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99 Alumina Ceramic Custom Finishing
Machining Ceramic Parts and Components
Machining ceramic parts and components involves shaping and finishing ceramic materials using various cutting tools and techniques. Ceramics are hard, brittle, and have low fracture toughness, making them challenging to machine compared to metals. However, due to their exceptional properties such as high temperature resistance, wear resistance, and corrosion resistance, ceramics are widely used in various industries, including aerospace, automotive, medical, and electronics.
The machining of ceramics requires specialized equipment and techniques to overcome their inherent brittleness and achieve precise results. Some of the commonly used machining processes for ceramics include:
Grinding: This is the most common method for machining ceramics. It involves using abrasive wheels or belts to remove material and achieve the desired shape and surface finish.
Diamond Turning: This process utilizes single-point diamond cutting tools to achieve high precision and surface quality. It is often used for machining complex shapes and features.
Electrical Discharge Machining (EDM): EDM is a non-contact machining process that uses electrical discharges to erode material from the workpiece. It is particularly useful for machining intricate shapes and features that are difficult to achieve with conventional machining methods.
Laser Machining: This process uses a focused laser beam to melt and vaporize material from the workpiece. It is suitable for high-precision cutting and drilling of ceramics.
Waterjet Machining: Waterjet machining utilizes a high-pressure stream of water mixed with abrasive particles to cut and shape ceramic materials. It is a versatile process that can be used for a wide range of materials and thicknesses.
Properties of Alumina material (Al2O3)
Property | Item | 95% Al2O3 | 99% Al2O3 | 99.8%Al2O3 | Unit |
Mechanical Characteristics | Color | White | light yellow | Ivory | |
Bulk Density | 3.7 | 3.85 | 3.93 | g/cm3 | |
Water Absorption | 0 | 0 | 0 | % | |
Bending Strength | 300 | 310 | 370 | MPa | |
Compressive Trength | 2,300 | 2,400 | 2500 | MPa | |
Elastic Modulus | 320 | 340 | 390 | GPa | |
Fracture Toughness | 3~4 | 3~4 | 4 | MPa m1/2 | |
Weber Coefficient | 12 | 12 | 12 | m | |
Vickers Hardness | 1,400 | 1,600 | 1850 | HV 0.5 | |
Thermal Characterics | Coefficient of Line Thermal Expansion | 7~8 | 7~8 | 7~8 | 10-6 K-1 |
Thermal Conductivity | 20 | 29 | 32 | W/mK | |
Thermal Shock Resistance (Put in Water) | 250 | 200 | 280 | ΔT °C | |
Max Working Temperature | 1,500 | 1,600 | 1700 | °C | |
Electrical Characteristics | Volume Resistance At 20°C | >1014 | >1014 | >1014 | Ωcm |
Dielectric Strength | 15×106 | 15×106 | 15×106 | V/m | |
Dielectric Constant | 9 | 10 | 10 | εr | |
One MHZ Dielectric Loss Angle at 20°C | 0.0004 | 0.0002 | 0.0001 | tanδ | |
Chemical Characteristics | Nitric Acid (60%) 90°C | 0.1 | 0.1 | 0.05 | 24H WT Loss mg/cm2 |
Sulphuric Acid (95%) 95°C | 0.3 | 0.34 | 0.22 | ||
Caustic Soda (30%) 80°C | 0.9 | 0.95 | 0.04 |
99 Alumina Ceramic Custom Finishing
Machining Ceramic Parts and Components
Machining ceramic parts and components involves shaping and finishing ceramic materials using various cutting tools and techniques. Ceramics are hard, brittle, and have low fracture toughness, making them challenging to machine compared to metals. However, due to their exceptional properties such as high temperature resistance, wear resistance, and corrosion resistance, ceramics are widely used in various industries, including aerospace, automotive, medical, and electronics.
The machining of ceramics requires specialized equipment and techniques to overcome their inherent brittleness and achieve precise results. Some of the commonly used machining processes for ceramics include:
Grinding: This is the most common method for machining ceramics. It involves using abrasive wheels or belts to remove material and achieve the desired shape and surface finish.
Diamond Turning: This process utilizes single-point diamond cutting tools to achieve high precision and surface quality. It is often used for machining complex shapes and features.
Electrical Discharge Machining (EDM): EDM is a non-contact machining process that uses electrical discharges to erode material from the workpiece. It is particularly useful for machining intricate shapes and features that are difficult to achieve with conventional machining methods.
Laser Machining: This process uses a focused laser beam to melt and vaporize material from the workpiece. It is suitable for high-precision cutting and drilling of ceramics.
Waterjet Machining: Waterjet machining utilizes a high-pressure stream of water mixed with abrasive particles to cut and shape ceramic materials. It is a versatile process that can be used for a wide range of materials and thicknesses.
Properties of Alumina material (Al2O3)
Property | Item | 95% Al2O3 | 99% Al2O3 | 99.8%Al2O3 | Unit |
Mechanical Characteristics | Color | White | light yellow | Ivory | |
Bulk Density | 3.7 | 3.85 | 3.93 | g/cm3 | |
Water Absorption | 0 | 0 | 0 | % | |
Bending Strength | 300 | 310 | 370 | MPa | |
Compressive Trength | 2,300 | 2,400 | 2500 | MPa | |
Elastic Modulus | 320 | 340 | 390 | GPa | |
Fracture Toughness | 3~4 | 3~4 | 4 | MPa m1/2 | |
Weber Coefficient | 12 | 12 | 12 | m | |
Vickers Hardness | 1,400 | 1,600 | 1850 | HV 0.5 | |
Thermal Characterics | Coefficient of Line Thermal Expansion | 7~8 | 7~8 | 7~8 | 10-6 K-1 |
Thermal Conductivity | 20 | 29 | 32 | W/mK | |
Thermal Shock Resistance (Put in Water) | 250 | 200 | 280 | ΔT °C | |
Max Working Temperature | 1,500 | 1,600 | 1700 | °C | |
Electrical Characteristics | Volume Resistance At 20°C | >1014 | >1014 | >1014 | Ωcm |
Dielectric Strength | 15×106 | 15×106 | 15×106 | V/m | |
Dielectric Constant | 9 | 10 | 10 | εr | |
One MHZ Dielectric Loss Angle at 20°C | 0.0004 | 0.0002 | 0.0001 | tanδ | |
Chemical Characteristics | Nitric Acid (60%) 90°C | 0.1 | 0.1 | 0.05 | 24H WT Loss mg/cm2 |
Sulphuric Acid (95%) 95°C | 0.3 | 0.34 | 0.22 | ||
Caustic Soda (30%) 80°C | 0.9 | 0.95 | 0.04 |