Kaj je silicijev karbid?

Silicon carbide, commonly referred to as silicon carburundum, is a rare chemical compound that only rarely appears in nature and must be synthesized synthetically as either powder or crystal form.

Refractories are indispensable structural ceramics used in automotive, mechanical and chemical industries, environmental protection, space technology and information electronics applications. Their durability makes them resistant to thermal shock, wear and chemical corrosion – qualities which make them indispensable.

High-temperature strength

Silicon carbide boasts strength and toughness that surpasses most advanced ceramic materials, as well as resistance to high temperatures, corrosion and chemical degradation – qualities which make it suitable for demanding applications such as jet engines and medical implants.

Boron oxide in ceramic silicon offers thermal stability while resisting thermal expansion of other materials, making it suitable for electronic components. Unfortunately, its strength does not compare with that of other ceramics and has a lower coefficient of thermal expansion than aluminum.

Ceramic silicon’s strength in high temperatures depends heavily on its intergrowth phases and junction phases, such as Lu2O3, Er2O3 and Sc2O3-doped ceramics retaining their room-temperature strengths up to 1400 degC; on the contrary, Yb2O3-doped SiC displayed significant weakness at these temperatures.

High-temperature endurance

Silicon Carbide (SiC) is the strongest ceramic material, and performs admirably under high temperature conditions. With a lower density than other ceramics and excellent fracture toughness characteristics, SiC stands up well under stress without cracking under strain or shattering under stress. Furthermore, SiC’s chemical resistance makes it even more durable.

Engineered technical ceramics are often utilized in industrial settings where high temperatures are prevalent, providing furnace linings or other equipment protection from damage while withstanding the higher temperatures required for investment casting processes.

SiC ceramics can withstand the intense conditions found in jet engines and make an ideal material choice for components requiring thermal stability. Furthermore, their use in optical systems that need pixel-scale thermal regulation makes them a durable option compared to metal materials and their high temperature endurance can help manufacturers enhance system performance, efficiency and reliability.

Resistance to abrasion

Abrasion resistance is an essential characteristic to look out for in ceramic materials used in harsh environments, particularly equipment designed to function long term without degradation over time. By keeping abrasion away, equipment stays functional over time while keeping its integrity in the long run.

Boron carbide (SiC), sialon and silicon nitride ceramics are popular choices for wear-resistant applications in high temperatures. Borosilicate, sialon and silicon nitride all offer excellent chemical, thermal shock and abrasion resistance; plus their lightweight construction allows them to withstand extreme temperatures without succumbing to cracks or delamination.

Abrasion resistance is of particular concern in high-tech applications, such as those in aerospace or marine engineering. Silicon Carbide ceramic material provides excellent abrasion resistance at high temperatures while remaining acid resistant and having low density; selecting it accordingly takes careful consideration of various factors, including chemicals the device will come in contact with and its size/shape of component.

Chemical corrosion resistance

Silicon carbide ceramics are widely renowned for their ability to resist chemical degradation in extreme environments, including acids, lyes and high-temperature chemicals without incurring much damage – an attribute which makes them an excellent choice for industrial applications like tube liners and heat exchangers. Furthermore, mechanical seal parts and burner nozzles may also benefit from using silicon carbide ceramics.

Hot isostatically pressed (HIP) and sintered (S) Si3N4 with different sintering additives were investigated in various HCl and HF solutions with various molarities from 27-80 degrees C, showing that their corrosion behavior could significantly change in such environments. Results demonstrated this correlation. Sintering additives had a great influence on HIP- and S-SiN4 corrosion resistance against corrosion media environments.

Ceramic silicon stands out from its peers by boasting superior fracture toughness and thermal shock resistance, as well as excellent wear- and corrosion-resistance, making it an excellent choice for industrial applications requiring low-cost technical components.