Microstructural evolution in manganese cobaltite films grown on Crofer 22 APU substrates by pulsed laser deposition

Gambino, Louis; Magdefrau, Neal J.; Aindow, Mark

doi:10.1016/j.surfcoat.2015.12.034

Cited by 8 publications

(4 citation statements)

References 33 publications

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“…Gambino et. all [24] deposited films with spinel ceramic Mn1.5Co1.5O4 target by pulsed laser deposition method. The Authors observed columnar growth and multiphase structure: (Mn,Co)O and pure Co (fcc).…”

Section: Discussionmentioning

confidence: 99%

“…High substrate temperature favors the creation of nanocrystalline hierarchical spinel structure and did not cause spinel decomposition. The formation of a spinel layer on top of the sample surface was presented in [24] as a result of annealing the layer for 0.5 h at the temperature of 800 °C. Probably a similar process is possible in the presented layers while cooling the layers.…”

Section: Discussionmentioning

confidence: 99%

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Properties of multicomponent (Mn-Ni-Co-Al-Si-Ti) oxide spinel hierarchically organized nanostructures deposited by magnetron sputtering in two temperatures.

Sagan

Frugynskyi

Mroczka

et al. 2021

Phys. Chem. Solid St.

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Multicomponent spinel films were deposited on Ag/Si substrates by magnetron sputtering. Two substrate temperatures were used. XRD diffraction measurements show that the layers are composed of three metals oxides (Mn2O3, NiO, CoO). The presence of spinel phase is poorly visible. However, electron diffraction measurements (RHEED) clearly confirmed the presence of nanostructured spinel structure on top of the samples. Moreover, AFM measurements show that nanostructured spinel islands are present on the sample surface. The measurements validated that indeed, hierarchically organized spinel-oxides nanostructures were obtained. A possible model growth of the spinel nanostructures at different temperatures is discussed.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Properties of multicomponent (Mn-Ni-Co-Al-Si-Ti) oxide spinel hierarchically organized nanostructures deposited by magnetron sputtering in two temperatures.

Sagan

Frugynskyi

Mroczka

et al. 2021

Phys. Chem. Solid St.

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show abstract

“…The maximum metal loss rate of Cr from Cr 2 O 3 is 18 orders of magnitude greater than that of MnCr 2 O 4 at 1000 °C in dry air. The external method of spinel coating, such as Mn 1.5 Co 1.5 O 4, Mn 1.5 Cr 1.5 O 4 , were introduced to stainless steels to reduce both the oxidation kinetics and the evaporation of Cr species …”

Section: Discussionmentioning

confidence: 99%

Degradation of ferritic stainless steels at 1200 °C in air

Cheng

Jiang

Monaghan

et al. 2017

Materials & Corrosion

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Three commercial ferritic stainless steels were investigated at 1200°C by a thermogravimetric analyser (TGA) in air. The oxidation kinetics of the ferritic stainless steels differed significantly. The adhesion of the Cr 2 O 3 scale, the morphology of the SiO 2 , with or without (Cr, Mn) 3 O 4 spinel on the top can greatly influence the oxidation and the degradation behaviour of the steels. Although the SUS430 steel had less Cr among the ferritic stainless steels (16.2 wt% Cr), it did not show more degradation behaviour than the B443NT steel (21.0 wt% Cr). The spallation of the protective oxide scale on the B443NT steel was caused by vacancy condensation at the scale/substrate interface where the SiO 2 particles were and the developed compressive stresses within the oxide scale during oxidation. (Cr, Mn) 3 O 4 spinel on the top of the Cr 2 O 3 scale on the B445J1M steel influenced its evaporation rate. The thermodynamic aspect of the chemical composition and oxidation atmosphere of the Fe-Cr-O system was also discussed.

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“…Pulsed laser heating has been found to be better for processing efficiency and has a smaller heat affected zone than continuous laser heating [13]. Pulsed laser deposition is also used to study electrical conductivity, resistivity [14], grain size variation [15], hardness [16], corrosion resistance [17], and high quality spinel coating [18]. Gunmetal is used in industries where extreme hardness is required, e.g., defense (for making guns and artillery) and automobile.…”

Section: Introductionmentioning

confidence: 99%

Laser Surface Hardening of Gun Metal Alloys

Naeem¹,

Mehmood

et al. 2019

Materials

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The effect of laser irradiation with different numbers of laser shots on the microstructure, the surface, and the hardness of gun metal alloy was studied by a KrF pulsed excimer laser system, X-ray diffraction, Raman spectroscopy, scanning electron microscopy, and Vickers hardness test. The influence of 100–500 laser shots was irradiated on the surface hardness profile and on the microstructure of gunmetal alloy. XRD results showed the maximum 2θ shift, the maximum full width of half maximum FWHM, the maximum dislocation density, and the minimum crystallite size for the sample irradiated with 300 laser shots. The hardness was measured in three different regions at the laser irradiated spot, and it was found that maximum hardness was present at the heat affected zone for all samples. The hardness value of the un-irradiated sample of gun metal was 180, and the value increased up to 237 by raising the number of laser shots up to 300. The peak value of surface hardness of the laser treated sample was 32% higher than the un-irradiated sample. The Raman shift of the un-exposed sample was 605 cm−1 and shifted to a higher value of wave number at 635 cm−1 at 300 laser shots. The hardness value was decreased by further increasing the number of laser shots up to 500. The samples irradiated with 400 and 500 laser shots exhibited smaller hardness and dislocation defect density, which was assigned to possible annealing caused by irradiation.

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Microstructural evolution in manganese cobaltite films grown on Crofer 22 APU substrates by pulsed laser deposition

Cited by 8 publications

References 33 publications

Properties of multicomponent (Mn-Ni-Co-Al-Si-Ti) oxide spinel hierarchically organized nanostructures deposited by magnetron sputtering in two temperatures.

Properties of multicomponent (Mn-Ni-Co-Al-Si-Ti) oxide spinel hierarchically organized nanostructures deposited by magnetron sputtering in two temperatures.

Degradation of ferritic stainless steels at 1200 °C in air

Laser Surface Hardening of Gun Metal Alloys

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