Microstructure and mechanical properties of h-BN/Yb4Si2O7N2 composites
Chen, Juanjuan1,2; Chen, Jixin1; Zhang, Hao1,3; Hu, Minmin1,3; Li, Meishuan1
Corresponding AuthorChen, Jixin(
AbstractA series of h-BN based composites with Yb4Si2O7N2 as a secondary phase were successfully synthesized by an in situ reaction hot pressing method. It was found that the relative density and room-temperature mechanical properties monotonically increased with increasing the content of Yb4Si2O7N2 from 20 to 50 vol%. When 50 vol% Yb4Si2O7N2 was introduced, the relative density of the composite reached 98.75%, and its flexural strength, compressive strength, fracture toughness, and hardness reached 338 +/- 10 MPa, 803 +/- 49 MPa, 2.06 +/- 0.06 MPam(1/2), and 2.69 +/- 0.10 GPa, respectively. The strengthening effect of Yb4Si2O7N2 was mainly attributed to its high modulus and high hardness. Fine microstructure was also advantageous to strength and could lead to more tortuous crack propagation paths and then improve the fracture toughness of the composites simultaneously. Meanwhile, the composites maintained good machinability.
Keywordh-BN Yb4Si2O7N2 composites microstructure mechanical properties machinability
Funding OrganizationNational Natural Science Foundation of China
Indexed BySCI
Funding ProjectNational Natural Science Foundation of China[50802099] ; National Natural Science Foundation of China[51072201]
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Ceramics
WOS IDWOS:000453768100003
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Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorChen, Jixin
Affiliation1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang, Liaoning, Peoples R China
2.Univ Chinese Acad Sci, Beijing, Peoples R China
3.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang, Liaoning, Peoples R China
Recommended Citation
GB/T 7714
Chen, Juanjuan,Chen, Jixin,Zhang, Hao,et al. Microstructure and mechanical properties of h-BN/Yb4Si2O7N2 composites[J]. JOURNAL OF ADVANCED CERAMICS,2018,7(4):317-324.
APA Chen, Juanjuan,Chen, Jixin,Zhang, Hao,Hu, Minmin,&Li, Meishuan.(2018).Microstructure and mechanical properties of h-BN/Yb4Si2O7N2 composites.JOURNAL OF ADVANCED CERAMICS,7(4),317-324.
MLA Chen, Juanjuan,et al."Microstructure and mechanical properties of h-BN/Yb4Si2O7N2 composites".JOURNAL OF ADVANCED CERAMICS 7.4(2018):317-324.
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