ceramic shaft

タイトルまたは説明

Advanced Ceramic Materials
 
Field of application and key aspects:
 
- Chemical Industry (corrosion protection)
- Apparatus & Mechanical Engineering (wear resistance, insulating properties)
- Avionic & Aerospace Technology (insulating properties, high-temperature stability)
- Forming Technology (wear resistance, hardness, surface properties)
- Automotive Technology (corrosion protection, insulating properties, wear resistance)
- Micro technology (insulating properties, corrosion protection, wear resistance)
- Testing Methods (insulating properties, wear resistance)
 
 
 
1. Aluminum
Is the most widely used ceramic because it offers superior wear and corrosion resistance. Additionally, the raw materials are plentiful, so the powders are low-cost. Compared to other ceramics, alumina is the lowest cost but one of the ceramics with the highest hardness. Aluminum is gas-tight material with no open porosity. It is diamond ground to achieve polished surface finishes. Common applications include:
- Sand Blast Nozzles
- Mechanical Seals
- Mud Pump Liners
- Microwave Components
- Grinding Media
- Textile and wire guides
- Oil and Gas choke beans
- Electrical Insulators
 
2. Zirconium Oxide (Zirconia)
is the toughest commercially available ceramic. We even have a hammer made out of this ceramic. This high-strength material manifests excellent wear and corrosion properties. The material can also be Hips for added strength and edge retention. Zirconia possesses a very low coefficient of friction and is available in MgO or Yttria to stabilized grades. Common applications include:
- Ceramic razor blades
- Catalyst Extrusion Dies
- Sucker Rod Balls and Seats
- Wear Bushings
- Valve Trim
- Orifice plates
- Guide Rollers and sleeves in metal
- Computer drive components
 
3. Sintered Alpha silicon carbide 
is one of the hardest, most corrosion resistant ceramics commercially available. With no free silicon, this material resists even the strongest acids. Silicon carbide also exhibits excellent thermal conductivity making it a good material for mechanical seals. SIC offers exceptional hardness, heat resistance and thermal shock resistance. Applications:
- Mechanical Seals
- Bushings
- Heat Exchanger tubes
- Spray Nozzles
- Faucet Washers
- Automatic water pump seals
- Valve Trim
 
4. Silicon nitride
Has one of the best combinations of toughness and hardness of commercially available ceramics. In addition, its low thermal expansion coefficient offers superb thermal shock resistant compared with most other ceramics. Complex geometries can be made with sintered material. The material also exhibits low density, high temperature strength, excellent wear resistance and good facture toughness. Common applications include:
- Diesel engine glow plugs
- Rocker arm pad
- Ceramic ball bearings
- Check Valves for Oil Well Applications
- Resistance Welding Fixtures
- Sand blasting nozzles
- MWD wears parts in Oil Well Drilling
- Poppet valves
- Guide rollers for steel rods and cable
- Molten Aluminum Nozzles and trim
- Valve Trim
 
5. Boron Nitride 
Is a high temperature, lubricious ceramic. It offers excellent electrical resistance, chemical stability and wet ability. Common applications include:
- Electric insulators in PVD and CVD Vacuum Coating chambers
- Break Rings for Horizontal Steel Casting
- Evaporator Boats for Aluminum Metallization
- Components for semiconductor manufacturing equipment
- Neutron absorbers
- Boron doping of Silicon wafer
- Electronic component assembling jigs
- Spacers for glass melts and nonferrous
- See-through for high voltage equipment
- Nozzles for nonferrous metals
- Crucibles for crystal growth
- Diffusion source wafers