The Analysis of Resistance to Brittle Cracking of Tungsten Doped TiB<sub>2</sub> Coatings Obtained by Magnetron Sputtering
In this work, the authors present the possibility of characterization of the fracture toughness in mode I (<i>K</i><sub>IC</sub>) for TiB<sub>2</sub> and TiB<sub>2</sub> coatings doped with different concentration of W (3%, 6% and 10%). The Young’s mod...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2020-08-01
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| Series: | Coatings |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2079-6412/10/9/807 |
| Summary: | In this work, the authors present the possibility of characterization of the fracture toughness in mode I (<i>K</i><sub>IC</sub>) for TiB<sub>2</sub> and TiB<sub>2</sub> coatings doped with different concentration of W (3%, 6% and 10%). The Young’s modulus, hardness and fracture toughness of this coatings are extracted from nanoindentation experiments. The fracture toughness was evaluated using calculation of crack length measurement. An important observation is that increasing tungsten concentration in the range 0–10% changes the microstructure of the investigated coatings: from columnar structure for TiB<sub>2</sub> coating to nano-composite structure for Ti-B-W (10%) coating. It can be concluded that doping with concentration 10 at.% W causes an increase of the fracture toughness for the tested coatings. |
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| ISSN: | 2079-6412 |