Method for preparing NiAl system intermetallic compound composite self-lubricating coating through self-propagating method
An intermetallic compound, self-lubricating coating technology, applied in the field of surfacing, can solve the problems of high cost, short wear-resistant time of self-lubricating coating, limited service temperature, etc.
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specific Embodiment approach 1
[0015] Embodiment 1: A method for preparing a NiAl-based intermetallic compound self-lubricating coating by a self-propagating method in this embodiment is carried out in the following steps:
[0016] 1. Mix the Ni powder and the Al powder evenly, and then hold the pressure for 15min to 30min under the condition of 180MPa to 360MPa to obtain a Ni-Al compact; the molar ratio of the Ni powder to the Al powder is (0.8 to 1.2 ):1;
[0017] 2. Mix Ni powder, Al powder and molybdenum disulfide by ball milling for 0.5h~1.5h, and then hold the pressure for 15min~30min under the condition of 180MPa~360MPa to obtain 3Ni-Al-MoS 2 Compact; the mol ratio of the Al powder described in step 2 and the Al powder described in step 1 is 1:1; The mol ratio of the Ni powder described in step 2 and the Al powder described in step 2 is ( 2.8~3.2): 1; the mass ratio of the total mass of Ni powder and Al powder described in step 2 to molybdenum disulfide is 100: (5~20);
[0018] 3. Stack the lower h...
specific Embodiment approach 2
[0020] Embodiment 2: The difference between this embodiment and Embodiment 1 is that the molar ratio of Ni powder and Al powder in step 1 is 1:1. Other steps and parameters are the same as those in the first embodiment.
specific Embodiment approach 3
[0021] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that in step 1, the Ni-Al compact is obtained by holding the pressure for 20 minutes to 25 minutes under the condition of 270 MPa. Other steps and parameters are the same as those in Embodiment 1 or 2.
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