoelectric Properties of Aerosol-Deposited CuFeO2

et al. 2016

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In the field of thermoelectric energy conversion, oxide materials show promising potential due to their good stability in oxidizing environments. Hence, the influence of oxygen partial pressure during synthesis on the thermoelectric properties of Cu-Delafossites at high temperatures was investigated in this study. For these purposes, CuFeO2 powders were synthetized using a conventional mixed-oxide technique. X-ray diffraction (XRD) studies were conducted to determine the crystal structures of the delafossites associated with the oxygen content during the synthesis. Out of these powders, films with a thickness of about 25 µm were prepared by the relatively new aerosol-deposition (AD) coating technique. It is based on a room temperature impact consolidation process (RTIC) to deposit dense solid films of ceramic materials on various substrates without using a high-temperature step during the coating process. On these dense CuFeO2 films deposited on alumina substrates with electrode structures, the Seebeck coefficient and the electrical conductivity were measured as a function of temperature and oxygen partial pressure. We compared the thermoelectric properties of both standard processed and aerosol deposited CuFeO2 up to 900 °C and investigated the influence of oxygen partial pressure on the electrical conductivity, on the Seebeck coefficient and on the high temperature stability of CuFeO2. These studies may not only help to improve the thermoelectric material in the high-temperature case, but may also serve as an initial basis to establish a defect chemical model.

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“…High density is an outstanding property, usually exceeding 95% of the theoretical material density [2,3]. Any remaining pores in films are small, especially when compared to sintered bulk samples, with sizes between 15 and 100 nm [4,5]. These features distinguish the process from other types of additive manufacturing like aerosol jet spray [6], which is used to deposit relatively thin metallic or polymeric films, and requires a post chemical or thermal treatment.…”

Section: Introductionmentioning

confidence: 99%