Formation of CrxCyOz coatings under laser ablation of Cr23C6 ceramics

Chromium oxide formation on nanosecond and femtosecond laser irradiated thin chromium films

“…Direct laser writing using pulsed lasers offers a possibility for spatially selective oxidation of chromium which can be tailored to a given application. Focused pulsed laser beams are selectively absorbed in the focal spot on thin Chromium layers deposited on a substrate, leading to material modifications due to heating and eventually oxidation from the moisture in the air [11][12]. By translating the sample with respect to the focal spot, oxidation can be mediated in various 2D geometries on the material.…”

Double Glow Plasma Surface Metallurgy Technology Fabricated Fe-Al-Cr Coatings with Excellent Corrosion Resistance

“…In comparison, three main peaks of Fe-Al-Cr were slightly shifted negatively, indicating the incorporation of Al and Cr elements that enlarge the lattice spacing. In addition, six new peaks can be observed, which can be assigned to Fe2AlCr, Fe3Al(Cr), FeAl(Cr), Fe(Cr), Cr23C6, and α-Fe(Al) [20][21][22]. According to the elemental distributions and the XRD results (Figure 9a,b), the outside deposited layer contains Fe2AlCr distributing in grain boundaries as the strengthening phase, while the middle compound layer is mainly composed of Fe3Al(Cr) and FeAl(Cr).…”

Preventing Evaporation Products for High-quality Metal Film in Directed Energy Deposition: A Review

“…In the Cr-C phase diagram, however, the stability is Cr 23 C 6 <Cr 3 C 2 ≤Cr 7 C 3 [77,78]. Berdnikov and Vlasova reported the evaporation point of chromium carbides in the order of Cr 23 C 6 <Cr 7 C 3 <Cr 3 C 2 [79,80]. The powder containing chromium carbide has increased the vapor pressure of carbide when dissolved in 1527~1811 °C according to the C-Cr binary eutectic reaction [81] and Fe-Cr-C ternary eutectic reaction [82].…”

“…The powder containing chromium carbide has increased the vapor pressure of carbide when dissolved in 1527~1811 °C according to the C-Cr binary eutectic reaction [81] and Fe-Cr-C ternary eutectic reaction [82]. This presents the fume as oxidation [80] in the atmosphere. Despite this, there are few cases where refractory carbides, NbC, TaC, and ZrC, evaporate below…”