VN-AgMoS2 composite material with wide temperature range self-lubricating performance and preparation method of VN-AgMoS2 composite material
A composite material and self-lubricating technology, which is applied in the wide temperature range self-lubricating VN-AgMoS2 composite material and its preparation field, to achieve the effect of tight combination, less equipment investment and uniform structure
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[0029] A preparation method of a wide temperature range nickel-based self-lubricating composite material, comprising the steps of:
[0030] 1) Weigh 70-90% of VN powder, 5-15% of silver powder and 5-15% of molybdenum disulfide powder by mass ratio to obtain original ingredients;
[0031] 2) Use a planetary ball mill for mechanical mixing of the original ingredients to obtain a uniform mixed powder;
[0032] 3) Put the mixed powder into the graphite grinding tool for cold pressing;
[0033] 4) Under vacuum protection, the graphite abrasive tool with mixed powder is sintered at high temperature by hot pressing to obtain VN-Ag / MoS 2 composite material.
[0034] Described VN powder, Ag powder and MoS 2 All are purchased from the market, and the average particle size is <15 μm, <1 μm and <10 μm, respectively.
[0035] As a further improvement of the above preparation method, the ball-to-material ratio in the ball milling process in step 2) is 5:1-10:1, the ball-milling speed is...
Example Embodiment
[0039] Example 1 A VN-Ag / MoS with excellent wide temperature range self-lubricating properties 2 The composite material and its preparation method are carried out according to the following steps:
[0040] (1) According to the mass fraction of VN powder is 70%, Ag / MoS 2 The mass fractions were 15% of the proportion of ingredients, weighing 70 grams of vanadium nitride powder and Ag / MoS 2 15 grams of each powder to obtain the original batch, wherein the average particle size of the VN powder is 2 The average particle size of the powder is <10 μm.
[0041] (2) Put the original ingredients in a planetary ball mill, and mix them for 5 hours at a ball-to-material ratio of 10:1 and a rotational speed of 200 r / min to obtain uniformly mixed sintered ingredients;
[0042](3) Put the sintered ingredients into the graphite grinding tool, firstly perform cold pressing at a pressure of 10 MPa, and then perform hot pressing sintering in a vacuum environment, where the sintering temperatur...
Example Embodiment
[0044] Example 2 A VN-Ag / MoS with excellent wide temperature range self-lubricating properties 2 The composite material and its preparation method are carried out according to the following steps:
[0045] (1) According to the mass fraction of VN powder is 80%, Ag / MoS 2 The mass fractions were 10% of the proportion of ingredients, weighing 80 grams of vanadium nitride powder and Ag / MoS 2 10 grams of each powder to obtain the original ingredients, wherein the average particle size of VN powder 2 The average particle size of the powder is <10 μm.
[0046] (2) Put the original ingredients in a planetary ball mill, and mix them for 5 hours at a ball-to-material ratio of 10:1 and a rotational speed of 200 r / min to obtain uniformly mixed sintered ingredients;
[0047] (3) Put the sintered ingredients into the graphite grinding tool, firstly perform cold pressing at a pressure of 10 MPa, and then perform hot pressing sintering in a vacuum environment, where the sintering temperatur...
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