Diamond | PCD (Diamond sintered body) |
Sapphire/Ruby | Cemented carbide | Alumina | Zirconia | Quartz glass | ||
---|---|---|---|---|---|---|---|---|
Physical Properties | Chemical Composition | C | C+バインダー | Al2O3 | WC+Co | Al2O3 | ZrO2 | SiO2 |
Density | 3.515 | 3.9~4.1 | 3.98 | 14.7~15.1 | 3.6~4.1 | 6.0~6.1 | 2.2 | |
Crystal System | Cubic | Sintered body | Hexagonal | Sintered body | Sintered body | Sintered body | Amorphous | |
Mechanical Properties | Tensile Strength GPa |
1~4 | 1.3 | 0.5 | 0.8~1.7 | 0.12~0.21 | 0.14 | 0.05 |
Bending Strength GPa |
N.A. | 1.1~2.6 | 0.5~0.7 | 2.4~2.6 | 0.2~0.7 | 0.8~1.7 | 0.06 | |
Compressive Strength GPa |
6~11 | 6.9~7.6 | 3.0~3.4 | 6.1 | 2.5~4.4 | 2.9~3.9 | 1.1 | |
Young’s Modulus GPa |
1,000~1,100 | 776~920 | 350~470 | 620~640 | 260~380 | 180~220 | 72~82 | |
Hardness | HK 6,000~11,000 | HV 6,000~12,000 | HK 1,500~2,000 | HK 1,700 | HV 1,000~2,300 | HV 1,200~1,500 | HK 590~620 | |
Thermal Properties | Thermal conductivity W/(m・K) |
600~2,000 | 400~500 | 40 | 80 | 17~33 | 1.7~2.9 | 1.3 |
Coefficient of Linear Expansion 10-6/K |
1~4 | 4~6 | 5~9 | 5 | 7~8 | 8~10 | 0.4~0.6 | |
Electrical Properties | Electric Resistivity Ω・m |
106~1018 | 1.4×10-4 (Useable for EDM) |
106~1013 | 10-7 | 1012~ | 1012~ | 1012~ |
Optical Properties | Refractive Index (589.3nm) |
2.417 | -- | C軸⊥ 1.768 | -- | -- | -- | 1.458 |
C軸∥ 1.760 |
Conversion Expressions: 1kgf/mm2=0.0098GPa、1dyn/cm2=0.1Pa、1cal/(cm・sec・℃)=418.4W/(m・K)
※The above properties are not guaranteed. These data should not be specified as engineering requirements or used for design purposes.