Tribological behaviour of self-lubricating materials at high temperatures

Abstract

Self-lubricating materials are becoming more widespread in fields like metal forming or power generation due to the inability to use conventional lubricants in high-temperature (HT) applications. In an effort to summarise the progress done in this field, a detailed literature review has been carried out, ranging from micron-thickness thin films to hardfacings and bulk materials, and classified by the reported solid lubricants. Moreover, the most-cited deposition techniques have been reviewed for each lubricant class in addition to their advantages and limitations. HT friction and wear data for self-lubricating materials have also been examined in order to identify effective lubrication ranges and general trends in their tribological behaviour, which is expected to be useful for researchers interested in this field. Finally, several apparent research gaps have been described, with suggestions for new experimental work that could lead to the development of new high-temperature selflubricating materials.

A review of recent advances in tribology

“…Recently, two very comprehensive reviews on high temperature self-lubricating materials (solid lubricating materials) have been published, one by Torres et al [546] and another by Zhu et al [547].…”

“…Torres et al [546] have critically reviewed and analyzed the current trends and design strategies pertaining to high temperature solid lubrication for various classes of self-lubricating materials. A significant increase in scientific work in this field since early 2,000s has taken place.…”

“…Temperature ranges for effective lubrication for several solid lubricants. Reproduced with permission from Ref [546]…”

Exploring the friction and wear behaviors of Ag-Mo hybrid modified thermosetting polyimide composites at high temperature

“…The friction and wear behavior of TPI composites at high temperature is different from room temperature, but this work has been rarely reported at [24,25]. To the best of our knowledge, this phenomenon may be due to two reasons: the intrinsic conflict for TPI between high heat-resistance and the molding process, and the difficulty in obtaining suitable solid lubricants [26]. As is well known, the lubricating properties of numerous solid lubricants, such as graphite, molybdenum disulfide (MoS 2 ), and others, are rapidly degraded at elevated temperatures [27].…”

An Overview: Laser-Based Additive Manufacturing for High Temperature Tribology

“…Due to production limitations of conventional processes, LBAM becomes an attractive manufacturing technology, ensuring the homogenous distribution of alloying constituents by precisely tailoring the processing conditions. In LBAM, a variety of solid lubricants can be mixed with the base materials in the form of powders; hence providing freedom to develop applicationspecific materials (Torres et al, 2017). A generic classification of the solid lubricants is shown in Figure 2 (left) (Furlan et al, 2018).…”