표제지
국문초록
목차
1. 서론 11
2. 실험 방법 14
3. 결과 및 고찰 19
3.1. SiC-TiB₂ 복합재료의 밀도, 상 분석 및 미세조직 19
3.2. SiC-TiB₂ 복합재료의 기계적 물성 30
3.2.1. 굴곡강도 30
3.2.2. 파괴인성 38
3.2.3. 경도 42
3.3. SiC-TiB₂ 복합재료의 전기비저항 44
3.4. SiC-TiB₂ 복합재료의 열전도도 49
4. 결론 52
참고문헌 55
Abstract 66
Table 1. Batch composition, theoretical density, and relative density of pressureless solid-state sintered SiC-TiB₂ composites ceramics. 21
Table 2. SiC polytype content of pressureless sintered SiC-TiB₂ composites ceramics. 24
Table 3. Average grain size of pressureless sintered SiC-TiB₂ composites. 29
Table 4. Mechanical properties of pressureless sintered SiC-TiB₂ composites. 36
Table 5. Electrical and thermal properties of SiC-TiB₂ composites. 47
Fig. 1. Definition of thickness, length, and aspect ratio of SiC grains in two-dimensional image. 18
Fig. 2. Relative density of pressureless sintered SiC-TiB₂ composites sintered with 0-30 wt% TiB₂. 22
Fig. 3. XRD patterns of pressureless sintered SiC-TiB₂ composites: (a) ST0, (b) ST10, (c) ST20, and (d) ST30. 23
Fig. 4. Typical microstructures of pressureless solid-state sintered SiC-TiB₂ composites: (a) ST0, (b) ST10, (c) ST20 and (d) ST30. 27
Fig. 5. Typical microstructures of etched pressureless solid-state sintered SiC-TiB₂ composites: (a) ST0, (b) ST10, (c) ST15 and (d) ST20. 28
Fig. 6. Flexural strength of pressureless sintered SiC-TiB₂ composites ceramics. The error bars correspond to standard deviation about the... 33
Fig. 7. Typical fracture surfaces of pressureless sintered SiC-TiB₂ composites: (a) ST0, (b) ST10, (c) ST20, and (d) ST30. 34
Fig. 8. Typical fracture origins of pressureless sintered SiC-TiB₂ composites ceramics; (a) ST10, and (b) ST30. 35
Fig. 9. Fracture Toughness of pressureless sintered SiC-TiB₂ composites. The error bars correspond to standard deviation about... 40
Fig. 10. SEM images of the crack path from a Vickers indentation in the (a) ST0 and (b) ST30 specimens. 41
Fig. 11. Vickers hardness of pressureless sintered SiC-TiB₂ composites as a function of TiB₂ content. The error bars correspond to standard... 43
Fig. 12. Electrical resistivity of pressureless sintered SiC-TiB₂ composites as a function of TiB₂ content as a function of TiB₂ content. 46
Fig. 13. Thermal conductivity of pressureless sintered SiC-TiB₂ composites as a function of TiB₂ content. 51