Mechanical, electrical properties and microstructures of hot-pressed B4C-WB2 composites
Ma, Ke1; Shi, Xiaoguo2; Cao, Xiaozhou3; Yang, Zhibin1; Zuo, Jun1; Xu, Jingjun1; Li, Meishuan1
Corresponding AuthorXu, Jingjun(
AbstractIn this paper, dense B4C-WB2 composites were fabricated at 1950 degrees C using B4C and WB2 as raw materials via a hot press method. The phase composition, microstructures and mechanical properties of the B4C-WB2 composites with different B4C volume fraction were studied. The obtained 68.7 vol%B4C-WB2 composites demonstrated good comprehensive properties with high flexural strength of 696 MPa, superior hardness of 34.8 GPa, and acceptable fracture toughness of 3.3 MPa m1/2. The high flexural strength mainly resulted from the pinning effect of preferentially oriented strip-shape WB2 grains and clean grain interfaces between B4C and WB2 phases. The toughening mechanism of the B4C-WB2 composites was associated with the interfacial residual stress induced by the mismatch of thermal expansion coefficient. In addition, the B4C-WB2 composites demonstrated good electrical conductivity (3.3 x 105 S/m) with a low density of 5.589 g/cm3, making them of potential interest for cutting tools and armor protection applications.
KeywordB4C-WB2 composites Orientation growth Mechanical properties Toughening mechanism Electrical conductivity
Funding OrganizationNational Natural Science Foundation of China
Indexed BySCI
Funding ProjectNational Natural Science Foundation of China[52071318] ; National Natural Science Foundation of China[51472048]
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics
WOS IDWOS:000811248600001
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Cited Times:8[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorXu, Jingjun
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
2.Shandong Acad Sci, Qilu Univ Technol, Sch Environm Sci & Engn, Jinan 250353, Peoples R China
3.Northeastern Univ, Sch Met, Shenyang 110819, Peoples R China
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GB/T 7714
Ma, Ke,Shi, Xiaoguo,Cao, Xiaozhou,et al. Mechanical, electrical properties and microstructures of hot-pressed B4C-WB2 composites[J]. CERAMICS INTERNATIONAL,2022,48(14):20211-20219.
APA Ma, Ke.,Shi, Xiaoguo.,Cao, Xiaozhou.,Yang, Zhibin.,Zuo, Jun.,...&Li, Meishuan.(2022).Mechanical, electrical properties and microstructures of hot-pressed B4C-WB2 composites.CERAMICS INTERNATIONAL,48(14),20211-20219.
MLA Ma, Ke,et al."Mechanical, electrical properties and microstructures of hot-pressed B4C-WB2 composites".CERAMICS INTERNATIONAL 48.14(2022):20211-20219.
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