Study on the plasma sprayed amorphous diopside and annealed fine-grained crystalline diopside

Ctibor, Pavel; Nevrlá, Barbara; Pala, Zdeněk; Sedláček, Josef; Soumar, Jan; Kubatík, Tomáš František; Neufuss, K.; Vilémová, Monika; Medřický, Jan

doi:10.1016/j.ceramint.2015.04.154

Cited by 8 publications

(8 citation statements)

References 25 publications

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“…The values between 20 μm and 40 μm are comparable with e.g. WSP (a similar spray technique to WSP-H) sprayed TiO 2 (Ctibor, Sedlacek, and Pala, 2016) or WSPsprayed Ce:YAG (Ctibor et al, 2014), and slightly lower than WSP-sprayed natural diopside (Ctibor et al, 2015b). For low SD the roughness increases with higher FD.…”

supporting

confidence: 58%

Natural tourmaline as an efficient alternative to ceramic-type material for plasma spraying

Ctibor¹,

Nevrlá²,

Pala³

et al. 2018

J. S. Afr. Inst. Min. Metall.

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supporting

confidence: 58%

Natural tourmaline as an efficient alternative to ceramic-type material for plasma spraying

Ctibor¹,

Nevrlá²,

Pala³

et al. 2018

J. S. Afr. Inst. Min. Metall.

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“…During the spray process, the substrate was fixed (without any motion). The deposited coating thickness was about 3 mm and the layer was later removed from the substrate by thermal cycling at approximately −170/+100 • C. Details of (in principle very similar) spraying of other materials were reported in previous papers [31][32][33]. Morphologies of all feedstocks were similar to "fused and crushed" synthetic powders (not "agglomerated and sintered" powders).…”

Section: Sample Preparationmentioning

confidence: 60%

“…Micrographs of the cross-sections are shown in Figure 1. Spray setup optimization was done as described in pervious papers [31][32][33]. Spraying of individual particles was done for optimization.…”

Section: Microstructure and Porositymentioning

confidence: 99%

“…This is a sign of a uniform coating character within the entire thickness. The wear resistance, expressed as inverse wear rate (IWR), determined by the slurry test, was relatively higher for olivine than the other sprayed coatings made from natural powders: ilmenite = 46.1 m/mm 3 , diopside = 35.6 m/mm 3 [31], basalt = 42 m/mm 3 , garnet = 45 m/mm 3 , tourmaline = 15 m/mm 3 , and olivine = 62.8 m/mm 3 [32]. This could be because of the rather high hardness of sprayed olivine (Vickers microhardness HVm = 8.39 ± 1.11 GPa).…”

Section: Mechanical Propertiesmentioning

confidence: 99%

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Plasma Spray Coatings of Natural Ores From Structural, Mechanical, Thermal, and Dielectric Viewpoints

et al. 2019

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Various natural materials, namely ilmenite, diopside, tourmaline, olivine, garnet, and basalt, were plasma-sprayed and analyzed. This paper summarizes the various achievements of our earlier research and adds new results—mainly dielectric and optical characterizations. Plasma spraying of all of the materials was rather easy with a high feed-rate plasma system, which could process many kilograms of powder per hour. For easier characterizations, the coatings were detached from substrates in order to remain self-supporting. The plasma-sprayed layers that were coated from all studied materials acted as medium-permittivity and low-loss dielectrics, antireflective optical materials, and medium quality anti-abrasive barriers. Phase composition and microhardness were evaluated in addition to microstructure observations. Some coatings were amorphous and crystallized after further heating. As the melting points were well above 1000 °C, all of them could also serve as thermal barriers for aluminum alloys and similar metals. The only material that was not easily sprayed was tourmaline, which gave very porous coatings without environmental barrier or dielectric characteristics.

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“…Bipolar plates possess the characteristics of high chemical stability, high corrosion resistance, high conductivity, low contact resistance, good mechanical strength, and low permeability. However, very few materials can satisfy all these properties of bipolar plates [8][9][10]. Stainless steel is the most commonly used bipolar plate material, but it easily forms a passive film in the bipolar plate working environment, which caused an increase in the contact resistance and a reduction in the corrosion resistance of bipolar plates.…”

Section: Introductionmentioning

confidence: 99%

Properties of a Plasma-Nitrided Coating and a CrNx Coating on the Stainless Steel Bipolar Plate of PEMFC

Kang

et al. 2020

Coatings

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PEMFC are considered to be the most promising for automotive energy because of their good working effect, low temperature, high efficiency, and zero pollution. Stainless steel as a PEMFC bipolar plate has unparalleled advantages in strength, cost, and processability, but it is easy to corrode in a PEMFC working environment. In order to improve the corrosion resistance, the surface modification of 316L stainless steel is a feasible solution for PEMFC bipolar plates. In the present study, the plasma-nitrided coating and CrNx coating were prepared by the plasma-enhanced balanced magnetron sputtering technology on the 316L stainless steel surface. The microstructures, phase compositions, and corrosion resistance behavior of the coatings were investigated. The corrosion behavior of the prepared plasma-nitrided coating and CrNx coating was investigated by potentiodynamic polarization, potentiostatic polarization, and electrochemical impedance spectroscopy (EIS) in both cathodic and anodic environments. The experimental results show that corrosion resistance of the CrNx coating was better than the plasma-nitrided coating. It was indicated that the technology process of nitriding first and then depositing Cr was better than nitriding only.

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Study on the plasma sprayed amorphous diopside and annealed fine-grained crystalline diopside

Cited by 8 publications

References 25 publications

Natural tourmaline as an efficient alternative to ceramic-type material for plasma spraying

Natural tourmaline as an efficient alternative to ceramic-type material for plasma spraying

Plasma Spray Coatings of Natural Ores From Structural, Mechanical, Thermal, and Dielectric Viewpoints

Properties of a Plasma-Nitrided Coating and a CrNx Coating on the Stainless Steel Bipolar Plate of PEMFC

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