초록

Nanopowders of AlCr2 and Al2O3 were synthesized during high energy ball milling. Densely nanostructured AlCr2-2Al2O3composite was consolidated by high-frequency induction heated sintering within 2 min from milled powders. Highly denseAlCr2-2Al2O3 composite with relative density of up to 96% was produced under application of a 80 MPa pressure and theinduced current. The fracture toughness of a AlCr2-Al2O3 composite in this study is similar to that of previous study, whilethe hardness of a AlCr2-Al2O3 composite in this study is better than that of previous study due to the grain refinement. Thefracture toughness of AlCr2-2Al2O3 composite is higher than that of pure Al2O3. The microstructure and mechanical propertieswere investigated using FE-SEM with EDS and Vickers hardness tester.

키워드

Sintering, Hardness, Nanocrystalline, Fracture toughness, Synthesis

참고문헌(13)open

  1. [단행본] M.F. Ashby / 1986 / Engineering Materials 1(International Series on Materials Science and Technology, Vol.34) / Pergamon Press

  2. [단행본] K. Niihara / 1990 / Advanced structural inorganic composite / Elsevier Scientific Publishing Co.

  3. [학술지] 손인진 / 2015 / Pulsed Current Activated Synthesis and Rapid Consolidation of a Nanostructured Mg2Al4Si5O18 and Its Mechanical Properties / Metals and Materials International 21 (2) : 345 ~ 349

  4. [학술지] 손인진 / 2014 / Mechanochemical Synthesis and Rapid Consolidation of Binderless Nanostructured (Ti,V)C by Pulsed Current Activated Heating and Its Mechanical Properties / 대한금속·재료학회지 52 (5) : 343 ~ 346

  5. [학술지] 손인진 / 2015 / 나노구조 TiC-FeAl 초경재료의 기계적 성질 / 대한금속·재료학회지 53 (7) : 474 ~ 479

  6. [학술지] 권소망 / 2015 / 나노구조의 Ti-TiC 복합재료 소결 및 기계적 성질 / 대한금속·재료학회지 53 (8) : 555 ~ 562

  7. [학술지] 강보람 / 2015 / Mechanical Properties and Rapid Low-temperature Consolidation of Nanocrystalline Cu-ZrO2 Composites by Pulsed Current Activated Heating / Metals and Materials International 21 (4) : 698 ~ 703

  8. [학술지] 강보람 / 2015 / 펄스전류활성 가열에 의한 나노구조의 4Cr-3ZrO2 복합재료 급속소결과 특성 / 대한금속·재료학회지 53 (5) : 320 ~ 325

  9. [학술지] 손인진 / 2015 / Simultaneously rapid synthesis and consolidation of nanostructured Ti-TiC composites from TiH2 and CNT by high-frequency induction heating and their mechanical properties / Journal of Ceramic Processing Research 16 (4) : 422 ~ 427

  10. [학술지] 강현수 / 2014 / 나노구조 (Mo,W)Si2 급속소결과 기계적 특성 / 대한금속·재료학회지 52 (8) : 623 ~ 629

  11. [학술지] 손인진 / 2014 / 펄스전류 활성 소결에 관한 연구 / 대한금속·재료학회지 52 (8) : 573 ~ 580

  12. [단행본] C. Suryanarayana / 1998 / X-ray diffraction:a practical approach / Plenum Press

  13. [학술지] 손인진 / 2006 / Fabrication of ultra-fine TiO2 Ceramics by a high-frequency induction heated sintering method / Journal of Ceramic Processing Research 7 (4) : 327 ~ 331