Journal
MATERIALS
Volume 14, Issue 19, Pages -Publisher
MDPI
DOI: 10.3390/ma14195588
Keywords
solid lubricants; self-lubricating materials; self-lubricating composites; friction; wear
Categories
Funding
- NASA CAN [NV-80NSSC20M0221]
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Self-lubricating materials have become widely used for adequate lubrication in extreme conditions, presenting a solution to the challenges of friction and wear properties of liquid lubricants.
Lubrication for extreme conditions, such as high temperature, cryogenic temperature, vacuum pressure, high load, high speed, and corrosive environments, is a continuing challenge among tribologists and space engineers due to the inadequate friction and wear properties of liquid lubricants. As a result, tremendous research effort has been put forward to study lubrication mechanisms for various machine elements under challenging conditions over the past two decades. Self-lubricating materials have been most widely used for adequate lubrication in extreme conditions in recent years. This review paper presents state-of-the-art of materials for lubrication in extreme condition applications in aerospace, automotive, and power generation areas. More specifically, solid lubricants dispersed in various matrices for lubrication application were analyzed in-depth under challenging conditions. This study also reports the self-lubricating materials and their lubrication mechanisms. Finally, various applications and challenges of self-lubricating materials were explored.
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