Effect of TiBCN Content on Microstructure and Properties of Laser Cladding Ti/TiBCN Composite Coatings
| Autor: | Su Keqiang, Wenbo Du, Hongwen Su, Bin Liu, Yuxin Li, Liyun Wu, Peikang Bai |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
020502 materials Composite number Metals and Alloys 02 engineering and technology Substrate (electronics) Condensed Matter Physics Microstructure Indentation hardness Corrosion 0205 materials engineering Mechanics of Materials Whisker Materials Chemistry Lamellar structure Composite material Layer (electronics) |
| Zdroj: | Metals and Materials International. 25:1366-1377 |
| ISSN: | 2005-4149 1598-9623 |
| DOI: | 10.1007/s12540-019-00287-2 |
| Popis: | The Ti/TiBCN composite coatings were fabricated on the substrate of Ti6Al4V alloy by laser cladding. The effects of TiBCN content on the microstructre, microhardness, corrosion resistance and tribological properties of the composite coatings were studied. The results showed that, when the TiBCN content was 60 wt%, the composite coatings were mainly composed of the dendritic and rod-shaped TiBCN phases, small white lump TiC phases, fine lamellar TiN phases, small and scattered white block TiB2 phases, In addition, there was a small quantity of short whisker Al3Ti phases and uniform layer block TiAl phases. Furhtermore, the maximum microhardness was 1596 HV, which was about 4.6 folds greater than that of the substrate; the corrosion potential (Ecorr) reached − 1.258 V and the corrosion current density (Icorr) was 4.035 × 10−5 A/cm2, which was one order lower than that of the substrate (1.172 × 10−4 A/cm2); the worn surface was relatively smooth and the mass loss (1.22 g) was only 9/50 of that of the substrate (6.71 g). |
| Databáze: | OpenAIRE |
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