Journal of the Korean Ceramic Society (한국세라믹학회지)

The Korean Ceramic Society (한국세라믹학회)
권호 표지

Effect of Atmosphere and Composition on the Fabrication of $TiB_2$-AlN-BN Composites by Reactive Hot Pressing

소결 분위기와 조성이 $TiB_2$-AlN-BN 복합체의 반응 가압 소결에 미치는 영향

  • 이기민 (한국과학기술연구원 복합기능세라믹스센터) ;
  • 김형종 (한국과학기술연구원 복합기능세라믹스센터) ;
  • 최헌진 (한국과학기술연구원 복합기능세라믹스센터) ;
  • 이준근 (한국과학기술연구원 복합기능세라믹스센터)
  • Published : 2000.07.01
Download PDF
⟨ Previous Next ⟩

Abstract

Effects of the chemical composition and sintering atmosphere on the formation of reaction phases and physical properties of reactive hot-pressed TiB2-AlN-BN composites were investigated. At N2 atmosphere, TiN was formed by the reaction between Ti and N2, which inhibited the densification and results in inferior mechanical-and electrical properties of the composites. However, at Ar atmosphere, enhanced densification and physical properties of composites were obtained due to that the TiN formation reaction was excluded. Densification of the composites was also hindered by BN, therefore, inferior mechanical-and electrical properties of composites were obtained with amount of BN in the starting materials. At Ar atmosphere, TiB2-AlN-BN composites having 318 MPa of flexural strength, 3.5 MPa.m1/2 of fracture toughness and 276$\mu$Ω.cm of electrical resistivity were fabricated from mole ratio 1:2:1.6 of Ti-Al-BN mixtures.

Keywords

References

  1. J. Am. Ceram. Soc. v.79 no.1 Combustion Synthesis/Dynamic Densification of TiB₂-SiC Composite D. A. Hoke;D. K. Kim;J. C. LaSalvia;M. A. Meyers
  2. J. Am. Ceram. Soc. v.67 no.7 Mechanical Properties of Densely Sintered High Purity Titanium Diboride in Molten Aluminium Environments H. R. Baumgartner
  3. J. Am. Ceram. Soc. v.68 no.11 Role of Microstructure and Intergranular Phase in Corrosion of TiB₂Exposed to Liquid Aluminium W. A. Zdaniewski
  4. J. Eur. Ceram. Soc. v.17 Studies of the Mechanical Properties of TiB₂-6%TaB₂-1%CoB-x%mZrO₂ V. C. Kokabi;K. Shobu;T.Watanabe
  5. J. Mater. Res. v.12 Investigation of NiAl-TiB₂In situ Composites J. T. Guo;Z. P. Xing
  6. Ceram. Eng. Sci. Proc. v.10 no.7 Preparation and Processing of Platelet-Reinforced Ceramics by the Directed Reaction of Zirconium with Boron Carbide W. B. Johnson;T. D. Claar;G. H. Schiroky
  7. Ceram. Eng. Sci. Proc. v.10 no.7 Microstructure and Properties of Platelet-Reinforced Ceramics Formed by the Directed Reaction of Zirconium with Boron Carbide W. B. Johnson;T. D. Claar;G. H. Schiroky
  8. J. Mater. Proc. Tech. v.63 Microstructure and Mechanical Properties of NiAl Intermetallic Compound Synthesized by Reactive Sintering under Pressure K. Matsuura;T. Kitamutra;M. Kudoh
  9. J. Mater. Sci. v.10 Equilibrium Penny-like Cracks in Indentation Fracture B. R. Lawn;E. R. Fuller
  10. JANEF Thermalchemical Tables 3rd Ed. M. W. Chase, Jr.;C. A. Davies;J. R. Downey, Jr.;D. J. Frurip;R. A. Mc Donald;A. N. Syverud
  11. J. Applied Phys. v.42 Influence of Particle Size on the Electrical Resistivity of Compacted Mixtures of Polymeric and Metallic Powders A. Malliaris;D. T. Turner
  12. Acta Metall. v.31 Crack Deflection Processes-I. Theory K. T. Faber;A. G. Evans
  13. Acta Metall v.31 Crack Deflection Processes-II. Experiment K. T. Faber;A. G. Evans