The Effects of Chemical Vapor Aluminizing Process Time and Post-processing for Nickel Aluminide Coating on CMSX-4 Alloy

Recent Advances in the Deposition of Aluminide Coatings on Nickel-Based Superalloys: A Synthetic Review (2019–2023)

“…In this process, a precursor gas is introduced into a chamber, where it reacts to form a solid film on the substrate surface (Figure 4). Since CVD is a commonly used process in the industry, the recent advances related to this deposition technique are mainly related to its successful application on different grades of nickel-based superalloys (Table 3) [1][2][3]5,[37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55]. It was reported that NiAl coatings were effectively deposited on MAR 247 [1-3,37,39,43,49-51], Inconel 740 [5], Inconel 738 [38,45], Inconel 713 [39,41,52], CMSX 4 [42,44,46], Inconel 100 [39], K-403 [47], K444 [51], pure nickel [48] and even on additively manufactured Haynes 282 [55].…”

“…Since CVD is a commonly used process in the industry, the recent advances related to this deposition technique are mainly related to its successful application on different grades of nickel-based superalloys (Table 3) [1][2][3]5,[37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55]. It was reported that NiAl coatings were effectively deposited on MAR 247 [1-3,37,39,43,49-51], Inconel 740 [5], Inconel 738 [38,45], Inconel 713 [39,41,52], CMSX 4 [42,44,46], Inconel 100 [39], K-403 [47], K444 [51], pure nickel [48] and even on additively manufactured Haynes 282 [55]. A significant fraction of the phase was retained in the coating after cyclic oxidation behavior in air +10% H2O at 900 °C for 1000h [33] 602 CA NiAl + Ge Maintains its integrity and protective behavior at 1200 °C [34] Hastelloy-X + NiCoCrAlY SiAl NiCoCrAlY (HVOF)/silico-aluminide (slurry) coating is more resistant to high-temperature oxidation at 1000 °C than NiCoCrAlY coating [35] Inconel 738 Ni/Cr/Ti-Al…”

“…Since CVD is a commonly used process in the industry, the recent advances related to this deposition technique are mainly related to its successful application on different grades of nickel-based superalloys (Table 3) [1][2][3]5,[37][38][39][40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55]. It was reported that NiAl coatings were effectively deposited on MAR 247 [1-3,37,39,43,49-51], Inconel 740 [5], Inconel 738 [38,45], Inconel 713 [39,41,52], CMSX 4 [42,44,46], Inconel 100 [39], K-403 [47], K444 [51], pure nickel [48] and even on additively manufactured Haynes 282 [55]. One can observe that NiAl coatings applied on different nickel-based superalloys have mainly been used to improve the corrosion resistance against high temperatures ranging between 1000 °C [5,38,39,43,44,46,…”

Effect of Aluminizing on the Oxidation of Inconel 718 and Inconel 738LC Superalloys at 925-1050°C

“…Aluminizing is the one of those protective coating deposition techniques applied to the nickel-based superalloys to produce a β-NiAl layer on their surfaces. [3], [7]. At high temperature applications, this β-NiAl layer gets oxidized and forms an oxidation resistant Al2O3 top surface layer.…”

“…By this way, penetration of oxygen to the nickel-based superalloy substrate is slowed down and hence its service life is improved. In literature, there are various methods to produce an aluminide coating such as pack aluminizing [8], high and low activity aluminizing by chemical vapour deposition [7], [3], slurry aluminizing [9] and hot dip aluminizing [10]. Each method produces different microstructures with characteristic properties which affect the service life of the substrate significantly.…”