Structure and Properties of Ti-Al Intermetallic Coatings Reinforced with an Aluminum Oxide Filler
In this paper, the results of a study of the structure and phase composition of the hot-dip aluminizing coatings formed on the commercially pure titanium surface in AW-6063 aluminum alloy melt after heat treatment at 700 and 850 °C are presented. It is shown that as a result of aluminizing on the ti...
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2024-11-01
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| author | Artem Igorevich Bogdanov Vitaliy Pavlovich Kulevich Victor Georgievich Shmorgun Leonid Moiseevich Gurevich |
| author_facet | Artem Igorevich Bogdanov Vitaliy Pavlovich Kulevich Victor Georgievich Shmorgun Leonid Moiseevich Gurevich |
| author_sort | Artem Igorevich Bogdanov |
| collection | DOAJ |
| description | In this paper, the results of a study of the structure and phase composition of the hot-dip aluminizing coatings formed on the commercially pure titanium surface in AW-6063 aluminum alloy melt after heat treatment at 700 and 850 °C are presented. It is shown that as a result of aluminizing on the titanium surface, a homogeneous coating 30–40 µm thick without defects is formed. The hot-dip aluminizing coating consists of aluminum and the intermetallic compound TiAl<sub>3</sub>, located at the boundary with the substrate. Heat treatment results in the formation of a heterogeneous coating structure: its outer layer has a frame-type structure consisting of TiAl<sub>3</sub> particles surrounded by an Al<sub>2</sub>O<sub>3</sub> + TiO<sub>2</sub> grid, and the inner continuous layer adjacent to the titanium consists of TiAl<sub>2</sub>, TiAl, and Ti<sub>3</sub>Al intermetallic layers. Increasing in the heat treatment temperature and/or holding time results in an increase in the thickness of both the outer and boundary layers of the coating. A mechanism for the formation of the coating structure via heat treatment is proposed. The scratch test method was used to evaluate the cohesive and adhesive strength of the coatings, and their scratch hardness was determined, which averaged 200 MPa. It was shown that the coating structure formed during heat treatment at 850 °C ensures higher resistance to cohesive failure. |
| format | Article |
| id | doaj-art-cd89db993d13485faaa7defdd0110a05 |
| institution | DOAJ |
| issn | 2075-4701 |
| language | English |
| publishDate | 2024-11-01 |
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| spelling | doaj-art-cd89db993d13485faaa7defdd0110a052025-08-20T02:57:20ZengMDPI AGMetals2075-47012024-11-011412133610.3390/met14121336Structure and Properties of Ti-Al Intermetallic Coatings Reinforced with an Aluminum Oxide FillerArtem Igorevich Bogdanov0Vitaliy Pavlovich Kulevich1Victor Georgievich Shmorgun2Leonid Moiseevich Gurevich3Materials Science and Composite Materials Department, Volgograd State Technical University, 400005 Volgograd, RussiaMaterials Science and Composite Materials Department, Volgograd State Technical University, 400005 Volgograd, RussiaMaterials Science and Composite Materials Department, Volgograd State Technical University, 400005 Volgograd, RussiaMaterials Science and Composite Materials Department, Volgograd State Technical University, 400005 Volgograd, RussiaIn this paper, the results of a study of the structure and phase composition of the hot-dip aluminizing coatings formed on the commercially pure titanium surface in AW-6063 aluminum alloy melt after heat treatment at 700 and 850 °C are presented. It is shown that as a result of aluminizing on the titanium surface, a homogeneous coating 30–40 µm thick without defects is formed. The hot-dip aluminizing coating consists of aluminum and the intermetallic compound TiAl<sub>3</sub>, located at the boundary with the substrate. Heat treatment results in the formation of a heterogeneous coating structure: its outer layer has a frame-type structure consisting of TiAl<sub>3</sub> particles surrounded by an Al<sub>2</sub>O<sub>3</sub> + TiO<sub>2</sub> grid, and the inner continuous layer adjacent to the titanium consists of TiAl<sub>2</sub>, TiAl, and Ti<sub>3</sub>Al intermetallic layers. Increasing in the heat treatment temperature and/or holding time results in an increase in the thickness of both the outer and boundary layers of the coating. A mechanism for the formation of the coating structure via heat treatment is proposed. The scratch test method was used to evaluate the cohesive and adhesive strength of the coatings, and their scratch hardness was determined, which averaged 200 MPa. It was shown that the coating structure formed during heat treatment at 850 °C ensures higher resistance to cohesive failure.https://www.mdpi.com/2075-4701/14/12/1336titaniumaluminumintermetallicshot-dip aluminizingcoatingoxides |
| spellingShingle | Artem Igorevich Bogdanov Vitaliy Pavlovich Kulevich Victor Georgievich Shmorgun Leonid Moiseevich Gurevich Structure and Properties of Ti-Al Intermetallic Coatings Reinforced with an Aluminum Oxide Filler Metals titanium aluminum intermetallics hot-dip aluminizing coating oxides |
| title | Structure and Properties of Ti-Al Intermetallic Coatings Reinforced with an Aluminum Oxide Filler |
| title_full | Structure and Properties of Ti-Al Intermetallic Coatings Reinforced with an Aluminum Oxide Filler |
| title_fullStr | Structure and Properties of Ti-Al Intermetallic Coatings Reinforced with an Aluminum Oxide Filler |
| title_full_unstemmed | Structure and Properties of Ti-Al Intermetallic Coatings Reinforced with an Aluminum Oxide Filler |
| title_short | Structure and Properties of Ti-Al Intermetallic Coatings Reinforced with an Aluminum Oxide Filler |
| title_sort | structure and properties of ti al intermetallic coatings reinforced with an aluminum oxide filler |
| topic | titanium aluminum intermetallics hot-dip aluminizing coating oxides |
| url | https://www.mdpi.com/2075-4701/14/12/1336 |
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