N based on the obtained mass adjust curves have been as a result pretty general. It was found that up to approximately 1500 h, the mass obtain recorded for the 718Plus sample oxidized in wet air was higher than for the sample oxidized in dry air by roughly 20 . For longer oxidation occasions below the wet air atmosphere, mass loss was observed. It can be presumed that this effect was related using the formation of volatile chromium oxyhydroxides–mostly CrO2 (OH)2 –as a outcome of the reaction between Cr2 O3 and O2 too as H2 O. It need to, nevertheless, be noted that when oxidation takes spot beneath quasi-isothermal situations, the observed mass loss might also be because of the oxide scale spallation caused by stresses that are generated in the oxide-metal technique as the sample is cooling down to ambient temperature. The co-occurrence of these two effects can’t be ruled out in this case. For the sample oxidized in dry air, on the other hand, continuous mass acquire was observed; nevertheless, spallation from the oxide scale is also attainable. Figure 2 presents the XRD spectra recorded inside the B-B geometry for the 718Plus superalloy samples oxidized for 4000 h in dry and wet air. The samples didn’t differ in terms of phase composition. The analysis in the spectra revealed that the primary oxide phase in the oxidation item was Cr2 O3 . Intense peaks originating in the and -Ni3 Nb Shogaol Description phases were also identified.Materials 2021, 14,5 ofMaterials 2021, 14, x FOR PEER REVIEW5 ofFigure 1. Mass gain recorded for the 718Plus superalloy oxidized at 850 as much as 4000 h in dry and wet air.Figure two presents the XRD spectra recorded inside the B-B geometry for the 718Plus superalloy samples oxidized for 4000 h in dry and wet air. The samples did not differ with regards to phase composition. The analysis of your spectra revealed that the primary oxide phase in Figure 1. Massthe oxidation item was Cr2O3. Intense peaks originating C up the and in dry and acquire recorded for the 718Plus superalloy oxidized at 850 from to 4000 h -Ni3Nb phases wet air. were also identified.Figure 2. X-ray diffraction patterns obtained for the oxide scale Pimasertib Purity formed on the 718Plus superalloy right after oxidation at 850 just after and wet air; XRD C for 4000 h in dry and for 4000 h in dry oxidation at 850 Bragg rentano geometry. wet air; XRD Bragg rentano geometry.Figure two. X-ray diffraction patterns obtained for the oxide scale formed around the 718Plus superalloyFigure three shows the surface morphology with the scales formed around the 718Plus 718Plus superalFigure 3 shows the surface morphology in the scales formed around the superalloy in dry and wet air immediately after and wet air just after oxidation of 120,h. These observations show that theshow loy in dry oxidation of 120, 1000 and 4000 1000 and 4000 h. These observations scales’ surface morphology differs to a substantial degree. After 120 h of Soon after 120 h of oxidation that the scales’ surface morphology differs to a important degree. oxidation in dry air, the surface on the corresponding scale capabilities numerous plate-like Cr2plate-like Cr2O3 crysin dry air, the surface from the corresponding scale options quite a few O3 crystallites spaced apart tallites a single one more. from 1 one more. werecrystallites were approximately 3 in from spaced apart The crystallites The about 3 in length, length, while not thickness did They protruded from the surface the surface although their thickness did theirexceed 1 .not exceed 1 . They protruded fromof an innerof an layer composed of fine grains with diameters of.