Tailoring of Functionally Graded Mullite: La2O3 Coatings by Transferred Arc Plasma for Thermal Barrier Coatings

Shreeram, B.; Rajendran, I.; Kumar, Е. Ranjith

doi:10.1007/s10904-018-0920-x

Cited by 6 publications

(2 citation statements)

References 46 publications

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“…The lattice constants of the martensite are similar to the austenite [28], which probably results in a small thermal stress between the austenite and the martensite. Although there are many references on the remelting [4,5] and alloying [6][7][8][9][10][11][12][13][14] of ductile cast iron or gray cast iron by plasma transferred arc, researchers have paid more attention to the effect of the parameter during the process of plasma transferred arc on the microstructure and properties of the remelting coating or alloy coating, and similarly this type of work may be the first time and it cannot be compared with the data of the published reference.…”

Section: Forming Featuresmentioning

confidence: 99%

“…Among them, the plasma transferred arc (PTA) has many advantages of minimal thermal deformations, metallurgical bonding and refined grains under rapid cooling. It has a great application potential, for example, for remelted coatings [4,5], clad coatings [6,7] and alloyed coatings [8][9][10][11][12]. Previous results demonstrated that PTA treatment enhances the targeted surfaces' hardness, wear resistance and other mechanical properties.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Scanning Strategy on the Microstructure and Triboperformance of FeNiCrMo Coating Manufactured by Plasma Transferred Arc

Xiao,

Li,

Song

et al. 2023

Materials

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To increase the coating thickness and service life of the FeNiCrMo coating, a plasma transferred arc (PTA) double-track alloying technique was employed to enhance the surface triboperformance of the ductile iron. Optical microscopy (OM), X-ray diffraction (XRD), electron probe X-ray microanalyzer (EPMA), scanning electron microscopy (SEM), transmission electron microscopy (TEM), Vickers hardness tester, and tribological tester were subsequently used to evaluate the effect of the double alloying treatment tracks on the microstructure and triboperformance of the coating. The results indicate that the content of the cementite in the sample with a double-track treatment increases 3.90 wt.% and the content of the martensite decreases 13.04 wt.% compared with the sample with a single-track treatment, which results in the maximum microhardness of the sample fabricated by double track increasing from 837 ± 10 HV0.2 for the sample fabricated by single track to 871 ± 7 HV0.2. Thus, the wear rate is lower than that of the sample with a single-track treatment. In addition, the distribution of alloying elements is more uniform and coating thickness is higher in the double track than those of the single-track-treated one. Therefore, the double-track PTA alloying treatment is favored for hardfacing ductile iron with a FeNiCrMo alloy coating due to its enhanced triboperformance and longer service life.

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