Mechanical properties and reciprocating sliding tribological behaviors of γ-TiAl substrate and plasma-based Mo–Si–Ti coating
Plasma Mo–Si–Ti coating including the (Ti, Mo)5Si3, MoSi2 and TiSi was prepared on γ-TiAl surface to improve the wear resistance. The coating had 12-μm deposition layer and 5-μm diffusion layer, as well as gradual decrease of grain size from substrate to coating, providing gradient structure and hig...
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| Format: | Article |
| Language: | English |
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Elsevier
2023-09-01
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| Series: | Journal of Materials Research and Technology |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S223878542301788X |
| _version_ | 1797646745080954880 |
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| author | Fengkun Li Rajdeep Singh Rawat Pingze Zhang Dongbo Wei Ka Yang Bo Dang |
| author_facet | Fengkun Li Rajdeep Singh Rawat Pingze Zhang Dongbo Wei Ka Yang Bo Dang |
| author_sort | Fengkun Li |
| collection | DOAJ |
| description | Plasma Mo–Si–Ti coating including the (Ti, Mo)5Si3, MoSi2 and TiSi was prepared on γ-TiAl surface to improve the wear resistance. The coating had 12-μm deposition layer and 5-μm diffusion layer, as well as gradual decrease of grain size from substrate to coating, providing gradient structure and high fracture toughness. Hardness (H), elasticity modulus (E), H/E and H3/E2 values of substrate and coating were 8.4 and 19.6 GPa, 167.2 and 251.8 GPa, 0.050 and 0.078, and 0.021 and 0.119 GPa, indicating that coating had high hardness, resistance to plastic deformation and load bearing capacity. During friction, both the substrate and coating showed abrasive and oxidative wear. The substrate flaked off in the form of large wear debris, causing the high wear rate. However, oxide film and compacted layer of fine debris made the wear rates of substrate to decrease as the load increased. The coating released most of external stress in the form of elastic work, showing high load-bearing capacity. High fracture toughness inhibited the generation of cracks and reduced the spallation of coating. Moreover, fine grains promoted the generation of oxide film on coating surface and improved the adhesion between oxide film and coating. Meanwhile, the presence of oxide film resulted in a reduction of wear rate as the load increased. The excellent nanomechanical properties and fracture toughness reduced the fracture of coating and reduced the specific wear rate of γ-TiAl by about 98%, which could effectively improve the wear resistance of γ-TiAl at room temperature. |
| first_indexed | 2024-03-11T15:07:10Z |
| format | Article |
| id | doaj.art-ce97fa12673649d2aa7ce5bda0f33673 |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-03-11T15:07:10Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-ce97fa12673649d2aa7ce5bda0f336732023-10-30T06:02:58ZengElsevierJournal of Materials Research and Technology2238-78542023-09-012614691483Mechanical properties and reciprocating sliding tribological behaviors of γ-TiAl substrate and plasma-based Mo–Si–Ti coatingFengkun Li0Rajdeep Singh Rawat1Pingze Zhang2Dongbo Wei3Ka Yang4Bo Dang5College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, 211106, China; Natural Sciences and Science Education, National Institute of Education, Nanyang Technological University, Singapore, 637616, Singapore; Key Laboratory of Materials Preparation and Protection for Harsh Environment (Nanjing University of Aeronautics and Astronautics), Ministry of Industry and Information Technology, Nanjing, Jiangsu, 211106, ChinaNatural Sciences and Science Education, National Institute of Education, Nanyang Technological University, Singapore, 637616, SingaporeCollege of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, 211106, China; Key Laboratory of Materials Preparation and Protection for Harsh Environment (Nanjing University of Aeronautics and Astronautics), Ministry of Industry and Information Technology, Nanjing, Jiangsu, 211106, China; Corresponding author. College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, 211106, China.College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, 211106, China; Key Laboratory of Materials Preparation and Protection for Harsh Environment (Nanjing University of Aeronautics and Astronautics), Ministry of Industry and Information Technology, Nanjing, Jiangsu, 211106, ChinaCollege of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, 211106, China; Key Laboratory of Materials Preparation and Protection for Harsh Environment (Nanjing University of Aeronautics and Astronautics), Ministry of Industry and Information Technology, Nanjing, Jiangsu, 211106, ChinaCollege of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, 211106, China; Key Laboratory of Materials Preparation and Protection for Harsh Environment (Nanjing University of Aeronautics and Astronautics), Ministry of Industry and Information Technology, Nanjing, Jiangsu, 211106, ChinaPlasma Mo–Si–Ti coating including the (Ti, Mo)5Si3, MoSi2 and TiSi was prepared on γ-TiAl surface to improve the wear resistance. The coating had 12-μm deposition layer and 5-μm diffusion layer, as well as gradual decrease of grain size from substrate to coating, providing gradient structure and high fracture toughness. Hardness (H), elasticity modulus (E), H/E and H3/E2 values of substrate and coating were 8.4 and 19.6 GPa, 167.2 and 251.8 GPa, 0.050 and 0.078, and 0.021 and 0.119 GPa, indicating that coating had high hardness, resistance to plastic deformation and load bearing capacity. During friction, both the substrate and coating showed abrasive and oxidative wear. The substrate flaked off in the form of large wear debris, causing the high wear rate. However, oxide film and compacted layer of fine debris made the wear rates of substrate to decrease as the load increased. The coating released most of external stress in the form of elastic work, showing high load-bearing capacity. High fracture toughness inhibited the generation of cracks and reduced the spallation of coating. Moreover, fine grains promoted the generation of oxide film on coating surface and improved the adhesion between oxide film and coating. Meanwhile, the presence of oxide film resulted in a reduction of wear rate as the load increased. The excellent nanomechanical properties and fracture toughness reduced the fracture of coating and reduced the specific wear rate of γ-TiAl by about 98%, which could effectively improve the wear resistance of γ-TiAl at room temperature.http://www.sciencedirect.com/science/article/pii/S223878542301788Xγ-TiAlMo–Si–Ti gradient coatingNanoindentationWear mechanism |
| spellingShingle | Fengkun Li Rajdeep Singh Rawat Pingze Zhang Dongbo Wei Ka Yang Bo Dang Mechanical properties and reciprocating sliding tribological behaviors of γ-TiAl substrate and plasma-based Mo–Si–Ti coating Journal of Materials Research and Technology γ-TiAl Mo–Si–Ti gradient coating Nanoindentation Wear mechanism |
| title | Mechanical properties and reciprocating sliding tribological behaviors of γ-TiAl substrate and plasma-based Mo–Si–Ti coating |
| title_full | Mechanical properties and reciprocating sliding tribological behaviors of γ-TiAl substrate and plasma-based Mo–Si–Ti coating |
| title_fullStr | Mechanical properties and reciprocating sliding tribological behaviors of γ-TiAl substrate and plasma-based Mo–Si–Ti coating |
| title_full_unstemmed | Mechanical properties and reciprocating sliding tribological behaviors of γ-TiAl substrate and plasma-based Mo–Si–Ti coating |
| title_short | Mechanical properties and reciprocating sliding tribological behaviors of γ-TiAl substrate and plasma-based Mo–Si–Ti coating |
| title_sort | mechanical properties and reciprocating sliding tribological behaviors of γ tial substrate and plasma based mo si ti coating |
| topic | γ-TiAl Mo–Si–Ti gradient coating Nanoindentation Wear mechanism |
| url | http://www.sciencedirect.com/science/article/pii/S223878542301788X |
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