Microstructure and wear behavior of TiAl3 matrix self-lubricating composites by addition of fluoride solid lubricants
| Autor: | Linghui Song, Peilong Song, Shouren Wang, Yingzi Wang, Liying Yang |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Materials science
microstructure tial3 mechanical properties Microstructure solid lubricants wear rate chemistry.chemical_compound Matrix (mathematics) chemistry Materials Chemistry Ceramics and Composites TA401-492 Composite material Fluoride Materials of engineering and construction. Mechanics of materials Dry lubricant |
| Zdroj: | Science and Engineering of Composite Materials, Vol 21, Iss 3, Pp 341-349 (2014) |
| ISSN: | 2191-0359 0792-1233 |
| Popis: | The microstructure of TiAl3 composites with addition of different weight contents of solid lubricant (LiF, NaF, CaF2, and 38% CaF2-62% BaF2) were observed by scanning electron microscopy. Hardness, bend strength, and fracture toughness tests were carried out on an electron omnipotence testing machine. The friction and wear tests were performed using a high-temperature pin-on-disc tribometer at different friction conditions such as different loads, different sliding speeds, and different working temperatures. The results show that TiAl3 composites with 38% CaF2-62% BaF2 solid lubricant exhibit higher bending strength and fracture toughness than composites with other solid lubricants. In addition, the wear rate of TiAl3 composites with 38% CaF2-62% BaF2 solid lubricant is lowest in all composites. It is attributed to 38% CaF2-62% BaF2 solid lubricant forming a compact film on the wear surface of TiAl3 composites. The compact-film-forming mechanism is attributed to fluoride particles forced out of the reservoirs due to its high thermal expansion coefficient. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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