Effects of MoS2 Addiction on the Tribological Characteristics of Self-lubricating Nickel-base Material
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摘要: 详细地研究了在Ni-20Cr合金粉中添加MoS2,通过热压法制备得到的高温自润滑材料的摩擦学特性。研究表明,当MoS2的添加量在20%左右时,所得到的材料具有最佳的摩擦磨损性能。在热压过程中MoS2发生了热分解,并与合金中的铬反应生成了CrXSY(x/y=2/3～1)型硫化物共晶体,这种化合物在高温下可以变软或熔化,在摩擦面之间形成润滑膜,并具有转移性,从而具有减摩性能。Abstract: The tribological properties of the self-lubricating material, which was made from Ni-20Cr alloy powder and MoS 2 powder by HP process, were studied here in detail. The results show that the material with 20% MoS2 addiction has the best friction-wear properties. During HP process, MoS2 thermo-decomposes to react with chromium in the alloy and produce CrxSy(x/y=2/3~1) compound, which may soften or melt at high temperature and form transferring lubricating film between frictional surfaces to lower friction coefficient.
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Keywords:
- P/M /
- self-lubricating nickel-base material /
- solid lubrication
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