Journal of Advanced Ceramics

, Volume 7, Issue 4, pp 317–324 | Cite as

Microstructure and mechanical properties of h-BN/Yb4Si2O7N2 composites

  • Juanjuan Chen
  • Jixin ChenEmail author
  • Hao Zhang
  • Minmin Hu
  • Meishuan Li
Open Access
Research Article


A 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 MPa·m1/2, 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.


h-BN/Yb4Si2O7N2 composites microstructure mechanical properties machinability 



This work was supported by the National Natural Science Foundation of China under Grant Nos. 50802099 and 51072201.


  1. [1]
    Sinclair W, Simmons H. Microstructure and thermal shock behaviour of BN composites. J Mater Sci Lett 1987, 6: 627–629.CrossRefGoogle Scholar
  2. [2]
    Lipp A, Schwetz KA, Hunold K. Hexagonal boron nitride: Fabrication, properties and applications. J Eur Ceram Soc 1989, 5: 3–9.CrossRefGoogle Scholar
  3. [3]
    Zhang G-J, Yang J-F, Ohji T, et al. In-situ reaction synthesis of non-oxide boron nitride composites. Adv Eng Mater 2002, 4: 15–17.CrossRefGoogle Scholar
  4. [4]
    Eichler J, Lesniak C. Boron nitride (BN) and BN composites for high-temperature applications. J Eur Ceram Soc 2008, 28: 1105–1109.CrossRefGoogle Scholar
  5. [5]
    Zhang X, Zhang R, Chen G, et al. Microstructure, mechanical properties and thermal shock resistance of hot-pressed ZrO2(3Y)–BN composites. Mat Sci Eng A 2008, 497: 195–199.CrossRefGoogle Scholar
  6. [6]
    Liang F, Xue Z, Zhao L, et al. Mechanical properties and thermal shock resistance of alumina/hexagonal boron nitride composite refractories. Metall and Mat Trans A 2015, 46: 4335–4341.CrossRefGoogle Scholar
  7. [7]
    Rusanova LN, Romashln AG, Kullkova GI, et al. Boron nitride ceramics: Problems and development perspectives. Powder Metall Met Ceram 1988, 27: 21–28.CrossRefGoogle Scholar
  8. [8]
    Zhang G-J, Yang J-F, Andoa M, et al. Nonoxide-boron nitride composites: in situ synthesis, microstructure and properties. J Eur Ceram Soc 2002, 22: 2551–2554.CrossRefGoogle Scholar
  9. [9]
    Haubner R, Wilhelm M, Weissenbacher R, et al. Boron nitrides—Properties, synthesis and applications. In: High Performance Non-Oxide Ceramics II. Structure and Bonding, Vol. 102. Jansen M, Ed. Springer Berlin Heidelberg, 2002: 1–45.CrossRefGoogle Scholar
  10. [10]
    Li Y, Wu H, Yin J, et al. High electrical resistivity of pressureless sintered in situ SiC.BN composites. Scripta Mater 2013, 69: 740–743.CrossRefGoogle Scholar
  11. [11]
    Frederikse HPR, Kahn AH, Dargoo AL, et al. Electrical resistivity and microwave transmission of hexagonal boron nitride. J Am Ceram Soc 1985, 68: 131–135.CrossRefGoogle Scholar
  12. [12]
    Jin H-Y, Xu H, Qiao G-J, et al. Study of machinable silicon carbide–boron nitride ceramic composites. Mat Sci Eng A 2008, 483–484: 214–217.CrossRefGoogle Scholar
  13. [13]
    Zhong B, Zhao GL, Huang XX, et al. Microstructure and mechanical properties of ZTA/BN machinable ceramics fabricated by reactive hot pressing. J Eur Ceram Soc 2015, 35: 641–649.CrossRefGoogle Scholar
  14. [14]
    Li Y, Yin J, Wu H, et al. Enhanced electrical resistivity in SiC–BN composites with highly-active BN nanoparticles synthesized via chemical route. J Eur Ceram Soc 2015, 35: 1647–1652.CrossRefGoogle Scholar
  15. [15]
    MatWeb, The online materials database, GE advanced ceramics HBN hot-pressed boron nitride. Available at
  16. [16]
    Trice RW, Halloran JW. Investigation of the physical and mechanical properties of hot-pressed boron nitride/oxide ceramic composites. J Am Ceram Soc 1999, 82: 2563–2565.CrossRefGoogle Scholar
  17. [17]
    Tian Z, Jia DC, Duan XM, et al. Effects of AlN content on phase composition, microstructure and mechanical properties of BN-based composite ceramics. J Chin Ceram Soc 2013, 41: 1603–1608. (in Chinese)Google Scholar
  18. [18]
    Zhang X. Preparation and properties of rare earth silicate (RE2SiO5, RE2Si2O7, RE = Y, Yb) modified boron nitride matrix composites. Ph.D. Thesis. Shenyang, China: Institute of Metal Research, Chinese Academy of Sciences, 2015. (in Chinese)Google Scholar
  19. [19]
    Zhang X, Chen J, Zhang J, et al. High-temperature mechanical and thermal properties of h-BN/30 vol%Y2SiO5 composite. Ceram Int 2015, 41: 10891–10896.CrossRefGoogle Scholar
  20. [20]
    Zhang X, Chen J, Li X, et al. Microstructure and mechanical properties of h-BN/Y2SiO5 composites. Ceram Int 2015, 41: 1279–1283.CrossRefGoogle Scholar
  21. [21]
    Chen L, Chen JX. Thermal shock resistance of Y4Si2O7N2–BN composites. J Henan Normal Univ: Nat Sci Ed 2011, 39: 70–72. (in Chinese)Google Scholar
  22. [22]
    Takahashi J, Yamane H, Shimada M, et al. Crystal structure of Lu4Si2O7N2 analyzed by the Rietveld method using the time-of-flight neutron powder diffraction pattern. J Am Ceram Soc 2002, 85: 2072–2077.CrossRefGoogle Scholar
  23. [23]
    Takahashi J, Yamane H, Hirosaki N, et al. Crystal structure of rare-earth silicon-oxynitride J-phases, Ln4Si2O7N2. J Eur Ceram Soc 2005, 25: 793–799.CrossRefGoogle Scholar
  24. [24]
    Park H, Kim H-E, Niihara K. Microstructural evolution and mechanical properties of Si3N4 with Yb2O3 as a sintering additive. J Am Ceram Soc 1997, 80: 750–756.CrossRefGoogle Scholar
  25. [25]
    Nishimura T, Mitomo M. Phase relationships in the system Si3N4–SiO2–Yb2O3. J Mater Res 1995, 10: 240–242.CrossRefGoogle Scholar
  26. [26]
    Nishimura T, Mitomo M, Suematsu H. High temperature strength of silicon nitride ceramics with ytterbium silicon oxynitride. J Mater Res 1997, 12: 203–209.CrossRefGoogle Scholar
  27. [27]
    Lu H-H, Huang J-L. Effect of Y2O3 and Yb2O3 on the microstructure and mechanical properties of silicon nitride. Ceram Int 2001, 27: 621–628.CrossRefGoogle Scholar
  28. [28]
    Guo S, Hirosaki N, Nishimura T, et al. Compressive creep behaviour of Yb4Si2O7N2 containing silicon nitride ceramic between 1400 and 1500. Mater Sci Technol 2003, 19: 544–548.CrossRefGoogle Scholar
  29. [29]
    Wen G, Wu GL, Lei TQ, et al. Co-enhanced SiO2–BN ceramics for high-temperature dielectric applications. J Eur Ceram Soc 2000, 20: 1923–1928.CrossRefGoogle Scholar
  30. [30]
    Coble RL, Kingery WD. Effect of porosity on physical properties of sintered alumina. J Am Ceram Soc 1956, 39: 377–385.CrossRefGoogle Scholar
  31. [31]
    Özcan S, Açıkbaş G, Özbay N, et al. The effect of silicon nitride powder characteristics on SiAlON microstructures, densification and phase assemblage. Ceram Int 2017, 43: 10057–10065.CrossRefGoogle Scholar
  32. [32]
    Chen L. Synthesis, microstructure, and properties of Y4Si2O7N2–BN composites. M.Sc. Thesis. Shenyang, China: Institute of Metal Research, Chinese Academy of Sciences, 2011. (in Chinese)Google Scholar
  33. [33]
    Duan X, Jia D, Zhou Y, et al. Mechanical properties and plasma erosion resistance of BNp/Al2O3–SiO2 composite ceramics. J Cent South Univ 2013, 20: 1462–1468.CrossRefGoogle Scholar
  34. [34]
    Calis Acikbas N, Kumar R, Kara F, et al. Influence of β-Si3N4 particle size and heat treatment on microstructural evolution of α:β-SiAlON ceramics. J Eur Ceram Soc 2011, 31: 629–635.CrossRefGoogle Scholar
  35. [35]
    Li S, Xie J, Zhao J, et al. Mechanical properties and mechanism of damage tolerance for Ti3SiC2. Mater Lett 2002, 57: 119–123.CrossRefGoogle Scholar
  36. [36]
    Sun Z, Wang J, Li M, et al. Mechanical properties and damage tolerance of Y2SiO5. J Eur Ceram Soc 2008, 28: 2895–2901.CrossRefGoogle Scholar

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© The Author(s) 2018

Open Access The articles published in this journal are distributed under the terms of the Creative Commons Attribution 4.0 International License (, which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made

Authors and Affiliations

  • Juanjuan Chen
    • 1
    • 2
  • Jixin Chen
    • 1
    Email author
  • Hao Zhang
    • 1
    • 3
  • Minmin Hu
    • 1
    • 3
  • Meishuan Li
    • 1
  1. 1.Shenyang National Laboratory for Materials Science, Institute of Metal ResearchChinese Academy of SciencesShenyangChina
  2. 2.University of Chinese Academy of SciencesBeijingChina
  3. 3.School of Materials Science and EngineeringUniversity of Science and Technology of ChinaShenyangChina

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