Zhang Hai, Wu Zihao, Chen Hao, HE Yuqi, Zhang Shunli, Yuan Zhenwei, Zhang Shubo, Hai Wanxiu
{"title":"高熵碳化物陶瓷(VNbTaMoW) C5-SiC的微观结构、力学和摩擦学性能","authors":"Zhang Hai, Wu Zihao, Chen Hao, HE Yuqi, Zhang Shunli, Yuan Zhenwei, Zhang Shubo, Hai Wanxiu","doi":"10.1007/s11106-023-00332-1","DOIUrl":null,"url":null,"abstract":"<div><div><p>The (VNbTaMoW)C<sub>5</sub>–SiC high-entropy ceramics were prepared by spark plasma sintering at 1900°C and 40 MPa. The effects of SiC content (0–30 wt.%) on the microstructure, mechanical properties, and tribological properties were examined. The results showed that the matrix phase (VNbTaMoW)C<sub>5</sub> exhibited a face-centered cubic structure, and the second phase (SiC) was uniformly distributed, inhibiting excessive grain growth. The relative density of (VNbTaMoW)C<sub>5</sub>– SiC composite ceramics decreased first and then dropped as SiC content increased. The fracture mode of (VNbTaMoW)C<sub>5</sub>–SiC composite ceramics changed from transgranular to mixed (transgranular fracture and intergranular) fracture with an increase in SiC content due to weak bonding between (VNbTaMoW)C<sub>5</sub> and SiC. The grains of the (VNbTaMoW)C<sub>5</sub> in multiphase ceramics were refined because of the grain growth-inhibiting effect of SiC. With the increase in SiC content, the hardness of (VNbTaMoW)C<sub>5</sub>–SiC multiphase ceramics increased, and the fracture toughness first increased and then decreased. The (VNbTaMoW)C<sub>5</sub>–20 wt.% SiC multiphase ceramics exhibited the best mechanical properties with Vickers' hardness and fracture toughness of 18.2 GPa and 5.7 MPa ∙ m<sup>1/2</sup>, respectively. Coupled with WC, (VNbTaMoW)C<sub>5</sub>–SiC multiphase ceramics exhibit good wear resistance with a specific wear rate of (5.7–8.1) ∙ 10<sup>–8</sup> mm<sup>3</sup>/N ∙ m.</p></div></div>","PeriodicalId":742,"journal":{"name":"Powder Metallurgy and Metal Ceramics","volume":null,"pages":null},"PeriodicalIF":0.9000,"publicationDate":"2023-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":"{\"title\":\"Microstructure, Mechanical and Tribological Properties of High-Entropy Carbide Ceramics (VNbTaMoW)C5–SiC\",\"authors\":\"Zhang Hai, Wu Zihao, Chen Hao, HE Yuqi, Zhang Shunli, Yuan Zhenwei, Zhang Shubo, Hai Wanxiu\",\"doi\":\"10.1007/s11106-023-00332-1\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><div><p>The (VNbTaMoW)C<sub>5</sub>–SiC high-entropy ceramics were prepared by spark plasma sintering at 1900°C and 40 MPa. The effects of SiC content (0–30 wt.%) on the microstructure, mechanical properties, and tribological properties were examined. The results showed that the matrix phase (VNbTaMoW)C<sub>5</sub> exhibited a face-centered cubic structure, and the second phase (SiC) was uniformly distributed, inhibiting excessive grain growth. The relative density of (VNbTaMoW)C<sub>5</sub>– SiC composite ceramics decreased first and then dropped as SiC content increased. The fracture mode of (VNbTaMoW)C<sub>5</sub>–SiC composite ceramics changed from transgranular to mixed (transgranular fracture and intergranular) fracture with an increase in SiC content due to weak bonding between (VNbTaMoW)C<sub>5</sub> and SiC. The grains of the (VNbTaMoW)C<sub>5</sub> in multiphase ceramics were refined because of the grain growth-inhibiting effect of SiC. With the increase in SiC content, the hardness of (VNbTaMoW)C<sub>5</sub>–SiC multiphase ceramics increased, and the fracture toughness first increased and then decreased. The (VNbTaMoW)C<sub>5</sub>–20 wt.% SiC multiphase ceramics exhibited the best mechanical properties with Vickers' hardness and fracture toughness of 18.2 GPa and 5.7 MPa ∙ m<sup>1/2</sup>, respectively. Coupled with WC, (VNbTaMoW)C<sub>5</sub>–SiC multiphase ceramics exhibit good wear resistance with a specific wear rate of (5.7–8.1) ∙ 10<sup>–8</sup> mm<sup>3</sup>/N ∙ m.</p></div></div>\",\"PeriodicalId\":742,\"journal\":{\"name\":\"Powder Metallurgy and Metal Ceramics\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.9000,\"publicationDate\":\"2023-02-02\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"1\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Powder Metallurgy and Metal Ceramics\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s11106-023-00332-1\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"MATERIALS SCIENCE, CERAMICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Powder Metallurgy and Metal Ceramics","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.1007/s11106-023-00332-1","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, CERAMICS","Score":null,"Total":0}
Microstructure, Mechanical and Tribological Properties of High-Entropy Carbide Ceramics (VNbTaMoW)C5–SiC
The (VNbTaMoW)C5–SiC high-entropy ceramics were prepared by spark plasma sintering at 1900°C and 40 MPa. The effects of SiC content (0–30 wt.%) on the microstructure, mechanical properties, and tribological properties were examined. The results showed that the matrix phase (VNbTaMoW)C5 exhibited a face-centered cubic structure, and the second phase (SiC) was uniformly distributed, inhibiting excessive grain growth. The relative density of (VNbTaMoW)C5– SiC composite ceramics decreased first and then dropped as SiC content increased. The fracture mode of (VNbTaMoW)C5–SiC composite ceramics changed from transgranular to mixed (transgranular fracture and intergranular) fracture with an increase in SiC content due to weak bonding between (VNbTaMoW)C5 and SiC. The grains of the (VNbTaMoW)C5 in multiphase ceramics were refined because of the grain growth-inhibiting effect of SiC. With the increase in SiC content, the hardness of (VNbTaMoW)C5–SiC multiphase ceramics increased, and the fracture toughness first increased and then decreased. The (VNbTaMoW)C5–20 wt.% SiC multiphase ceramics exhibited the best mechanical properties with Vickers' hardness and fracture toughness of 18.2 GPa and 5.7 MPa ∙ m1/2, respectively. Coupled with WC, (VNbTaMoW)C5–SiC multiphase ceramics exhibit good wear resistance with a specific wear rate of (5.7–8.1) ∙ 10–8 mm3/N ∙ m.
期刊介绍:
Powder Metallurgy and Metal Ceramics covers topics of the theory, manufacturing technology, and properties of powder; technology of forming processes; the technology of sintering, heat treatment, and thermo-chemical treatment; properties of sintered materials; and testing methods.