Particle size effects on chemistry and structure of Al-Cu-Fe quasicrystalline coatings

Sordelet, D.J.; Besser, M.F.; Anderson, I. E.

doi:10.1007/bf02646430

Cited by 53 publications

(19 citation statements)

References 20 publications

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“…This behavior, typical of aluminum-based quasicrystals but not of aluminum-based metal alloys, such as Al-Ni, has been related to the different thermal conductivity of the two types of materials [46]. In plasma spraying the dependence of aluminum loss from the particle dimension and thermal conductivity is clearly connected to the progressive melting of the surface and the absence of such effects in our system confirms that a very rapid non equilibrium transition from solid to melt takes place on the target as a consequence of the interaction with the ultra-short laser pulse.…”

Section: Ablation-deposition Mechanismmentioning

confidence: 97%

Ultra-short pulse laser ablation of Al70Cu20Fe10 alloy: Nanoparticles generation and thin films deposition

et al. 2009

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Section: Ablation-deposition Mechanismmentioning

confidence: 97%

Ultra-short pulse laser ablation of Al70Cu20Fe10 alloy: Nanoparticles generation and thin films deposition

et al. 2009

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“…This is due to the more homogeneous distribution of yttria in the zirconia super-lattice resulting from sol-gel technique. For complex coatings, such as quasi-crystalline ones (Ref 23,24), or mullite ones (Ref 25), there is also a close correlation between powder manufacturing route, phase structure, crystallinity, and coating properties.…”

Section: Introductionmentioning

confidence: 99%

From Powders to Thermally Sprayed Coatings

2009

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Since the early stages of thermal spray, it has been recognized that the powder composition, size distribution, shape, mass density, mechanical resistance, components distribution for composite particles play a key role in coating microstructure and thermo mechanical properties. The principal characteristics of particles are strongly linked to the manufacturing process. Coatings also depend on the process used to spray particles and spray parameters. Many papers have been devoted to the relationships existing between coating properties and structures at different scales and manufacturing processes. In many conventional spray conditions resulting in micrometric structures, among the different parameters, good powder flow ability, and dense particles are important features. Thermal plasma treatment, especially by RF plasma, of particles, prepared by different manufacturing processes, allows achieving such properties and it is now developed at an industrial scale. Advantages and drawbacks of this process will be discussed. Another point, which will be approached, is the self-propagating high-temperature synthesis, depending very strongly upon the starting composite particle manufacturing. However, as everybody knows, ''small is beautiful'' and nano-or finely structured coatings are now extensively studied with spraying of: (i) very complex alloys containing multiple elements which exhibit a glass forming capability when cooled-down, their under-cooling temperature being below the glass transition temperature; (ii) conventional micrometer-sized particles (in the 30-90 lm range) made of agglomerated nanometersized particles; (iii) sub-micrometer-or nanometer-sized particles via a suspension in which also, instead of particles, stable sol of nanometer-sized particles can be introduced; and (iv) spray solutions of final material precursor. These different processes using plasma, HVOF or sometimes flame and also cold-gas spray will be discussed together with the production of nanometer-sized particles via the chemical reaction method or by a special type of milling: the cryogenic milling process often referred to as ''cryomilling.''

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“…The phase composition of the test materials was analyzed with x-ray diffraction (DART-UM1 diffractometer, Cu-K α radiation). In assessing the amount of the quasicrystalline phase, we used the calibrating curve provided in [23]. The surface structure of the sintered samples was examined using a Superprobe-733 scanning electron microscope (SEM).…”

Section: Methodsmentioning

confidence: 99%

Mechanical properties of Al–Cu–Fe alloys sintered at high pressure

Milman

Efimov

Ul’shin

et al. 2010

Powder Metall Met Ceram

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The structure and mechanical behavior of bulk Al-Cu-Fe materials sintered at high hydrostatic pressure are studied at room temperature. Quasicrystalline Al 63 Cu 25 Fe 12 and Al 62.7 Cu 25 Fe 12 Sc 0.3 powders and Al 66 Cu 18 Fe 8 Cr 8 , powder, which is the quasicrystal approximant, are sintered at high pressure. The powders are obtained by high-pressure water atomization. At an optimal hot compaction pressure of 4.5 GPa, the porosity of the compact materials is lower than 2%. Sintering is conducted at 700°C. The stress-strain curves of quasicrystals and their approximants that are brittle in standard test conditions are obtained using indentation method. It is shown that the crystalline approximants of quasicrystals are much closer in their mechanical behavior to quasicrystals than to crystalline solids.

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Particle size effects on chemistry and structure of Al-Cu-Fe quasicrystalline coatings

Cited by 53 publications

References 20 publications

Ultra-short pulse laser ablation of Al70Cu20Fe10 alloy: Nanoparticles generation and thin films deposition

Ultra-short pulse laser ablation of Al70Cu20Fe10 alloy: Nanoparticles generation and thin films deposition

From Powders to Thermally Sprayed Coatings

Mechanical properties of Al–Cu–Fe alloys sintered at high pressure

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