Microstructure, Mechanical and Wear Properties of W-Si-C Composites Consolidated by Spark Plasma Sintering
W-Si-C composites with high relative densities and good mechanical and wear properties were successfully prepared by spark plasma sintering. The influence of SiC content on the relative density, microstructure, mechanical properties and wear characteristics was investigated. The results indicated th...
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| Format: | Article |
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MDPI AG
2023-05-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/13/5/937 |
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| author | Chuanbin Wang Yongxin Cheng Sumeng Hu Kejia Kang Yuzhe Han Xudan Zhang Ronghan Wei Guoqiang Luo |
| author_facet | Chuanbin Wang Yongxin Cheng Sumeng Hu Kejia Kang Yuzhe Han Xudan Zhang Ronghan Wei Guoqiang Luo |
| author_sort | Chuanbin Wang |
| collection | DOAJ |
| description | W-Si-C composites with high relative densities and good mechanical and wear properties were successfully prepared by spark plasma sintering. The influence of SiC content on the relative density, microstructure, mechanical properties and wear characteristics was investigated. The results indicated that the reaction between SiC and W at their interface produced W<sub>2</sub>C and W<sub>5</sub>Si<sub>3</sub>. SiC also reacted with oxygen impurities at the W grain boundary to form SiO<sub>2</sub>. The purification of the grain boundaries of W was carried out by SiO<sub>2</sub> synthesis. Reactive sintering reduces the free energy of the system and facilitates the densification process of W-Si-C composites. This results in a significant increase in the relative density of W-Si-C composites, which reaches a maximum of 98.12%, higher than the 94.32% of pure tungsten. The hardness significantly increases from 4.33 GPa to 8.40 GPa when the SiC content is 2 wt% compared to pure tungsten due to the generation of the hard ceramic phase and the increase in relative density. The wear resistance of the W-Si-C composites was significantly improved with little SiC addition. The wear rate significantly decreased from 313.27 × 10<sup>−3</sup> mm<sup>3</sup>/N·m of pure tungsten to 5.71 × 10<sup>−3</sup> mm<sup>3</sup>/N·m of W-0.5 wt% SiC. SEM analyses revealed that the dominant wear mechanism of pure tungsten was attributed to fatigue wear, while that of W-Si-C composites was due to abrasive wear. |
| first_indexed | 2024-03-11T03:29:48Z |
| format | Article |
| id | doaj.art-98bd9f63e68f47838b8df13340e547dd |
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| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-11T03:29:48Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-98bd9f63e68f47838b8df13340e547dd2023-11-18T02:27:57ZengMDPI AGMetals2075-47012023-05-0113593710.3390/met13050937Microstructure, Mechanical and Wear Properties of W-Si-C Composites Consolidated by Spark Plasma SinteringChuanbin Wang0Yongxin Cheng1Sumeng Hu2Kejia Kang3Yuzhe Han4Xudan Zhang5Ronghan Wei6Guoqiang Luo7Chaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory (Hanjiang Laboratory), Chaozhou 521000, ChinaChaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory (Hanjiang Laboratory), Chaozhou 521000, ChinaChaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory (Hanjiang Laboratory), Chaozhou 521000, ChinaChaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory (Hanjiang Laboratory), Chaozhou 521000, ChinaChaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory (Hanjiang Laboratory), Chaozhou 521000, ChinaChaozhou Branch of Chemistry and Chemical Engineering Guangdong Laboratory (Hanjiang Laboratory), Chaozhou 521000, ChinaSchool of Mechanics and Safety Engineering, Zhengzhou University, Zhengzhou 450001, ChinaState Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, ChinaW-Si-C composites with high relative densities and good mechanical and wear properties were successfully prepared by spark plasma sintering. The influence of SiC content on the relative density, microstructure, mechanical properties and wear characteristics was investigated. The results indicated that the reaction between SiC and W at their interface produced W<sub>2</sub>C and W<sub>5</sub>Si<sub>3</sub>. SiC also reacted with oxygen impurities at the W grain boundary to form SiO<sub>2</sub>. The purification of the grain boundaries of W was carried out by SiO<sub>2</sub> synthesis. Reactive sintering reduces the free energy of the system and facilitates the densification process of W-Si-C composites. This results in a significant increase in the relative density of W-Si-C composites, which reaches a maximum of 98.12%, higher than the 94.32% of pure tungsten. The hardness significantly increases from 4.33 GPa to 8.40 GPa when the SiC content is 2 wt% compared to pure tungsten due to the generation of the hard ceramic phase and the increase in relative density. The wear resistance of the W-Si-C composites was significantly improved with little SiC addition. The wear rate significantly decreased from 313.27 × 10<sup>−3</sup> mm<sup>3</sup>/N·m of pure tungsten to 5.71 × 10<sup>−3</sup> mm<sup>3</sup>/N·m of W-0.5 wt% SiC. SEM analyses revealed that the dominant wear mechanism of pure tungsten was attributed to fatigue wear, while that of W-Si-C composites was due to abrasive wear.https://www.mdpi.com/2075-4701/13/5/937W-Si-C compositesspark plasma sinteringinterface reactionmechanical propertieswear characteristics |
| spellingShingle | Chuanbin Wang Yongxin Cheng Sumeng Hu Kejia Kang Yuzhe Han Xudan Zhang Ronghan Wei Guoqiang Luo Microstructure, Mechanical and Wear Properties of W-Si-C Composites Consolidated by Spark Plasma Sintering Metals W-Si-C composites spark plasma sintering interface reaction mechanical properties wear characteristics |
| title | Microstructure, Mechanical and Wear Properties of W-Si-C Composites Consolidated by Spark Plasma Sintering |
| title_full | Microstructure, Mechanical and Wear Properties of W-Si-C Composites Consolidated by Spark Plasma Sintering |
| title_fullStr | Microstructure, Mechanical and Wear Properties of W-Si-C Composites Consolidated by Spark Plasma Sintering |
| title_full_unstemmed | Microstructure, Mechanical and Wear Properties of W-Si-C Composites Consolidated by Spark Plasma Sintering |
| title_short | Microstructure, Mechanical and Wear Properties of W-Si-C Composites Consolidated by Spark Plasma Sintering |
| title_sort | microstructure mechanical and wear properties of w si c composites consolidated by spark plasma sintering |
| topic | W-Si-C composites spark plasma sintering interface reaction mechanical properties wear characteristics |
| url | https://www.mdpi.com/2075-4701/13/5/937 |
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