Microstructure and Wear Behavior of In-Situ NbC Reinforced Composite Coatings
In the present study, plasma spray welding was used to prepare an in-situ niobium carbide (NbC) reinforced Ni-based composite coating on the low carbon steel, and the phase composition and the microstructure of the composite coatings were studied. The wear resistance and the wear mechanism of the co...
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MDPI AG
2020-08-01
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| Online Access: | https://www.mdpi.com/1996-1944/13/16/3459 |
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| author | Baoming Shi Shiming Huang Ping Zhu Changen Xu Tengfei Zhang |
| author_facet | Baoming Shi Shiming Huang Ping Zhu Changen Xu Tengfei Zhang |
| author_sort | Baoming Shi |
| collection | DOAJ |
| description | In the present study, plasma spray welding was used to prepare an in-situ niobium carbide (NbC) reinforced Ni-based composite coating on the low carbon steel, and the phase composition and the microstructure of the composite coatings were studied. The wear resistance and the wear mechanism of the composite coatings were also researched by the wear tests. The results showed that the main phases of the composite coating were NbC, γ-Ni, Cr<sub>23</sub>C<sub>6</sub>, Ni<sub>3</sub>Si, CrB, Cr<sub>5</sub>B<sub>3</sub>, Cr<sub>7</sub>C<sub>3</sub> and FeNi<sub>3</sub>. A number of fine in-situ NbC particles and numerous chromium carbide particles were distributed in the γ-Ni matrix. The increase in the mass fraction of Nb and NiCr-Cr<sub>3</sub>C<sub>2</sub> could lead to the increase in NbC particles in the composite coatings. Due to the high hardness of NbC and chromium carbides, the micro-hardness and the wear resistance of the composite coatings were advanced. The composite coating with the powder mixtures of 20% (Nb + NiCr-Cr<sub>3</sub>C<sub>2</sub>) and 80% NiCrBSi had the highest micro-hardness and the best wear resistance in this study. The average micro-hardness reached the maximum value 1025HV<sub>0.5</sub>. The volume loss was 39.2 mm<sup>3</sup>, which was merely 37% of that of the NiCrBSi coating and 6% of that of the substrate under the identical conditions. |
| first_indexed | 2024-03-10T17:55:07Z |
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| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-10T17:55:07Z |
| publishDate | 2020-08-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-a9fd0647363948b3a4b867b59659b14a2023-11-20T09:12:56ZengMDPI AGMaterials1996-19442020-08-011316345910.3390/ma13163459Microstructure and Wear Behavior of In-Situ NbC Reinforced Composite CoatingsBaoming Shi0Shiming Huang1Ping Zhu2Changen Xu3Tengfei Zhang4School of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, ChinaSchool of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, ChinaSchool of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, ChinaSchool of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, ChinaSchool of Materials Science and Engineering, Dalian Jiaotong University, Dalian 116028, ChinaIn the present study, plasma spray welding was used to prepare an in-situ niobium carbide (NbC) reinforced Ni-based composite coating on the low carbon steel, and the phase composition and the microstructure of the composite coatings were studied. The wear resistance and the wear mechanism of the composite coatings were also researched by the wear tests. The results showed that the main phases of the composite coating were NbC, γ-Ni, Cr<sub>23</sub>C<sub>6</sub>, Ni<sub>3</sub>Si, CrB, Cr<sub>5</sub>B<sub>3</sub>, Cr<sub>7</sub>C<sub>3</sub> and FeNi<sub>3</sub>. A number of fine in-situ NbC particles and numerous chromium carbide particles were distributed in the γ-Ni matrix. The increase in the mass fraction of Nb and NiCr-Cr<sub>3</sub>C<sub>2</sub> could lead to the increase in NbC particles in the composite coatings. Due to the high hardness of NbC and chromium carbides, the micro-hardness and the wear resistance of the composite coatings were advanced. The composite coating with the powder mixtures of 20% (Nb + NiCr-Cr<sub>3</sub>C<sub>2</sub>) and 80% NiCrBSi had the highest micro-hardness and the best wear resistance in this study. The average micro-hardness reached the maximum value 1025HV<sub>0.5</sub>. The volume loss was 39.2 mm<sup>3</sup>, which was merely 37% of that of the NiCrBSi coating and 6% of that of the substrate under the identical conditions.https://www.mdpi.com/1996-1944/13/16/3459in-situcomposite coatingmicrostructureNbCwear resistance |
| spellingShingle | Baoming Shi Shiming Huang Ping Zhu Changen Xu Tengfei Zhang Microstructure and Wear Behavior of In-Situ NbC Reinforced Composite Coatings Materials in-situ composite coating microstructure NbC wear resistance |
| title | Microstructure and Wear Behavior of In-Situ NbC Reinforced Composite Coatings |
| title_full | Microstructure and Wear Behavior of In-Situ NbC Reinforced Composite Coatings |
| title_fullStr | Microstructure and Wear Behavior of In-Situ NbC Reinforced Composite Coatings |
| title_full_unstemmed | Microstructure and Wear Behavior of In-Situ NbC Reinforced Composite Coatings |
| title_short | Microstructure and Wear Behavior of In-Situ NbC Reinforced Composite Coatings |
| title_sort | microstructure and wear behavior of in situ nbc reinforced composite coatings |
| topic | in-situ composite coating microstructure NbC wear resistance |
| url | https://www.mdpi.com/1996-1944/13/16/3459 |
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