A mcraly coating with excellent oxidation resistance and preparation method thereof
A coating and equipment technology, applied in the field of preparing MCrAlY coating by ion-assisted electron beam physical vapor deposition technology, can solve the problems of high cost, high coating deposition efficiency, large porosity, etc., and achieve the effect of reducing damage
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Embodiment 1
[0045] Embodiment 1: NiCoCrAlY coating is prepared on the as-cast NiCoCrAlY alloy substrate
[0046] (1) prepare the evaporating material rod, and set it aside;
[0047] The composition of NiCoCrAlY rod is nickel, cobalt, chromium, aluminum and yttrium, and its percentage by weight is 47.8% nickel, 20% cobalt, 22% chromium, 8.8% aluminum, 1.4% yttrium, the total amount of the above-mentioned components is 100%;
[0048] (2) Polish the Φ16×2mm disc cut from the above-mentioned rod with 150#, 300#, 400#, 800# sandpaper sequentially to make the surface roughness Ra<0.8. Then put it into acetone for ultrasonic cleaning for 30min, and install it on the rotating substrate frame of electron beam physical vapor deposition equipment;
[0049] (3) NiCoCrAlY feed rod is placed in the water-cooled copper crucible;
[0050] (4) Pump the vacuum chamber to the required lower than 5×10 -3 Pa vacuum degree;
[0051] (5) Set the rotational speed of the rotating substrate holder to 12rpm, a...
Embodiment 2
[0059] Embodiment 2: CoCrAlY coating is prepared on the DZ125 alloy substrate
[0060] (1) Prepare the evaporating material stick, spare
[0061] The composition of CoCrAlY feed rod is cobalt, chromium, aluminum and yttrium, and its percentage by weight is 57% cobalt, 30% chromium, 12% aluminum, 1.0% yttrium, and the total amount of above-mentioned each composition is 100%;
[0062] (2) Wire-cut the Φ16 DZ125 (composition in Table 1) alloy test rod into 2mm discs and polish it with 150#, 300#, 400#, 800# sandpaper in sequence to make the surface roughness Ra<0.8. Then put it into acetone for ultrasonic cleaning for 30min, and install it on the rotating substrate frame of electron beam physical vapor deposition equipment;
[0063] Table 1 Chemical composition of DZ125 alloy (wt.%)
[0064]
[0065] (3) CoCrAlY feed rod is placed in the water-cooled copper crucible;
[0066] (4) Pump the vacuum chamber to the required lower than 5×10 -3 Pa vacuum degree;
[0067] (5) Set...
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