AL5702 Alumina Silica Composite Powder (3Al2O3 2SiO2)

3Al2O3-2SiO2 Powder Description:

3Al2O3-2SiO2 Powder, also known as Mullite, is a specialised material produced for plasma spraying applications in Environmental Barrier Coating (EBC) systems. These coatings protect Ceramic Matrix Composites (CMC) from temperatures up to 1 300°C (2 370°F) in the aerospace sector. Key requirements for Mullite powder include a low thermal expansion compared to conventional materials, minimal thermal conductivity, and sustained phase stability.

Mullite is typically applied over a silicon-based bond coat to prevent moisture ingress into the substrate, which could compromise the integrity of the EBC system. For enhanced protection, a top coat of rare earth silicates such as Barium-Strontium-Aluminosilicate (BSAS) or a blend of BSAS and Mullite is often employed, extending lifespan and temperature resistance.

3Al2O3-2SiO2 Powder Specifications:

3Al2O3-2SiO2 Powder Applications:

1. Aerospace: Thermal insulation layers and environmental barrier coatings are used to protect ceramic matrix composites (CMC). These coatings are crucial in aerospace engines, spacecraft, and high-temperature environments, safeguarding components from damage caused by factors such as high temperatures, oxidation, and thermal expansion.

2. Industrial Sectors: Protective coatings for thermal processing equipment, furnaces, and other industrial high-temperature facilities. These coatings can improve the thermal and corrosion resistance of equipment and extend its operational lifespan.

3. Energy Sector: Protective coatings for energy facilities such as gas turbines, boilers, and thermal power plants to enhance their efficiency and reliability.

4. Electronics Sector: Protective coatings for electronic components, packaging materials, and electronic high-temperature devices, which provide thermal barriers and insulation against environmental factors.

3Al2O3-2SiO2 Powder Packaging:

Our 3Al2O3-2SiO2 Powder is handled with care during storage and transportation to maintain the quality of our product in its original condition.

3Al2O3-2SiO2 Powder FAQ:

Q1: What are the advantages of this powder?

A1: 3Al2O3-2SiO2 Powder features a low thermal expansion coefficient, excellent insulation properties, and a highly stable phase structure, providing outstanding protective capabilities in high-temperature environments.

Q2: How is this powder applied?

A2: 3Al2O3-2SiO2 Powder is typically applied to the surface of the substrate using plasma spraying. The powder is first formed into a suspension, then sprayed onto the surface to be coated using a spray gun, and melted at high temperatures to form a coating.

Q3: What advantages does this powder have over other coating materials?

A3: Compared to conventional coating materials such as YSZ, 3Al2O3-2SiO2 Powder has a lower thermal expansion coefficient, lower thermal conductivity, and higher phase stability, making it suitable for a wider temperature range and broader environmental conditions.

Q4: What is the lifespan of this coating?

A4: The lifespan of the 3Al2O3-2SiO2 coating depends on various factors, including the application environment, operating temperature, and coating thickness. Typically, this coating can provide long-term protection in high-temperature environments when suitably designed and treated.

Q5: How should this coating be maintained?

A5: Regular inspection of the coating's integrity and ensuring a clean surface is crucial for its maintenance. If a coating is damaged or cracked, timely repair is necessary to prevent further damage.