Silicon carbide is a popular material in the industry due to its excellent mechanical, elektriksel, ve termal özellikler. One variation of SiC is recrystallized silisyum karbür (RSiC), diğer SiC varyantlarına kıyasla daha da iyi özellikler sağlayan benzersiz bir mikro yapıya sahiptir..
RSiC'nin Özellikleri
mikro yapı
RSiC has a unique mikro yapı consisting of interlocking, malzemenin yüzeyine dik olan plaka benzeri taneler. Bu mikro yapı, RSiC'ye mükemmel mekanik özellikler verir, yüksek mukavemet gibi, tokluk, ve aşınma direnci. Mikro yapı ayrıca RSiC'ye düşük bir termal genleşme katsayısı sağlar, which makes it suitable for high-temperature applications.
Mechanical Properties
RSiC has excellent mechanical properties due to its microstructure. It has a high flexural strength, which means it can withstand bending and twisting without breaking. RSiC also has a high fracture toughness, which means it can resist cracks and fractures. bunlara ek olarak, RSiC has a high hardness, which makes it resistant to wear and abrasion.
Termal Özellikler
RSiC has excellent thermal properties, making it suitable for high-temperature applications. Yüksek ısı iletkenliğine sahiptir, bu da ısıyı hızlı ve verimli bir şekilde aktarabileceği anlamına gelir. RSiC ayrıca düşük bir termal genleşme katsayısına sahiptir, bu, çatlama veya kırılma olmadan büyük sıcaklık değişikliklerine dayanabileceği anlamına gelir.
Elektriksel Özellikler
RSiC iyi bir elektrik yalıtkanıdır, bu da onu elektrik uygulamaları için uygun hale getirir. Yüksek dirence sahiptir, yani elektrik akışına direnebilir. RSiC also has a high dielektrik gücü, yani bozulmadan yüksek gerilimlere dayanabilir.
RSiC üretimi
RSiC is made from a mixture of silisyum karbür tozu, carbon, and a binder material. The silicon carbide powder is usually a mixture of alpha and beta phases. The carbon is typically in the form of graphite, and the binder material is usually a resin or wax.
Fabrication Techniques
RSiC can be fabricated using several techniques, içermek slip casting, extrusion, and injection molding. Slip casting involves pouring the mixture into a mold and allowing it to dry. Extrusion involves forcing the mixture through a die to create a specific shape. Injection molding involves injecting the mixture into a mold under high pressure.
After fabrication, the RSiC is sintered in a furnace at high temperatures. The sintering process causes the silicon carbide powder to recrystallize, forming the unique microstructure of RSiC. The sintering process also removes the binder material, leaving behind a pure RSiC material.
Applications of RSiC
Kiln Furniture
RSiC is commonly used in the ceramic industry as kiln furniture. Kiln furniture refers to the tools and supports used to hold and shape ceramic products during firing. RSiC is ideal for kiln furniture because of its high strength, termal kararlılık, and resistance to thermal shock.
Semiconductor Industry
RSiC is used in the yarı iletken endüstrisi for the production of silicon wafers. RSiC is used as a support structure for the silicon wafers during processing. RSiC’s high thermal conductivity and low coefficient of thermal expansion make it ideal for this application.
Aerospace Industry
RSiC is used in the havacılık endüstrisi for high-temperature applications. It is used in rocket nozzles, heat shields, and other components that must withstand extreme temperatures. RSiC’s high strength, termal kararlılık, and resistance to thermal shock make it ideal for this application.
Chemical Industry
RSiC is used in the chemical industry for the production of corrosive chemicals. RSiC is used as a lining material for reaction vessels and pipes. RSiC’s high chemical resistance and thermal stability make it ideal for this application.
Armor Plates
RSiC is used in the production of armor plates for military and law enforcement applications. RSiC’s high strength and hardness make it an ideal material for bullet-resistant armor.
Advantages and Disadvantages of RSiC
Avantajlar
- Excellent mechanical properties
- Excellent thermal properties
- Good electrical insulation properties
- Yüksek kimyasal direnç
- Low coefficient of thermal expansion
- High wear resistance and hardness
Dezavantajları
- Expensive compared to other SiC materials
- Difficult to produce in large quantities
- Difficult to machine due to its hardness
Çözüm
Recrystallized silicon carbide (RSiC) is a unique material with excellent mechanical, termal, ve elektriksel özellikler. RSiC’s unique microstructure gives it even better properties compared to other SiC materials. RSiC is used in a variety of applications, fırın mobilyaları dahil, yarı iletken endüstrisi, havacılık endüstrisi, chemical industry, ve zırh plakaları. RSiC, diğer SiC malzemelerine göre daha pahalı ve üretilmesi zor iken, mükemmel özellikleri onu yüksek sıcaklık ve yüksek gerilimli uygulamalar için ideal bir malzeme yapar.
